Working Document Series Open Access Severity expression of net blotch foliar infection as induced by initial exposure to aluminium toxicity and drought stress in barley S. Gyawali · J.O. Ochuodho · N.K. Rop · J.O. Were The interactions between aluminium toxicity, drought and net blotch may be the reasons for decreasing barley yields in Kenya despite availability of improved varieties. Such interactions induce diverse hormonal signaling and biochemical re… RUF-38736 2018 CC BY 4.0 15 Sep 2020
Working Document Series Open Access Evaluation of chickpea genotypes for tolerance to ascochyta blight P. Kimurto · K. Kiplagat · O. Kiplagat · J. Ochuodho In Kenya dry highlands where wheat, maize, and barley are the main crop, chickpeas are considered as off-season crop (October-February) before the next cropping season. Thus these crops provide an alternative source of income to farmers. C… RUF-38735 2018 CC BY 4.0 15 Sep 2020
Working Document Series Open Access The existence and distribution of cassava bacterial blight in East Africa D. Kilalo · A. Livoi · A. W. Mwang’ombe Cassava bacterial blight is one of the major bacterial diseases in all cassava growing regions in the world. The disease is caused by Xanthomonas axonopodis PV. Manihotis, a gram-negative rod shaped and belongs to the Gammaproteobacteria. … RUF-38732 2018 CC BY 4.0 15 Sep 2020
Working Document Series Open Access Efficacy of hot water treatment in management of sugarcane ratoon stunting disease J.W. Muthomi · R.D. Narla · E. S. Philip · G. M. Riungu Sugarcane ratoon stunting disease (RSD) caused by the bacterium Leifsonia xyli subsp. xyli causes huge losses to sugarcane ratoon crops. Hot water treatment is commonly used in many countries to control RSD but conflicting results show tha… RUF-38730 2018 CC BY 4.0 15 Sep 2020
Working Document Series Open Access Breeding for watermelon chlorotic stunt viral disease resistance in watermelon M.A. G. Abdelbagi · I. H. E. Babikir · Beshir Mayada M. · R. S. Omara +1 more The white fly transmitted watermelon chlorotic stunt virus (WmCSV) is the causal agent of the most devastating disease of watermelons (Citrullus lanatus) across many African and Middle Eastern countries including Sudan. Commercial cultivar… RUF-38727 2018 CC BY 4.0 15 Sep 2020
Working Document Series Open Access Reaction of Rice Blast Pyricularia oryzae CAV. isolates on a set of improved rice varieties in Western Kenya indicator to presence of pathogenic strains M. G. Kariaga · R. Onamu · J. Wakhungu · H. K. Were Rice (Oryza sativa L.) remains the most favoured grain for human consumption in the world. The yields in Kenya and many African countries are below the world averages. Rice blast disease has been registered as a major cause for reducing yi… RUF-38722 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Management of bacterial wilt of tomato using resistant rootstocks J.W. Muthomi · E. W. Mutitu · J. N. Onduso Bacterial wilt (Ralstonia solanacearum) is a devastating disease of tomato that is quickly spreading and affecting many fields causing a reduction in yield and income to farmers. The objective of the study was to determine the effect of us… RUF-38718 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Heterosis for fruit yield, yield components and bacterial wilt resistance of tomatoes genotypes in Kenya F. K. Kathimba · P. M. Kimani · L. M. Kiriika · R.D. Narla Yields of tomato (Solanum lycopersicum) in Kenya has continued to decrease due to biotic stresses especially bacterial wilt (Ralstonia solanacearum), fungal diseases, nematodes, tomato yellow leaf curl and overreliance on low yielding vari… RUF-38715 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Effect of maize lethal necrosis disease on seed quality of commercial hybrid varieties T. N. Kinyungu · D.W. Miano · J.W. Muthomi · F. Olubayo The recent maize outbreak of maize lethal necrosis (MLN) disease is a big threat to the already strained food security in Kenya. The disease is caused by co-infection of maize with Maize chlorotic mottle virus and cereal potyviruses mostly… RUF-38710 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Occurrence of fungal and bacterial diseases of common bean (Phaseolus vulgaris) in western Kenya J.W. Muthomi · P. B. Ochichi · J.M. Wagacha Bacterial and fungal diseases of common bean (Phaseolus vulgaris) are a major constraint in production of the crop in western Kenya. The objective of this study was to determine the occurrence of fungal and bacterial diseases of common bea… RUF-38708 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Fungal foliar diseases infecting groundnut: their management, status and the future J. Mwololo · T. Odong · P. Okori Cultivated groundnut (Arachis hypogaea L.) is an important oilseed crop widely grown in the tropics and subtropics. The yield for this crop is significantly affected by fungal foliar diseases namely leaf spots and rust to the tune of 60% i… RUF-38706 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Incorporating genomic markers and weather variables in genotype-by-environment interaction analyses for cassava brown streak disease D. Akdemir · W. Esuma · Jean-Luc Jannink · R. Kawuki +2 more Genotype-by-environment (GxE) interactions is a reality that scientists deal with when developing new and better varieties. With increase in scale of both phenotypic and genetic data, coupled with environmental data, prediction of environm… RUF-38704 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Efficacy of indigenous fungi isolates against root-knot nematodes (Meloidogyne spp) in-vito A. N. Kariuki · M. Maina · J.W. Waceke Root knot nematodes (Meloidogyne spp.) are a serious problem in smallholder tomato