稻瘿蚊,俗称“葱管虫”,属双翅目,瘿蚊科。以幼虫侵害水稻生长点,使生长点不能继续分化发育,使已分化的叶鞘愈合形成“葱管”、“葱禾”、“标葱”。受害的稻株不能发新叶,不能抽穗结实。1988年该虫从广东省乐昌市传入我县东部乡镇发生危害,以后逐渐蔓延扩展。1993年由于雨水充沛,全县27个乡镇普遍发生稻瘿蚊危害,发生面积达1.05万公顷,占晚稻面积77.8％,一般标葱率5％～8％,严重的50％～70％,平均 Rice gall midge mosquito, commonly known as “Onion tube worms”, is a Diptera, Di mosquito family. To larvae infested rice growth point, so that the growth point can not continue to differentiate and develop, so that the differentiation of the leaf sheath healing formed “Onion tube”, “Onion”, “Standard Onion.” Impaired rice plants can not make new leaves, can not erect strong. In 1988, the insects introduced into the villages and towns in the eastern part of our county from the city of Lechang in Guangdong Province were endangered and gradually spread and expanded. Due to the abundant rainfall in 1993, the occurrence of rice gall midge was common in 27 towns and townships in the county with an area of ​​10,500 hectares, accounting for 77.8% of the area of ​​late rice. The average yield of onions was 5% -8% and severe 50% -70%