唐山地区设施蔬菜播种面积90万余亩,其中温室播种面积28万余亩,大中小棚播种面积62万余亩。随着设施蔬菜种植年限延长,土壤中病菌和害虫存活量逐渐增多,特别是老棚区由于病菌和害虫造成蔬菜产量减少、品质下降,种植成本上升。近几年蔬菜根结线虫病在我地区设施蔬菜生产田危害多种蔬菜作物,一般造成减产10%-20%,严重的 Tangshan facilities vegetable sown area of ​​more than 90 acres, of which more than 280,000 acres of greenhouse sown area, large shed studio sown area of ​​620,000 acres. With the extension of planting vegetables, the survival rate of bacteria and pests in the soil gradually increased, especially in the old shed area due to bacteria and pests caused by reduced vegetable yield, quality decline, planting costs rise. In recent years, vegetable root-knot nematode disease in our area facilities vegetable production hazards a variety of vegetable crops, generally resulting in 10% -20% reduction, serious