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黑绒金龟子是北方甘薯定植期的主要害虫之一。成虫啃食薯秧的幼嫩芽叶,幼虫在地下食根。 1990年,黑绒金龟子在卢龙县南半部各乡危害严重。据调查,全县100％的甘薯地块不同程度受害,成为该区晚春初夏最严重的害虫之一。沙沱村700亩甘薯受害后造成毁秧重栽。黑绒金龟子在卢龙地区一年发生1代。以成虫和少量成虫在
Black velvet chafer is one of the major pests in the northern sweet potato planting period. Adults eat young shoots of potato seedlings, larvae root in the ground. In 1990, black velvet beetles were seriously endangered in the southern half of Lulong County. According to the survey, 100% of the county’s sweet potato plots have suffered to varying degrees and become one of the most serious pests in the area in late spring and early summer. Sha Tuo village 700 acres of sweet potato damage caused by replanting seedlings. Black velvet beetle occurred in Lulong a generation a year. Adults and a small amount of adults in