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作者1979～1981年研究结果表明,黑龙港地区小地老虎Agrotis ypsilon(Rott.)越冬代蛾峰有三个,初峰在4月初,中峰在4月中旬,末峰在4月下旬,其中的中、末峰是一代幼虫的主要来源,约占总虫量80％是预报和防治的重点,研究还指出:5月初初峰发育的幼虫正值3龄,中峰为2龄,末峰为1龄,此时,春玉米幼苗为2～3叶期。试验证明,用20％甲胺磷(缓释剂)以2％用量拌种,保苗效果为83.1％,经5000亩应用平均效果为88.4％,用50％甲胺磷(乳油)以1.0％用量拌种防治效果为91.5％,经50000亩应用平均效果为92.2％。对玉米、棉花安全,同时能兼治蝼蛄、金针虫,该法适用于地下虫混合发生区。
The results of the study from 1979 to 1981 indicate that there are three overwintering moths in the Agrotis ypsilon (Rott.) In the Heilongjiang area. The first peak is in early April, the middle peak is in mid-April, and the last peak is in late April. In the middle and last peak is the main source of the generation of larvae, accounting for about 80% of the total amount of insects is the focus of forecasting and prevention, the study also pointed out: Early May early peak larvae were positive when the age of 3, peak 2, the peak 1 year old, at this time, spring corn seedlings for 2 to 3 leaf stage. The experiment proved that 20% methamidophos (slow release agent) in 2% of the amount of seed dressing, seedling effect was 83.1%, 5000 acres by the application of an average of 88.4% with 50% methamidophos (EC) to 1.0% Seed dressing control effect of 91.5%, by 50000 acres of the average effect of 92.2%. Corn, cotton security, at the same time be able to cure 蝼 蛄, golden needle insects, the law applies to the occurrence of underground insect pests.