Browsing Articles: Department of Water and Agricultural Resources Management by Author "Gichimu, Bernard M."
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Adoption Determinants of Adapted Climate Smart Agriculture Technologies Among Smallholder Farmers in Machakos, Makueni, and Kitui Counties of Kenya
Muriithi, Lydia N.; Onyari, Charles N.; Mogaka, Hezron R.; Gichimu, Bernard M.; Gatumo, Geoffrey N.; Kwena, Kizito (2021-04)The study examined the adoption determinants of adapted climate smart agriculture (CSA) technologies among smallholder farmers. A multi-stage sampling procedure was used to select a total sample of 384 households. Percentages ... -
Agronomic Performance of three most Popular Commercial Watermelon Cultivars in Kenya as Compared to one newly introduced cultivar and one local Landrace grown on Dystric Nitisols under Sub- Humid Tropical Conditions
Gichimu, Bernard M.; Owuor, B. O.; Dida, M. M. (Asian Research Publishing Network (ARPN)., 2008-11)Agronomic performance trial involving five cultivated watermelon accessions available in Kenya was conducted at Maseno University Research Fields for two seasons between year 2007 and 2008. The accessions included three ... -
Antimicrobial Activity of Foliar Fertilizer Formulations and their Effect on Ice Nucleation Activity of Pseudomonas syringae Pv. garcae Van Hall; the Causal Agent of Bacterial Blight of Coffee
Mugiira, R. B.; Arama, P. F.; Macharia, J. M.; Gichimu, Bernard M. (Academic Journals, 2011)This study was carried out with the broad objective of assessing the potential for control of Bacterial Blight of Coffee (BBC) using foliar fertilizer applications to Inhibit Ice Nucleation Activity (INA) of the causative ... -
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 ... -
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 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 ... -
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 ... -
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 ... -
Drought and heat tolerance in coffee: a review
Cheserek, J.J; Gichimu, Bernard M. (International Research Journals, 2012-12)Climatic variability is the main factor responsible for the fluctuations in the coffee yield in the world. The relationships between the climatic parameters and the agricultural production are quite complex, because ... -
Early Agronomic Performance of Some New and Existing Arabica Coffee Varieties in Kenya
Gichimu, Bernard M.; Omindi, C. O.; Gichuru, E. K. (2015)The primary goal of plant breeding is to improve yield, quality and disease resistance. However, majority of reported work on coffee breeding primarily concerns agronomical improvement that directly impinges on either ... -
Effects of Selected Plants' Extracts on in vitro Growth of Rahtonia slanacearum (Smith), the Causal Agent of Bacterial Wilt of Irish Potatoes
Wagura, A. G.; Wangai, S. O.; Manguro L.; Gichimu, Bernard M. (Asian Network For Scientific Information, 2011)The antibacterial effect of crude medicinal plant extracts of Ocimum gratissimum, Brassica oleracea var. botrytis and Ipomoea batatas on Rahtonia solanacearum (Smith) extracted from infected potato tubers was determined ... -
Exploring the Changes of Resistant Genes Expression in Groundnuts (Arachis Hypogea) In Response to Aspergillus Flavus Exposure at Seedling Stage
Okayo, Robert O.; Andika, Darius O.; Dida, Mathews M.; K’Otuto, George O.; Gichimu, Bernard M. (2020-07)Aspergillus flavus infect groundnut seeds and produce secondary metabolites, aflatoxins. The aflatoxins are associated with various diseases in domestic animals and humans globally. Mitigating the aflatoxin contamination ... -
Genetic Characterization of Arabusta Coffee Hybrids and their Parental Genotypes using Molecular Markers
Gimase, J. M.; Thagana, W. M.; Kirubi, D. T.; Gichuru, E. K.; Gichimu, Bernard M. (2015)Twenty coffee genotypes were characterized comprising of eleven F1 interspecific Arabusta hybrids, three induced tetraploid Robusta parental genotypes, four Arabica parental genotypes, one diploid Robusta accession and ... -
In Vitro Control ofPhytophthora infestans and Alternaria solani Using Crude Extracts and Essential Oils from Selected Plants
Mugao, Lydia G.; Muturi, Phyllis W.; Gichimu, Bernard M.; Njoroge, Ezekiel K. (Hindawi, 2020-07)Tomato production is constrained by fungal diseases especially the early and late blight caused by Alternaria solani and Phytophthora infestans, respectively. Control of the two diseases is usually by use of synthetic ... -
Integrated Soil Fertility and Water Management Practices for Enhanced Agricultural Productivity
Ndegwa, Jackline K.; Gichimu, Bernard M.; Mugwe, Jayne N.; Mucheru-Muna, Monicah; Njiru, Daniel M. (UoeM, 2023-06-23)Declining agricultural productivity has been a challenge worldwide and especially in Sub-Saharan Africa (SSA). Low agricultural productivity has been attributed to factors such as poor farm management practices, soil ... -
Leveraging on germplasm acquisition for Arabica coffee improvement in Kenya
Gichimu, Bernard M.; Omondi, Chrispine; Cheserek, Jane; Gimase, James (Scienceweb Publishing, 2016-01)The low genetic variability within Coffea arabica species is a major hindrance to its improvement. The emergence of new pathogen races, especially for the prevalent fungus Hemileia vastatrix ... -
Morphological and Molecular Characterization of Toxigenic Aspergillus flavus from Groundnut Kernels in Kenya
Okayo, Robert O.; Andika, Darius O.; Dida, Mathews M.; K’Otuto, George O.; Gichimu, Bernard M. (Hindawi, 2020-09)Pathogenesis of Aspergillus flavus on important agricultural products is a key concern on human health due to the synthesis and secretion of the hazardous secondary metabolite, aflatoxin. &is study identified and further ... -
Morphological Characterization of Five Newly Developed Lines of Arabica Coffee as Compared to Commercial Cultivars in Kenya
Gichimu, Bernard M.; Omondi, C. O. (ACADEMIC JOURNALS, 2010)Five new lines of Arabica coffee and two existing commercial cultivars planted in the field were characterized morphologically. The objective of this study was to determine the level of morphological variation within and ... -
Occurrence of Ck-1 gene conferring resistance to Coffee Berry Disease in Coffea arabica cv. Ruiru 11 and its parental genotypes
Gichimu, Bernard M.; Gichuru, E. K.; Mamati, George E.; Nyende, A.B. (SCIENCEWEB PUBLISHING, 2014-03)Abstract. Resistance to Coffee Berry Disease (CBD) in Coffea arabica cv. Ruiru 11 is known to be controlled by among others, the T (Ck-1) gene from Robusta coffee (Coffea canephora Pierre). The cultivar reportedly presents ... -
Performance assessment of Crosses between Gadam and Hardcore Tannin sorghum in hybrid lines production
Shinda, Cecilia A.; Gitari, Josiah N.; Nthakanio, Paul N.; Runo, Steven; Gichimu, Bernard M.; Maina, Samuel (2022-06)Gadam cultivar of sorghum has been characterized by low yields compared to the international yield levels of sorghum. In this research, Gadam was crossed with Serena, Seredo, and Kari/Mtama-1 in an attempt to increase ...