棉花生育状态模型在棉虫综防中的应用效果

Effects of Applying Cotton Growth and Development Model to Integrated Control of Insect Pests of Cotton

研究了棉花生育状态模型在棉虫综合防治中的应用效果。调查结果表明 :与村民传统的治虫对照区相比 ,在以棉花生育状态指标作为指示信息进行棉虫综合防治的处理区内 ,棉叶螨为害株率降低了 3 5.6个百分点 ,伏蚜卷叶株率下降了 8.40个百分点 ;盲蝽象、玉米螟和棉铃虫的累计虫量分别下降了 91 .3 5%、93 .96%和 62 .1 6% ;天敌数量上升了 2 1 .65% ,治虫次数减少了 64.1 8% ;治虫费用下降了 58.2 6% ;棉花理论产量增加了 1 6.0 0 %。

The effects of applying cotton growth and development model to the integrated control of insect pests of cotton were studied. The investigative results showed that in comparison with the check cotton fields in which the insect pests were controlled by traditional technique, in the testing cotton fields in which the insect pests were comprehensively controlled according to the index of cotton growth and development, the rate of plant infested by spider mite decreased by 35.6 per cent, the rate of plant with rolled leaves caused by summer aphis decreased by 8.40 per cent; the accumulative number of leaf bug, corn borer and bollworm dropped by 91.35%,93.96% and 62.16% respectively; the number of natural enemy increased by 21.65%,the times and costs of controlling insect pests reduced by 64.18% and 58.26%, respectively; the theoretical yield of cotton rose by 16.00%.\;