文献类型： 外文期刊

作者： Chittarath, Khonesavanh ¹ ; Chung Huy Nguyen ² ; Bailey, Wendy C. ³ ; Zheng, Si-Jun ⁴ ; Mostert, Diane ³ ; Viljoen, Altus ³ ; Tazuba, Anthony Fredrick ⁶ ; Ocimati, Walter ⁶ ; Kearsley, Elizabeth ⁷ ; Tran Yen Chi ⁸ ; Nguyen Thi Tho ² ; Nguyen Tien Hung ² ; Dita, Miguel ⁹ ; Shah, Trushar ¹⁰ ; Karanja, Margaret ¹⁰ ; Mahuku, George ¹¹ ; Blomme, Guy ¹² ;

作者机构： 1.Minist Agr & Forestry, Dept Agr, Plant Protect Ctr, Viangchan 01001, Laos

2.Plant Protect Res Inst, Hanoi 119000, Vietnam

3.Stellenbosch Univ, Dept Plant Pathol, ZA-7602 Stellenbosch, South Africa

4.Yunnan Acad Agr Sci, Agr Environm & Resources Inst, Yunnan Key Lab Green Prevent & Control Agr Transb, Kunming 650205, Yunnan, Peoples R China

5.Alliance Biovers & CIAT, Kunming 650205, Yunnan, Peoples R China

6.Alliance Biovers & CIAT, POB 24384, Kampala, Uganda

7.BlueGreen Labs, B-9120 Melsele, Belgium

8.Plant Protect Dept, 149 Ho Dac Di, Hanoi 115000, Vietnam

9.Alliance Biovers & CIAT, Cali 763537, Colombia

10.IITA, POB 30709-00100, Nairobi, Kenya

11.IITA, POB 7878, Kampala, Uganda

12.Alliance Biovers & CIAT, POB 5689, Addis Ababa, Ethiopia

关键词： Cavendish; field survey; Fusarium TR4; Greater Mekong Subregion; ;Pisang Awak'

期刊名称：JOURNAL OF FUNGI （ 影响因子：4.7； 五年影响因子：5.2 ）

ISSN：

年卷期： 2022 年 8 卷 1 期

页码：

收录情况： SCI

摘要： Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to global banana production. The tropical race 4 (TR4) variant of Foc is a highly virulent form with a large host range, and severely affects Cavendish bananas. Foc TR4 was recently observed within the Greater Mekong Subregion, after Chinese private companies expanded Cavendish production to the region. In this study, extensive surveys conducted across Laos and Vietnam show that Foc TR4 is still mainly constricted to the northern regions of these countries and is limited to Cavendish cultivation settings. In Laos, Foc TR4 is associated with large-scale Cavendish plantations owned by or involved with Chinese companies through which infected planting material could have been imported. In Vietnam, mostly small-holder Cavendish farmers and backyard gardens were affected by Foc TR4. In Vietnam, no direct link is found with Chinese growers, and it is expected the pathogen mainly spreads through local and regional movement of infected planting materials. Foc TR4 was not recorded on banana cultivars other than Cavendish. The extensively cultivated `Pisang Awak' cultivar was solely infected by VCGs belonging to Foc race 1 and 2, with a high occurrence of VCG 0123 across Laos, and of VCG 0124/5 in Vietnam. Substantial diversity of Foc VCGs was recorded (VCGs 0123, 0124/5, 01218 and 01221) from northern to southern regions in both countries, suggesting that Fusarium wilt is well established in the region. Interviews with farmers indicated that the local knowledge of Fusarium wilt epidemiology and options for disease management was limited. Clear communication efforts on disease epidemiology and management with emphasis on biosecurity practices need to be improved in order to prevent further spread of Foc TR4 to mixed variety smallholder settings.