一株链霉菌发酵液对小菜蛾的杀虫作用研究

摘要

For reasonable development and application of Streptomyces fermentation broth ,bioassay of insecti-cidal activity of fermentation broth from strain HN 118 on Plutella xylostella eggs and different age larvae were conducted .The results showed that fermentation broth had no insecticidal effect on eggs ,while the effects on age of 2 and 3 larvae were better ,corrected mortality average were more than 70% .The strain HN118 had certain insecticidal activity .%为了合理开发和利用链霉菌发酵液，通过测定链霉菌菌株 H N118发酵液对小菜蛾卵和不同龄期幼虫的杀虫活性，研究其杀虫作用。结果表明：链霉菌菌株HN118发酵液对小菜蛾卵无作用，对2龄和3龄小菜蛾幼虫防效较好，校正死亡率平均值达到70％以上，可以确定该菌株具有一定的杀虫活性。