沙蒿大粒象的生物学特性
Biological characteristics of Adosomussp
马凤莲 宗世祥 王建伟 王 荣 骆有庆
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作者单位：北京林业大学省部共建森林培育与保护教育部重点实验室 北京 100083
中文关键词：沙蒿大粒象；沙蒿；形态特征篇；生物学；天敌
英文关键词：Adosomus sp., Artemisia spp, morphological characteristics, biology, natural enemies
中文摘要：沙蒿大粒象Adosomus sp.，是近几年在我国宁夏、内蒙古、陕西等地沙蒿灌木林中大面积发生的一种钻蛀性害虫。在宁夏盐池，该虫1年1代，以成虫和老熟幼虫在沙蒿根部越冬。越冬成虫始见于4月中下旬，终见于6月中旬；越冬老熟幼虫5月中旬开始化蛹，成虫始见于6月下旬，终见于8月上旬。成虫产卵于沙蒿根茎部至地下2 cm之间，外被一层1～2 mm厚的沙壳。幼虫主要分布在地下根部12 cm以内，主要钻蛀沙蒿根部，在根部作蛹室化蛹；成虫取食沙蒿叶片作为营养补充。
英文摘要：Adosomus sp.(Coleoptera： Curculionidae) is a serious boring insect of Artemisia spp. shrub in Ningxia, Inner Mongolia and Shaanxi in recent years. It occurred one generation each year and overwintered as mature larvae or adults in the roots of Artemisia spp. in Yanchi, Ningxia. Overwintering adults appeared from middle or late- April to middle-June, and overwintering larvae began to pupate in the middle of May. Adults emerged from late-June to earlyAugust. The beetles laid eggs in the surface of roots with the depth of 2 cm, and individual egg was covered with 1～2cm thickness sand. Larvae were distributed mainly within 12 cm of roots under ground, and mainly caused damage to roots of Artemisia spp.. Adults fed on the leaves of Artemisia spp. as the supplement of nutrition.