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经病苗组织分离培养确定,杉苗猝倒病的病原菌,Rhizoctonia solani占59.7％、Fusarium spp.占38.9％、Pythium spp.占1.4％。在室内通过Trichoderma harzianum(Fo60)对敌克松(Dexon)耐药性测定表明,Fo60对敌克松有极大耐性;经田间小区试验表明,同对照相比,每平方米施敌克松4克三天后再施Fo60菌粉50克,只施菌粉50克和只施敌克松4克处理,三种病原菌引起的杉苗猝倒病分别减少71.1％、53.4％、43.8％;由R.solani导致的杉苗猝倒病分别减少99.5％、92.2％和43.8％。其中均以敌克松同Fo60菌粉联合防治最好。
Isolation and culture of the seedling tissue confirmed that the seedling damping-off disease pathogen, Rhizoctonia solani accounted for 59.7%, Fusarium spp. 38.9%, Pythium spp. 1.4%. The resistance of Dexon to Trichoderma harzianum (Fo60) indoors showed that the Fo60 was extremely tolerant to Dictyostella xylostella. The field plot test showed that, compared with the control, the Doxone 4 Three days after the application of Fo60 powder 50 grams, only 50 grams of fungus powder and only grams of fleece-jam 4 grams, three kinds of pathogen-induced fir seedling damping-off were reduced by 71.1%, 53.4%, 43.8% .solani caused a decrease of 99.5%, 92.2% and 43.8% in the seedling damping-off disease. Which are the best combination of anti-Fo60 powder with powder prevention and control.