Cassava mosaic disease (CMD), recognized in Africa for more than a century, is now known to be caused by a group of geminiviruses in the genus Begomovirus from the family Geminiviridae. All are transmitted in a persistent manner by the whitefly vector, Bemisia tabaci. Structurally, cassava mosaic...
Cassava viruses are the major biotic constraint to cassava production in Africa. Community-wide action to manage them has not been attempted since a successful cassava mosaic disease control programme in the 1930s/40 s in Uganda. A pilot initiative to investigate the effectiveness of community ph...
Legg, J.P.
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Ndalahwa, M.
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Yabeja, J.
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Ndyetabula, I.
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Bouwmeester, H.J.
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Shirima, R.
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Mtunda, K.
,
[Community phytosanitation to manage cassava brown streak disease]
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Community phytosanitation to manage cassava brown streak disease
A survey was conducted from April to May 2014 in 214 farmers’ fields located across six major cassava-producing provinces (Western, Northwestern, Northern, Luapula, Lusaka, and Eastern) of Zambia to determine the status of cassava mosaic disease (CMD) and the species diversity of associated cassa...
The Ipomovirus genus in the family Potyviridae contains five species: Sweet potato mild mottle virus (SPMMV), Squash vein yellowing virus (SqVYV), Cucumber vein yellowing virus (CVYV), Cassava brown streak virus (CBSV), and Ugandan cassava brown streak virus (UCBSV). Sequencing and analysis of To...
Although cassava shows resilience against a myriad of pests and diseases, including several of viral aetiology, two virus disease complexes, cassava brown streak disease and cassava mosaic disease (CMD), are the major yield-limiting biotic constraints to its production in sub-Sahara Africa. Subse...
Cassava mosaic disease (CMD), now known to be caused by cassava mosaic geminiviruses (Family Geminiviridae; Genus Begomovirus), was first reported in East Africa in 1894. Epidemics occurred in Madagascar and Uganda in the 1930s and 1940s, and more localised rapid spread of CMD was observed in par...
Legg, J.P.
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Thresh, J.M.
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[Cassava mosaic virus disease in East Africa: a dynamic disease in a changing environment]
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Cassava mosaic virus disease in East Africa: a dynamic disease in a changing environment
Cassava is the third largest source of carbohydrates for human food in the world but is vulnerable to virus diseases, which threaten to destabilize food security in sub-Saharan Africa. Novel methods of cassava disease detection are needed to support improved
control which will prevent this crisis...
Ramcharan, A.
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Baranowski, K.
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McCloskey, P.
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Ahmed, B.
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Legg, J.P.
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Hughes, D.P.
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[Deep learning for image-based cassava disease detection]
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Deep learning for image-based cassava disease detection