侵染性病害是由致病真菌、细菌、病毒、类菌原体、类病毒、线虫及寄生性种子植物等侵染引起的蔬菜幼苗组织代谢异常和不良症状,常常表现为坏死斑、叶色斑驳、卷叶、倒伏、根系褐腐和枯死。蔬菜穴盘苗侵染性病害的发生,直接影响成苗率、商品性状和育苗效益。此外,携带病原的穴盘苗定植田间后, Infectious diseases are caused by pathogenic fungi, bacteria, viruses, mycoplasma, viruses, nematodes and parasitic seed plants caused by metabolic disorders and adverse symptoms of vegetable seedling tissue, often manifested as necrotic spots, leaf color Mottled, curly leaf, lodging, root brown rot and dead. The occurrence of vegetable plug seedling infestation diseases directly affects the seedling emergence rate, commodity traits and nursery benefit. In addition, carrying the pathogen plug seedlings colonization field,