热河省气候干燥,作物以榖子高粱为主,但每年由于钻心虫为害,榖子在产量上受到很大损失,著者于一九五一年对这项问题开始工作,关于粟钻心虫的一种粟灰色螟蛾(Diatraca shariinensis)在朝鲜和华北已早有记录牠的分布,在北方是很普遍的。 The Jehol Province has a dry climate and the crops are mainly 榖 sorghum. However, due to the damage caused by bore worms each year, 榖 榖 has suffered heavy losses in production. The authors started work on this issue in 1951, Diatraca shariinensis has long documented its distribution in North Korea and North China, and is widespread in the North.