Evaluation of the toxicity of botanical pesticide toosendanin to non-target Organisms
植物源杀虫剂川楝素对环境生物安全性评价

Environmental safety assessment of non-target organisms is essential for development and application of new pesticides.According to "Experimental Guideline for Environmental Safety Evaluation of Chemical Pesticide",we investigated the toxicity of 78% toosendanin powder and 0.5% toosendanin EC to six species of organisms to evaluate the wider environmental impact of this pesticide.The results indicated that:toosendanin powder had low toxicity to quail(Coturnix chinensis),silkworm(Bombyx mori),bee(Apis mellifera),earthworm(Eisenia fetida),ladybeetle(Coccinella septempunctata) and tadpole(Rana limnochris);the toosendanin EC had low toxicity to silkworm,bee,earthworm,ladybeetle,whereas the toxicity to quails was moderate,and to tadpole was high;toosendanin powder had some effect on the growth and development of silkworm.We conclude that the toxicity of toosendanin is generally low and it is safe for organisms in the environment,but the 0.5% toosendanin EC should be applied cautiously in rice paddies and mulberry orchards.