作　　者： ; ; ; ; ;

机构地区： 华南农业大学资源环境学院农药与化学生物学教育部重点实验室

出　　处： 《安徽农业科学》 2008年第10期4170-4172,4174,共4页

摘　　要： [目的]为提高木霉菌的生物防治效果。[方法]研究了哈茨木霉T2菌株对3种病原真菌(齐整小核菌、立枯丝核菌和香蕉枯萎病菌)的抑制作用,分析其对7种杀菌剂的耐药性,并探讨了哈茨木霉T2菌株与杀菌剂联用对立枯丝核菌和齐整小核菌的抑制作用。[结果]哈茨木霉T2菌株对病原真菌的抑制随处理时间的延长而增强。处理后120 h其对齐整小核菌、立枯丝核菌、香蕉枯萎病菌的抑制率最高,分别为63.10%、65.64%和33.84%。哈茨木霉T2菌株对多菌灵的耐药性最强,EC50为4 345.32 mg/L。在浓度为800 mg/L时多菌灵对哈茨木霉T2菌株的抑制率为13.73%,当浓度在50 mg/L以下时抑菌率几乎为0。哈茨木霉T2菌株对代森锰锌、露星较敏感。[结论]哈茨木霉T2菌株与甲霜灵联用,能明显抑制齐整小核菌、立枯丝核菌的生长。 [Objective] The aim of the research was to enhance the biocontrol effect of Trichoderma. [Method] The inhibitory effects of Trichoderma harzinum T2 strain on 3 kinds of pathogenic fungi （ Sclerotium rolfsii, Rhizoctonia solani and Fusarium oxysporum f. cubense） were studied and its drugresistance to 7 kinds of fungicides were analyzed. And the inhibitory effects of applying T. harzianum T2 strain with fungicide on R. solani and S. rolfsii were discussed. [Result] The inhibition of T. harzianum T2 strain was strengthened with the prolonging of the treatment time. Its inhibitory rates to S. rolfsii, R. solani and F. oxysporum were highest on the 120th h after treatment, being 63.10%, 65.64% and 33.84% resp. The drug-resistance of T. harzianum T2 to carbendazim was strongest with ECho of 4 345.32 mg/L. The inhibitory rate of carbendazim at 8130 mg,/L to T. harzianum T2 strain was 13.73%. When the concn, was below 50 mg/L, its inhibitory rate was near to zero. T. harzianum T2 strain was mere sensitive to mancozeb and Louxing. [Conclusion] Applying T. harzianum T2 strain with metalaxyl could inhibit the growth of S. rolfsii and R. solani obviously.

关 键 词： 哈茨木霉 杀菌剂 耐药性 抑制作用

领　　域： [农业科学] [农业科学]