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1994年全州县种植晚稻44.3万亩,晚稻后期禾(黍)缢管蚜大发生,发生面积31万亩,占种植面积的70％。据调查,有蚜株率达50％～75％,一般每株有蚜量为25～40头,高的上百头,严重影响水稻正常生长,经积极防治后,仍损失稻谷约80万公斤。 9月下旬开始至10月中旬初,水稻灌浆至黄熟期,大量的成、若蚜集结在稻穗上,也有的集结在叶背、叶鞘上取食为害。蚜虫体
In 1994, 44.3 hectares of late rice was planted in Quanzhou County. In the late late rice season, aphids occurred in large areas with an area of 310,000 mu, accounting for 70% of the planted area. According to the survey, the rate of aphid strains reaches 50% -75%. Generally, the number of aphids per plant is 25-40, and the high one hundred, which seriously affects the normal growth of rice. After the active control, the number of aphids is still about 800,000 kg . From late September to early October, paddy rice to yellow ripening stage, a large number of into, if the aphid buildup on the ears of rice, there are also gathered in the leaf back, leaf sheath on the feeding damage. Aphid body