在拉萨高效节能日光温室自然变温条件下,美洲斑潜蝇在豇豆上一年可发生6-7代。在夏季高温时,完成1代只需23-30d,而在冬季低温时,则需 60d左右。田间调查表明,美洲斑潜蝇在拉萨市一年有两个明显的发生为害高峰期,分别为5-6月和8-9月。美洲斑潜蝇在拉萨市发生特点为露地与保护地互为虫源,在保护地越冬,在拉萨自然环境中即露地不能越冬,并造成周年为害。 In Lhasa energy-efficient solar greenhouse natural temperature conditions, the American leafminers in the cowpea occurred 6-7 generations a year. In the summer when the high temperature, the completion of a generation only 23-30d, while in the winter when the temperature is low, it takes 60d or so. Field surveys show that there are two obvious peak occurrences in Lhasa during May to June and August to September respectively. The occurrence of Lime in the Lhasa city is characterized by mutual insects between the open field and the protected area, and overwintering in the protected area. In the natural environment of Lhasa, the open field can not wintering and cause annihilation.