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2021 Volume 34 Issue 2
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LIN Cheng-wei, LIU Jin-long. Biological Control Effects of a Trichoderma Strain Against Several Pathogenic Fungi[J]. PLANT HEALTH AND MEDICINE, 2021, (2): 29-33. doi: 10.13718/j.cnki.zwys.2021.02.007
Citation: LIN Cheng-wei, LIU Jin-long. Biological Control Effects of a Trichoderma Strain Against Several Pathogenic Fungi[J]. PLANT HEALTH AND MEDICINE, 2021, (2): 29-33. doi: 10.13718/j.cnki.zwys.2021.02.007
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Biological Control Effects of a Trichoderma Strain Against Several Pathogenic Fungi

  • Agricultural and Rural Bureau of Guanling Autonomous County of Guizhou Province, Anshun Guizhou 561300, China

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  • Received Date: 04/02/2021

  • MSC: S482.7

  • Trichoderma spp.is a kind of biocontrol fungus. It is necessary to study its biological control mechanism because of its wide range of targets, strong adaptability and good control effect. In this study, a strain of Trichoderma spp. was isolated from the soil of a vegetable field in Guanling county of Guizhou province.Then its antagonistic effects, including competition, hyperparasitism and antibiotics, on six pathogenic fungi were studied by plate confrontation culture, slide confrontation culture and antibiotics culture. The results showed that in competition the Trichoderma strain had the highest inhibitory rate for Exserohilum turcicum(77.01%), followed by Botrytis cinerea(70.23%), and the lowest inhibitory rate for Magnaporthe oryzae(23.80%). The hyperparasitism of the strain to the mycelia of Cercospora zeae-maydis was obvious. In addition, the inhibition rate of the volatile secondary metabolites of the strain to C. zeae-maydis was the highest (70.12%), and the inhibition rate of its non-volatile secondary metabolites to E. turcicum was the highest(66.24%). The above results provide a theoretical basis for the effective application of Trichoderma as an antagonistic agent for biological control of plant diseases.
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Biological Control Effects of a Trichoderma Strain Against Several Pathogenic Fungi

  • Received Date: 04/02/2021

Abstract: Trichoderma spp.is a kind of biocontrol fungus. It is necessary to study its biological control mechanism because of its wide range of targets, strong adaptability and good control effect. In this study, a strain of Trichoderma spp. was isolated from the soil of a vegetable field in Guanling county of Guizhou province.Then its antagonistic effects, including competition, hyperparasitism and antibiotics, on six pathogenic fungi were studied by plate confrontation culture, slide confrontation culture and antibiotics culture. The results showed that in competition the Trichoderma strain had the highest inhibitory rate for Exserohilum turcicum(77.01%), followed by Botrytis cinerea(70.23%), and the lowest inhibitory rate for Magnaporthe oryzae(23.80%). The hyperparasitism of the strain to the mycelia of Cercospora zeae-maydis was obvious. In addition, the inhibition rate of the volatile secondary metabolites of the strain to C. zeae-maydis was the highest (70.12%), and the inhibition rate of its non-volatile secondary metabolites to E. turcicum was the highest(66.24%). The above results provide a theoretical basis for the effective application of Trichoderma as an antagonistic agent for biological control of plant diseases.

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