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作物学 > 作物栽培学与耕作学

 

DOI：10.31220/agriRxiv.2024.00229
声明：预印本系统所发表的论文仅用于最新科研成果的交流与共享，未经同行评议，因此不建议直接应用于指导生产实验。

Spatiotemporal dynamics of Fusarium wilt of banana caused by subtropical race 4.

  • Mariela P. González , 
  • Daniel Winter Heck , 
  • Rhaphael A. Silva , 
  • Alessandro Santos , 
  • Gabriel Alves , 
  • Emerson M. Del Ponte , 
  • Eduardo S. G. Mizubut

  • 1. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 2. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 3. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 4. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 5. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 6. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazil; 

  • 7. Departamento de Fitopatologia Universidade Federal de Vi?osa MG 36570-900 Vi?osa Minas Gerais Brazi; 

  •  

    Abstract: Abstract Historically, Fusarium wilt of banana (FWB) caused by Fusarium oxysporum f. sp. cubense (Foc) has rendered hectares of banana unusable in Central and South America. In 2019, tropical race 4 (TR4), the most virulent race of Foc, was detected in South America and its spread to the main banana producing regions is a matter of time. In this work, knowledge of the spatio-temporal dynamics of FWB caused by subtropical race 4 (SR4) and their relation with environmental features aim at providing background to epidemiologically-based mitigation actions to contain TR4. One banana cv. 'Ma??' (AAB) field was established in 2017 in Minas Gerais, Brazil. Bimonthly assessments of incidence were conducted between 2017 to 2020. Weather variables were also recorded. The spatial pattern was studied using quadrat- and distance-based methods. Temporal analyses were based on epidemiological models fitted to disease progress curves. Average values of weather variables were estimated for intervals of 2-, 4-, 6-, and 8-weeks before a given assessment date seeking for any correlation with FWB incidence and absolute disease progress rate. The first foci were detected six months after planting, randomly distributed in the field. The spatial pattern changed to aggregated when FWB incidence increased (maximum of 43%). The FWB progress curve had a sigmoidal-shape and the Gompertz model provided the best description of the temporal dynamic of FWB. Increases in the rate of progress of FWB were correlated with precipitation four weeks before the evaluation. Mitigation actions based on the spatio-temporal epidemiology of SR4 in highly susceptible cultivars might contribute to prevent total crop losses and the expansion of FWB into non-infested regions.

    Key words: fwb; banana; incidence; caused by; tropical race 4; based o

    提交时间：2024-01-29

    版权声明：作者本人独立拥有该论文的版权，预印本系统仅拥有论文的永久保存权利。任何人未经允许不得重复使用。

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引用格式

Mariela P. González, Daniel Winter Heck, Rhaphael A. Silva, Alessandro Santos, Gabriel Alves, Emerson M. Del Ponte, Eduardo S. G. Mizubut. Spatiotemporal dynamics of Fusarium wilt of banana caused by subtropical race 4.. 2024. agriXiv.2024.00229

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