Controlling Bollworm in Soybean - August 2010
[Title Slide - Controlling Bollworm in Soybean. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board.]
[Dr. Gus Lorenz, Extension Entomologist. Picture of bollworm] Bollworm, we feel like is one of the most destructive soybean pests that we have. You know with the high overhead heat that we are experiencing, we are getting a little slippage on our control. We’re seeing some failures and I’m not, I don’t think it’s all associated with the insecticide at all, in fact, I think a lot of our problem is application.
[Slide - Picture of a bollworm. Bollworm Control - Air, 5 gallons per acre; Ground, 10 gallons per acre] And first and foremost is volume, I think we need to keep our gallons per acre, our volume up to five gallons per acre by air, a minimum of 10 gallons per acre by ground to ensure that you get good thorough, adequate coverage into the canopy where those bollworms are.
[Slide - Picture of a bollworm. Bollworm Control - 1 percent crop oil or adjuvant] The second thing is particularly with aerial applications, we’re recommending the use of a crop oil at one percent or at least an adjuvant to help you in that situation.
[Slide - Picture of a bollworm. Bollworm Control - Pyrethroid at the recommended rate plus a half a pound of acephate] And thirdly, in these situations where we have these extremely high populations, we’re telling growers they need to spray with a pyrethroid at the recommended rate plus a half a pound of acephate, or [Dr. Gus Lorenz, Extension Entomologist] if they get into a situation where they have a retreatment, they probably need to look at some alternate chemistry such as Steward or Lannate.
[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 about 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]