A5084154951- Agronomic Practices and Intercropping Systems
- Plant Pathogens and Fungal Diseases
- Mycotoxins in Agriculture and Food
- Agricultural pest management studies
- Plant Virus Research Studies
- Plant Disease Resistance and Genetics
- Wheat and Barley Genetics and Pathology
- Insect Pest Control Strategies
- Agriculture, Plant Science, Crop Management
- Plant pathogens and resistance mechanisms
- Plant Pathogenic Bacteria Studies
- Legume Nitrogen Fixing Symbiosis
- Banana Cultivation and Research
- Plant Disease Management Techniques
- Crop Yield and Soil Fertility
- Genetics and Plant Breeding
- Plant Pathogens and Resistance
- Insect-Plant Interactions and Control
- Plant-Microbe Interactions and Immunity
- Nematode management and characterization studies
- Soybean genetics and cultivation
- Genetic and Environmental Crop Studies
- Seed Germination and Physiology
- Genetic Mapping and Diversity in Plants and Animals
- Insect Resistance and Genetics
University of Nairobi
2014-2024
Kenya Plant Health Inspectorate Services
2016-2024
Ross University School of Medicine
2014-2018
International Institute of Tropical Agriculture
2015
University of Bonn
2000
Increased demand for food to feed the ever-growing population led development and adoption of synthetic chemicals as a quick effective strategy managing crop pests diseases. However, overreliance on pesticides is discouraged due their detrimental effects human health, environment, resistant pest pathogen strains. This, coupled with increasing organically produced foods, stimulated search alternative approaches botanical are particularly gaining importance. Botanical efficacious in different...
Biopesticides are derivatives of plants, microorganisms and insects. Substances from plants animals have been used to manage diseases in crops, humans. Reliance on nature heal is a practise for many people around the world. Use natural products was overtaken by synthetic chemicals due their efficacy, reliability quick knock down effect. However, pesticides become health hazards humans environment toxicity pollution. potential alternatives pesticides. Sources biopesticides readily available,...
Aflatoxin poisoning resulting from consumption of contaminated maize has continued to recur in a yearly pattern Eastern Kenya. The largest mycotoxin-poisoning epidemic the last decade was reported Kenya 2004. Therefore, this study carried out determine occurrence and levels mycotoxin-producing fungi aflatoxin B1 soils Maize, mill dust samples were collected farmers traders Machakos incidence aflatoxins during 2007 harvest season. Fungal isolation done by plating on agar medium, while...
Aflatoxin contamination in maize by Aspergillus spp. is a major problem causing food, income and health concerns. A study was carried out Kaiti District Lower Eastern Kenya to evaluate the effect of three months storage triple-layer hermetic (PICS™) bags on population levels aflatoxin. Postharvest practices farmers including time harvesting, drying methods were obtained with questionnaire. soil isolated serial dilution-plating aflatoxin content measured using Vicam method. Maize mostly...
Abstract Push–pull involves intercropping of cereals with Desmodium as a “push” crop and planting Napier grass/ Brachiaria the “pull” at border. The technology has been reported to effectively control stemborers, striga weed, fall armyworm (FAW), improve soil nutrition, resulting in increased grain yield. This study evaluated impact stemborer FAW management using this on incidence maize ear rots preharvest contamination grains aflatoxin fumonisin western Kenya. was conducted during three...
In a 2022 field survey of 84 farms in the major regions bean cultivation (Central, Nyanza, Rift Valley and Western) southern Kenya, scab symptoms, similar to those documented by Jenkins (1931) Phillips (1994), were observed on common plants all four regions. Symptoms leaves, stems particularly pods affected (Figure 1). Light-green round irregular lesions progressing into raised areas grey, brown, or brick-red necrotic tissue. Elongated developed along stems, often leading twisting...
Abstract Mycotoxin contamination of wheat kernels and diversity fungal pathogens were monitored in a survey 26 fields Nakuru district, Kenya, 2006. Sampling was performed twice; at mid‐anthesis July for leaves, stems spikelets harvest September kernels. Kernels analysed the occurrence 32 mycotoxins using high performance liquid chromatography – electrospray tandem mass spectrometry (LC‐ESI‐MS/MS) method. Fungi isolated from surface‐sterilized tissues differentiated morphologically to genus...
Infection rate of chestnut tree by Botryosphaeria(Dothiorella) dathidea was about at Gapyung area. disease symptom did not appear in October but appeared November, showing May ext year. B. dothidea more pathogenic to than Catinula sp. and Fusicoccum uses soft rot, causes dry rot. Mycelial growth optimal . stimulated when water potential decreased from -2 bars -12 declined -60 bars.
Over 80% of farmers in the developing countries use seeds from informal seed supply that is unknown quality status with low physical purity, reduced vigour, and contamination seed-borne pathogens. A survey involving 114 was conducted Makueni Taita counties using a semistructured questionnaire to determine cowpea production practices. Forty-seven samples were collected farmers, thirty-four markets analysed for physiological quality. The data SPSS package. Majority, over 76% used farm-saved...
Consumption of maize contaminated with mycotoxins has been associated detrimental health effects. A farm survey covering 116 push-pull and 139 non-push-pull cropping systems was conducted to determine the socio-economic agronomic factors that influence farmers' knowledge on incidence contamination by ear rots in western Kenya. All respondents were smallholder farmers between ages 23 80 years, 50% them being female. Maize samples collected from standing crop field each interviewed farmer...
Abstract Bean scab caused by Elsinoë phaseoli is a major challenge to common bean cultivation in Kenya. However, knowledge about its epidemiology and management limited. This study conducted three experiments Kakamega, Kenya, evaluating inoculum sources control options. The first experiment evaluated different over two seasons; crop residue the highest incidence both 2021 (62.1%) 2022 (81.1%) seasons. second assessed effect of rotation history on Scab consistently surpassed 90% within 30...
Abstract Invasive alien species (IAS) rank among the most significant drivers of extinction and ecosystem degradation resulting in impacts on socio-economic development. The recent exponential spread IAS Africa is attributed to poor border biosecurity due porous borders that have failed prevent initial introductions. In addition, countries lack adequate information about potential invasions limited capacity reduce risk invasions. Horizon scanning an approach prioritises risks through rapid...