烟粉虱自2001年在敦煌市发现后,因该虫酷似温室白粉虱而被忽视。近2年发生为害程度逐年加重,特别是2004年在本市部分棉田严重发生,形成大暴发局面。发生面积750.9hm2,占棉花种植面积的5.3%,造成了严重的产量损失。据9月上旬测产,烟粉虱重发棉田平均籽棉产量损失51.5%。其中因单 Bemisia tabaci discovered in Dunhuang City in 2001, because of the worm resemble Greenhouse whitefly and neglected. In the past two years, the degree of harm has increased year by year, especially in some serious cotton fields in the city in 2004, forming a big outbreak situation. Occurred area of ​​750.9hm2, accounting for 5.3% of cotton acreage, resulting in serious loss of yield. According to the survey in early September, the average loss of cotton seedling cotton seedling yield 51.5% of the total loss of cotton. Which due to a single