甘薯卷叶蛾(Brachmia triannuella Her-rich—Schaff)又名甘薯麦蛾、甘薯小蛾。自1991年以来在临沭县甘薯上严重发生,发生面积达25万余亩,占种植面积的71.5%。据调查,幼虫盛发期在7月下旬至10月初;世代重叠,一年约发生2—3代。发生地块一般卷叶率为50—80%,重发地块达90%以上;叶片被卷食后,仅剩一层透明的下表皮,严重影响了甘薯的正常生长。据测产,减产幅度为18—25%。经应用1605、甲胺磷等药剂进行 Brachmia triannuella Her-rich-Schaff, also known as sweet potato moth, sweet potato moth. Since 1991, Linshu sweet potato on the serious occurrence of an area of ​​250000 acres, accounting for 71.5% of the acreage. According to the survey, the larvae flourish in late July to early October; generation overlap, about 2-3 generations a year. Occurrence of the general land leaf volume of 50-80%, re-issued plots of more than 90%; leaf blade is rolled, leaving a layer of transparent lower epidermis, seriously affected the normal growth of sweet potato. According to the measured output, reduce production rate of 18-25%. After the application of 1605, methamidophos and other agents