Pest Pressures in Soybean 2009 - November 3, 2009
With Dr. Gus Lorenz Extension Entomologist
[Title Slide – Pest Pressures in Soybean 2009; With Dr. Gus Lorenz Extension Entomologist; Number 20, November 3, 2009 Your Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]
[Dr. Gus Lorenz] 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.
[Picture of a boll worm on a leaf] This year we had problems with Boll Worms again as we did last year. [Pictures showing several boll worms in a net] 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.
[Dr. Gus Lorenz] 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 [Pictures showing a man in a soybean field sampling field for insects by using a net]. Fifteen, twenty years ago it seems like insect pressure wasn't that big an issue in soybean production. [Dr. Gus Lorenz] 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.
[Picture of a green stinkbug adult on a leaf and a stinkbug on the tip of a finger.] 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 [Pictures showing plants with 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. [Dr. Gus Lorenz] 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 [Pictures of a flooded soybean fields] but also stinkbug pressure was extremely high in a lot of these fields. [Dr. Gus Lorenz] 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.
[Narrator] 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. [Title slide - For more information contact your local county Extension office. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]