Journal of Northern Agriculture ›› 2021, Vol. 49 ›› Issue (2): 78-83.doi: 10.12190/j.issn.2096-1197.2021.02.12

• Agroecology environment·Plant protection • Previous Articles     Next Articles

Indoor inhibitory effect of microbial fertilizer on four soil-borne diseases pathogens of potato

ZHAO Yuanzheng1, WANG Dong2, ZHANG Xiangyu3, NIE Fengjie4, PENG Min5, JIANG Jintao6, XU Limin1   

  1. 1. Institute of Plant Protection,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. College of Horticulture and Plant Protection,Inner Mongolia Agricultrual University,Hohhot 010011,China;
    3. Ulanqab Plant Protection and Inspection Station,Jining 012000,China;
    4. Centre of Agricultural Biotechnology,Ningxia Academy of Agricultural and Forestry Sciences,Yinchuan 750002,China;
    5. Yuan Tai Fung(Baotou)Biotechnology Co., Ltd., Salaqi 014100,China;
    6. Inner Mongolia Zhicheng IOT Co., Ltd., Jining 012000,China
  • Received:2020-10-16 Online:2021-04-20 Published:2021-06-21

Abstract: 【Objective】To determine the indoor inhibitory effect of the tested microbial fertilizers on the four soil-borne disease pathogens of potato(Streptomyces galilaeus,Verticillium dahliae,Fusarium oxysporum and Rhizoctonia solani).【Methods】By the method of mycelial growth rate,the inhibitory effect of four soil-borne disease pathogens of potato treated with different concentrations of microbial fertilizer(50,100,1 000 mg/L)was determined,and the effect of microbial fertilizer on the 4 pathogens toxicity was determined.【Results】The inhibition ratio of same pathogen was improved with the increase of concentration of microbial fertilizer;the greatest inhibitory effect showed when four pathogens treated with 1 000 mg/L microbial fertilizer,and the inhibition ratio of Streptomyces galilaeus and Verticillium dahliae were 97.44% and 85.01%,the inhibition ratio of Fusarium oxysporum and Rhizoctonia solani were 76.62% and 32.07%. The microbial fertilizer showed different toxicity effects on 4 pathogens,EC50 of Verticillium dahliae and Streptomyces galilaeus were smaller and were 18.251 mg/L and 41.461 mg/L;EC50 of Fusarium oxysporum was 140.939 mg/L,while EC50 of Rhizoctonia solani was the biggest(18 632.649 mg/L).【Conclusion】The tested microbial fertilizer had a strong inhibitory effect and toxicity against Verticillium dahliae and Streptomyces galilaeus,and has a certain inhibitory effect and toxicity against Fusarium oxysporum,but it has a lesser inhibitory effect and toxicity against Rhizoctonia solani.

Key words: Potato, Pathogen, Microbial fertilizer, Inhibition ratio, Toxicity

CLC Number: 

  • S532