Evaluation of insecticidal seed treatment for the control virulent and avirulent soybean aphid biotypes

Carlos J. Esquivel, Ph.D. Candidate

Department of Entomology,

The Ohio State University,

Wooster, Ohio. Evaluation of insecticidal seed treatment for the control virulent and avirulent soybean aphid biotypes

Evaluation of insecticidal seed treatment for the control virulent and avirulent soybean aphid biotypes

We found virulent and avirulent aphids perform similarly on seed-treated soybean under controlled and field conditions

Thiamethoxam bioactivity on soybean aphid last up to 35 days after planting

Effects of thiamethoxam via food-chain on two predatory natural enemies of the soybean aphid

Convergent lady beetles showed no significant reduction in survival when fed on soybean aphids reared on seed-treated soybean, whereas insidious flower bug were significantly affected by thiamethoxam accumulated in soybean aphids

Aerial application of small interfering (siRNA) for gene knockdown in soybean aphid

We nebulized soybean aphids with siRNA and achieved significant knockdown of a single gene in ~70% of all treated aphids

Refinement of the technique is ongoing in collaboration with the Rajashekara Laboratory at FAHRP

Future projects and collaborations:

Evaluation of seed treatment for soybean aphid virulence management

Screening of thiamethoxam resistance in soybean aphid