Cotton aphid biology as affected by cyhalothrin (Karate): aphid or host plant modification?

摘要

A study was conducted to quantify the interaction among host plant, cotton aphid, and a pyrethroid insecticide, cyhalothrin (Karate), on cotton aphid population growth potential. Aphids from Karate-treated and untreated field plots were reared on cotton leaf discs from Karate-treated and untreated plots. Data on survival and fecundity were generated at 25 deg C. Life table statistics were derived and compared among treatments. The rate of population increase, measured as the net reproductive rate, was significantly increased when aphids were reared on K-treated leaf discs compared to the aphids reared on untreated leaf discs regardless of the prior exposure of aphids to Karate insecticide, indicating a possible trophobiotic role of Karate on aphidpopulation outbreak.