钻心虫是我县青稞、小麦的主要害虫之一,它分布在海拔3,000—3,700米的高寒地区。在3,200—3,650米之间,发生面积和危害程度随海拔升高而增大。1971年只在河西区通宵公社一、二大队发生,面积不到400亩,毁种面积只20亩,产量损失5,850斤。1983年发展到22个公社的7,001亩,毁种900亩,产量损失30余万斤。13年来,虫害发生面积增加了17.5倍,毁种面积增加了45倍,产量损失增加了51.3倍。为了总结经验和为防治工作提供可靠依据,1982—1983年,通过实地调查、饲养观察、防治试验,基本弄清了钻心虫的生活规律,掌握了防治办法和时机,现整理报告如下: 一、形态特征:麦类钻心虫属鳞翅目〈LEIDOPTERA〉缰翅亚目〈FRENATA Beetle wormwood is one of the major pests of the county barley, wheat, which is distributed in the alpine region 3,000-3,700 meters above sea level. Between 3,200-3,650 meters, the area and degree of harm increase with altitude. In 1971, only the first and second brigade of overnight commune in Hexi District took up an area of ​​less than 400 mu and the area destroyed only 20 mu and the yield loss was 5,850 kg. In 1983, it developed 7,001 mu of 22 communes and destroyed 900 mu of land, with a loss of more than 300,000 kg. In the past 13 years, the area of ​​pests increased by 17.5 times, the area of ​​destroyed species increased by 45 times and the yield loss increased by 51.3 times. In order to summarize the experience and provide a reliable basis for prevention and control work, from 1982 to 1983, through field surveys, observation and prevention and control experiments, the basic rules of the worms’ lives were basically ascertained and the methods and timing for prevention and control were mastered. The report is summarized as follows: Morphological characteristics: wheat borer Lepidoptera halberd suborder