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
As a case study to document the current characteristics of cassava mosaic virus disease (CMD) in post epidemic areas, surveys were carried out, in 2003 and2004, in Siaya District of western Kenya. This was an area affected by a severe CMD pandemic in the late 1990s. Data recorded on cassava varie...
Mallowa, S.
,
Isutsa, D.
,
Kamau, A.
,
Obonyo, R.
,
Legg, J.P.
,
[Current characteristics of cassava mosaic in postepidemic areas increase the range of possible management options]
,
Current characteristics of cassava mosaic in postepidemic areas increase the range of possible management options
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, Pheneas
,
Okao-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 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
Parasitism rates of Bemisia tabaci(Gennadius) and searching and oviposition behaviours of its parasitoid Eretmocerus mundus Mercet were compared on two cassava varieties: a glabrous variety, Nase 4 and a hirsute variety, MM970245 withc.88 leaf hairscm2. Parasitism was assessed after potted plants...
Otim, M.
,
Kyalo, G.
,
Kyamanywa, S.
,
Asiimwe, P.
,
Legg, J.P.
,
Guershon, M
,
Gerling, D.
,
[Parasitism of Bemisia tabaci (Homoptera: aleyrodidae) by Eretmocerus mundus (Hymenoptera: aphelinidae) on cassava]
,
Parasitism of Bemisia tabaci (Homoptera: aleyrodidae) by Eretmocerus mundus (Hymenoptera: aphelinidae) on cassava
Wosula, Everlyne N.
,
Evans, G.A.
,
Issa, K.A.
,
Legg, J.P.
,
[Two new invasive whiteflies (Hemiptera: Aleyrodidae) to Tanzania]
,
Two new invasive whiteflies (Hemiptera: Aleyrodidae) to Tanzania
Mkamilo, G.S.
,
Ndyetabula, I.L.
,
Jeremiah, S.C.
,
Merumba, S.M.
,
Kibura, J.
,
Karugaba, R.K
,
Chirimi, 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
A study compared the spread of sweet potato virus disease (SPVD) into crops of two moderately resistant and initially SPVD-free sweet potato cultivars in northern and southern Mpigi, Uganda. Whiteflies, the vector of sweet potato chlorotic stunt crini virus (SPCSV), a component cause of SPVD, wer...
Aritua, Valentine
,
Legg, J.P.
,
Smit, N.E.
,
Gibson, R.W.
,
[Effect of local inoculum on the spread of sweetpotato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweetpotato cultivar]
,
Effect of local inoculum on the spread of sweetpotato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweetpotato cultivar
Cassava brown streak disease (CBSD) has been a problem in Tanzania since 1936. Existing literature indicated limited distribution of the disease to low altitudes, usually <100 m above sea level, but the current geographical distribution of the disease was not known. Whether a single or many strai...
Rwegasira, G.M.
,
Momanyi, G.
,
Rey, M.E.C.
,
Kahwa, G.
,
Legg, J.P.
,
[Widespread occurrence and diversity of cassava brown streak virus (Potyviridae:Ipomovirus) in Tanzania]
,
Widespread occurrence and diversity of cassava brown streak virus (Potyviridae:Ipomovirus) in Tanzania