Transcripts are auto-transcribed. If you need more accurate transcripts of an episode for ADA purposes, please contact Anthony Hanson - hans4022@umn.edu.

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I'm Ryan Miller, Crops

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Extension Educator
earlier this morning.

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We recorded in an episode of

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the Strategic Farming
Field Notes program.

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Strategic Farming Field Notes is

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a weekly program addressing

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current crop production topics.

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A live webinar is hosted at
08:00 A.M. on Wednesdays,

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throughout the cropping season.

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During the live webinar,
participants can

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join in the discussion and
get questions answered.

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An audio recording of
the live program is

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released following the webinar
via podcast platforms.

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Thanks and remember to tune
in weekly for discussion

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on current cropping and
crop management topics.

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Good morning
everyone, and welcome

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Today's session of strategic
farming field notes.

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Today we're going to be
covering quite a bit

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about what's going on in
the insect world here.

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We know we've had a few
developments going on

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both Southern Minnesota dealing
with a lot of army worms,

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but then also
Northwestern Minnesota.

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We're looking at a
new small grains

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and insect at least
to the area up there.

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To start off, we'll
talk to Dr. Ian MacRae.

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He's based out of Crookston,
an Entomologist up there.

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And then also we
have Bruce Potter,

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IPM specialist based
out of Lambert,

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Southwestern Minnesota. On two.

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I want to remind folks
that these sessions are

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brought by University of
Minnesota Extension with

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very generous support from

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Minnesota Farm families through

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the Minnesota Corn
Research Council

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and the Minnesota Soybean
Research Motion Council.

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Again, we're glad you
could join us today

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for today's update here.

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My name is Anthony Hanson.

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I'm a regional
extension educator

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in integrated pest
management based out Morris.

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I think with that I will
hand it off to Dr. Ian

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MacRae in just a second here.

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I do want to say that one
of the programs that we

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have an extension is

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what we call our Western
IPM Scout Program.

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This is funded both by the
Minnesota Wheat Growers

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and Minnesota Soybean Growers.

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And it was about
two weeks ago that

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both our scouts started

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finding insect in
northwestern Minnesota,

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specifically Norman Oman and

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a little bit in Red Lake County.

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And this was cereal leaf beetle.

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And we found out
partly through an,

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that it was the first find
in northwestern Minnesota.

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You want to talk a
little bit about what's

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the big deal with
cereal leaf beetle here

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and why that was

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both an exciting find

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but also a worrisome
find for the area.

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Sure. Thanks Anthony.

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Well, certain leaf beetle is,

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can potentially
cause economic loss.

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And what it's in

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basically all the states
that surround us,

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in my time up here, we had
not seen it in small grains.

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The MDA doesn't have a report of

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it being collected up
here in small grains.

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I spoke to one of
the local a couple

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of the local scouts they
had don't recall seeing it.

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Bruce Potter who was up
here actually, Bruce.

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You were up here before? I was.

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You were up here in the '90s?

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I guess older than you are.

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Yeah.

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But only by a few
months. But Bruce

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seems to remember seeing it,

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so it might not necessarily be

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the first time that
it's been hit.

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And it wouldn't be unusual to
have an insect come in and

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disappear if the
environmental conditions

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weren't right and have a
reinvasion when they were.

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What we do know about
this particular insect

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is that it's boy,

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what a charmer to work with.

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The adults are
quite distinctive.

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They're about a quarter
of an inch long,

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but they have very,

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very dark metallic
blue wing covers.

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The posterior portion of

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the insect is covered
by this really bright,

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dark blue and it's
very metallic.

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And then they're thorax,

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so the legs are
attached to their head

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are a very vibrant orange.

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They're not hard to miss.

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The adults really
aren't hard to miss,

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but they're not around
for a long time.

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They overwinter as adults,

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so the adults will
emerge in the spring.

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They're usually very similar
to a lot of other beetles.

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Overwinter leaf
cover and duff in

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the hedgerows and shoulder
belts move into a field,

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they make legs, they
don't feed a lot.

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In the spring, a little bit

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the eggs will hatch and
you have these larvae.

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Now, these are just charming
little creatures because

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they're a light yellow color

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and against the green
of a cereal grain,

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they would really
stand out, cover

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themselves with mucus
in their own feces.

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And now they're this really
dark brown black blob

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that actually it resembles
a little bit like a slug,

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but it also looks like

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bird droppings when
they're very small.

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And it's probably a method
of avoiding predation.

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Do you know of any other
insects that we deal with?

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At least the field crop side
of things that do that?

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Because, yeah, that's not
something I should say.

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It's, Thank God there's other
leaf beetles that do that.

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Thought Lily as well.

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I know a needles will
do the same thing.

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They also seem to

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have many of them

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seem to have this bright
yellow color as well.

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Yeah. The adults and

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the immatures will
feed in the same way,

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and that they start on
the top of the leaf,

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they're usually on
the top of the leaf.

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They start feeding down
through the leaf material,

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and they stop when
they get to the bottom

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of the bottom leaf cuticle,

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which leaves this empty area,

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and it looks like
window painting.

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The adults feed in rows.

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They're fairly mobile
and so they're

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feeding as they're
walking up the leaf

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and you have these
basically windowpane look

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like tracks as they go
up these very narrow,

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long tracks, the
larvae which are

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not as mobile as the adults.

