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Now showing items 951-960 of 1022
Short-term dynamics of soil organic matter fractions and microbial activity in smallholder potato-legume intercropping systems
(University of Nairobi, 2019)
Continuous cultivation of potato (Solanum tuberosum L.) in monoculture systems represents the greatest factor deteriorating soil organic matter (SOM) in smallholder farms. With an aim to breaking this norm, a 2-year field ...
Biopesticide-based IPM systems to reduce synthetic pesticide residues in vegetables for niche market access by small holder growers
(University of Nairobi, 2016)
In the last few decades, farmers have relied on synthetic pesticides to managed crop pests and diseases. This is because synthetic pesticides are easily available, have quick knock down effect, have varied modes of action ...
Controlling soil erosion in smallholder potato farming systems using legume intercrops
(University of Nairobi, 2019)
Competition for nitrogen (N) and phosphorous (P) under potato-based intercropping systems decreases the level of nutrients available for potato and subsequently influences nitrogen and phosphorous use efficiency. A field ...
Viability and Dormancy of Rice Seeds after Storage and Pre-Treatment with Dry Heat and Chemical Agents
(University of Nairobi, 2017)
Inappropriate seed packaging and seed dormancy affects seed quality and consequently leads to reduced crop stand, low seedling vigour and reduced yields. The objective of the study was to determine the effect of seed ...
Deterministic processes structure bacterial genetic communities across an urban landscape.
(Deterministic processes structure bacterial genetic communities across an urban landscape., 2019)
Land-use change is predicted to act as a driver of zoonotic disease emergence through human exposure to novel microbial diversity, but evidence for the effects of environmental change on microbial communities in vertebrates ...
Integration of Seed Dressing, Bio-pesticides and Intercropping to Reduce Pesticide Use in Snap Bean Production
(University of Nairobi, 2018)
Insect pests remain a major constratint in the production of snap beans and farmers mainly rely on synthetic
chemical pesticides to manage the insect pests and diseases. However, the introduction of maximum residue levels ...
Seasonal Dynamics and Alternate Hosts of Thrips Transmitted Iris Yellow Spot Virus in Kenya
(University of Nairobi, 2018)
Thrips-transmitted Iris yellow spot virus (IYSV) (Family Tospoviridae, Genus Orthotospovirus) is a major
constraint to onion (Allium cepa L.) production in Kenya. Determining seasonal patterns of the vector and
alternate ...
Effect of Legume Extracts on Germination, Seedling Health of Beans (Phaseolus vulgaris L.) and Soil Microorganisms
(University of Nairobi, 2019)
Application of undecomposed green manure has been reported to cause poor emergence and establishment of common beans in the field. Therefore, to understand the mechanisms’ contributing to the poor crop establishment, the ...
Efficiency of Aphid and Thrips Vectors in Transmission of Maize Lethal Necrosis Viruses
(University of Nairobi, 2018)
Maize lethal necrosis disease occur in major growing regions of Kenya, causing losses of up to 100% estimated at 50 million US$ in 2014/15. The study was undertaken to evaluate the efficiency of thrips and aphids in ...
Effect Of Intercropping Maize-Soybean On Grain Quality Traits In Kenya
(University of Nairobi, 2017)
An study was carried out in Kenya to assess the suitability of three promiscuous soybean varieties
(SB19, GAZELLE and TGX1990-5F) intercropped with Maize (Duma 43). A randomised complete
block design was used replicated ...