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 earlyAugust. 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.

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