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They do have lakes,

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but they're not as
mobile and they have

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a tendency to feed more in
a patch across the leaf.

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That actually turns out
to be a lot more damaging

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simply because when they take
right down to the cuticle,

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that cuticle is
going to eventually

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dry and the rest of the leaf,

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even if it's fed upon or not,

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will drop off and
you lose a lot of

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photosynthetic material there
when the grain gets into.

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And I should specify, these
are only on grassy crops,

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small grains, grassy weeds,

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things like that is
where you'll find them

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when they they're feeding.

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And moving around, you
have a tendency to see

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them move over to the
flag leaf when the flag

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start developing and then
they're very evident.

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It's not hard to find them.

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Really, the thresholds
are reasonably low,

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which makes because they
can cause a lot of damage.

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When the plants are small,
maybe a little six plants,

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the threshold is three eggs
or three larva per plant.

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When they get a
little bit older,

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boot, the flag starts coming up.

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It's one larva, a flag leaf.

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And a lot of that has to do with

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how devastating they
can be to a flag leaf.

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We know this thing. I've talked

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to Dr. Joo over in North Dakota,

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she's dealt with this an
awful lot more than I have.

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I gave her a call and took
a short serial leave,

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beat one on one course from her.

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She's been dealing with this for

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several years now and she

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seems to think that
they're moving,

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or moving east rather
out of Montana,

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and that seems to be how

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they're moving
across North Dakota.

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She said they find it most

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years in a number of
different counties,

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but usually it's not at
economic populations.

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And she said occasionally you'll

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get a very similar to
what we're seeing here.

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Occasionally you'll get a field

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that has a heavy population,

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but most of the ones
that we've run into

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here's you'll find the damage,

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but it's oftentimes
hard to find a large,

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and there's a lot of natural
mortality with this insect.

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There's parasites and
peristoids and predators,

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and so I think we may not
be seeing a huge outrage.

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I can tell you where we are
and are not finding it.

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We're finding populations in

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Noman and in Norman.
We've recovered in both.

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The one field that we

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first found and it was one
of the ones at the IPM

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found was actually
heavily populated and at

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one point it probably was at

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a point where it
was a threshold,

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but the vast majority of

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threshold of fields
have not been.

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In fact, that was
the only one that I

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saw that was even close.

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And I'm remembering the
numbers a little bit too.

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And I think one of the first
fields we sent you to,

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at least the scout found

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about 25% of the
plants were infested.

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And I think that's when you said

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that was a threshold
in the past?

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It was a little
bit too late Based

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on yeah, based on the feeding.

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I would say there used to be

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an awful lot more lava in
there than what we saw.

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The distribution was very
even across the field.

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I mean, I was we were
walking transect the field,

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you know, even strung out.

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We had about five
people in the field and

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you could find damage
all the way out

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into the field and you
could find Larval.

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So, we had weather field too,

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Red County, that one had about

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33% But that's a
research trial plot?

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Actually, we didn't remember.

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So, yeah, we did
we did scout down

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Highway Nine and were coming

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back from one of

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the other things we
were doing out there.

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And we did not find it on any of

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the wheat fields on nine,

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we did find it up to I think,

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about 15 to 20 mi
away from that one.

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Very heavy one? Yeah. Yes.

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So if one, those are counties,

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at least for a lot of folks
in Southern Minnesota,

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that's far
Northwestern for them.

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Is this an insect that folks

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should be keeping an islet

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for across the
rest of the state?

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I know Southeastern
Minnesota roughly.

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It actually had been
documented back and

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Mda did a survey from

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2010 historically been
found down there.

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But from our conversation,

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it sounds like it
hasn't really been

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economic threshold for people

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notice it too often down there.

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Yeah. And that's
what I'm starting

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to think, given
the distribution,

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this is not something that's

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probably just come into
this area in one year.

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But I'm guessing at
this point because we

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don't know what the
full distribution is,

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we don't know how long
they've been there. But

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The populations are so low in

256
00:10:43,380 --> 00:10:45,260
some fields that it's
entirely possible.

257
00:10:45,260 --> 00:10:46,620
This is just
something that's been

258
00:10:46,620 --> 00:10:49,000
here for a while,
we've just missed.

259
00:10:49,000 --> 00:10:51,260
There was one field we were in

260
00:10:51,260 --> 00:10:53,560
that we really had to
look hard and we did

261
00:10:53,560 --> 00:10:55,220
find a little bit of
damage and we found

262
00:10:55,220 --> 00:10:57,440
one larvae and that was
after being in that field,

263
00:10:57,440 --> 00:11:02,920
forths possible they could

264
00:11:02,920 --> 00:11:04,420
be there at very
low populations,

265
00:11:04,420 --> 00:11:05,580
and we know they're close.

266
00:11:05,580 --> 00:11:07,340
They're in Walsh
County, which is

267
00:11:07,340 --> 00:11:10,120
the county that's on the border
right above Grand Forks.

268
00:11:10,120 --> 00:11:12,140
And we do know that

269
00:11:12,140 --> 00:11:15,480
they're relatively
proximal in Minnesota.

270
00:11:15,480 --> 00:11:18,380
If you're that close, the river

271
00:11:18,380 --> 00:11:20,380
does not make much of a barrier

272
00:11:20,380 --> 00:11:22,440
for an insect that'll fly.

