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七十年代以来,稻瘿蚊对水稻的为害加重了。近两年,我们对稻瘿蚊的生活习性进行了观察和试验,为防治工作提供了依据,现将结果整理如下。 1.稻瘿蚊的羽化 1976年9月及1977年6月通过选择两个不同温度时期的两个世代,从田间拔回一批标葱,插在盛湿沙的瓦盆中,在室内观察。 两次观察的结果,羽化均从19时开始,次日6—7时结束,高峰期出现在0—3时,分别占当晚羽化总数的63.56％(表1)和66.24％(表2)。雄蚊羽化较早,高峰期出现在20—21时,
Since the seventies, rice gall midge mosquito aggravate the damage to rice. In the past two years, we have observed and tested the living habits of rice gall midge mosquitoes and provided the basis for prevention and control work. The results are summarized as follows. 1. Fever of rice gall midge In September 1976 and June 1977, by selecting two generations of two different temperature periods, a group of scallions were pulled back from the field and inserted in a pot of damp-wet sand for indoor observation . The results of the two observations showed that both emergence started at 19:00 and ended at 6-7 the next day, while at the peak appeared at 0-3, they accounted for 63.56% (Table 1) and 66.24% (Table 2) of the total feathers of the same period. Male mosquito emergence earlier, the peak appears at 20-21,