论文部分内容阅读
细腰金针虫已成为影响我县小麦、玉米主要粮食作物产量的地下害虫之一。据调查,1983年东安家庄村王春江5.5亩夏玉米被害,死苗20—40％,秋播小麦平均死苗29.4％,严重的达44.4％;东庄村王庆文2亩小麦平均死苗28.4％,严重的达40％。一般每平方米有幼虫20—30条,最多高达60条,其它乡、村也遭到不同程度的危害。为此经过几年的调查研究和防治试验,搞清了该虫在我县的发生规律,找到了最佳防治办法。一、发生规律。细腰金针虫两年发生一个世代。越冬虫多数在10—40Cm土中越冬,最深可达62cm,当春季10cm地温回升到0℃以上时,便开始上迁,当土壤全部解陈后,大约10天左右,一般3月底4月初地温在10℃以上时,80—90％的幼虫上升到20cm耕层,开始取
Slender honeysuckle has become one of the underground pests affecting the yield of wheat and maize grain crops in our county. According to the survey, in 1983, 5.5 hectares of summer maize were harvested from Wangchunjiang village of Dongzhuang village of Zhuang Village, 20-40% of dead seedlings and 29.4% of dead seedlings were smoothed in autumn, reaching 44.4% of the average. In Dongzhuang Village, Wang Qingwen 28.4% Serious up to 40%. Generally there are 20-30 larvae per square meter, up to 60, other townships, villages have also been varying degrees of harm. After several years of investigation and research and prevention and control tests, we found out the law of occurrence of this pest in our county and found the best prevention and cure method. First, the law occurs. Slender pink needleworm two generations of a generation. The majority of overwintering pests in 10-40Cm soil overwinter, the deepest up to 62cm, when the spring 10cm temperature rose to above 0 ℃, they began to move up, when the soil all the solution Chen, about 10 days, usually the end of March early April temperature Above 10 ° C, 80-90% of larvae rise to 20 cm of plow and begin to take