273
00:11:23,320 --> 00:11:27,040
Have some links in the chat
and if folks do want to

274
00:11:27,040 --> 00:11:30,160
look up a article that
just came out last week,

275
00:11:30,160 --> 00:11:33,500
Minnesota Crop News, this
type in cereal leaf beetle.

276
00:11:33,500 --> 00:11:35,440
And you should see the
article there too,

277
00:11:35,440 --> 00:11:36,820
that'll have more information

278
00:11:36,820 --> 00:11:39,880
on what we look at for
scouting thresholds,

279
00:11:39,880 --> 00:11:43,340
But what are the options we
have for insecticides for

280
00:11:43,340 --> 00:11:45,120
this insect and how
well does it work

281
00:11:45,120 --> 00:11:47,200
considering you have that
mucus layer on that?

282
00:11:47,200 --> 00:11:48,740
Is that affecting Fc

283
00:11:48,740 --> 00:11:51,440
at all or the insecticides
working pretty well?

284
00:11:51,440 --> 00:11:53,660
Well, most of the
insecticides that I

285
00:11:53,660 --> 00:11:57,100
saw you got fairly good.

286
00:11:57,100 --> 00:11:59,760
When I went onto
the arti trials,

287
00:11:59,760 --> 00:12:03,020
most of the pyrethroids seem
to be working fairly well.

288
00:12:03,020 --> 00:12:04,180
There wasn't a lot of resistance

289
00:12:04,180 --> 00:12:06,160
being recorded with this insect.

290
00:12:06,160 --> 00:12:11,400
And the other one is if

291
00:12:11,400 --> 00:12:14,440
there are certain amines
that are also available.

292
00:12:14,440 --> 00:12:15,960
But I think that
might be overkill

293
00:12:15,960 --> 00:12:17,940
if the pyrosis are working,

294
00:12:17,940 --> 00:12:20,020
you know, that's
the low price point

295
00:12:20,020 --> 00:12:21,620
and they seem to work well.

296
00:12:21,620 --> 00:12:24,100
So that would probably
be the first thing to

297
00:12:24,100 --> 00:12:27,620
go to. All right.

298
00:12:27,620 --> 00:12:30,400
I think we will move over to

299
00:12:30,400 --> 00:12:32,580
Bruce and some of the other
insect issues we have,

300
00:12:32,580 --> 00:12:34,620
but we'll definitely come

301
00:12:34,620 --> 00:12:36,800
back to you for Northwest
Minnesota because I think we'll

302
00:12:36,800 --> 00:12:39,800
talk about some
dry season insects

303
00:12:39,800 --> 00:12:42,390
and what's also happening
with that, because again,

304
00:12:42,390 --> 00:12:45,700
showing up some parts
of the state likely to

305
00:12:45,700 --> 00:12:47,100
show up in more counties

306
00:12:47,100 --> 00:12:49,240
this coming week here
unless we get some rain,

307
00:12:49,240 --> 00:12:50,980
there definitely are
some insects or keep

308
00:12:50,980 --> 00:12:53,420
an eye out for first.

309
00:12:53,420 --> 00:12:55,660
We've had a lot of calls about

310
00:12:55,660 --> 00:12:59,200
true armyworm the
last week or two,

311
00:12:59,200 --> 00:13:01,040
At least some of these

312
00:13:01,040 --> 00:13:03,060
are ones where
they're wrapping up.

313
00:13:03,060 --> 00:13:04,660
There may not be as much
they can do about it,

314
00:13:04,660 --> 00:13:07,480
but what have you seen
for true armyworm?

315
00:13:07,480 --> 00:13:09,120
Caterpillars are
getting calls in

316
00:13:09,120 --> 00:13:11,520
that both for concerns about

317
00:13:11,520 --> 00:13:14,200
what's in our field crops

318
00:13:14,200 --> 00:13:16,760
but then also what's
happening in pastures too.

319
00:13:16,760 --> 00:13:18,300
Because there's been
apparently a few calls

320
00:13:18,300 --> 00:13:19,560
coming in Southeastern
Minnesota,

321
00:13:19,560 --> 00:13:21,840
especially where
folks fed close to

322
00:13:21,840 --> 00:13:27,150
maybe 50 larvae per square
foot in some well, I mean,

323
00:13:27,150 --> 00:13:28,930
we've been worried
about army worms

324
00:13:28,930 --> 00:13:30,890
and black cutworms all spring,

325
00:13:30,890 --> 00:13:33,270
we run some pheromone traps and

326
00:13:33,270 --> 00:13:37,090
light traps for both
of those insects.

327
00:13:37,090 --> 00:13:39,490
And in the Southern
part of the state,

328
00:13:39,490 --> 00:13:41,570
when we had those heavy
rains come through,

329
00:13:41,570 --> 00:13:44,130
that those were systems that

330
00:13:44,130 --> 00:13:47,950
brought migrating insects
in from the south.

331
00:13:47,990 --> 00:13:51,230
I haven't I think I was on one

332
00:13:51,230 --> 00:13:54,030
of these previous webcasts,

333
00:13:54,030 --> 00:13:56,390
but, you know, I cut

334
00:13:56,390 --> 00:13:57,710
my personal record for

335
00:13:57,710 --> 00:13:59,430
army worms in a single night

336
00:13:59,430 --> 00:14:01,530
and a light trap that was 195.

