Pathogenicity of Industrial Formulations of Bacillus Thuringiensis Serovar. Israelensis to Larvae of Some Culicine Mosquitoes in the Laboratory
Abstract
In the laboratory, Teknar?, a flowable concentrate formulation, and Bactimos? and Vectobac?, 2 wettable powder formulations of Bacillus thuringiensis serovar israelensis (Bti) were tested against laboratory maintained late 3rd and early 4th instars of Aedes taeniorhynchus (Wiedemann), Anopheles albimanus Wiedemann, Culex nigripalpus Theobald, Cx. restuans Theobald, Cx. salinarius Coquillett, Cx. quinquefasciatus Say, and Wyeomyia vanduzeei Dyar and Knab. Aedes taeniorhynchus was susceptible (LC"9"0 = 0.114 to 0.772 ppm) to the test formulations. Culex nigripalpus was generally the most susceptible to each formulation, followed by Cx. salinarius, Cx. quinquefasciatus, and Cx. restuans. The 3 formulations of Bti were relatively ineffective against An. albimanus and Wy. vanduzeei. Considering the relative potencies of the test formulations of Bti, Bactimos? invariably was the most effective formulation and Teknar? the least against the species tested under laboratory conditions.Downloads
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