Journal of Economic Entomology · 1974 · 20 citations · 0 references
Life SciencesEntomologyToxicologyInsect EcologyInsect ToxicologyPesticide ToxicologyBiological Pest ControlInsecticide ToxicityInsecticide ToxicologyOrganophosphate ToxicologyPest ControlPesticide Impacts On InsectsCarbamate PesticidesMicrobial InsecticidesOrganophosphate PesticidesSpore Survival Mechanisms
Several organophosphate and carbamate insecticides were tested on 2 commercial preparations of Bacillus thuringiensis Berliner, Biotrol XK® and Biotrol BTB®. On inert surfaces, carbaryl and stirophos decreased viability of spores from Biotrol XK preparations, but propoxur enhanced spore survival. Preparations of Biotrol BTB were tested similarly but none of the chemicals had a significant effect on survival of these spores. Trichlorfon, phosmet, methomyl, and carbofuran had no effect on either preparation. The susceptibility of tobacco budworm larvae, Heliothis virescens (F.), to Biotrol XK in combination with chemical insecticides was determined. Carbaryl was clearly synergistic; methomyl, phosmet, and carbofuran were synergistic but significance was marginal. Stirophos was antagonistic; trichlorfon and propoxur had no significant effect.