337
00:14:01,530 --> 00:14:04,210
And then quite a few of
the following nights,

338
00:14:04,210 --> 00:14:07,290
some pretty big flights have
come in on both species.

339
00:14:07,290 --> 00:14:12,790
We've had injury to

340
00:14:12,870 --> 00:14:16,770
a lot of injury to
pastures and grass,

341
00:14:16,770 --> 00:14:18,490
hay land, that sort of thing,

342
00:14:18,490 --> 00:14:20,330
But also in corn,

343
00:14:20,330 --> 00:14:23,790
particularly where corn
was planted into rye.

344
00:14:23,790 --> 00:14:26,690
And I think we've had
people alerted to that.

345
00:14:26,690 --> 00:14:28,350
They should have been
out scouting both of

346
00:14:28,350 --> 00:14:32,030
those areas because
of the high flights.

347
00:14:34,030 --> 00:14:40,350
I think the thing to realize
here is that we've got,

348
00:14:43,430 --> 00:14:45,890
we've had a perfect storm,

349
00:14:45,890 --> 00:14:49,365
especially in Southeast
Minnesota where it's dryer.

350
00:14:49,365 --> 00:14:53,620
We had weather systems that
brought a lot of mass in.

351
00:14:53,740 --> 00:14:57,000
They were looking
for dense grasses to

352
00:14:57,000 --> 00:14:59,820
lay eggs on in case
of army worms,

353
00:14:59,820 --> 00:15:02,840
whether that be a ry cover crop

354
00:15:02,840 --> 00:15:06,500
or some sort of perennial grass.

355
00:15:06,500 --> 00:15:09,620
Then we had a dry
conditions set up

356
00:15:09,620 --> 00:15:13,120
and that slowed crop growth.

357
00:15:13,120 --> 00:15:15,260
Those larvae ran out of food

358
00:15:15,260 --> 00:15:18,020
quicker and they were
encouraged to move faster.

359
00:15:18,020 --> 00:15:21,460
And that's where they
get the term armyworm.

360
00:15:21,460 --> 00:15:25,180
When they run out of food,
those larva move in mass.

361
00:15:25,180 --> 00:15:27,800
That's what we're
dealing with right now.

362
00:15:27,800 --> 00:15:30,480
There's been multiple
flights and we've

363
00:15:30,480 --> 00:15:34,680
got quite a range of
arable sizes out there.

364
00:15:34,680 --> 00:15:38,300
And we're going to have some
issues here for a while.

365
00:15:38,300 --> 00:15:40,760
And it's not just
Southeast Minnesota.

366
00:15:40,760 --> 00:15:42,780
I know they've had
some bigger flights

367
00:15:42,780 --> 00:15:44,340
up into Northwest Minnesota,

368
00:15:44,340 --> 00:15:46,600
so we're going to
have to keep an eye

369
00:15:46,600 --> 00:15:49,740
out for at least
the next few weeks.

370
00:15:49,740 --> 00:15:53,040
Yeah. That was actually one
of the questions I had was

371
00:15:53,040 --> 00:15:55,520
how long we really need
to be keep an eye out

372
00:15:55,520 --> 00:15:58,300
for if people are seeing
an issue right now.

373
00:15:58,380 --> 00:16:00,760
When and where should
they be treating?

374
00:16:00,760 --> 00:16:03,980
If we're talking about
field crops, corn,

375
00:16:03,980 --> 00:16:05,320
how long is that susceptible

376
00:16:05,320 --> 00:16:08,630
for if they have grass
edges. But then also

377
00:16:08,630 --> 00:16:09,520
Pastures?

378
00:16:09,520 --> 00:16:12,020
When is it economical
to treat pastures,

379
00:16:12,020 --> 00:16:13,600
especially in these
stroke conditions?

380
00:16:13,600 --> 00:16:16,880
Is that something where if
you see high numbers in

381
00:16:16,880 --> 00:16:21,560
your pastures and you're
already on age out there,

382
00:16:21,560 --> 00:16:22,760
is that something
you need to be out

383
00:16:22,760 --> 00:16:23,940
there ahead of treating

384
00:16:23,940 --> 00:16:26,440
pretty heavily or is it
a little bit difficult,

385
00:16:26,440 --> 00:16:27,720
especially if some of these

386
00:16:27,720 --> 00:16:30,220
larvae are more
mature out there?

387
00:16:30,220 --> 00:16:32,580
Well, I think really if

388
00:16:32,580 --> 00:16:35,240
the guys are wanting
their hay crap,

389
00:16:35,240 --> 00:16:40,340
they want to protect it
from the insects taking it.

390
00:16:40,340 --> 00:16:43,040
The threshold is the same for

391
00:16:43,040 --> 00:16:46,580
grasslands and hay ground
as it is for small grains,

392
00:16:46,580 --> 00:16:49,580
four or five larva
per square foot.

393
00:16:49,580 --> 00:16:52,680
I think the other
thing that happens

394
00:16:52,680 --> 00:16:56,220
is movement out of those
areas, kind of similar.

395
00:16:56,220 --> 00:16:58,880
I think maybe I'll talk
about grasshoppers later on,

396
00:16:58,880 --> 00:17:01,500
but you don't want

397
00:17:01,500 --> 00:17:04,480
the larvae to move out
of those areas into,

398
00:17:04,480 --> 00:17:07,640
into your field crops,
either, particularly corn.

399
00:17:07,640 --> 00:17:10,040
And so I think,

400
00:17:10,040 --> 00:17:11,940
you know, treatment should have

401
00:17:11,940 --> 00:17:14,580
happened in some of
those fields earlier.

402
00:17:14,580 --> 00:17:16,980
Some people didn't
find the problem in

403
00:17:16,980 --> 00:17:20,460
their hay ground until they
were out there mowing.

404
00:17:20,460 --> 00:17:24,780
But I think I think definitely

405
00:17:24,780 --> 00:17:27,380
treating the treating where

406
00:17:27,380 --> 00:17:30,520
these larvae are starting
from is a good idea,

407
00:17:30,520 --> 00:17:32,980
or at least a border on
those areas before they

408
00:17:32,980 --> 00:17:36,220
get into the crops. Row crops.

409
00:17:36,220 --> 00:17:39,320
I think you mentioned
black cutworm earlier too,

410
00:17:39,320 --> 00:17:41,860
what you've been seeing
happening with that?

411
00:17:41,860 --> 00:17:45,400
Well, we've had some
pretty significant issues.

412
00:17:45,400 --> 00:17:47,820
Some of the Southern Minnesota

413
00:17:47,820 --> 00:17:49,160
beet growers have had quite a

414
00:17:49,160 --> 00:17:53,140
few have had quite a struggle
with cutworms this year.

415
00:17:53,140 --> 00:17:55,220
Some of that's the
same situation.

416
00:17:55,220 --> 00:17:57,460
A lot of guys are planting

417
00:17:57,460 --> 00:17:59,500
an ot cover crop to prevent

418
00:17:59,500 --> 00:18:02,940
erosion that's a little bit
attractive to the mass.

419
00:18:02,940 --> 00:18:05,300
Then when they kill that oats,

420
00:18:05,300 --> 00:18:07,020
they'll move to the sugar beets.

421
00:18:07,020 --> 00:18:10,170
And small sugar beets don't

422
00:18:10,170 --> 00:18:12,510
stand up to cutworms very well.

423
00:18:12,510 --> 00:18:15,330
It's multiple species of
cutworms in the beats.

424
00:18:15,330 --> 00:18:18,850
Actually we've had some
variegated cutworm issues

425
00:18:18,850 --> 00:18:20,630
or some of those
in L Flp as well.

426
00:18:20,630 --> 00:18:23,790
Again, another migrant
and I just got

427
00:18:23,790 --> 00:18:25,270
a picture last night of

428
00:18:25,270 --> 00:18:28,330
yellow striped army
worms and sugar beets.

429
00:18:28,330 --> 00:18:32,590
It's definitely a year for
migrating moth insects.

430
00:18:32,590 --> 00:18:36,510
I think something we're going
to have to keep an eye on,

431
00:18:36,510 --> 00:18:38,950
particularly with
this drier weather.

432
00:18:38,950 --> 00:18:40,790
Some of the diseases
aren't going

433
00:18:40,790 --> 00:18:43,430
to help control the
insects as well.

434
00:18:43,430 --> 00:18:45,730
I've had a few other
questions come

435
00:18:45,730 --> 00:18:47,490
in and is reminder to folks too.

436
00:18:47,490 --> 00:18:50,630
You can use the Q and A if
you have any questions,

437
00:18:50,630 --> 00:18:52,290
if you're on the, um,

438
00:18:52,290 --> 00:18:55,890
chat itself here,
but swiping glitch,

439
00:18:55,890 --> 00:18:57,870
are there any
updates on that one

440
00:18:57,870 --> 00:18:59,510
Or is it too early to be able to

441
00:18:59,510 --> 00:19:03,170
tell what the situation is
looking like this year,

442
00:19:03,170 --> 00:19:04,710
where fines might be showing up,

443
00:19:04,710 --> 00:19:06,670
or severity was down at

444
00:19:06,670 --> 00:19:09,390
our research site in Rock
County yesterday afternoon.

445
00:19:09,390 --> 00:19:12,430
And we've been monitoring
emergency cages,

446
00:19:12,430 --> 00:19:13,870
and I think the populations

447
00:19:13,870 --> 00:19:16,370
were are fairly low
again this year.

448
00:19:16,370 --> 00:19:17,610
And we didn't haven't picked up

449
00:19:17,610 --> 00:19:19,050
any in the emergency cages,

450
00:19:19,050 --> 00:19:22,130
but we do have some
plants being infested.

451
00:19:22,130 --> 00:19:24,490
Now, there's a few
orange larvae,

452
00:19:24,490 --> 00:19:26,370
so they've been there
maybe a week or more,

453
00:19:26,370 --> 00:19:29,730
but most of them are
still fairly small.

454
00:19:29,730 --> 00:19:34,020
First, in stars, that infestation
is going on right now.

455
00:19:34,020 --> 00:19:35,610
Okay.

456
00:19:35,610 --> 00:19:38,590
I think people are going
to be asking about safe.

457
00:19:38,590 --> 00:19:40,430
We'll try to have
another session

458
00:19:40,430 --> 00:19:42,370
on that coming up here soon.

459
00:19:42,370 --> 00:19:45,090
But yeah, it sounds like slaved,

460
00:19:45,090 --> 00:19:46,190
that one has been showing up.

