Soybean gall midge, Resseliella maxima Gagne? (Diptera: Cecidomyiidae), has the potential to cause 100% yield loss in western Iowa, particularly along field edges. There are three, overlapping generations per season (each approximately 4-6 weeks in duration). Larvae feed inside the stems, making typical management using foliar insecticides, more challenging to use. The purpose of this trial was to compare three rates of a new insecticide, Plinazolin Technology, against two industry standards in soybean. Applications were targeted at the third-generation adults (overwintering population migrating to soybean) in June and July. Product efficacy was evaluated based on larval presence in the stem, percent of wilting plants, and yield.
How to Cite:
Hodgson, E. & Kolbe, B., (2023) “Soybean Gall Midge Efficacy Evaluation”, Iowa State University Research and Demonstration Farms Progress Reports 2022(7), 19-20.