瓜列当在新疆为害比较普遍,从我们在哈密县各公社、农场的调查情况来看,一般为害率达20％～30％,严重地块更高。被害瓜糖分减少,品质下降,产量降低,所以它严重影响哈密瓜及西瓜生产的发展。根据我们多年观察:在发生列当的瓜地里,有些列当有自然干枯死亡现象,根据这个线索,我们今年试图利用这个特点进行了生物防治初步实验,现将初步结果整理如下: Melon when the damage is more common in Xinjiang, from our commune in Hami County, the survey of the situation, the general damage rate of 20% to 30%, a serious block higher. Vicia melon sugar to reduce the quality of decline, lower production, so it seriously affect the development of cantaloupe and watermelon production. According to our observation over the years: In the event of natural disasters, some of the columns are withered and died naturally. Based on this clue, this year we tried to use this feature to conduct a preliminary biological control experiment. The preliminary results are summarized as follows: