几种主要防护林树种对棉田害虫天敌越冬诱集保护作用的研究

棉田防护林是棉花害虫天敌的重要源库之一。通过调查阿拉尔地区棉田防护林,发现防护林对棉花害虫天敌越冬有一定的诱集保护作用,且不同的树种诱集保护天敌的数量不同,10年生以上的树木诱集效果最好。防护林上诱集保护的主要棉花害虫天敌有:蜘蛛、菱斑巧瓢虫、十一星瓢虫、孪斑唇瓢虫、草蛉、黑食蚜盲蝽、华姬蝽、小花蝽等。根据棉花害虫天敌越冬对树种具有一定选择性,提出本地区单一树种防护林的改造设计方案。

Study on Trapping and Protecting Function of Overwintering of Natural Enemies of Pest of Cotton Field by Several Main Protection Forest Species

Cotton field protection forest is one of the main sources of natural enemies of injurious insect of the cotton.By investigating the cotton field protection forest in Alaer district, it was found that protection forest had trapping and protecting function on overwintering of natural enemies of injurious insect of cotton.Different species had different trapping and protecting amount.The trapping effect of trees above 10 years was the best.The main natural enemies of injurious insect of cotton which were trapped and protected on protection forest were spider,Oenopia conglobata,Coccinella undecimpanctata,Chilocorus geminus,Chrysoperl carnea,Deraeocoris punctulatus,Nabis sinoferus and so on.Overwintering of natural enemies of injurious insect of cotton had some selection,designing plans of protection forest for single tree species in local district was proposed in this paper.