Severity of Viral Diseases and Types of Weeds as Alternative Viral Hosts in &lt;em&gt;Dioscorea&lt;/em&gt; Fields in Southern Guinea Savannah Agroecology of Nigeria

Aliyu, Taiye Hussein; Takim, F. O.; Olatinwo, Latifat Kehinde; Arogundade, Olawale; Omotesho, Kemi Funmilayo; Oladoja, D. A.

doi:10.4038/jfa.v14i2.5242

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Nevertheless, we found that YMMV can infect several annual weed species that are widespread in yam fields in Guadeloupe and that may play a significant role in the epidemiology of YMMV, considering that Aphis craccivora, an aphid vector of YMMV [48], is polyphagous and could spread YMMV to a wide range of host plants, including yams. Our results add to the previous identification of several weed reservoirs of YMV in yam fields in Nigeria [74,75]. Conventional wisdom holds that the use of pesticides reduces the incidence of viral diseases by negatively affecting vector transmission.…”

Section: Role Of Cropping Practices and Weeds In The Epidemiology Of ...supporting

confidence: 80%

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Diouf

Guyader

Gaspard

et al. 2022

Viruses

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The epidemiology of yam viruses remains largely unexplored. We present a large-scale epidemiological study of yam viruses in Guadeloupe based on the analysis of 1124 leaf samples collected from yams and weeds. We addressed the prevalence of cucumber mosaic virus (CMV), Cordyline virus 1 (CoV1), Dioscorea mosaic associated virus (DMaV), yam asymptomatic virus 1 (YaV1), yam mosaic virus (YMV), yam mild mosaic virus (YMMV), badnaviruses, macluraviruses and potexviruses, and the key epidemiological drivers of these viruses. We provide evidence that several weeds are reservoirs of YMMV and that YMMV isolates infecting weeds cluster together with those infecting yams, pointing to the role of weeds in the epidemiology of YMMV. We report the occurrence of yam chlorotic necrosis virus (YCNV) in Guadeloupe, the introduction of YMMV isolates through the importation of yam tubers, and the absence of vertical transmission of YaV1. We identified specific effects on some cropping practices, such as weed management and the use of chemical pesticides, on the occurrence of a few viruses, but no crop-related factor had a strong or general effect on the overall epidemiology of the targeted viruses. Overall, our work provides insights into the epidemiology of yam viruses that will help design more efficient control strategies.

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Section: Role Of Cropping Practices and Weeds In The Epidemiology Of ...supporting

confidence: 80%

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Diouf

Guyader

Gaspard

et al. 2022

Viruses

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“…The possible role of weeds as reservoirs and the impact of farming practices on the epidemiology of yam viruses has not been extensively addressed either [113], although these factors could be significant levers for controlling these viruses through better weed management and/or the use of clean seeds [114,115]. In fact, the sustainable control of yam viruses would be best achieved by combining several approaches, such as frequent seed renewal (using virus-free seed), weed control (mulching, weeding), and/or control of vector populations.…”

Section: Epidemiology: Transmission Reservoir Plants and Cultural Pra...mentioning

confidence: 99%

Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Diouf

Festus

Silva

et al. 2022

Viruses

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Viruses are a major constraint for yam production worldwide. They hamper the conservation, movement, and exchange of yam germplasm and are a threat to food security in tropical and subtropical areas of Africa and the Pacific where yam is a staple food and a source of income. However, the biology and impact of yam viruses remains largely unknown. This review summarizes current knowledge on yam viruses and emphasizes gaps that exist in the knowledge of the biology of these viruses, their diagnosis, and their impact on production. It provides essential information to inform the implementation of more effective virus control strategies.

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Oldenlandia herbacea

Ventosa-Febles¹

2022

CABI Compendium

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Severity of Viral Diseases and Types of Weeds as Alternative Viral Hosts in <em>Dioscorea</em> Fields in Southern Guinea Savannah Agroecology of Nigeria

Cited by 3 publications

References 10 publications

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Epidemiology of Yam Viruses in Guadeloupe: Role of Cropping Practices and Seed-Tuber Supply

Viruses of Yams (Dioscorea spp.): Current Gaps in Knowledge and Future Research Directions to Improve Disease Management

Oldenlandia herbacea

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