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宜昌市常年保护地蔬菜面积在3700亩左右,占大春播面积的47％以上,而早辣椒、茄子、番茄、黄瓜又占大春早熟面积的55％左右,需要培育1000—1500万株秧苗。由于育苗方法的改变,苗期的病虫灾害也发生了明显的变化,主要表现在:药害、肥害、冻害、渍害等非侵染性病害加重;菌核病、灰霉病等已上升为辣椒、茄子、番茄苗期的主要病害,辣椒的白星病等均较露地育苗重,且病害种类增加;蚜虫等害虫在棚内冬季能正常生长繁殖,且能诱发煤烟病和传播病毒病;另外,猝倒病、疫病、疮痂病及番茄早疫病、茄子褐纹病等也时有发生。近几年
Yichang City, perennial protected vegetable area of 3700 acres, accounting for more than 47% of spring sowing area, and early peppers, eggplant, tomatoes, cucumber and pheasant occupy about 55% of the area, need to cultivate 1000-1500 million seedlings. Due to the change of nursery methods, the pest and disease disasters in seedling stage also changed obviously, which mainly manifested in: non-infective diseases such as phytotoxicity, fatal injury, freezing injury and waterlogging aggravating; sclerotinia and gray mold have been Rose to pepper, eggplant, tomato seedling disease, pepper starches are more exposed seedling nursery, and the types of diseases increased; aphids and other pests in the shed in the winter to normal growth and reproduction, and can induce sooty disease and transmission of the virus In addition, damping-off disease, blight, scab and early blight tomato, eggplant brown stripe disease also occur from time to time. recent years