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The aggravating soil-borne diseases threaten the production of a variety of crops and undermine the sustainable development of agriculture. Streptomyces-based bio-agents have been widely explored as an environmentally safe and economically durable biocontrol resource. However, the biocontrol efficacy and influencing factors require further optimization. [Objective] Here we conducted a meta-analysis to evaluate the efficacy of Streptomyces-based bio-agents in controlling the two common soil-borne diseases and identify the key influencing factors. [Methods] The relevant articles were retrieved from Web of Science and CNKI with the keywords “Streptomyces” and “Fusarium wilt”, “Streptomyces” and “bacterial wilt”, “Streptomyces” and “Fusarium oxysporum”, and “Streptomyces” and “Ralstonia solanacearum (or Pseudomonas solanacearum)”. The articles containing comparable treatment groups (with Streptomyces application) and control groups (without Streptomyces application), disease incidence, sample sizes, and mean values were systematically selected. Finally, 76 articles (113 groups) on Streptomyces-based bio-agents for Fusarium wilt control and 19 articles (28 groups) on those for bacterial wilt control were obtained. [Results] After the application of Streptomyces-based bio-agents, the disease incidence of Fusarium wilt decreased from 75.58% to 24.49% (average control efficacy of 67.60%), and that of bacterial wilt decreased from 73.75% to 19.83% (average control efficacy of 73.11%). The soil density of Streptomyces, the final concentration ratio of Streptomyces to pathogen in soil, and climate types were vital for the biocontrol performance of Streptomyces-based bio-agents. Moreover, Streptomyces at the final concentration of 107 CFU/g demonstrated the best biocontrol performance on both diseases. The biocontrol effect of Streptomyces on Fusarium wilt was better when the final concentration ratio of Streptomyces to pathogen was 1:1, whereas the biocontrol effect on bacterial wilt disease was better when the ratio was 10:1 or 100:1. Notably, Streptomyces demonstrated enhanced biocontrol effects on the both diseases in tropical monsoon climate regions. [Conclusion] The application dose of Streptomyces-based bio-agents in soil-borne disease management should be adjusted according to the species and concentration of the pathogen. In addition, it may be better to apply Streptomyces-based bio-agents in tropical monsoon climate regions.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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