Tips for Avoiding Bollworms - January 2013
They asked me to talk about soybean and rice insects today, so I’m going to hit a few things, but I want to concentrate on one pest that’s really been giving you guys in this particular area a little more problem than anything else. [Slide - Worst Pest of Soybean - Corn Earworm, Cotton Bollworm, Soybean Podworm, etc. Pictures of damaged soybean pods and an insect.]
[University of Arkansas Division of Agriculture Research and Extension University of Arkansas System. Arkansas Soybean Promotion Board. Gus Lorenz, Extension Entomologist, University of Arkansas Division of Agriculture, Lonoke Research and Extension Center]
So how can we avoid the bollworms in 2012? Plant your crop as early as possible, as much of your crop as you can. Late March, early April in SE AR. You’ll are right here in the middle so you’re somewhere in either one of these. By early or mid April in NE AR. Another thing is narrowing that row width. If you’re planting on 30’s or 38’s and you’re having trouble achieving canopy closure by bloom, you need to do something different. The key in all this and the reason you plant early is so you can achieve canopy closure prior to bloom. And when we do that, we keep those bollworm numbers down to a minimum. I’m not going to tell you you won’t get the treatment level in them, but the difference between beans that are not lapped and are lapped is significant. Getting that canopy closure is the key to maintaining low bollworms numbers. Keeping them in a manageable level. [Video shows a tractor planting in a field, soybean rows and plants.]
[Slide - Avoiding bollworms in your fields; Plant part of your crop as early as possible - late March to early April in southeast Arkansas, early mid-April in northeast Arkansas.; Narrow your row width...avoid wider rows particularly on late-planted beans; The goal is to achieve canopy closure before bloom; Avoid unnecessary applications (particularly pyrethroids.)
So those are the things you need to shoot for and then avoid those unnecessary applications of pyrethroids just because you’re going across the field and you decided you wanted to throw some knock off Karate® or whatever in the tank because it’s cheap. That’s not a very good idea. And it’s causing you more problems than it’s worth.
[For additional information visit: www.uaex.edu. University of Arkansas Division of Agriculture Research and Extension University of Arkansas System. Arkansas Soybean Promotion Board]