[The effect of water temperature on the action of bacterial insecticides against mosquito larvae].

The LD50 logarithm of Bacillus thuringiensis and B. sphaericus toxins effects on the larvae of Aedes aegypti and Culex pipiens is in inverse correlation with the water temperature. The influence of the temperature on the toxins effect on C. pipiens larvae is higher than that for A. aegypti larvae. Similarly, B. sphaericus toxin effect depends on the water temperature to a greater measure than that of B. thuringiensis toxin. The authors predict a high efficacy of B. sphaericus-based insecticides in hot climate countries.