Abstract:
The LC50 values for malathion-resistant (PAK) and organophosphate-susceptible (FSS-II) strains of red flour beetle, Tribolium castaneum larvae were determined through residual film/filter paper impregnated method against six insecticides with novel modes of action such as abamectin (Sure 1.8 EC), spinosad (Tracer 240 SC), indoxacarb (Steward 150 SC), azadirachtin (Nimbokil 60 EC), buprofezin, and polychlorinated petroleum hydrocarbon (Tenekil 100 EC). The LC50 values of these insecticides were worked out as 178 and 261 ppm for abamectin, 6020 and 7455 ppm for spinosad, 4071 and 2154 ppm for indoxacarb, 20025 and 16405 ppm for azadirachtin, 9351 and 12450 ppm for buprofezin 25 WP, and 9933 and 6286 ppm for Tenekil 100 EC against PAK and FSS-II strains, respectively. The results revealed that abamectin was the most toxic of all insecticides tested in this study followed by indoxacarb, spinosad, buprofezin, Tenekil 100 EC and azadirachtin. Furthermore, abamectin, spinosad, and buprofezin proved more toxic to larvae of PAK strain, while indoxacarb, azadirachtin, and Tenekil 100EC to larvae of FSS-II strain.
Page(s):
768-772
DOI:
DOI not available
Published:
Journal: International Journal of Agriculture and Biology, Volume: 7, Issue: 5, Year: 2005