1999年 9～ 1 0月 ,粘虫在榕江县晚稻上大面积发生 ,发生面积 80 0ｈｍ2 ,占全县晚稻种植面积的 92 .2 %。9月 1 5日调查时零星发现幼虫。 9月 2 4～ 2 5日低龄幼虫高峰期调查 ,一般田块虫量为 6万～ 8万头 /667ｍ2 ,严重田块高达 1 7万头 /667ｍ2 。 9月 2 8日至 1 0月 3日 ,? From September to October 1999, armyworms occurred on a large area in late rice in Rongjiang County, with an area of ​​80hm2, accounting for 92.2% of the total area planted with late rice in the county. September 15 investigation sporadically found larvae. From September 2-4 to September 25, the investigation of the larvae of young larvae showed that the average larvae population was between 60,000 and 80,000 / 667m2, and the number of serious fields was as high as 170,000 / 667m2. September 28 to January 30,?