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松苗立枯病是一个世界性的苗圃病害,各国对此构的研究已有50多年的历史,但仍未获得完滿解决。根据1956—1959年在各地病苗上分离的結果,我們发現侵染松苗产生立枯病的病菌共有三种:Rhizoctonia solani,Pythium sp.和Fuzarium spp.,其中Rhizoctonia solani是主要的。这三种病菌出現时期似受温度的影响。在早期,从松苗上分离所得的病菌多为R.solani,其次为Pythium sp.,在后期則多为鐮刀菌。除紅松外,前两种病菌多誘致松树产生猝倒型症状,而后一种則造成立枯型症状。防治松苗立枯病是个錯綜复杂的問題。因为它的病原多而又是土壤习居菌,侵染时期长,以及由树种不同和土壤性貭的差异而引起的复杂关系,使这个問
Pine seedling blight is a worldwide disease of nursery. Countries have studied this structure for more than 50 years, but have not yet been satisfactorily solved. According to the results of isolating the disease seedlings from 1956 to 1959, we found that Rhizoctonia solani, Pythium sp. And Fuzarium spp., Of which Rhizoctonia solani is the dominant one, were found to infest the seedlings of pine seedlings. The three germs appear to be affected by temperature. In the early stage, R. solani was mostly isolated from pine seedlings, followed by Pythium sp., And mostly Fusarium in later period. In addition to koraiensis, the first two kinds of bacteria caused more pine-induced cataplexy symptoms, and the latter is caused by dilapidated symptoms. Prevention and control of pine seedling blight is a complicated issue. Because of its multiplicity of pathogens but also soil habitat, long period of infection, as well as by the differences between species and soil caused by the complexity of the relationship, so that this question