Browsing by Author "Edema, R."
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Characterization and distribution of a Potyvirus associated with passion fruit woodiness disease in Uganda
Ochwo-Ssemakula, M.; Sengooba, T.; Hakiza, J.J.; Adipala, E.; Edema, R.; Redinbaugh, M.G.; Aritua, V.; Winter, S. (The American Phytopathological Society, 2012)This article describes the incidence and etiology of a viral disease of passion fruit in Uganda. Symptoms, including those characteristic of passion fruit woodiness disease (PWD), were observed on 32% of plants in producing ... -
Combining ability of maize inbred lines for performance under low nitrogen and drought stresses
Nyombayire, A.; Edema, R.; Asea, G.; Gibson, P. (African Crop Science Society, 2011)Drought and infertile soils are increasingly the most important stresses affecting maize (Zea mays L.) and causing substantial yield losses in Sub-Saharan Africa. Varieties with improved water use efficiency and/or N would ... -
Development of intermittent drought stress tolerant common bean genotypes in Uganda
Amongi, W.; Nkalubo, S.T.; Ochwo-Ssemakula, M.; Gibson, P.T.; Edema, R. (African Crop Science Society, 2014)Common bean (Phaseolus vulgaris L.) varieties that are high yielding and drought-tolerant are crucial in coping with the effects of drought, that is prevalent among small scale producers living in Uganda. The objective of ... -
Effect of crop protection management practice on yield of seven cowpea varieties in Uganda
Edema, R.; Adipala, E. (Taylor & Francis, 1996)Field experiments were conducted during the first and second rainy seasons of 1994 to evaluate the seed yield potential of two commonly grown cowpea varieties and five introduced lines under different pest and disease ... -
Efficacy of manual seed sorting methods in reduction of transmission of rice and cowpea seed-borne diseases
Kawube, G.; Kanobe, C.; Edema, R.; Tusiime, G.; Mudingotto, P. J.; Adipala, E. (African Crop Science Society, 2005)The production of rice and cow pea in Uganda is increasing in acreage rather than productivity. This is attributed to a number of factors, mainly seed-borne diseases. The farmers in Uganda mainly use farm saved seeds for ... -
Feasibilty of zein proteins, simple sequence repeats and phenotypic traits for background selection in quality protein maize breeding
Maphosa, M.; Oballim, G.; Nalukenge, A.; Edema, R.; Okori, P. (African Crop Science Society, 2011)Widespread adoption of quality protein maize (QPM), especially among tropical farming systems has been slow mainly due to the slow process of generating varieties with acceptable kernel quality and adaptability to different ... -
Genetic analysis of resistance to rice bacterial blight in Uganda
Habarurema, I.; Asea, G.; Lamo, J.; Gibson, P.; Edema, R.; Séré, Y.; Onasanya, R.O. (African Crop Science Society, 2012)Rice bacterial blight (Xanthomonas oryzae pv.oryzae) is a major constraint to rice (Oryza sativa L.) production in Uganda and as part of strategies to develop resistant cultivars, it is important to evaluate resistance of ... -
Genetic characterisation of Ugandan strains of Colletotrichum sublineolum using ISSR makers.
Sserumaga, J.P.; Biruma, M.; Akwero, A.; Okori, P.; Edema, R. (National Agricultural Research Organisation, 2013)Colletotrichum sublineolum, the causal agent of sorghum anthracnose, presents high variability, genetic instability and host specialisation, hence rapidly breaking down resistance. In Uganda, no population studies of ... -
Genetics of drought tolerance in common bean genotypes adapted to Ugandan conditions.
Amongi, W.; Nkalubo, S.T.; Gibson, P.T.; Edema, R.; Ochwo-Ssemakula, M. (Academic Journals, 2015)Common bean (Phaseolus vulgaris L.) is an important source of food and income for majority of households in Sub-Saharan Africa. However, bean production in Uganda is being affected by drought which has resulted from recent ... -
Genetics of resistance to groundnut rosette virus disease
Kayondo, S.I.; Rubaihayo, P.R.; Ntare, B.R.; Gibson, P.T.; Edema, R.; Ozimati, A.; Okello, D.K. (African Crop Science Society, 2014)Groundnut Rosette Virus disease (GRD) has long been regarded a major limiting biotic constraint to groundnut production in Sub-Saharan Africa (SSA). The disease is caused by a complex of three viral components that interact ... -
Improvement of resistance to fusarium root rot through gene pyramiding in common bean
Obala, J.; Rubaihayo, P.R.; Gibson, P.; Edema, R.; Mukankusi, C. (African Crop Science Society, 2012)Fusarium root rot (FRR), caused by Fusarium solani f.sp. phaseoli, is one of the most serious root rot diseases of common bean (Phaseolus vulgaris L.) throughout the world. Yield losses of up to 84% have been attributed ... -
Influence of host plant resistance and disease pressure on spread of cassava brown streak disease in Uganda.
