根结线虫病为蔬菜上的重要病害，一般造成蔬菜减产２０％～３０％，严重的减产５０％以上。根结线虫病一般夏秋季发病较重。根结线虫以卵、幼虫在土壤、寄主、病残体上越冬，主要借病土、病苗、病残体、肥料、灌溉水、农具和杂草等途径传播。当地温达２８℃左右时，越冬卵在根 Root-knot nematode disease is an important vegetable disease, the general result in 20% to 30% reduction in vegetables, a serious reduction of more than 50%. Root knot nematode disease generally heavier in summer and autumn. Root-knot nematode eggs, larvae wintering in the soil, host, disease residues, mainly by loosening soil, disease seedlings, disease residues, fertilizers, irrigation water, farm tools and weeds and other means of transmission. Local temperature of about 28 ℃, the overwintering eggs in the roots