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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (4): 846-851.DOI: 10.16409/j.cnki.2095-039x.2022.04.001

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Screening of Trichoderma and Their Efficiency Against Sunflower Sclerotinia Rot

CHEN Yurong1,2, CAO Qiulin1, LIAN Hua2, MA Guangshu2, JIANG Xiliang1, LI Mei1   

  1. 1. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
  • Received:2022-06-28 Published:2022-08-11

Abstract: Three Trichoderma strains,T.atroviride N862,T.longibrachiatum N246 and T.harzianum X102,were screened for control of sunflower sclerotinia rot by plate confrontation,detached leaf detection,pot and field trials.The growth inhibition rates of the three Trichoderma strains against S.sclerotiorum,pathogen of sunflower sclerotinia rot,were all over 85%.The inhibition rates of N862,N246 and X102 on the expansion of leaf lesions on detached leaves were 90.6%,96.5% and 63.8%,respectively.Soil amendment followed by plant drenching with Trichoderma spores gave the best control effect against sunflower sclerotinia rot,with the efficacy of over 73% for all the three strains in pot trials,and 67.54%,49.96% and 49.23% by N862,N246 and X102 in field experiments,respectively.N863 showed the highest control effect and all three Trichoderma strains are promising for practical application.

Key words: Trichoderma, sunflower, Sclerotinia sclerotiorum, control efficacy

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