Evaluating the ecological impacts of pesticide seed treatments on arthropod communities in a grain crop rotation

摘要: O_LIWhile many studies have investigated non-target impacts of neonicotinoid seed treatments (NSTs), they usually take place within a single crop and focus on specific pest or beneficial arthropod taxa.nC_LIO_LIWe compared the three to an untreated control: imidacloprid + fungicide products, thiamethoxam products alone in three-year rotation full-season soybean, winter wheat, double-cropped soybean maize. Specifically, we quantified residues soil weedy annual flower buds examined treatment foliar communities, plant growth yield.nC_LIO_LITrace amounts insecticide were found flowers one species site year, which did not correspond with our treatments. Although low levels present soil, persistent. Residues highest final year study, suggesting some accumulation.nC_LIO_LIWe observed variable NSTs community; principle response curve analysis, diversity evenness values exhibited occasional community disturbances, impacted abundance various taxa. Overall, had greater effect than thiamethoxam, only also occasionally impacting communities individual taxa.nC_LIO_LIPest pressure was throughout although numbers reduced by insecticides no corresponding increases yield observed. However, contributed higher yields wheat.nC_LIO_LISynthesis applications. Pesticide can disturb even when environmental persistence active ingredient concentrations are low. The wheat maize trend increasing disturbance sampling period, that recovery from is always rapid. Our study among first demonstrate applied fungicides disrupt agroecosystems highlights need for further investigation into fungicides.nC_LI