目前，随着温室、塑料大棚蔬菜栽培的普及，复种指数的提高，要在小面积上搞好蔬菜生产，倒茬相当困难，而蔬菜重茬栽培又会导致土壤传染性病虫害的感染。如西红柿黄腐病、辣椒青枯病、黄瓜霜霉病以及线虫等病虫害病菌的积累与传播，使病虫害的发生与危害加剧。同时，蔬菜重茬 At present, with the popularization of greenhouse cultivation of vegetables and plastic greenhouses and the improvement of multiple cropping index, it is quite difficult to improve the production of vegetables in a small area, and the stubble cultivation of vegetables can lead to the infection of soil-borne pests. Such as tomato yellow rot disease, pepper bacterial wilt, downy mildew cucumber and nematodes and other pests and diseases of the accumulation and spread of germs and pests, the pest and disease hazards and increased. At the same time, vegetables stubble