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在稻、薯害虫天敌资源调查过程中,发现双斑青步甲(Chlaenius bioculatu Motschulky)对鳞翅目害虫有显著的捕食作用。成虫、幼虫白天活动十分活跃,幼虫还善钻进被害作物卷叶内捕食害虫。经调查双斑青步甲对甘薯麦蛾、甘薯卷叶螟、斜纹夜蛾、稻螟蛉、稻纵卷叶螟、菜青虫等害虫的捕食作用最为明显。为保护和利用这一天敌资源,我们对它进行生物学特性研究,现将两年来田间调查及室内饲养结果,整理如下。
During the investigation of the natural enemies of rice and potato pests, Chlaenius bioculatu Motschulky was found to have significant predation on Lepidopteran pests. Adults and larvae are very active during the day and the larvae are also good at getting predatory pests in the coil of the crop. It was found that the predation effect of the double-spot Qingtujia on the pests such as the potato leafhopper, the sweetroller, the Spodoptera litura, the rice borer, the rice leafroller and the cabbage budworm were the most obvious. In order to protect and utilize this natural enemy resource, we have conducted a study on its biological characteristics. The results of field surveys and indoor rearing in the past two years are summarized as follows.