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用以作用因子组配的生命表、种群趋势指数 (I)和控制指数评价小菜蛾颗粒体病毒与其他防治措施对小菜蛾的联合作用。结果表明 ,综合防治区的I值为 0 1 9,干扰作用控制指数为 0 0 4 ,即后代种群数量将下降为对照区的 0 0 4倍 ;病毒区的I值为 0 98、干扰作用控制指数为 0 2 0 ,即后代种群数量将下降为对照区的 0 2 0倍 ;B .t区的I值为 2 4 0 ,干扰作用控制指数为 0 4 8;赤眼蜂区的I值为 0 82 ,干扰作用控制指数为 0 1 7。从这可以看出几种生物因子对小菜蛾种群联合控制的效果
The life table, the population trend index (I) and the control index were used to evaluate the combined effects of the Plutella xylostella virus and other control measures on Plutella xylostella. The results showed that the I value in the integrated control area was 0 1 9, and the control index of disturbance was 0 0 4, that is, the population of offspring would decrease to 0 0 4 times of the control area; the I value in the virus area was 0 98 and the interference effect was controlled The index is 0 2 0, that is, the population of offspring will decrease to 0 2 0 times of the control area; the I value of Bt area is 240 and the interference control index is 0 4 8; the I value of Trichogramma area is 0 82, the interference control index is 0 1 7. From this we can see the effect of several biological factors on the combined control of diamondback moth populations