Correlation of Mortality Rates of 'Aedes aegypti' (Diptera: Culicidae) and Chlorpyrifos Deposited on Sentinel Cage Screen Material

摘要

Sentinel cage mosquito mortality is a widely used method for assessing efficacy of ultra-low volume (ULV) spray operations. A method was developed to provide an alternative to sentinel mosquitoes for assessing efficacy of ultra-low volume (ULV) insecticide applications. A correlation (r2 = 0.793) exists between chlorpyrifos recovered from the screens of sentinel cages and mortality rates of confined adult female Aedes aegypti. Chromatographic methods were modified to accurately measure nanogram quantities of chlorpyrifos. The retention of 11 and 26 ng of chlorpyrifos/cm2 of nylon screen from the sentinel cages correlated with adult female Ae. aegypti mortality rates of 34 and 68%, respectively, 6 H posttreatment. Keywords: Aedes aegypti; Chlorpyrifos; Field tests; Gas chromatography; Laboratory analysis; Sentinel cages, Ultra-low volume. Reprints.