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广东新兴县,秋季晚稻常受粘虫为害,1955年比较严重,1958、1960、1961年也是猖獗年份,虫口密度每亩达3—10万头。 1.发生世代和时期: 历年来秋季粘虫的发生,包括两个不完整的重叠世代,即第五、六代(代次尚待证实),就其危害性看,第六代是主要的。 (1) 据1958—1962年糖蜜诱测结果(测报站):秋季粘虫蛾始见于9月上旬。早发个体完全可能在10月中旬末完成一代,成为迟熟晚稻后期的威胁。 (2) 从幼虫消长看,1962年9月上、中旬间普通出现粘虫为害,9月21日找到老熟幼虫,第二次幼虫始盛期为10月中旬。
Xinxing County, Guangdong Province, is often affected by armyworms in late autumn, but more severely in 1955. It was also a year of rampant in 1958, 1960 and 1961, with an annual population of 3-10 million head of pest population. 1. Generations and Times Occurred: The occurrence of autumn armyworms in the past years, including two incomplete overlapping generations, that is, the fifth and sixth generations (to be confirmed), the sixth generation is the major . (1) According to the results of 1958-1962 moose test (measuring station): fall armyworm began to appear in early September. It is entirely possible that the early-onset individual will complete a generation by the middle of October and become a late-threat late maturing late rice. (2) From the growth and development of larvae, in 1962 September and mid-tended to appear ordinary armyworm damage, September 21 to find mature larvae, the second larvae of the beginning of mid-October.