中条山脉的夏县山区,分布有自然生长的板栗树24万余株,面积达2万余亩,以夏县泗交镇为中心延连曹家庄和祁家河两乡15个村,板栗常年产量30—40万斤。由于长期自然生长,缺乏生产管理,栗实象(虫甲)等虫害十分严重,一般为害区平均虫果率达60%左右,严重为害区达80%以上,仅栗实象(虫甲)为害每年造成的经济损失可达10万余元。据调 In Xiajian Mountain of Zhongtiao Mountain, there are more than 240,000 chestnut trees distributed naturally, with an area of ​​more than 20,000 mu. The village of Shijiaojiao in Xiaxian County is the center of the village of 15 villages of Caojiazhuang and Qijiahe, Annual output of 30-40 kg. Due to the long-term natural growth and the lack of production management, chestnut elephant (Pest) and other pests are very serious. The average rate of pests in damaged areas is about 60% and that in severely damaged areas is more than 80% Each year the economic loss caused by up to 10 million yuan. According to tune