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Legg, J.P.Owor, B.Sseruwagi, P.Ndunguru, J.[Cassava mosaic virus disease in East and Central Africa: epidemiology and management of a regional pandemic]Cassava mosaic virus disease in East and Central Africa: epidemiology and management of a regional pandemic

Diagnostic surveys were conducted in 2002 and 2003 in order to provide a comprehensive and detailed assessment of the status of cassava mosaic disease (CMD) in the Republic of Congo (ROC) and to determine if the disease was spreading. In 2002, 105 farmers’ fields were assessed in the four major c...


Ntawuruhunga, PheneasOkao-Okuja, G.Bembe, A.Obambi, M.Armand Mvila, J.C.Legg, J.P.[Incidence and severity of cassava mosaic disease in the Republic of Congo]Incidence and severity of cassava mosaic disease in the Republic of Congo

The sweetpotato whitefly, Bemisia tabaci (Gennadius) is the vector of the cassava mosaic geminiviruses (CMGs) that cause cassava mosaic disease (CMD). Synergistic interactions between B. tabaci and CMGs have been hypothesized as a cause of whitefly “super-abundance,” which has been a key factor b...


Boni, S.B.Rugumamu, C.P.Gerling, D.Nokoe, K.S.Legg, J.P.[Interactions Between Cassava Mosaic Geminiviruses and Their Vector, Bemisia tabaci (Hemiptera: Aleyrodidae)]Interactions Between Cassava Mosaic Geminiviruses and Their Vector, Bemisia tabaci (Hemiptera: Aleyrodidae)

Cassava mosaic disease (CMD) caused by cassava mosaic geminiviruses (CMGs) (Geminiviridae:Begomovirus) is undoubtedly the most important constraint to the production of cassava in Africa at the outset of the 21st century. Although the disease was recorded for the first time in the latter part of ...


Legg, J.P.Fauquet, Claude M.[Cassava mosaic geminiviruses in Africa]Cassava mosaic geminiviruses in Africa

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...


Mulenga, R.M.Legg, J.P.Ndunguru, J.Miano, D.W.Mutitu, E.W.Chikoti, Patrick ChizaAlabi, O.J.[Survey, molecular detection and characterization of geminiviruses associated with cassava mosaic disease in Zambia]Survey, molecular detection and characterization of geminiviruses associated with cassava mosaic disease in Zambia

A study was carried out to assess the effect of different cassava mosaic geminiviruses (CMGs) occurring in Uganda on the growth and yield of the susceptible local cultivar ‘Ebwanateraka’. Plants infected with African cassava mosaic virus (ACMV), ‘mild’ and ‘severe’ strains of East African cassava...


Owor, B.Legg, J.P.Okao‐Okuja, G.Obonyo, R.Ogenga‐Latigo, M.W.[The effect of cassava mosaic geminiviruses on symptom severity, growth and root yield of a cassava mosaic virus diseasesusceptible cultivar in Uganda]The effect of cassava mosaic geminiviruses on symptom severity, growth and root yield of a cassava mosaic virus diseasesusceptible cultivar in Uganda

Management of geminiviruses is a worldwide challenge because of the widespread distribution of economically important diseases caused by these viruses. Regardless of the type of agriculture, management is most effective with an integrated pest management (IPM) approach that involves measures befo...


Rojas, M.R.Macedo, M.A.Maliano, M.R.Soto-Aguilar, M.Souza, J.O.Briddon, R.W.Kenyon, L.Bustamante, R.F.R.Zerbini, F.M.Adkins, S.Legg, J.P.Kvarnheden, A.Wintermantel, William M.Sudarshana, M.R.Peterschmitt, M.Lapidot, M.Martin, D.P.Moriones, E.Inoue-Nagata, A.K.Gilbertson, R.L.[World management of geminiviruses]World management of geminiviruses

During the 1990s, an epidemic of cassava mosaic virus disease caused major losses to cassava production in Uganda. Two factors associated with the epidemic were the occurrence of a novel recombinant begomovirus, EACMV-Ug, and unusually high populations of the whitefly vector, Bemisia tabaci. Here...


Legg, J.P.French, R.Rogan, D.Okao‐Okuja, G.Brown, J.[A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda]A distinct Bemisia tabaci (Gennadius) (Hemiptera: Sternorrhyncha: Aleyrodidae) genotype cluster is associated with the epidemic of severe cassava mosaic virus disease in Uganda

Cassava mosaic disease (CMD), arguably Africa's greatest plant protection problem, has been known to occur in central/West Africa for more than 70 years. There is, however, no published record of the occurrence of CMD or the cassava mosaic geminiviruses (CMGs) that cause it from the central Afric...


Legg, J.P.Ndjelassili, F.Okao-Okuja, G.[First report of cassava mosaic disease and cassava mosaic geminiviruses in Gabon]First report of cassava mosaic disease and cassava mosaic geminiviruses in Gabon

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