Study on killing efficacy of three hygienic insecticides on mosquito larvae at different temperatures
Objective To investigate larvicidal efficacy of three hygienic insecticides against mosquito at different temperatures.Methods Impregnation method was used to determine the insecticidal efficacy of three hygienic insecticides,namely,the number of dead larvae at different times under different temperature conditions was recorded,and the influence of temperature on insecticidal time was analyzed.Results The effect of three insecticides killing larvae under different temperatures was different.The killing time of cypermethrin at 25℃and 30℃was relatively longer(6.5 h),and the killing time at other temperatures was shorter,the killing time at 40℃was 0.5 h.The time of killing larvae needed by fenthion or propoxur decreased with the increase of temperature,the shortest was 0.5 h.Conclusion Different effects on insecticides was recorded with different killing time under different temperature conditions.This conclusion can be used for rapid screening of effective insecticides in mosquito-borne infectious disease prevention and control.
万方数据
维普
