Key Issues Perspective: Corn earworm a major problem in soybeans
The new longer residual insecticide most used in 2011 was Belt from Bayer CropScience. Smith said, “I tell growers and applicators that if you stay within the labeled use rate, two to three ounces per acre, expect at least two weeks control of corn earworms. You might get a lot more. We’ve had university trials showing up to 30 days when the application was made in ideal conditions, and that is really more than you can expect out of most other insecticides.”
He also noted that some other caterpillar pests, such as loopers, are even more sensitive to Belt than corn earworm.
Smith said typically a Belt insecticide application for corn earworms would occur when soybeans are in the R3 to R4 stage when pods are developing, and this could also be the only application necessary to get through the earworm larvae attack.
For more information, you can contact Smith by e-mail at firstname.lastname@example.org.