20 0 0年 2月中旬 ,我站到本镇胜利村 1组检查塑料大棚西瓜育苗情况 ,发现瓜农们育的西瓜苗成片死亡 ,死亡率达 4 0 %以上。仔细看瓜苗无病害 ,瓜农们把它当作病害防治 ,但缺苗仍然继续发生。后来对营养钵土进行了仔细观察 ,才发现是瓜种蝇在为害瓜苗 ,通过防治 ,才抑制了瓜种 In mid-February of 2000, I went to inspect the situation of watermelon seedling nursery in plastic shed in the 1st group of Shengli Village in this town, and found that the watermelon seedlings nurtured by melon farmers died in pieces with the death rate reaching over 40%. Carefully see melon seed disease-free, melon farmers treat it as a disease control, but the lack of seedlings still continue to occur. Later, after careful observation of the nutrient bowl soil, it was discovered that melon flies in the damage of melon seedlings, through control, it inhibited the melon species