Entomopathogenic fungi decrease Rhizoctonia disease in potato in field conditions

PeerJ

article

Oksana G. Tomilova¹  Elena M. Shaldyaeva¹  Natalia A. Kryukova¹  Yulia V. Pilipova²  Natalia S. Schmidt¹  Viktor P. Danilov³  Vadim Y. Kryukov¹  Viktor V. Glupov¹ 

[1] Institute of Systematics and Ecology of Animals SB RAS;Department of Plant Protection, Novosibirsk State Agrarian University;Federal Scientific Centre of Agro-BioTechnologies

关键词: Rhizoctonia solani;    Metarhizium robertsii;    Beauveria bassiana;    Endophyte;    Antagonism;    Peroxidase;    Biocontrol;    Siberia;    Yield;   

DOI  :  10.7717/peerj.9895

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Rhizoctonia potato disease is widespread in the world and causes substantial yield and quality losses in potato. This study aimed to evaluate the efficacy of entomopathogenic fungi Metarhizium robertsii and Beauveria bassiana in the inhibition of potato Rhizoctonia complex disease. The efficacy of the entomopathogenic fungi M. robertsii and B. bassiana in the defense of potato against Rhizoctonia disease (stem cancer, black scrulf and other forms of manifestation on tubers) was estimated under field conditions in Western Siberia. Preplanting treatment of the tubers with B. bassiana decreased Rhizoctonia disease in the stems and stolons. At the same time, treatment with M. robertsii did not cause a decrease in Rhizoctonia disease in these organs. However, both fungi decreased the sclerotium index on the tubers of new crops. We demonstrated two mechanisms of inhibition of Rhizoctonia solani by M. robertsii and B. bassiana, including (1) direct effect, expressed as inhibition of R. solani sclerotium formation in cocultivation assays, and (2) indirect effect, which is associated with increased peroxidase activity in potato roots under the influence of colonization by entomopathogenic fungi. We suggest that the treatment of seed tubers with B. basiana can effectively manage Rhizoctonia disease during the plant vegetative season and that both fungi significantly improve the quality of the new tuber crop.

【 授权许可】

CC BY