farms causing 90-100% yield loss in tomato crop in Kenya. For sustainable food production, effective management of nematodes is primarily dependent on the a… RUF-38700 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Trends in cassava brown streak disease diagnostics for certification of healthy cassava planting materials and future perspectives: A review D. Kilalo · I. Macharia · F. Munguti · A. W. Mwang’ombe +1 more Cassava (Manihot esculenta Crantz) is important for food security and livelihoods of more than 500 million people in sub-Saharan Africa particularly for poor subsistence farmers. However, its productivity is hampered by cassava brown strea… RUF-38697 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of root knot nematode, Meloidogyne spp. on the growth and productivity of tea clones in Meru County of Kenya James Wangai Kimenju · I. H. Mogeni · W.M. Muiru Plant parasitic nematodes have been reported in tea plantations in Kenya and have been associated with loss of tea plants in some areas. Nematodes associated with tea have been found to be well distributed in Ngere catchment of Murang’a Co… RUF-38694 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Occurrence and distribution of groundnut rosette disease in Western Kenya A. S. Mabele · B. Mukoye · M. F. O. Ndong’a · O. P. Orakha +2 more Groundnut (Arachis hypogaea Linn) is an important legume in western Kenya, but yields are low and declining. Pests and diseases are ranked high among the yield reducing factors. Groundnut rosette disease (GRD) is the main disease and can c… RUF-38692 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of legume extracts on root rot pathogens and germination of common bean (Phaseolus vulgaris) W. J. Muthomi · R.D. Narla · J. Nderitu · J. Ojiem +1 more Application of undecomposed green manure have been reported to result in poor germination and crop establishment thus poor yields. To understand the mechanism through which low emergence occurs, various legume extracts from lablab, soybean… RUF-38672 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of seed source on crop establishment, bacterial blight intensity, grain and dry matter yield in Cowpeas Most cowpea (Vigna unguiculata L.Walp) farmers use informal seed. The quality of this seed is unknown and thus crop establishment and performance is often uncertain. A study was conducted during the 2016 short rains in Makueni County in Ke… RUF-38588 CC BY 4.0 25 Aug 2020
Books and Book Chapters Open Access Sustainability in Plant and Crop Protection 14: Sustainable Management of Invasive Pests in Africa After many years of research in the field of invasive species, we have learnt that these pests can be disastrous to many cropping systems in Africa, especially in a context where countries are not prepared and do not have monitoring and co… RUF-38415 2020 CC BY 4.0 30 Jul 2020
Journal articles Open Access Genetic Basis of Maize Resistance to Multiple Insect Pests: Integrated Genome-Wide Comparative Mapping and Candidate Gene Prioritization S Agbahoungba · G. Asea · A. Badji · A. Bararyenya +14 more Several species of herbivores feed on maize in field and storage setups, making the development of multiple insect resistance a critical breeding target. In this study, an association mapping panel of 341 tropical maize lines was evaluated… RUF-38341 2020 CC BY 4.0 27 Jun 2020
Journal articles Open Access Evaluation of The Potential of Jack Bean [CANAVALIA ENSIFORMIS (L.) DC.] and Velvet Bean [mucuna pruriens (l.) Dc.] Aqueous Extracts as Post-Emergence Bio-Herbicides for Weed Control in Maize (ZEA MAYS L.) S Mabasa · P. J. Pieterse · J.T. Rugare The objective of the study was to evaluate the effect of jack bean and velvet bean aqueous extracts when applied post-emergence alone or in combination with half dosage rates of atrazine on goosegrass, beggarticks, and maize. Three potted … RUF-38325 2020 CC BY 4.0 24 Jun 2020
Theses & Dissertations Open Access REMOVAL OF CONTAMINANTS IN USED LUBRICATING OIL WITH CHEMICAL ACTIVATED CARBONS FROM PALM KERNEL AND COCONUT SHELLS Kwasi Opoku Boadu This research work examined the heavy metals contaminants and physico-chemical parameters of virgin and used lubricating oils using Atomic Adsorption Spectrometer for copper, cadmium, zinc, lead, magnesium, iron and chromium elements using… RUF-38216 2020 CC BY 4.0 10 Apr 2020
Journal articles Open Access Soybean rust severity, rate of rust development, and tolerance as influenced by maturity period and season E. Adipala · R. Kawuki · P. Tukamuhabwa Studies were conducted in Uganda for three consecutive seasons to evaluate soybean lines of different maturation periods against rust. All the lines were highly susceptible to rust with only two lines graded as moderately resistant: TGx 18… RUF-37894 2003 CC BY 4.0 17 Apr 2019
Journal articles Open Access Soybean rust severity, rate of rust development, and tolerance as influenced by maturity period and season E. Adipala · R. Kawuki · P. Tukamuhabwa Studies were conducted in Uganda for three consecutive seasons to evaluate soybean lines of different maturation periods against rust. All the lines were highly susceptible to rust with only two lines graded as moderately resistant: TGx 18… RUF-37893 2003 CC BY 4.0 17 Apr 2019
Journal articles Open Access Responding to the soybean rust epidemic in sub-Saharan Africa: a review Ekwamu Adipala · R. Kawuki · J. Lamo · P. Tukamuhabwa Soybean rust ( Phakopsora pachyrhizi Sydow), a major threat to soybean production, is a new pathogen on the African continent, where it is increasingly threatening soybean production. The fungus is highly variable, and this complicates mos… RUF-37891 2003 CC BY 4.0 17 Apr 2019
