近年来，美州斑潜蝇在巨鹿县迅速发展蔓延并呈逐年加重趋势。从发展情况看：冬季棚（室）较轻；3月中旬以后，主要为害棚室黄瓜、西葫芦等作物。5—6月份是发生为害高峰期。6—8月为露地蔬菜发生为害盛期，尤其6月上旬至8月上旬，遇到连续10天左右无雨的情况下为害更为严重。一 In recent years, the United States Liriomyza in the rapid development and spread in Julu County and showed increasing trend year by year. From the development of the situation: winter shed (room) light; mid-March later, the main damage shed greenhouse cucumbers, zucchini and other crops. 5-6 months is the peak incidence of damage. From June to August, it took more damage to open-field vegetables. Especially in early June to early August, it was even more serious in the absence of rain for about 10 consecutive days. one