瓜种蝇又称种蝇、瓜蛆、根蛆等。是一种杂食性害虫。主要为害瓜类、豆类、棉花等多种作物。全国各地均有分布。一、发生规律。每年发生2～6代,以蛹越冬。成虫对未腐熟的粪肥或未发酵的饼肥有很强的趋性,所以常集中在苗床里活动,并大量产卵。每只雌虫产卵20～150粒,产于潮湿的土壤里。幼虫孵出后,钻入根组织内部为害。老熟幼虫在土中5厘米左右处化蛹,春季和春末夏 Melons species also known as fly species, melon maggot, root maggots and so on. Is a omnivorous pest. The main damage melons, beans, cotton and other crops. All over the country are distributed. First, the law occurs. Occurs every 2 to 6 generations, overwintering pupae. Adult adults are very aggressive with unfussized manure or unfermented cake and therefore often concentrate on the seedbed and spawn in large numbers. Each female spawns 20 to 150 grains and is produced in damp soil. Larvae hatch into the root tissue damage. Mature larvae in the soil about 5 cm pupation, spring and spring summer