461
00:19:46,190 --> 00:19:47,610
Some people are
finding in fields

462
00:19:47,610 --> 00:19:49,730
but obviously not
threshold levels yet.

463
00:19:49,730 --> 00:19:51,850
A little too early
for that one there.

464
00:19:51,850 --> 00:19:54,170
But the main
question I'm getting

465
00:19:54,170 --> 00:19:56,230
here is on grasshoppers.

466
00:19:56,230 --> 00:19:58,790
Both Bruce and II can hand that

467
00:19:58,790 --> 00:19:59,890
one off to both of you here

468
00:19:59,890 --> 00:20:01,410
depending on what you're seeing.

469
00:20:01,410 --> 00:20:02,930
But I know I'm seeing plenty of

470
00:20:02,930 --> 00:20:05,730
small grasshoppers and some
of the hay fields out here.

471
00:20:05,730 --> 00:20:08,150
Not anything too concerning

472
00:20:08,150 --> 00:20:10,030
yet in West central Minnesota,

473
00:20:10,030 --> 00:20:12,190
but high enough populations.

474
00:20:12,190 --> 00:20:13,650
Now, I definitely want
to keep an eye on it.

475
00:20:13,650 --> 00:20:15,130
Is that the situation?

476
00:20:15,130 --> 00:20:17,850
You both are seeing
your neck of the woods

477
00:20:17,850 --> 00:20:19,170
or are you actually

478
00:20:19,170 --> 00:20:21,750
getting pretty high
numbers out there?

479
00:20:21,750 --> 00:20:24,430
I'm seeing really
high numbers in

480
00:20:24,430 --> 00:20:27,490
alfalfa, red legged
grasshoppers.

481
00:20:27,490 --> 00:20:31,590
And it makes sense. At
least in this area.

482
00:20:31,590 --> 00:20:34,510
We've had two years of drought,

483
00:20:34,510 --> 00:20:37,750
dry weather, actually
severe drought.

484
00:20:37,750 --> 00:20:40,510
So I think that's something
people should watch.

485
00:20:40,510 --> 00:20:46,950
And again, it, it's a case
where if you're seeing

486
00:20:46,950 --> 00:20:51,270
those nymphs in these
production areas that

487
00:20:51,270 --> 00:20:53,850
hay or grasslands next to

488
00:20:53,850 --> 00:20:55,550
it keep an eye on

489
00:20:55,550 --> 00:20:58,390
that because they probably
won't stay there.

490
00:20:58,670 --> 00:21:01,950
Yeah, I concur. I don't
think our populations

491
00:21:01,950 --> 00:21:04,370
are as high as Bruce is
seeing down in the Southwest,

492
00:21:04,370 --> 00:21:07,510
but we are starting to see
stuff in the Northwest.

493
00:21:07,950 --> 00:21:12,590
Like he says, we're
starting to see nymphs.

494
00:21:12,630 --> 00:21:14,870
I've had calls already,

495
00:21:14,870 --> 00:21:17,350
which is early in the season.

496
00:21:17,350 --> 00:21:20,890
I think we've probably had
a little bit more rain

497
00:21:20,890 --> 00:21:24,930
in the fall and maybe a
little bit more early spring.

498
00:21:24,930 --> 00:21:27,910
Our populations might not
necessarily be as high.

499
00:21:27,910 --> 00:21:31,350
Certainly the recipe for
grasshopper populations,

500
00:21:31,350 --> 00:21:33,910
any years or dry fall

501
00:21:33,910 --> 00:21:35,150
followed by a dry spring is

502
00:21:35,150 --> 00:21:36,750
going to give you grasshoppers.

503
00:21:36,750 --> 00:21:38,990
Um, like I said,

504
00:21:38,990 --> 00:21:41,370
we're probably not
as high as Bruce,

505
00:21:41,370 --> 00:21:42,610
but yeah, that's
something people

506
00:21:42,610 --> 00:21:44,410
should be watching
and scouting for.

507
00:21:44,410 --> 00:21:45,890
Hitting the edges of the fields

508
00:21:45,890 --> 00:21:47,670
and seeing what their
populations are,

509
00:21:47,670 --> 00:21:50,270
like something that should
be on their radar screen.

510
00:21:50,270 --> 00:21:54,030
Yeah, that's a good
reminder for folks.

511
00:21:54,030 --> 00:21:56,790
I think we've hit on it a few
times over the years here.

512
00:21:56,790 --> 00:21:59,310
But grasshoppers are
a dry season pests.

513
00:21:59,310 --> 00:22:02,210
Partly just because
when it's wet,

514
00:22:02,210 --> 00:22:04,330
you have more mortality due

515
00:22:04,330 --> 00:22:07,590
to fungi that might go
after grasshoppers.

516
00:22:07,590 --> 00:22:09,270
Bruce, you want to talk a little

517
00:22:09,270 --> 00:22:11,170
bit more about those conditions.

518
00:22:11,170 --> 00:22:12,730
You know, when they do well

519
00:22:12,730 --> 00:22:14,770
versus why they don't do well.

520
00:22:14,770 --> 00:22:17,270
Then the worst thing,

521
00:22:17,270 --> 00:22:20,310
and I want to a comment here,

522
00:22:20,310 --> 00:22:21,850
it's not every field in

523
00:22:21,850 --> 00:22:24,770
every area that's
got grasshoppers.

