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近几年来勐海县勐遮坝的甘蔗遭到金龟子危害,损失达25—30％,严重受害的田块全部失收。1981年黎明农场二分场受害面积2,200亩,其中有390多亩全部失收,1 ,800多亩严重减产。平均亩产由1981年的3.69吨,下降到1982年的2.65吨。蔗龟危害甘蔗主要是幼虫(蛴螬)取食蔗头。一龄幼虫取食蔗头附近的有机质,二龄幼虫开始转食甘蔗的根系,到了三龄便暴食蔗头,咬成洞穴,使幼苗生势瘦弱或将茎部咬断而导致缺苗。成虫在出土初期亦取食甘蔗的新叶。
In recent years, Menghai dam in Menghai County was damaged by beetles, with a loss of 25-30%. All seriously damaged plots were lost. In 1981, Dawn Farm suffered a total area of 2,200 mu, of which 390 mu were totally lost and the 1,800 mu was seriously affected. The average yield per mu has dropped from 3.69 tons in 1981 to 2.65 tons in 1982. Sugarcane damage mainly sugarcane larvae (catfish) feeding sugarcane head. The first instar larvae feed the organic matter near the sugarcane head. The second instar larva begin to feed the root system of sugarcane, and the third instar buys the sugarcane head and bites into caves, which make the seedling emaciated or bitten the stem and cause the lack of seedling. Adult early in the unearthed sugarcane also take new leaves.