无毒棉主要害虫田间消长动态研究

A Study on the Occurence Dynamic of the Pest of Low-Phenolic Cotton in the Fields

1985～1988年,通过对无毒棉(即低酚棉)主要害虫田间消长动态的系统调查,摸清了害虫田间数量变动规律,找出了与有毒棉害虫的数量差异.调查结果表明,棉蚜、棉叶螨、棉铃虫在无毒棉上的发生数量均少于或接近于有毒棉.棉盲椿象、棉蓟马、负蝗发生危害程度均明显地重于有毒棉,棉小造桥虫则无明显差异.这一研究结论,基本上消除了在无毒棉上各种害虫发生危害较有毒棉严重的错误概念,对指导无毒棉害虫的测报与防治提供了重要依据.

Systematic investigations of the occurrence dgnamic of the pest in the low-phenolic cotton fields were made during 1985~1988 and discovered the change law of the pest population density in the field, finding that the pest density in the poison cotton field turned out to be different from the number of insects harmful to the low-phenolic cotton. The data obtained through the investigation have shown that the number of cotton aphid, leaf acarid and bollworm in the poisonless cotton fields was less than or (approximated to those in the poison fields. The damage degree of plant bug, onion thrips and locusts was more severe to the poison cotton than low-phenolic one, but the leaf caterpillar did almost the same harm to the two kinds of cotton. The result of the study basically corrected the wrong conception that the pests do more harm to the poisonless cotton the poison plant and have provided a sound basis for the prevention and elimination of pest.