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随着生态环境条件的改变,大豆食心虫在我区危害日趋严重。一般年份虫食率在15％以上,大发生年份可达40—60％,严重影响了大豆的品质和产量。针对这一问题,我们于1982年至1984年连续三年对大豆食心虫发生规律与防治技术进行了初步研究,研究结果如下: 发生规律的研究 (一)发生时期大豆食心虫在我区一年发生一代,以老熟幼虫在土中结茧越冬。根据我们三年的观察,7月下旬——8月中旬,越冬幼虫开始向
With the change of ecological environment conditions, the soybean beetle in our area harms more and more serious. Insects in the general year rate of 15% or more, the occurrence of large up to 40-60%, seriously affecting the quality and yield of soybean. In response to this problem, we conducted a preliminary study on the regularity and control technology of soybean borer from 1982 to 1984. The research results are as follows: (1) Occurrence regularity (1) Soybean borer occurred one year in our district , With mature larvae cocoon wintering in the soil. According to our three-year observation, in late July - mid-August, overwintering larvae began to move towards