524
00:22:24,770 --> 00:22:28,150
It depends a lot on

525
00:22:28,150 --> 00:22:30,710
the previous year's weather and

526
00:22:30,710 --> 00:22:34,150
particularly last fall
and this early spring.

527
00:22:34,150 --> 00:22:37,230
But the worst thing for
grasshopper nymphs,

528
00:22:37,230 --> 00:22:39,830
and I think correct
me if I'm wrong,

529
00:22:39,830 --> 00:22:42,210
is when those nymphs
are hatching.

530
00:22:42,210 --> 00:22:44,370
If you have a cool, wet period,

531
00:22:44,370 --> 00:22:46,090
there's two things that happen.

532
00:22:46,090 --> 00:22:49,390
One is disease. One,
it's too cold from,

533
00:22:49,390 --> 00:22:51,590
to move and they
starve to death.

534
00:22:51,590 --> 00:22:54,670
We haven't had that this spring.

535
00:22:55,470 --> 00:22:59,250
Species I'm seeing right
now are species that tend

536
00:22:59,250 --> 00:23:02,230
to hatch later like
the red leg stripes.

537
00:23:02,230 --> 00:23:05,810
And I'm not seeing
much of all at all.

538
00:23:05,810 --> 00:23:08,730
Yeah, I think our populations
are a little heavier for

539
00:23:08,730 --> 00:23:10,330
two stripes up here than

540
00:23:10,330 --> 00:23:12,390
down there. They're a
little bit more common.

541
00:23:12,390 --> 00:23:14,070
And that could be also because

542
00:23:14,070 --> 00:23:16,810
the red lakes have a
tendency to prefer

543
00:23:16,810 --> 00:23:23,010
that warmer drier climates
than the two K two stripes.

544
00:23:23,010 --> 00:23:25,790
But we used to get a lot of

545
00:23:25,790 --> 00:23:28,470
red lakes down in high
plains in Colorado,

546
00:23:28,470 --> 00:23:30,650
so that's why I
was thinking that.

547
00:23:30,650 --> 00:23:37,550
But yeah, Bruce is
100% right there.

548
00:23:37,550 --> 00:23:40,730
The wrong conditions
for grasshopper at

549
00:23:40,730 --> 00:23:41,870
the early season
and when they're

550
00:23:41,870 --> 00:23:44,220
hatching out is a great
condition for us.

551
00:23:44,220 --> 00:23:46,650
You know, they're very,

552
00:23:46,650 --> 00:23:49,290
that's by far the most,

553
00:23:49,770 --> 00:23:53,530
it's by far the most sensitive
stage in their lives.

554
00:23:53,530 --> 00:23:55,230
They don't know when
they're emerging.

555
00:23:55,230 --> 00:23:57,250
If they don't find
food within a meter,

556
00:23:57,250 --> 00:23:59,890
they're probably
not going through.

557
00:23:59,890 --> 00:24:02,750
So and that's one of the
reasons why those, you know,

558
00:24:02,750 --> 00:24:04,030
those hot dry springs

559
00:24:04,030 --> 00:24:08,370
are if it's followed
a hot dry fall,

560
00:24:08,370 --> 00:24:10,330
you can start to see hoppers.

561
00:24:10,330 --> 00:24:14,950
But if you've got that cool
period and it's moist,

562
00:24:14,950 --> 00:24:16,990
the fungal diseases
are going to take off.

563
00:24:16,990 --> 00:24:18,670
As Bruce said, that's going

564
00:24:18,670 --> 00:24:21,290
to have a lot of
mortality on the young.

565
00:24:21,290 --> 00:24:25,610
And as he said, moving is
critical. They've got to feed.

566
00:24:25,610 --> 00:24:27,950
There's not a lot of resources,

567
00:24:27,950 --> 00:24:29,690
food resources,
nutritive resources,

568
00:24:29,690 --> 00:24:31,010
and a grasshopper egg.

569
00:24:31,010 --> 00:24:35,070
And so they need to take
on calories pretty quick.

570
00:24:35,070 --> 00:24:36,790
And if they can't move or if

571
00:24:36,790 --> 00:24:38,510
it's bare ground or something,

572
00:24:38,510 --> 00:24:39,990
they can't get to food, it's

573
00:24:39,990 --> 00:24:41,910
going to be pretty
tough for them.

574
00:24:41,910 --> 00:24:45,950
So we've been talking
about forages a bit here,

575
00:24:45,950 --> 00:24:47,910
especially on the
army worm side.

576
00:24:47,910 --> 00:24:49,510
And that applies
to grasshoppers,

577
00:24:49,510 --> 00:24:50,650
we're finding a lot of it.

578
00:24:50,650 --> 00:24:52,450
How about soybeans though?

579
00:24:52,450 --> 00:24:55,890
When is that a more
acceptable crop?

580
00:24:55,890 --> 00:24:57,570
Are we looking at that
later in the season

581
00:24:57,570 --> 00:24:59,970
or do we have enough
defoliation now?

582
00:24:59,970 --> 00:25:02,290
We'd be worried
about our soybeans.

583
00:25:02,290 --> 00:25:04,510
For grasshoppers?

584
00:25:04,510 --> 00:25:05,850
For grasshoppers, yes.

585
00:25:05,850 --> 00:25:09,250
Well, I think is

586
00:25:09,250 --> 00:25:12,910
more two stripes up there
in Northwest Minnesota.

