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(一)发生为害情况 粘虫是一种毁灭性害虫,历年均有不同程度的发生,从1950年到现在,黑龙江有过三次大发生(1950年、1953年、1955年),1953年全省有宁安、牡丹江、鸡西、密山、勃利、桦川、佳木斯、富锦、集贤、呼兰、巴彦、宾县、阿城、五常、哈尔滨等27个县市发生,危害面积达23万公顷。1955年全省发生面积较1953年为少,据不完全统计,受害面积仍达十余万公顷,在大发生年份,
(1) The occurrence of damage The armyworm is a devastating pest that has experienced various degrees over the years. From 1950 to the present, there have been three major occurrences in Heilongjiang Province (1950, 1953 and 1955), and in 1953, the province There are Ningxia, Mudanjiang, Jixi, Mishan, Boli, Huachuan, Jiamusi, Fujin, Jixian, Hulan, Bayan, Binxian, Acheng, Wuchang, Harbin and other 27 counties, hazardous area 230,000 hectares. In 1955, the area of the province was smaller than that of 1953. According to incomplete statistics, the affected area still amounted to more than 100,000 hectares. In the year when it was large,