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美洲斑潜蝇是蔬菜上的一种危险性害虫,1994年传入我国,1995年在我市普遍发生,当年受害面积即达20万亩,此后每年均有不同程度的发生。该虫在我国华北地区自然环境下难以越冬,但由于近几年棚室栽培的迅速发展,为其在我市安全越冬创造了条件。据调查,美洲斑潜蝇冬季集中在大棚内越冬并继续繁殖危害,入春以后,随着气温上升为害加重,至谷雨前后,大田作物播种出苗或者移栽生长后,开始由大棚内扩散到大田为害。美洲斑潜蝇主要以幼虫潜叶危害,取食叶肉而剩表皮,影响光合作用而造成减产。成虫则以产卵器刺伤叶片,吸食汁液,并产卵
The American lousefish is a dangerous pest on vegetables. It was introduced to our country in 1994 and occurred in our city in 1995, when the affected area was up to 200,000 mu. There were different degrees every year thereafter. The insect is hard to wintering in the natural environment of North China in China. However, due to the rapid development of greenhouse cultivation in recent years, it has created conditions for its safe overwintering in our city. According to the survey, the American leafminers fly concentrated in the winter winter and continue to reproduce the dangers of the spring, after the spring, as the temperature increased harm to the valley before and after the rain, sowing crops or transplanting growth, began to spread from the greenhouse to Daejeon Harmful. Liriomyza sativae mainly to harm the larvae of the leaves, leave the epidermis fed on the leaves, affecting photosynthesis and reduce production. Adult eggs are stabbed leaves, taking juice, and lay eggs