寿光县应于鲁中半岛,北纬36度,具有井灌条件,麦田套种玉米长期稳定,适宜粘虫迁入栖息,是二代粘虫常发区,玉米苗每年都有不同程度的危害,需要准确及时的做好短期预报,达到适时防治。一、发生期的预测预报二代粘虫在我县发生期年度间比较稳定,黑光灯历年诱蛾资料,一代成虫迁入期多在40—50天,蛾盛期(全代蛾量的14%至84%期间)及其高峰期(全代蛾量的50%日期)在6月上中旬,正值小麦生长后期至收获期(表一),发蛾期中前期蛾(麦收前5天之前)在麦田中产卵孵化,为有效蛾;后期蛾(麦收前5天之后)产的卵未经孵化(卵期4—5天)即可 Shouguang County should be in the Luzhong Peninsula, 36 degrees north latitude, with well irrigation conditions, corn intercropping corn long-term stability, suitable for immigrants to migrate into the habitat is the second generation of somali worm-prone areas, corn seedlings every year, varying degrees of harm, you need accurate Timely make short-term forecasts, to achieve timely prevention and treatment. First, predict the occurrence of the second generation Mythimna separate armyworms in the county during the year is relatively stable, black light calendar years of moths information, generation of migratory period of more than 40-50 days, moths (moths 14 % To 84%) and their peak (50% of the full-day moth date) in the middle and early June in the period from late growth stage to harvest stage (Table 1), early stage moths ) Hatch in oviposition in hatchery, effective moths; late moths (5 days after harvest) are not hatched eggs (4-5 days)