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journal1 ›› 2018, Vol. 34 ›› Issue (3): 449-460.DOI: 10.16409/j.cnki.2095-039x.2018.03.015

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Trichoderma brevicompactum BF06, a novel strain with potential for biocontrol of soil-borne diseases and promotion of plant growth of cucumber

LI Jinyi1, LU Caige2, LIU Ting2, LIU Weicheng2, SU Haijia1   

  1. 1. College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
    2. Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
  • Received:2017-10-18 Online:2018-06-08 Published:2018-06-14

Abstract: Soil-borne diseases of cucumber have become the most important factor limiting cucumber production in China as a consequence of continuous cropping. These diseases are difficult to control by chemical and agricultural measures, and biocontrol is a desirable alternative strategy. Trichoderma brevicompactum strain BF06 isolated from forest soil exhibited strong antagonistic activity against five soil-borne phytopathogenic pathogens:Fusarium oxysporum f. sp. cucumerinum, Rhizoctonia solani, Sclerotinia sclerotiorum, F. solani f. sp. cucurbitae, and Phytophthora cryptogea that cause cucumber fusarium wilt, basal stem rot, sclerotinia rot, root rot, and phytophthora blight, respectively. Greenhouse experiments indicated that control effects of BF06 on the five cucumber root diseases exceeded 60%; notably, up to 90.4 and 88.8% on cucumber fusarium wilt and basal stem rot, respectively. In addition, BF06 improved plant growth by increasing the length of lateral shoots and number of lateral roots. Our results indicated that T. brevicompactum is a novel resource of potential biocontrol agents for effectively controlling cucumber root diseases caused by soil-borne pathogens.

Key words: Trichoderma brevicompactum, antagonism, cucumber, soil-borne pathogens, plant growth regulation

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