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Field surveys in many cassava growing areas of Africa have assessed the incidence and severity of cassava mosaic disease (CMD), populations of the whitefly vector (Bemisia tabaci), and the distribution of cassava mosaic begomoviruses (CMBs). The methods employed differ greatly between countries a...


Sseruwagi, P.Sserubombwe, W.S.Legg, J.P.Ndunguru, J.Thresh, J.M.[Methods of surveying the incidence and severity of cassava mosaic disease and whitefly vector populations on cassava in Africa: a review]Methods of surveying the incidence and severity of cassava mosaic disease and whitefly vector populations on cassava in Africa: a review
Autor: Legg, J.P.

During the 1990s, an epidemic of an unusually severe form of cassava mosaic virus disease (CMD) has expanded to cover virtually all of Uganda, and substantial areas in the neighbouring countries of Kenya, Tanzania, Sudan and the Democratic Republic of Congo. Losses in the generally sensitive loca...


Legg, J.P.[Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa]Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa

Cassava is infected by numerous geminiviruses in Africa and India that cause devastating losses to poor farmers. We here describe the molecular diversity of seven representative cassava mosaic geminiviruses (CMGs) infecting cassava from multiple locations in Tanzania. We report for the first time...


Ndunguru, J.Legg, J.P.Aveling, T.Thompson, G.Fauquet, Claude M.[Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses]Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses
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

Cassava mosaic disease (CMD) is the major production constraint on cassava ( Manihot esculenta ) in Angola. Previous reports derived from single samples recorded the presence of African cassava mosaic virus (ACMV) and East African cassava mosaic virus (EACMV) in Angola. Regional CMD monitoring in...


Lava Kumar, P.Akinbade, S.A.Dixon, Alfred G.O.Mahungu, N.M.Mutunda, M.P.Kiala, D.Londa, L.Legg, J.P.[First report of the occurrence of East African cassava mosaic virusUganda (EACMVUG) in Angola]First report of the occurrence of East African cassava mosaic virusUganda (EACMVUG) in Angola

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
Autor: Legg, J.P.

The ecology of the Bemisia tabaci/cassava/African cassava mosaic virus (ACMV) pathosystem is reviewed briefly with special attention given to the parameters affecting the pattern of population development of B. tabaci. Significant gaps in our understanding of this system remain, particularly conc...


Legg, J.P.[Bemisia tabaci: the whitefly vector of cassava mosaic geminiviruses in Africa: an ecological perspective]Bemisia tabaci: the whitefly vector of cassava mosaic geminiviruses in Africa: an ecological perspective
Mkamilo, G.S.Ndyetabula, I.L.Jeremiah, S.C.Merumba, S.M.Kibura, J.Karugaba, R.KChirimi, B.Bagambisa, C.Milala, P.Chuwa, C.Ngendello, T.Legg, J.P.Kanju, E.E.Ntawuruhunga, Pheneas[Recently released cassava varieties in the lake zone of Tanzania]Recently released cassava varieties in the lake zone of Tanzania

Bemisia tabaci threatens production of cassava in Africa through vectoring viruses that cause cassava mosaic disease (CMD) and cassava brown streak disease (CBSD). B. tabaci sampled from cassava in eight countries in Africa were genotyped using NextRAD sequencing, and their phylogeny and populati...


Wosula, Everlyne N.Chen, W.Fei, Z.Legg, J.P.[Unravelling the genetic diversity among cassava Bemisia tabaci whiteflies using NextRAD Sequencing]Unravelling the genetic diversity among cassava Bemisia tabaci whiteflies using NextRAD Sequencing

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