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本研究在室内用“沙埋法”比较了两种斯氏属昆虫病原线虫Steinernema sp.(CB-2Y)和S.feltiae Agriotos对桃小食心虫的侵染力,结果表明CB-2Y线虫对桃小食心虫幼虫和冬茧的侵染力都高于Agriotos线虫。接线虫笫7天桃小食心虫LD50,CB-2Y组为49条线虫,而Agriotos组为158条;冬茧的LD50分别为1330条和24046条。在桃小冬茧开始活动期(6月15日)分别施用两种线虫,一个月后检查桃小食心虫成虫羽化率,CB-2Y线虫的控制效果明显优于Agriotos,在1024条线虫/桃小食心虫冬茧时(75条/cm~2),越冬代桃小食心虫的羽化率分别为8.2％和29.2％。
In this study, we compared the infectivity of Steinernema sp. (CB-2Y) and S.feltiae Agriotos to Pistacia chinensis by “Sand-Burying Method” indoors. The results showed that CB- Beet armyworm larvae and winter cocoon infectivity are higher than Agriotos nematodes. On the 7th day of nematode, 49 nematodes were found in the LD50 and CB-2Y groups, compared with 158 in the Agriotos group, and 1330 and 24046 in the winter cocoons respectively. The control of CB-2Y nematodes was superior to that of Agriotos when the nematodes were applied in the beginning of the peach-cocoon initiation activity (June 15) During the winter cocoon (75 / cm ~ 2), the emergence rate of overwintering peach moth was 8.2% and 29.2% respectively.