论文部分内容阅读
立枯病又名猝倒病、萎倒病、根腐病。它不仅危害杉苗,而且也危害松树、杜仲、柑桔等树苗。我区普遍发生,危害严重。我们从1960年起,对其发生规律和防治方法进行了研究。一、发病规律杉苗立枯病有三种类型,即芽腐型、猝倒型、立枯型。在不同时期危害症状不同:幼苗出土前为芽腐型;幼苗出土后到茎部木质化前为猝倒型;幼苗基部木质化后为立枯型。我区杉苗立枯病多在3—6月间发生,在
Also known as damping-off disease, wilt disease, root rot disease. It not only endangered fir seedlings, but also endangered pine, Eucommia, citrus and other saplings. My district is widespread, serious harm. We started from 1960 on its occurrence and prevention methods. First, the incidence of law Sequoia withered blight three types, namely Bud rot type, cataplexy type, legislation dry type. Harmful symptoms in different periods are different: the seedlings were bud rot before they were unearthed; the seedlings were catapulted before stems were lignified before they were excavated; My area fir seedling blight occurred in 3-6 months, at