Katono, K.; Alicai, T.; Baguma, Y.; Edema, R.; Bua, A.; Omongo, C.A. (SCIENCEDOMAIN International, 2015)Cassava brown streak disease (CBSD) is a major constraint to cassava production in Uganda. The disease is caused by two ipomovirus species: Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV), ... -
Influence of season and cropping system on occurrence of cowpea diseases in Uganda.
Edema, R.; Adipala, E.; Florini, D.A. (American Phytopathological Society, 1997)An on-farm survey was conducted for two seasons (first and second rains of 1994) to determine influence of season and cropping systems on occurrence of cowpea (Vigna unguiculata) diseases in Uganda. Viral diseases were ... -
Inheritance of resistance to kernel infection by Aspergillusflavus and aflatoxin accumulation in groundnut
Ozimati, A.A.; Rubaihayo, P.R.; Gibson, P.; Edema, R.; Kayondo, I.S.; Ntare, B.R.; Okello, D.K. (International Scholars Journals, 2014)Aflatoxin contamination in groundnut is one of the major barriers in international groundnut trade. Aflatoxin may cause human cancer, hepatitis and liver cirrhosis. The objectives of the study were to determine: (i) the ... -
Inheritance of root dry matter content in sweet potato.
Shumbusha, D.; Tusiime, G.; Edema, R.; Gibson, P.; Adipala, E.; Mwanga, R.O.M. (African Crop Science Society, 2014)There has been much emphasis on breeding for increased sweet potato storage root yield, but less on dry matter yield, and its inheritance. High dry matter content (DMC) is associated with consumer preferences, and ... -
Pests and diseases on cowpea in Uganda: Experiences from a diagnostic survey.
Adipala, E.; Omongo, C.A.; Sabiti, A.; Obuo, J.E.; Edema, R.; Bua, B.; Atyang, A.; Nsubuga, E.N.; Ogenga-Latigo, M.W. (African Crop Science Society, 1999)diagnostic survey (DS) using a questionnaire covering 525 farm households was conducted in 1993/94 to determine the status of cowpea (Vigna unguiculata L. Walp) and its production constraints in Uganda. Subsequent on-farm ... -
A preliminary analysis of diversity among East African sweet potato landraces using morphological and simple sequence repeats (SSR) markers
Gichuru, V.; Aritua, V.; Lubega, G.W.; Edema, R.; Adipala, E.; Rubaihayo, P.R. (International Society for Hoticultural Science, 2006)East Africa is known to have a wide range of sweet potato landraces and, therefore, is considered to be a secondary center of diversity. In this study, we assessed the diversity among sweet potato landraces from Kenya, ... -
Prevalence of sorghum anthracnose in different agroecologies of Uganda
Sserumaga, J.P.; Biruma, M.; Akwero, A.; Okori, P.; Edema, R. (National Agricultural Research Organisation, 2013)Nine major sorghum growing agro-ecologies of Uganda were surveyed to establish the sorghum anthracnose incidence and severity. Hierarchical sampling was used. Severity of anthracnose in the field was rated on a scale of ... -
Prevalence of viruses infecting cowpea in Uganda and their molecular detection
Amayo, R.; Arinaitwe, A.B.; Mukasa, S.B.; Tusiime, G.; Kyamanywa, S.; Rubaihayo, P.R.; Edema, R. (Academic Journals, 2012)The main areas for cowpea cultivation in Uganda were surveyed in June and October 2006 for viruses affecting the crop. Seed and leaf samples from symptomatic and asymptomatic plants were collected from farmers’ fields and ... -
Reaction of rice cultivars to a virulent rice yellow mottle virus strain in Uganda
Mogga, M.L.; Lamo, J.; Asea, G.; Gibson, P.; Edema, R. (African Crop Science Society, 2012)Rice (Oryza spp.) has long been an important food staple for many traditional rice growing communities. Key developments in efforts to improve rice production such as the development of NERICA varieties have been widely ...