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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,俗称“瘿脖子”。一般瘿瘤要比正常枝干粗1～5倍,瘿瘤积聚和消耗大量养分,使树势衰弱,影响生长,常造成枯枝和枯梢。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发生普遍,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50～80％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。 我们组成了“三结合”的科研小组。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。
Rhabdophaga sp. Is the main weed pest of willow. Willow victims in the trunk and branches of the formation of Tumor, commonly known as “Tui neck.” Tumor generally 1 to 5 times larger than the normal branch, Tumor accumulation and consumption of a large number of nutrients, so that the weak potential of trees, affecting growth, often resulting in dead branches and shoots. Tarsus wood distortion, reducing the value of wood craft. Willow gall midge in the northern Jiangsu Plain and the Yangtze River in the common, serious damage. Tongshan County, Pixian and Jiangning County, the Yangtze River, Garden commune and other places, the victimization rate of 50 to 80%. More than 170,000 willow trees in Gengzheng Commune of Tongshan County have been severely victimized, with the rate of 98 to 100%. The 6-year-old willows averagely have 2.9 galls per plant and the maximum is 10, and the 12-year-old willow trees average 9.9% per plant. A, up to 20. We formed a “triple combination” of research groups. In Tongshan County Geng commune. The pests were observed on life habits and prevention and control tests, the results are now sorted out.