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一、番茄常见的侵染性病害主要有以下几种:猝倒病、立枯病、早疫病、晚疫病、灰霉病、叶霉病、溃疡病、病毒病和番茄根结线虫病等。1、猝倒病。猝倒病一般多发生在早春育苗时,幼苗出土后真叶展开前遭受病菌后,使幼苗基部呈水渍状暗斑,绕茎扩展,收缩成线状,继而倒伏干枯,以病株为中心向四周蔓延扩散,严重时成片倒伏,死苗。低温高湿,通风不良或者是大水漫灌容易诱发该病。2、立枯病。立枯病幼苗和大苗都会发生。发病时,病苗茎基部变褐,然后收缩变细,茎叶萎垂
First, the common tomato infective diseases are the following: damping-off disease, blight, early blight, late blight, gray mold, leaf mold, ulcer disease, viral disease and tomato root-knot nematode disease. 1, damping off disease. Damp down disease generally occurred in early spring nursery, seedlings unearthed after the true leaf unfold germs, the base of the seedling showed water stain-like dark spots around the stem expansion, contraction into a linear, and then lodging dry, the diseased strains as the center Spread to the surrounding proliferation, serious film into lodging, dead seedlings. Low temperature and humidity, poor ventilation or flood irrigation easily lead to the disease. 2, blight. Blight seedlings and seedlings will happen. Occurrence, the base of brown seedling brown, and then shrink thinner, sagging leaves