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棉蚜自1986年在叶城县首次发现至今,已有13年。其间棉蚜每年都有不同程度的发生,现已成为危害棉花的重要害虫。本文以10年间棉蚜系统调查资料为依据,结合防治实践,就叶城县棉蚜发生原因作粗浅分析,并提出防治措施。(一)棉蚜发生原因1.良好的越冬场所因冬季低温,棉蚜胎生雌蚜在室外无法越冬,但蚜卵在埋土保护条件下成活。最近几年来,由于家庭花卉和温室大棚栽培的大发展,为胎生雌蚜越冬提供了条件。冬季棉蚜随花卉、苗木进入室内越冬,并以无翅胎生雌蚜继续繁殖,春天又随花卉、苗木移置室外,产生大量有翅蚜迁飞到瓜类、棉花等寄主上繁殖为害。秋天作物收获后又迁回到花卉、苗木上和蔬菜大棚内,在室内越冬,如此循环往复。因此,室内花卉和大棚蔬莱是棉蚜次年的主要虫源。
Cotton aphid was first discovered in Yecheng County in 1986 and has been 13 years. During this period, cotton aphid occurs to different degrees each year and has become an important pest that endangers cotton. Based on the 10-year investigation data of cotton aphid system and the prevention and control practices, this paper analyzed the causes of cotton aphid in Yecheng County and put forward the control measures. (A) the causes of cotton aphid 1. A good winter place due to winter temperatures, aphids of cotton aphids in the outdoor can not wintering, but the aphid eggs survive in the buried protection. In recent years, due to the large-scale development of family flowers and greenhouse cultivation, the viviparous female aphids provide winter conditions. Winter cotton aphid with flowers, nursery stock into the winter, and the wingless viviparous female aphids continue to multiply, with flowers and seedlings in spring, relocated outdoors, resulting in a large number of winged aphids migrate to melons, cotton and other host breeding. After the autumn crop is harvested and moved back to the flowers, nursery stock and vegetable sheds, winter indoors, so cycle back and forth. Therefore, indoor flowers and greenhouse vegetables are the main source of cotton aphid the following year.