[Sensitivity of malaria mosquito larvae to bacterial insecticides in relation to handling]

The conditions for cultivation of malaria mosquito larvae were found to exert a great impact on their sensitivity to bactoculicide. Elevating keeping temperatures for An. sacharovi and An. pulcherrimus by 10-11 degrees C causes 2-4-fold increases in LC50. There are virtually no impacts of larval population during their development or temperature-population density relationships. Ten-fold increases in larval population density under which An. stephensi larvae have been grown result in 3-fold decreases in LC50. There are no impacts of temperatures and temperature-population density relationships either. There are also great larval species-specific differences in their sensitivity to bactoculicide.