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Now showing items 84-103 of 173

Identification of QTL for Striga hermonthica Resistance Using Backcross Population Derived from a Cross between Oryza sativa (cv. Nipponbare) and O. rufipogon

Evans Atuti Atera, John Collins Onyango, Pham Thien Thanh, Takashige Ishii, Kazuyuki Itoh (Canadian Center of Science and Education, 2015-02-01)

The obligate root hemiparasite, Striga hermonthica (Del.) Benth., native to sub-Saharan Africa causes serious economic constraint to cereal production. Studies on Striga spp. interactions with rice are desirable as it is ...
Infection of sesame seed by Alternaria sesami (Kawamura) Mohanty and Behera and severity of Alternaria leaf spot in Kenya

PS Ojiambo, RD Narla, PO Ayiecho, RK Mibey (Taylor & Francis Group, 2000-01-01)

Infection levels of Alternaria sesami in sesame (Sesamum indicum L.) seeds collected from farmers in western districts of Kenya were detected using the oatmeal agar plate method. Infection levels varied from 9% in Kakamega ...
Influence of nitrogen supply on photosynthesis, chlorophyll content and yield of improved rice varieties under upland conditions in Western Kenya

PA Sikuku, JM Kimani, JW Kamau, S Njinju (sciencedomain., 2016-07-09)

Rice (Oryza sativa) is a principal staple food crop in Kenya. However, its production is still low due to inherently low and declining soil fertility. This has resulted into food and nutritional insecurity and low living ...
Influence of NPK Blended Fertiliser on Soil Chemical Properties under Acidic Conditions of Western Kenya on Finger Millet Crop

Dennis Simiyu Wamalwa (Asian Research Journal of Agriculture, 2017)

Soil acidity is a serious problem that affects crop productivity in Western Kenya region. The county governments of Kakamega, Bungoma, Vihiga, Busia and Trans-Nzoia are promoting the application of NPK blended fertilizer ...
Influence of NPK Blended Fertilizer Application on Chlorophyll Content and Tissue Mineral Contents of Two Finger Millet Varieties Grown in Acid Soils of Kakamega, Western Kenya

Dennis Simiyu Wamalwa, Phoebe Anyango Sikuku, Godfrey Wafula Netondo, Buyela Daniel Khasabulli (International Journal of Plant & Soil Science, 2019-01-09)

Acidic soils with high exchangeable aluminium ions occur in most parts of Kenya, western Kenya inclusive. Aluminium toxicity is a serious environmental problem that affects crop productivity in Western Kenya region. The ...
Influence of Organic and Inorganic Sources of Fertilizer on Growth and Leaf Yield of Kale (Brassica oleraceae Var. Acephala DC)

MO Abukutsa Onyango, JC Onyango (AGRICULTURAL SCIENCE AND TECHNOLOGY INFORMATION, 2005)

Brassica oleraceae var. Acephala D.C. (kale, sukuma wiki) is the most important vegetable in Kenya but its production is hampered by low soil fertility particularly Nitrogen and Phosphorus. Most small holder farmers do not ...
Influence of region of production on clonal black tea chemical characteristics

Owuor Okinda, P.; Nyirenda, Hastings E.; Obanda, Martin; Mandala, Wilson L. (Elsevier, 2008-05-01)

Production of black tea from the same vegetatively propagated (VP) cultivars, in Kenya and Malawi, shows variations in both chemical composition and quality. Whereas it is possible to produce black teas with similar total ...
Inheritance of resistance to the spotted stem borer, chilo partellus, in a maize population.

CJM Mutinda, SO Ajala, PO Ayiecho (Kenya Agricultural Research Institute, Nairobi (Kenya), 2006)

The spotted stem borer, Chilo partellus is an important insect pest of maize. It damages maize by feeding on the leaves and within the plant. Maize yield loss due to Chilo spp. Stem borer damage is estimated at 44 percent ...
Innundative biocontrol of water hyacinth (Eichhornia crassipes (Mart.) Solms. Laubach) using zonate leaf spot (Acremonium zonatum Sawada gams) fungal agent

George O Opande, C Mutebi, PF Arama (IOSR J Agric Vet Sci, 2013)

Innundative approach of biocontrol involves culturing spore inoculum for use as a concentrated formulation able to withstand storage, handling and application in weed control the same way as a chemical herbicide. A trial ...
Integrating Sustainability Ethics in Commercial Sugarcane Farming in the Lake Victoria Basin, Kenya

Fuchaka Waswa, Godfrey W Netondo (2014-03)

ince its introduction, large-scale commercial sugarcane farming has not significantly improved the living standards of particularly small-scale farmers in the western Kenya sugar belts. Being a monoculture production system, ...
Interactive effects of livestock and trees on nutrients and herbaceous layer production in a humid Kenyan savanna

