吡虫啉对5种植物寄生线虫的室内毒力测定

Toxicity of Imidacloprid Against Five Plant Parasitic Nematode

采用浸渍法,测定了不同质量浓度和时间下吡虫啉药剂对花生根结线虫2龄幼虫、程氏滑刃线虫、贝西滑刃线虫、松材线虫、腐烂茎线虫的毒力,并考察了其对花生根结线虫卵孵化抑制率。结果表明,花生根结线虫对吡虫啉药剂最为敏感,腐烂茎线虫最不敏感。在100 g/L质量浓度下,处理后48 h,吡虫啉药剂对花生根结线虫、程氏滑刃线虫、贝西滑刃线虫、松材线虫、腐烂茎线虫的致死率分别为91.00%、65.70%、45.70%、44.00%、9.67%。对花生根结线虫的卵孵化抑制率随着药剂浓度的升高而升高。

At different concentration and time, the toxicities ofimidacloprid on Meloidogyne arenaria, Bursaphelenchus arthuri, Aphelenchoides besseyi, B. xylophilus, Ditylenchus destructor were tested in the laboratory by dipping method, and the inhibition rate of egg hatching of Meloidogyne arenaria was confirmed. The results demonstrated that imidacloprid showed strong toxicities to Meloidogyne arenaria. At the concentration of 100 g/L, the mortality of Meloidogyne arenaria was 91.00%. Under the same condition, the mortalities of Bursaphelenchus arthuri, Aphelenchoides besseyi, B. xylophilus, Ditylenchus destructor were 65.70%, 45.70%, 44.00%, 9.67%, respectively. Imidacloprid had high inhibition on egg hatching of Meloidogyne arenaria. At the concentration of 100 g/L, the inhibition rate of egg hatching was 93.78%.