Insecticide Toxicity to the Three Insects from Ohio Ponds
MetadataShow full item record
Citation:The Ohio Journal of Science. v76, n1 (January, 1976), 19-24
Three insect species from Ohio ponds, the damselfiy, Lestes congener, backswimmer, Notonecta undulata, and crawling water beetle, Peltodytes spp., were examined for susceptibility (96-hr LC50) to insecticides representing the major classes (organochlorines, carbamates and organophosphates). For all three species, propoxur and carbaryl (carbamates) were generally the least toxic of all insecticides (LCoo from 0.16 to 8.0 ppm); dichlorvos (phosphate) . and malathion (phosphorodithioate) (LC50 from 0.02 to 1.0 ppm) were more toxic than the carbamates; lindane (LC50 from 0.003 to 0.2 ppm) was more toxic than dichlorvos and malathion; parathion and chlorpyriphos (phosphorothioates) and dieldrin were the most toxic of all insecticides examined (LC50 from 0.0008 to 0.007 ppm); DDT (LC50 from .001 to 0.1 ppm) exhibited the widest range of toxicity among the three insects. In all cases, mortality increased with exposure time. Piperonyl butoxide synergized allethrin and Zectran ® in Peltodytes spp.
Author Institution: Department of Entomology, The Ohio State University
Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.