Larvicidal activity of blastospores and conidiospores of Beauveria bassiana (strain GK 2016) against age groups of Aedes aegypti.
Laboratory bioassays of two development stages, blastospores (BS) and conidiospores (CS) of Beauveria bassiana (strain GK 2016) against Aedes aegypti larvae were conducted at 27 degrees C. In Study 1, against 24 h post-hatched larvae, both BS and CS stages showed significant difference in their respective larvicidal efficacy over the control (P less than 0.0001). Larval mortality between 24 and 96 h post-exposure was significantly higher than any other time period investigated. Significantly higher larval mortality was observed with BS or CS at 10(8) ml-1 over lower concentrations (P less than 0.05). In Study 2, against different age groups, 12-24 h post-hatched larvae showed significantly higher mortality when treated with BS or CS than older age groups (P less than 0.05). A significant difference was found in the larvicidal potency of B. bassiana at different fungal stages.
Miranpuri
G S
GS
Department of Applied Microbiology and Food Science, University of Saskatchewan, Saskatoon, Canada.
Khachatourians
G G
GG
D000330:Aedes / Q000382:microbiology*; D000367:Age Factors; D000704:Analysis of Variance; D000818:Animals; D001681:Biological Assay; D007814:Larva / Q000382:microbiology; D003904:Mitosporic Fungi / Q000502:physiology*; D010572:Pest Control, Biological; D013172:Spores, Fungal / Q000502:physiology