Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (10): 69-78.doi: 10.11924/j.issn.1000-6850.casb2022-0250

Special Issue: 园艺

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Trichoderma: Effects on Microbial Diversity in Rhizosphere and Roots of Cutting-rose and Control Effects on Downy Mildew

WANG Lihua1(), YANG Xiumei1, ZHANG Yiping1, XU Feng1, WANG Jihua1(), WU Xuewei2()   

  1. 1 Flower Research Institute, Yunnan Academy of Agricultural Sciences/ Yunnan Key Laboratory for Flower Breeding/ National Engineering Research Center for Ornamental Horticulture, Kunming 650205
    2 Yunnan University, Kunming 650504
  • Received:2022-04-02 Revised:2022-09-27 Online:2023-04-05 Published:2023-03-27

Abstract:

To explore the prevention and control effect of biological fungus Trichoderma on the diseases of cutting-rose, 300 times Trichoderma wettable powder was used at the seedling stage of cutting-rose. The results showed that Trichoderma could promote and enrich the distribution of fungal species in the rhizosphere and roots of rose, and had a great impact on the diversity of fungi and microorganisms in the soil. The number of OTU increased, and the rhizosphere fungal indexes, namely Shannon, Simpson and PD indexes, were higher than those of the control and chemical agent thiophanate methyl treatment, indicating that Trichoderma could enrich the species of soil fungi and increase the abundance of some beneficial bacteria. From the perspective of the control effect on rose downy mildew, 300 times of Trichoderma and 800 times of 50% thiophanate methyl showed significant differences compared with the control. The disease prevention and treatment effect of Trichoderma was 87.35%, which was slightly higher than that of chemical agent thiophanate methyl.

Key words: Trichoderma, cutting-rose, microbial diversity, downy mildew, control effects