Selection of Native Mexican Strains of Beauveria bassiana1 with Larvicidal Potential against Aedes aegypti2

The aim of the study was to select native strains of Beauveria bassiana with toxic activity against Aedes aegypti (L.). For the bioassays, third-instar larvae of the mosquito were put into 200-ml plastic containers inoculated at an initial concentration of 1 × 106 conidia/ml of 17 strains of B. bassiana. The most-pathogenic strains were selected, and HIB-10 and HIB-4 at different concentrations (1.30 × 104, 1.30 × 105, 1.30 × 106, and 1.30 × 107 conidia/ml) were used to determine LC50 and LT50. For HIB-10, HIB-4, and GHA strains, the LC50 was 1.37 × 106, 5.87 × 105, and 4.90 × 105 conidia/ml, while LT50 was 7.2, 8.3, and 8.5 days, respectively.