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稻瘿蚊（ＰａｃｈｙｄｉｏｐｌｏｓｉｓＯｒｙｚａｓｅＷｏｏｄｍａｓｏｎ）是水稻上的一种主要害虫，它对中、晚稻为害很大。自１９９３年在广昌县头陂镇首次发现稻瘿蚊以来至１９９８年止，该县１６个镇已全部发现了稻瘿蚊，并正以每年１０～２０ｋｍ的速度由南向北扩展。现
Pachydioplosis Oryzase Woodmason is a major pest on rice, which is harmful to middle and late rice. Since the first discovery of rice gall midge in Tiaocheng in Guangchang County in 1993 until 1998, rice gall midge has been found in 16 towns in the county and is expanding from south to north at a speed of 10 to 20 km per year. Now