Maina John Nyongesah, Wang Quan, Otieno Dennis, Oula Dorah, Mupenzi Jean de la Paix, Onyango John Collins (East African Journal of Science and Technology,, 2012)

Savannas are key ecosystems that provide vital services such as fodder for wild and domestic animals, recreation, biodiversity habitats, CO2 sequestration and timber. Their characteristics and distribution make them ...
Interactive influence of rainfall manipulation and livestock grazing on species diversity of the herbaceous layer community in a humid savannah in Kenya

Joseph O Ondier, Daniel O Okach, John C Onyango, Dennis O Otieno (Elsevier, 2019-06-01)

Changes in rainfall regime and grazing pressure affect vegetation composition and diversity with ecological implications for savannahs. The savannah in East Africa has experienced increased livestock grazing and rainfall ...
Introducing a novel natural logarithmic indices and their corresponding percentages table towards quantitative estimation of plant tolerance levels to stressors

Dennis O Omayio, David M Musyimi, Francis N Muyekho, SamuelI Ajanga, Charles AO Midega, Zeyaur R Khan, Innocent W Kariuki (2018)

The methods of evaluating tolerance levels of plants to stressors for many years have been based on indices and visual based scores which are more of descriptive and qualitative. Despite their ease of use the strategies ...
Isolation and Characterisation of Ralstonia Solanacearum Strains of Tomato Wilt Disease from Maseno, Kenya

Musyimi, David M; Khasabulli, Buyela D; Miruka, David M; Opande, George T; Jeruto, Pascaline (Asian Economic and Social Society, 2017)

Ralstonia solanacearum (E.F. Smith) Yabuuchi, is the cause of bacterial wilt of tomato and one of the most severe pathogens of solanaceous crops with a very wide host range. There is little information on R. solanacearum ...
Isolation and Characterisation of Ralstonia Solanacearum Strains of Tomato Wilt Disease from Maseno, Kenya

David M Musyimi, Buyela D Khasabulli, David M Miruka, George T Opande, Pascaline Jeruto (Asian Economic and Social Society, 2017)

Ralstonia solanacearum (E.F. Smith) Yabuuchi, is the cause of bacterial wilt of tomato and one of the most severe pathogens of solanaceous crops with a very wide host range. There is little information on R. solanacearum ...
Isolation of a new β-carboline alkaloid from aerial parts of Triclisia sacleuxii and its antibacterial and cytotoxicity effects

Samita, F.; O. Ochieng, C.; Okinda Owuor, P.; O.A. Manguro, L.; O. Midiwo, J. (Natural Product Research, 2017-01-01)

A new β-carboline alkaloid named sacleuximine A (1) together with known compounds palmatine (2), isotetrandrine (3), trans-Nferuloyltyramine (4), trans-N-caffeoyltyramine (5), yangambin (6), syringaresinol (7), sesamin ...
Isolation, characterization and biological activities of phytoconstituents from Lonchocarpus eriocalyx Harms leaves

Onyango Arot Manguro, Lawrence; Okind Owuor, Phillip; Atieno Ochung, Angeline (Islamic Azad University, Shahrood Branch Press, 2018-09-01)

The plant species Lonchocarpus eriocalyx Harms (Fabaceae) is a deciduous slender tree or shrub which grows up to 15 m tall. It is an important medicinal plant in Kenya used to treat a wide range of ailments including eye ...
Isozyme variation among Amaranthus cultivars.

JA Okeno, PO Ayiecho (Discovery and Innovation, 1996)

Electrophoretic variation of esterase (Est), peroxidase (Per), phosphoglucoisomerase [glucose-6-phosphate isomerase] (Pgi) and phosphoglucomutase (Pgm) was studied in seven Amaranthus populations, namely, Jumla, F1 Jumla, ...
The Kakamega Forest medicinal plant resources and their utilization by the adjacent Luhya community.

ARO Nyunja, JC Onyango, B Erwin (Medwell Online, 2009)

Kakamega Forest in Kenya is a rich natural setting endowed with abundant flora and fauna used by the local communities who once lived within the forest and those who now border it. There has been scarcity of information ...
Lake Victoria: The water hyacinth (Eichhornia crassipes [MART.] SOLMS), its socio-economic effects, control measures and resurgence in the Winam gulf

George Ogueno Opande, John Charles Onyango, Samuel Otieno Wagai (Urban & Fischer, 2004-05-01)

The aquatic weed Eichhornia crassipes [Mart.]Solms was introduced in Lake Victoria from Rwanda via the Kagera River by the activities of man. After originally infesting Lake Victoria (Uganda), it eventually spread into the ...

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