Mon - May 22, 2017
by Christian Krupke, Soybean Entomologist, Purdue University
A large, multi-state study confirmed that by the V2 stage, tissue concentrations of thiamethoxam, the neonicotinoid insecticide applied as a coating to soybean seeds, were statistically similar to plants grown from untreated seeds.
We also found that even during aphid infestations, the neonicotinoid seed treatment produced the same yields as using no insecticide at all. The IPM treatment, combining scouting and foliar-applied insecticide where necessary, resulted in significant yield increases.
The relevance of this information for soybean producers is that an IPM approach remains a better pest management investment for the soybean aphid in the north-central region, both in terms of protecting the yield potential of the crop, and in terms of break-even probability for producers.