2011•He'nan nongye kexueRequires access

Control Effects of Different Pesticides on Stem-nematode Disease of Sweet Potato

Liu Changying

Abstract

The control effects of eight pesticides on stem-nematode disease of sweet potato under field experiment conditions were evaluated.The results showed that five pesticides(45kg/ha of 5% Shennongdan G,30kg/ha of 10% Fuqiduo G,9L/ha of 22% Imidacloprid·Phoxim EC,15L/ha of 35% Phoxim FL and 15L/ha of 40% Chlorpyrifos EC) had preferable controlling effects.The control efficacy was 77.96%-89.93%,85.30%-97.91% and 83.06%-98.94%,based on diseased plants,diseased tubers and disease index,respectively.According to control efficacy,toxicity and cost-effect,9L/ha of 22% Imidacloprid·Phoxim EC and 15L/ha of 35% Phoxim FL were more suitable to control stem-nematode disease of sweet potato in production.

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Key concepts: Phoxim, Chlorpyrifos, Imidacloprid, Pesticide, Nematode, Biology, Toxicology, Horticulture