The effect of sub‐lethal dosages of the synthetic pyrethroid fenvalerate on the reproductive rate of the aphid Myzus persicae

Publisher Website
Google Scholar
Abstract
A series of experiments in the laboratory and greenhouse, were designed to test the possible causes of the field resurgence of the aphid Myzus persicae. Stimulation of reproduction occurred at topical dosages of around the LD5 value. Residual film tests indicated a significant depression in fecundity when aphids were held on sub‐lethal deposits of fenvalerate, even at dosages below the LD5 value. Trends in the population build‐up experiments in the greenhouse suggested there may be some stimulation when aphids are confined to aged deposits of fenvalerate 7 days after treatment, but the slight increase was not significant.