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粘虫在本区历年以第一代发生量多,危害三麦较重。但由于虫源的增加、回迁期间适宜气候条件的配合、旱改水面积的扩大和稻田生态系、营养、温湿度条件的改善,1981～1983年在稻田连续大发生。1983年,全市537万亩水稻,有200多万亩受害较重。亩虫量一般1～2万头,多的达20～30万头;被害田一般减产5～15％,高的达30％以上。盐城、滨海、响水、赣榆、新沂和宝应等地也有类似情况。1983～1985年,我们对其发生规律和防治方法进行了研究。
Mythimna separata in the region over the years to produce the first generation of more harm to the three wheat heavier. However, due to the increase of insect sources, the coordination of appropriate climatic conditions, the expansion of drought-adapted water area and the improvement of paddy ecosystem, nutrition and temperature and humidity conditions during the return period, large continual occurrence occurred in paddy fields from 1981 to 1983. In 1983, the city’s 537 million mu of rice, more than 200 million mu hardest hit. The amount of moths is generally 1 to 20,000, more than 200,000 to 300,000. The harvested fields are generally reduced by 5 to 15% and the height is up to 30%. Yancheng, Binhai, ring water, Ganyu, Xinyi and Baoying and other places have similar situations. From 1983 to 1985, we conducted a study on its occurrence and prevention methods.