Browsing Articles: Department of Water and Agricultural Resources Management by Title

Characterization of Kenyan French Bean genotypes into gene pool affiliations using allele specific markers

Arunga, Esther E.; Odikara, Shadrack O. (ACADEMIC JOURNALS, 2020-07)

French bean (Phaseolus vulgaris L.) is a major export crop in Kenya where it serves as a cash crop for smallholder farmers and a source of employment. However, there is limited information on characterization of available ...

Characterization of the Volatile Components of Essential Oils of Selected Plants in Kenya

Mugao, Lydia G.; Gichimu, Bernard M.; Muturi, Phyllis W.; Mukono, Simon T. (Hindawi, 2020-12)

Essential oils are secondary metabolites that plants produce for protection from pests and predators, attraction of pollinators, and seed dispersal. )e oils are made up of a mixture of compounds that give a characteristic ...

Characterization of Uromyces appendiculatus isolates collected from snap bean growing areas in Kenya

Arunga, Ester E.; Ochuodho, J.O; Kinyua, M.G.; Owuoche, J.O. (Academic Journals, 2012-11-02)

Bean rust (Uromyces appendiculatus (Pers.:Pers.) Unger var. appendiculatus) is one of the most devastating and variable pathogens of common bean (Phaseolus vulgaris L.) worldwide that can cause total crop loss. Characterization ...

Coffee Breeding in Kenya: Achievements, Challenges and Current Focus

Gichimu, Bernard M. (2015)

Coffee production in Kenya is seriously constrained by two fungal diseases namely Coffee Berry Disease (CBD) caused by Colletotrichum kahawae (Waller & Bridge) and Coffee Leaf Rust (CLR) caused by Hemileia vastatrix (Berk. ...

Coffee Drying in a Rotary Conduction-Type Heating Unit

Gikuru, Mwithiga; Jindal, V.K. (Blackwell Publishing Ltd, 2004-06-01)

Parchment coffee (Arabica) was dried from an initial moisture content of about 90% to 10% dry basis (db) in a recirculating rotary conduction type heating unit at controlled plenum temperatures of 100, 120 and 140C or ...

Coffee Sustainability in Kenya: Role Played by Improved Varieties

Gichimu, Bernard M. (2015)

Coffee production in Kenya has been sinking since 1980s. The condition has been worsened by climate change phenomenon which has brought new production challenges in recent years. The biggest challenge is the changing ...

Collembola Density and Diversity along a Gradient of Land- Use Types in Embu District, Eastern Kenya

Muturi, John J.; Mbugi, J.P.; Mueke, J.M.; Lagerlóf, Jan; Mungatu, J.K.; Nyamasyo, G.; Gikungu, M. (2009)

Populations of soil-dwelling Collembola were monitored on a land use gradient ranging from Natural forests to intensively cultivated land during the wet season October-November, 2007 and dry season February-March, 2008. ...

Collembola Richness and Diversity along A Land-Use Intensity Gradient in Taita, Kenya

Muturi, John J.; Mbugi, J.P.; Mueke, J.M.; Lagerlöf, Jan; Mungátu, J.K.; Nyamasyo, G.; Gikungu, M. (2009)

Soil Collembola communities were sampled along a gradient of land use intensification in Taita-Taveta, Wundanyi division, Coast Province during the wet season (October-November 2007) and dry season (February- March ...

Combining Ability of Inbred Lines of Maize (Zea mays) in Kiambu and Embu Counties, Kenya

Kariuki, J. M.; Njoka, Fredrick M.; Leley, P. K .; Manene, D. W. (Science Domain International, 2016-08)

Despite the fact that virtually all households in Kenya grow maize, over 60% of them are net maize buyers because they do not produce enough for their consumption. This is due to both biotic and abiotic factors such as ...

Combining CBD Resistance with High Yields and Good Cup Quality: Success case in Ruiru 11 Cultivar

Gichimu, Bernard M.; Gichuru, E. K.; Mamati, G. E.; Nyende, A. B. (2015)

Coffea arabica cv. Ruiru 11 is a composite of sixty six (66) F1 hybrid sibs each derived from a cross between a specific female and male population. The pedigree of Ruiru 11 consist of CBD resistance donors, Rume Sudan ...

Combining Host Plant Resistance, Selective Insecticides, and Biological Control Agents for Integrated Management of Tuta absoluta

Nderitu, Peris W; Jonsson, Mattias; Arunga, Ester E.; Otieno, Mark; Muturi, John J.; Wafula, Geoffrey O. (Hindawi, 2020-08)

Combination of pest management strategies that minimize pesticide use and conserve natural enemies is important for a sustainable environment. Overreliance on synthetic insecticides in the management of Tuta absoluta has ...

Comparative Antibacterial Effects of Raw Extracts and Essential Oils of Ocimum gratissimum L. against Ralstonia solanacearum (Smith)

Wagura, A. G.; Kimeju, J. W.; Gichimu, Bernard M. (Knowledge Review, 2011)

Raw and processed products of Ocimum gratissimum reportedly contain some antibacterial effects. In this study, raw plant extracts and essential oils derived from leaves of Ocimum gratissimum were screened for their ...

Comparative Trapping Efficiency to Characterize Bee Abundance, Diversity, and Community Composition in Apple Orchards

Joshi, N.K.; Leslie, Timothy; Rajotte, Edwin G.; Kammerer, Melaine A.; Otieno, Mark; Biddinger, David J. (Oxford University Press, 2015-07)

Bees are important pollinators of numerous crops, and monitoring their abundance and diversity in commercial agricultural ecosystems is of increasing importance due to pollinator declines. In season-long field studies ...

Comparison of a gas fired hot-air dryer with an electrically heated hot-air dryer in terms of drying process, energy consumption and quality of dried onion slices

Gikuru, Mwithiga; EL-Mesery, Hany S. (Academic Journals, 2012-08-14)

Onion slices were dried in either a gas-fired hot air dryer or an electrically heated hot air dryer at air temperatures of 50, 60 or 70°C, and at air flow velocities of 0.5, 1.0 or 2.0 m/s. Records of the drying rates and ...

Conservation tillage, local organic resources and nitrogen fertilizer combinations affect maize productivity, soil structure and nutrient balances in semi-arid Kenya

Kihara, J.; Bationo, A.; Mugendi, Daniel N.; Martius, C.; Vlek, P.L. (Springer, 2011-01)

Smallholder land productivity in drylands can be increased by optimizing locally available resources, through nutrient enhancement and water conservation. In this study, we investigated the effect of tillage system, organic ...