在室内外试验的基础上, 应用生命表技术评价 1%苦皮藤( Celastrus angulatus Maxim .) 乳油对小菜蛾( Plutella
xylostella L.) 种群的控制作用, 结果表明, 其控制作用主要表现在对成虫产卵的忌避作用和对幼虫的拒食作用。 浓
度 10.00 mL/ L 的苦皮藤液效果最佳, 对成虫的忌避率为 73.2%, 对幼虫的选择性和非选择性拒食率分别为 94.7 %
和 93.5%, 小菜蛾种群趋势指数 I 值由对照的 21.614 0 降为 0.668 4, 干扰作用控制指数为 0.030 8。
 

Effect of celangulim on population dynamics of the diamond back moth ( DBM) , Plutella xylostella L ., was investigated in both laboratory and field, and evaluation was carried out with life-table technology .The results showed that celangulim strongly deterred the adult from laying eggs and significantly inhibited larval feeding on the plant with it .The fine effect was received when 10 .00 mL/L of celangulim was applied .At this concentration, 73 .2 %of the adults of P .xylostella was kept away from the host plant, and the selective and non-selective antifeeding rate were 94 .7 % and 93 .5 % respectively .The index of population trend of P .xylostella decreased to 0 .668 4 from 21 .614 0 in the control .The interference index of population control was 0 .030 8 .