葱斑潜蝇的生物学特性

葱斑潜蝇 1年发生 4～ 5代 ,世代重叠严重。以蛹在土中越冬 ,翌年 5月初越冬蛹羽化 ,5月上旬越冬代成虫开始产卵。室内自然变温饲养 ,得到全世代的发育起始温度为 10 .34℃ ,有效积温为 2 57.2 5日度。该虫主要以幼虫潜食叶肉造成危害。周年发生 ,呈春、秋季两个高峰 ,以春季为重。田间天敌主要是潜蝇姬小蜂 Diglyphus sp.、稀网姬小蜂 Euplectrus sp.以及金小蜂科 Pteromalidae中的一种寄生蜂 ,均为幼虫寄生。

Bionomics of Liriomyza chinensis (Kato)

Liriomyza chinensis is a serious pest on Lily family vegetables. It has 4 or 5 generations a year and its generations overlap severely. It overwinters in pupa in underground and adults emerge in early May. The threshold temperature of development for a whole generation is 10 34℃ and the thermal constant 257 25 daydegree. In fields, its larvae cause great damage to Lily family vegetables. Its occurrence has two peaks in spring and autumn, and is more serious in spring. The main natural enemies are Diglyphus sp ., Euplectrus sp. and one species of Pteromalidae.