有机酸类化合物对南方根结线虫的生物活性

Bioactivity of organic acids against Meloidogyne incognita

采用室内离体测定方法,测试了15种有机酸对南方根结线虫(Meloidogyne incognita)2龄幼虫致死率和卵孵化抑制率。结果表明,甲酸和丙酸对2龄幼虫和卵的生物活性最高,明显优于其他供试有机酸,但是活性低于对照药剂阿维菌素。对生物活性结果及有机酸化学结构进行比对发现,小分子量化合物对南方根结线虫具有较高生物活性。

Fifteen organic acids from commercial sources were assayed against Meloidogyne incognita to compare their nematicidal activity. The LC50 parameter was applied to evaluate their nematicidal activity. The present study showed that formic acid and propanoic acid had the highest corrected mortality and incubation inhibition ratio, but the bioactivity of abamectin was better than that of formic acid and propanoic acid. Through analyzing compound structure and its bioactivity, we found that the compounds with small molecular volume had more excellent activity than the others.