大豆食心虫 Leguminivora glycinivorella(Matsumurg)是我县大豆的一大害虫,一般年份虫食率在20％左右,大发生时可达60％。该虫在当地一年发生一代,以老熟幼虫在土壤中结茧越冬。幼虫主要为害期在8月中旬至9月上旬。9月中旬开始脱荚入土。过去对大豆食心虫虫食率预报,多偏重于以田间发蛾量为依据,而对发蛾期以前(虫源时期)的综合影响因素研究的很少。笔者根据本所资料对此作了进 Soybean borer Leguminivora glycinivorella (Matsumurg) is a major pest of soybeans in our county. The annual pest feeding rate is about 20% in general, and up to 60% in large occurrence. This pest occurs a generation a year in the locality, overwintering cocoon with mature larvae in the soil. The main larvae damage period from mid-August to early September. In mid-September began to de-pod into the soil. In the past, the forecast of food consumption rate of soybean heartworm was mainly based on the quantity of hair moth in the field, while few studies on the comprehensive influencing factors of hair moth before (insect source period). The author made this according to the information of this institute