黑绒金龟 Maladera orientalis motschulsky以成虫取食为主,3月上旬越冬成虫出土开始危害发芽较早的杂草、麦苗、油菜等嫩叶,树木发芽后,转移危害苹果、李子、桃等树的幼叶嫩芽,4月下旬至5月上旬再次转移危害刚刚出土的棉花、油菜、西瓜等幼苗。1988年鲁安、步昌两乡有1000亩棉苗被食,1989年4000余亩被害,翻犁毁种,被迫推迟播期15天以避危害期,但所种棉花伏桃 Maladera orientalis motschulsky dominated adult feeding. In early March, the overwintering adults began to harm the young leaves such as weeds, wheat seedlings and rape which were early germinated. After the trees were sprouted, they were transferred to the trees that were harmful to apple, plum and peach Leaf buds, late April to early May once again transferred just endanger the damage of cotton, rapeseed, watermelon and other seedlings. In 1988 Lu’an and Buchang Township, 1000 acres of cotton seedlings were fed, in 1989 more than 4,000 acres of victims, turned plow devastated, forced to postpone sowing 15 days to avoid harm period, but the kind of cotton V Peach