 Soybean
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Pest Pressures in Soybean 2009
November 3, 2009
(3 minutes: 27 seconds)
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(3 minutes: 27 seconds)
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Audio/Video Script:
With Dr. Gus Lorenz Extension Entomologist
I'm Gus Lorenz, Extension Entomologist for the University of Arkansas
Division of Agriculture. And what I want to talk today about is some of the
problems that growers faced in the growing season this year in 2009.
This year
we had problems with Boll Worms again as we did last year. And we saw a lot of
fields in south Arkansas that had to be treated as many as two and three times
for Boll Worm.
But this phenomenon with the Boll Worms is one that seems to be
persistent for the last several years and it indicates to us the need for us to
continue to find a way to sample beans for insects on a regular basis. Fifteen,
twenty years ago it seems like insect pressure wasn't that big an issue in
soybean production. But certainly with the increase in the cost of production
and the higher yields and the better price for beans, it's to the best interest
to our producers across the state to take more time and more attention to
sampling for insect pressure.
Stinkbugs were extremely high this year in a lot of locations and as a
result of those stinkbug populations, we're beginning to see now some fields
that were impacted by soybean Green Bean Syndrome, which is a situation where
the beans don't develop normally and stay green late into the season because
they don't have any pods to make the crop mature. And that situation this year
there are a lot of fields particularly in south Arkansas and southwest Arkansas
that a combine won't go through the field this year because there's no crop. And
I think a lot of this is obviously related to environmental situation that we
had with excessive rain but also stinkbug pressure was extremely high in a lot
of these fields. And it wasn't just the fact that stinkbug numbers were high, it
was the time that they hit the fields. If we see stinkbugs appear at early in
crop the phenology, around R2, this is the time it seems like the beans can be
impacted by Green Bean Syndrome the most and that was the case in many places in
Arkansas this year. We actually had treatment level stinkbugs up to 2 and 4
times threshold before we even had a pod in the field. And when you have that
situation, Green Bean Syndrome is more likely to occur.
Your Arkansas Soybean Podcast is a production of the University of Arkansas
Division of Agriculture and was funded in part by the Arkansas Soybean Promotion
Board. For more information on soybean farming in Arkansas contact your local
county Extension Office.
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