Descubre y comparte nuestro conocimiento público

Se han encontrado 586 recursos

Resultados de búsqueda

Mhone, A.Sandifolo, V.Jumbo, S.Mwale, C.Gondwe, F.M.T.Moyo, C.Mahungu, N.M.[Chitipi farms in Malawi: a success story of cassava in the state sector]Chitipi farms in Malawi: a success story of cassava in the state sector

Fifteen cassava (Manihot esculentaCrantz) genotypes were grown at two field sites of Nigeria from 1994 to 1996 (Ibadan: 28±5°C, altitude 210 masl and Jos: 18±5°C, altitude of 1260 masl) to evaluate the use of chlorophyll fluorescence in screening for cold tolerance in cassava. At 12 months after ...


Togun, A.O.Akparobi, S.O.Ekanayake, I.J.[Field studies on chlorophyll a fluorescence for low temperature tolerance testing of cassava (Manihot esculenta Crantz)]Field studies on chlorophyll a fluorescence for low temperature tolerance testing of cassava (Manihot esculenta Crantz)

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

Cassava brown streak disease (CBSD) is the most important virus disease of cassava and a major food security threat in Africa. Yearly economic losses of up to $100 million USD have been attributed to CBSD. The lack of information on plant-virus interactions has restricted progress in breeding for...


Shirima, R.R.Maeda, D.GKanju, E.Ceasar, G.Tibazarwa, F.I.Legg, J.P.[Absolute quantification of cassava brown streak virus mRNA by real-time qPCR]Absolute quantification of cassava brown streak virus mRNA by real-time qPCR

Since its accidental introduction into Africa, the cassava mealybug (CM) has spread to about 25 countries. The specific parasitoid Epidinocarsis lopezi, introduced from South America, its area of origin, into Nigeria in 1981, has since been released in more than 50 sites. By the end of 1986 it wa...


Neuenschwander, P.Herren, H.R.Harpaz, I.Badulescu, D.Akingbohungbe, A.E.[Biological control of the cassava mealybug, Phenacoccus manihoti, by the exotic parasitoid Epidinocarsis lopezi in Africa [and Discussion]]Biological control of the cassava mealybug, Phenacoccus manihoti, by the exotic parasitoid Epidinocarsis lopezi in Africa [and Discussion]

The success of inland valley crop production in humid and subhumid areas of subSaharan Africa depends on the availability of appropriate crop varieties with some tolerance to excess moisture. Performance of upland crop associations [cassava (Manihot esculenta) + sweet potato (Ipomoea batatas) and...


Carsky, R.J.Walker, P.Hauser, S.Dashiell, Kenton E.Dixon, A.[Response of selected crop associations to groundwater table depth in an inland valley]Response of selected crop associations to groundwater table depth in an inland valley

In a survey for cassava mosaic begomoviruses conducted in 1997 and 1998 in Nigeria, East African cassava mosaic virus (EACMV) was detected by the polymerase chain reaction together with African cassava mosaic virus (ACMV) in 27 out of 290 cassava leaf samples of infected plants from 254 farmers' ...


Ogbe, F.O.Thottappilly, G.Dixon, Alfred G.O.Atiri, G.I.Mignouna, H.D.[Variants of East African cassava mosaic virus and its distribution in double infections with African cassava mosaic virus in Nigeria]Variants of East African cassava mosaic virus and its distribution in double infections with African cassava mosaic virus in Nigeria

Surveys were carried out in Zambia twice yearly from 1986 to 1990, to assess the impact of a biological control campaign against the cassava mealybug (CM), Phenacoccus manihoti Mat.-Ferr., throughout the infested area. From 1984 onward, the exotic parasitoid Epidinocarsis lopezi (De Santis) (Hym....


Chakupurakal, J.Markham, R.H.Neuenschwander, P.Sakala, M.Malambo, C.Mulwanda, D.Banda, E.Chalabesa, A.Bird, T.Haug, T.M.[Biological control of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zambia]Biological control of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in Zambia

Chloroplast DNA (cp) and nuclear ribosomal DNA (rDNA) variation was investigated in 45 accessions of cultivated and wild Manihot species. Ten independent mutations, 8 point mutations and 2 length mutations were identified, using eight restriction enzymes and 12 heterologous cpDNA probes from mung...


Fregene, Martin A.Vargas, J.Ikea, J.Angel, F.Thome, J.Asiedu, RobertAkoroda, M.O.Roca, W.[Variability of chloroplast DNA and nuclear ribosomal DNA in cassava (Manihot esculenta Crantz) and its wild relatives]Variability of chloroplast DNA and nuclear ribosomal DNA in cassava (Manihot esculenta Crantz) and its wild relatives

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso