Location: Integrated Cropping Systems ResearchTitle: Soybean aphid-infestation levels in relation to cultivar, foliar insecticide, and insecticide seed treatment
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 12/17/2018
Publication Date: 3/19/2019
Citation: Hesler, L.S. 2019. Soybean aphid-infestation levels in relation to cultivar, foliar insecticide, and insecticide seed treatment [abstract]. https://www.entsoc.org/sites/default/files/files/2019_North_Central_Branch_Program_Book.pdf.
Technical Abstract: Soybean lines with a pyramid of two genes for soybean aphid resistance have been effective in small-cage studies. Testing them in small plots is the next logical step. A 2 × 2 × 2 experiment was conducted with soybean variety (± aphid resistance, Rag1 + Rag2), (±) insecticide seed treatment, and (±) foliar insecticide as factors over three years near Brookings, SD. The statistical significance of the three factors and their interactions varied depending on year. Generally, the resistant soybean variety and foliar insecticide application reduced soybean aphid-infestation levels, but the effect of insecticide seed treatment was not straightforward. Levels of soybean aphid were at or below the economic threshold in the three years of this experiment, and consequently yield results were generally not straightforward among treatment combinations. The value of various treatment factors is discussed in light of our results.