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柳瘿蚊(Rhabdophaga sp.)是柳树主要蛀干害虫,受害柳树在树干和枝条上形成瘿瘤,一般瘿瘤要比正常枝干粗1—5倍,最大的瘿瘤长度可达1米。瘿瘤积聚和消耗大量养分,使树势衰弱,影响生长,造成枯枝、枯梢。瘿瘤木材扭曲,降低了木材工艺价值。柳瘿蚊在我省苏北平原地区和长江沿岸普遍发生,为害严重。铜山县、邳县和江宁县的长江、花园公社等地,被害率在50一80％以上。铜山县耿集公社17万多株柳树严重受害,被害率达98—100％,6年生柳树平均每株有瘿瘤2.9个,最多的有10个,12年生柳树平均每株有瘿瘤9.9个,最多的有20个。1977年我们在铜山县耿集公社,对此虫进行了生活习性观察和防治试验,现将结果整理于后,以供参考。
Rhabdophaga sp. Is the major weed pest of willow, and the willow trees suffer the formation of gall tumors on the trunks and branches. Generally, nodules are 1 to 5 times more thick than normal branches and the largest nodules are up to 1 meter in length. Tumor accumulates and consumes a large amount of nutrients, making the tree weak, affecting growth, resulting in dead branches, dead shoots. Tarsus wood distortion, reducing the value of wood craft. Willow gall midge in the northern Jiangsu Plain and the Yangtze River along the coast of widespread, serious damage. Tongshan County, Pixian and Jiangning County, the Yangtze River, Garden commune and other places, the victimization rate of 50 to 80%. Tongshan County, Geng commune more than 170,000 willow trees seriously damaged, the victimization rate of 98 - 100%, 6-year-old willow average per plant tuberculate 2.9, up to 10, 12-year-old Willow average each tumor with 9.9 A, up to 20. In 1977 we Goteng commune in Tongshan County, the pests carried out the observation of life habits and prevention and control tests, the results are sorted out for reference.