[ Objective] Tlie aim was to study the pathogenic ability and biocontrol effect of different pathogens to potato plants. [ Method] The pathogenic ability of Rhizoctnnia solani soybean and Rhizoctonw solani rice to potato plants were studied by using living body vaccination bacteria method, and then the effects of biological control bacteria to disease were also investigated by spraying bio-control bacteria to disease. [Result] Rhizoctonia solani soybean had stronger pathogenic ability to potato plant than Rhizoctonia solani rice, among them the disease indexes of Rhizoc-tonia solani rice to leaf and stem of potato were only 25% and 50% , respectively. Bacteria had certain control effect to Rhizoctonia solani soybean, and the inhibitory rate reached 88%. Meanwhile the mixed bacteria and actinomycete had obvious bio-control effect to Rhizoctonia solani soybean, and the inhibitory rale reached 90%. [ Conclusion ] The research provides theoretical basis for the cultivation of potato and the control of Phyllachora graminis.%[目的]探讨不同来源丝核菌对马铃薯植株的致病能力及不同拮抗菌对病害的防治效果.[方法]采用活体接菌法研究了大豆根病病立枯丝核菌和水稻纹枯病立枯丝核菌对不同品种马铃薯植株的致病能力,并通过喷施生防菌研究了不同拮抗菌(细菌、放线菌和霉菌)对病害的防治效果.[结果]大豆根腐病立枯丝核菌对马铃薯植株的致病能力强于水稻纹枯病立枯丝核菌,其中水稻纹枯病立枯丝核菌对马铃薯叶的病指仅为25％,对茎的病指为50％.细菌对大豆根腐病立枯丝核菌具有一定的防治效果,抑菌率可达88％；细菌与放线菌的混合液对大豆根腐病立枯丝核菌的生防作用较明显,抑菌率达90％.[结论]为马铃薯栽培及黑痣病防治提供了理论依据.
展开▼