587
00:25:12,910 --> 00:25:14,910
Northern part of the
state down here.

588
00:25:14,910 --> 00:25:17,610
Those are replaced
by differential.

589
00:25:17,610 --> 00:25:20,330
They are larger grasshoppers.

590
00:25:20,330 --> 00:25:22,350
The differentials hatch later,

591
00:25:22,350 --> 00:25:24,610
but differentials and red

592
00:25:24,610 --> 00:25:28,110
legged particularly will
lay eggs and soybeans,

593
00:25:28,110 --> 00:25:31,490
especially if they like
firm ground, bare ground.

594
00:25:31,490 --> 00:25:35,710
So no tail type situations are

595
00:25:35,710 --> 00:25:38,650
preferred that
alfalfa is perfect

596
00:25:38,650 --> 00:25:40,310
for them because there's a lot

597
00:25:40,310 --> 00:25:42,505
of bare ground in
amongst the plants.

598
00:25:42,505 --> 00:25:46,240
Um, and I think the other
thing to worry about,

599
00:25:46,240 --> 00:25:50,580
not so much on grass
hay but on alfalfa,

600
00:25:50,580 --> 00:25:55,900
is blister beetle larvae
feed on the eggs and if

601
00:25:55,900 --> 00:25:57,620
you've got high populations of

602
00:25:57,620 --> 00:26:01,240
grasshoppers in those
alfalfa fields laying eggs,

603
00:26:01,240 --> 00:26:04,360
you have a tendency to
pull in blister beetles.

604
00:26:04,360 --> 00:26:06,280
And then now you've
got an issue for

605
00:26:06,280 --> 00:26:10,000
hay quality, particularly
with horses.

606
00:26:10,360 --> 00:26:13,400
Actually, we've
gotten some calls

607
00:26:13,400 --> 00:26:15,260
on those blister beetles up.

608
00:26:15,260 --> 00:26:17,680
We've talked about that on
our crops calls before.

609
00:26:17,680 --> 00:26:20,860
And yeah, I've had some
fields who I've seen

610
00:26:20,860 --> 00:26:23,420
the great blister
beetles showing up

611
00:26:23,420 --> 00:26:26,720
in alfalfa on the edges
in central Minnesota.

612
00:26:26,720 --> 00:26:28,440
And if you have the beef cattle,

613
00:26:28,440 --> 00:26:29,660
they're a little more
tolerant to that.

614
00:26:29,660 --> 00:26:31,340
But yeah, like you said, horses,

615
00:26:31,340 --> 00:26:33,000
that's more of a concern there.

616
00:26:33,000 --> 00:26:35,480
The take home was
with blister beetles.

617
00:26:35,480 --> 00:26:38,860
And this can be our wrap up
question here for folks.

618
00:26:38,860 --> 00:26:40,820
That's one where we're saying

619
00:26:40,820 --> 00:26:42,300
that if you're going to mow,

620
00:26:42,300 --> 00:26:44,500
give it some time for
those beetles to disperse.

621
00:26:44,500 --> 00:26:46,560
Don't be crimping it or spray

622
00:26:46,560 --> 00:26:48,840
insecticide because that's
a case where you just

623
00:26:48,840 --> 00:26:50,860
have the beetles
left in the hay and

624
00:26:50,860 --> 00:26:54,000
then you're going to
have that irritant from

625
00:26:54,000 --> 00:26:55,420
the beetles that's
going to get into

626
00:26:55,420 --> 00:26:56,920
the livestock a lot easier

627
00:26:56,920 --> 00:26:58,400
because you're just going
to have more beetles

628
00:26:58,400 --> 00:27:00,060
out there or Bruce,

629
00:27:00,060 --> 00:27:01,320
do you have any
other thoughts on

630
00:27:01,320 --> 00:27:02,680
those blister beetles and

631
00:27:02,680 --> 00:27:05,080
what they're up
to in the fields?

632
00:27:05,360 --> 00:27:09,270
Just be aware of Yeah,

633
00:27:09,270 --> 00:27:11,230
I can catch people off
guard a little bit.

634
00:27:11,230 --> 00:27:14,170
I think given by the calls
we're getting in here,

635
00:27:14,170 --> 00:27:16,290
don't let that Alp alpha Bloom

636
00:27:16,290 --> 00:27:20,430
because that'll congregate
them in the field as well.

637
00:27:20,430 --> 00:27:22,890
All right. Well, I think

638
00:27:22,890 --> 00:27:25,550
that we're about time
to wrap up here.

639
00:27:25,550 --> 00:27:26,850
Again, thanks everyone for

640
00:27:26,850 --> 00:27:28,750
attending today's
Field notes program.

641
00:27:28,750 --> 00:27:30,410
We want to, again,
thank our sponsors,

642
00:27:30,410 --> 00:27:32,890
the Minnesota Soybean Research
and Promotion Council

643
00:27:32,890 --> 00:27:35,730
and the Minnesota Corn
Research Promotion Council.

644
00:27:35,730 --> 00:27:38,030
Thanks to Bruce Potter, Dr.

645
00:27:38,030 --> 00:27:40,930
I Mcrae, for joining
us this morning.

646
00:27:40,930 --> 00:27:42,330
And have a great
rest of the day,

647
00:27:42,330 --> 00:27:44,570
everyone, and we'll
see you next week.