棉田烟粉虱发生规律及防治措施

由于温室大棚数量增多,使烟粉虱得以周年繁殖,繁殖世代由露地年发生7～8代,增加到12代,加上温室拆棚前未进行彻底防治,大量虫源转移露地,尤其是棉田内虫口百叶高达万头以上,严重影响棉花生长。根据近年对该虫防治实践,提出晚上采用高效低毒无残留农药喷洒叶背,防效比白天喷施约可提高60%。

Studies on Occurrence Rule and Pest Control Measure of Bemisia tabaci in Cotton Fields

As a result of increase in the number of greenhouse to Bemisia tabaci to the annual breeding,, which made the annual reproduction of Bemisia tabaci, propogation from generation to generation by the open field occurred in 7～8 generations to 12 generations. We did not do pest control with the demolition of greenhouse, cause to the source of pest the transfer of a large number of open field, especially within the pest in cotton fields as high as 10 000 to seriously affect the cotton growth, in accordance with the practice of pest control in recent years, the night without the use of the high efficiency and low toxicity pesticide residues dorsal spraying, anti-effective spraying during the day can increase about 60%.