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番茄灰霉病是近年来我市棚室番茄作物上发生为害较严重的一种病害,一般年份减产20%左右,严重时可达50%左右。此病可侵染花、果实、叶片,果实得病以青果受害重,病菌开始多从残留的柱头或花瓣侵入,后向果面或果柄扩展,导致果皮呈灰白色、软腐;病部长出大量灰绿色霉层,果实失水后僵化,易脱落,叶片染病多从叶尖开始,病斑呈“V”字型向内扩展,初呈水浸状,浅褐色,边缘不规则,具深浅相间轮纹,后干枯,表面产生灰霉层,导致叶片枯死,茎部染病,开始亦呈水浸状小点,后扩展为长椭圆形或长条形斑,湿度大时病斑长出灰褐色霉层,严重时导致病部以上植株枯死。
Botrytis cinerea is one of the most serious diseases that occur on tomato crops in greenhouse in our country in recent years. Generally, it reduces about 20% in annual yield and about 50% in severe cases. The disease can invade the flowers, fruits, leaves, fruits are sick to green fruit victims, the bacteria began more residual stigma or petal invasion, after the fruit surface or fruit stem extension, resulting in the skin was gray, soft rot; Gray-green moldy layer, the fruit after the water loss rigid, easy to fall off, leaves more leaf disease from the beginning, the lesion was “V ” type inward expansion, the initial was flooded, light brown, with irregular edges, with Dry and dark, the surface of gray mold layer, resulting in dead leaves, stem disease, the beginning was also flooded dots, then extended to long oval or strip-shaped spots, when the humidity is large Gray-brown moldy layer, in serious cases lead to disease withered plants.