[Study of the larvicidal activity of Bacillus thuringiensis var. israelensis on Toxorhynchitinae larvae (author's transl)].

Toxicity of Bacillus thuringiensis var. israelensis, H 14 serotype, has been tested on larvae of Toxorhynchites amboinensis, predaceous larvae of other Culicinae larvae. The Toxorhynchites larvae are not sensitive to the bacterial toxin up to relatively high dosages, except when larvae of Aedes aegypti are provided in the suspension. Mode of action of the crystal appears to be similar to the one observed in the epithelial cells of intoxicated Aedes aegypti larvae midgut.