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合欢豆象Bruchidius terrenus(Sharp)属鞘翅目、豆象科。为合欢树种子的重要害虫,国内尚不见有系统观察报导。此虫在山西省晋中地区分布普遍,种子常年被害率为40—50％,严重年份可达90％以上。 晋中地区1年1代, 以成虫于合欢树枝、干的伤疤裂缝和翘皮下休眠越冬,常数头至十余头群集一起。翌春气温回升15℃以上时,成虫于越冬场所活动,至6月中、下旬合欢开花结荚时爬到树冠取食花器等。一般在荚内种子刚刚膨大时开始产卵,7月中、下旬
Acacia beans like Bruchidius terrenus (Sharp) is Coleoptera, legumes branch. As an important pest of Acacia seeds, there is no systematic observation report in China. The insects are widely distributed in Jinzhong, Shanxi Province. The annual pest damage rate is 40-50% and the serious year is more than 90%. Jinzhong area 1 year a generation, to adults in the acacia branches, dry scar cracks and skull sleep dormancy, constant head to more than ten head together. The next spring temperatures rose above 15 ℃, the adult activity in the overwintering place, to mid-June, late Acacia flowering pods to climb to the crown to eat flowers and so on. The pods generally begin to spawn when the seeds have just swollen, mid-July, late