华北大黑鳃金龟 Holotrichia oblita(Falderman)是本地区一种重要地下害虫。主要为害花生、大豆、小麦、甘薯和马铃薯等旱作物。近年来,我们对其发生规律和测报等问题进行了较为系统的研究,现将结果报告如下。一、发生规律1.生活史:经灯诱、田间调查和人工饲养观察,表明华北大黑鳃金龟在江苏赣榆两年一 Holotrichia oblita (Falderman) is an important underground pest in the region. The main damage to peanuts, soybeans, wheat, sweet potatoes and potato and other dry crops. In recent years, we have carried out a systematic study on the law of its occurrence and the way of measuring and reporting. The results are reported as follows. First, the occurrence of law 1. Life history: the light lure, field surveys and artificial feeding observed, indicating that North China gill beetles in Jiangxi Ganyu two years