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一、高粱蚜虫危害的严重性 高粱蚜(Aphis sacchari Zehn)是一种毁灭性害虫,在大发生年份,常造成巨大损失。据肇东、肇州、呼兰、兰西等4个县的调查,1949年因蚜虫危害高粱减产一半左右,1957年减产20—30％。1958年又是高粱蚜虫的大发生年,早在7月中旬,阿城、呼兰、哈尔滨等地就开始发生,当时虫株率仅10—20％,每叶虫数不过几十个,但至7月末,蚜虫已普遍蔓延,几乎棵棵发生,叶叶有虫,严重的植株起油发亮,给高粱生育带来很大威胁,群众反映:“苦干一春遇大旱,高粱起腻(蚜虫)定
The severity of aphids in sorghum Aphis sacchari Zehn is a devastating pest that often causes huge losses in years of large occurrence. According to Zhaodong, Zhaozhou, Hulan, Lansi and other 4 counties survey, in 1949 due to aphid damage sorghum cut in half about 1957, 20-30% reduction. In 1958, it was the great year of sorghum aphid. As early as mid-July, Acheng, Hulan and Harbin started to take place. At that time, the rate of insect pests was only 10-20% By the end of July, the aphids have generally spread. Almost a tree occurs. Leafy leaves and worms. Severe plants are oily and oily. This poses a great threat to the growth of sorghum. The masses said: Tired (aphids) set