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室内外试验结果表明,小卷蛾线虫Steinernema carpocapsae Agriotos对杨木囊蛾Cossus cossusL.的致病力较强,其毒力随着龄期的增大而下降。从每虫1000～5000条线虫接种中龄组的杨木蠢蛾幼虫,随着剂量增加致病力增强,并在25℃条件下毒杀效果最好。以每毫升5000条线虫的浓度防治林间杨木蠹蛾,防治效果优于敌敌畏。
The results of indoor and outdoor experiments showed that the virulence of Steinernema carpocapsae Agriotos was stronger than that of Cossus cossus L. and its virulence decreased with the increase of its age. Inoculation of nematode larvae of Populus tomentosa with 1000 ~ 5000 worms per worm increased pathogenicity with increasing doses and was most effective at 25 ℃. The prevention and control of P. gmelinii at a concentration of 5000 nematodes per milliliter was superior to that of dichlorvos.