美洲斑潜蝇是为害蔬菜、瓜果、花卉等经济作物的检疫性害虫。我市于1995年发现该虫为害,此后相续查明了其在蔬菜上的为害期（6—11月）和盛发期（8-10月）。为了进一步摸清其发生规律,作者于1997年对该虫春季发生情况进行了调查研究,结果报告如下: 一、调查研究方法 （一）田间调查 对我市主要蔬菜生产基地的大棚、露地栽培的各种蔬菜及田边杂草进行实地踏查,并选择生态条件基本一致的非蔬菜生产乡镇作对比调查,对有潜叶蝇为害的叶片进行初步鉴定,被害叶片隧道中粪便为黑色条纹状、无蛹苞蛹者为美洲斑潜蝇。然后确定寄主植物,调查其发生规律。 （二）室内饲养观察;将确定为美洲斑潜蝇的带 Liriomyza sativae is a quarantine pest that infects cash crops, fruits, flowers and other cash crops. In 1995, the city found that the pest damage, and subsequent identification of its damage on vegetables in the period (June-November) and full-fat period (8-10 months). In order to further clarify the occurrence of the law, the author conducted a survey on the occurrence of the insect in spring in 1997, the results are reported as follows: First, the method of investigation and research (A) field survey of the city’s major vegetable production base in greenhouse, A variety of vegetables and field side weeds were inspected on the spot, and select the ecological conditions are basically the same non-vegetable production township for comparative investigation on the leaves of mulberry leaves were harmful to the initial identification of the victim leaves tunnel black streaks, No pupal pupae were American leafminers. Then determine the host plants to investigate the occurrence of the law. (B) Indoor rearing observation; will be identified as the band of the leaf blotch