Research Papers/Topics in Crop Production And Science

Agronomic And Rodent Pests Management Practices By Maize Farmers In Ron Gal Division, (, '" Nakuru County

ABSTRACTRodent damage to maize and other cereal crops is a chronic problem to Kenyanfarmers and occasional outbreaks are reported. According to a report by theMinistry of Agriculture in the year 2008, damage of between 1 and 5 % arecommon but damages of 20-100 % have also been recorded. In this study, asurvey was carried out in Rongai Division, a cereal growing region in theKenyan Rift Valley, to identify the general crop husbandry and farmenterprises, knowledge on problem rodents, far...

Effect of Different Water Harvesting Techniques on Growth and Yield of Pearl millet (Pennisetum glaucum) Intercropped with Cowpea (Vigina sinensis) in North Darfur.

AbstractTwo field experiments were conducted for two consecutive rainy seasons of2011/12 and 2012/13 at Umhojar Village, Kabkabiya Locality- North DarfurState, Sudan to study the effect of different rainwater harvesting techniqueson growth and yield of pearl millet intercropped with cowpea. The area lieson sandy clay loam soil at Latitude 13o. 04" N and Longitude 24o.08" E,). Splitplot design with four replicates was used in which five water harvestingtechniques viz.; W1 (Terracing sy...

Evaluation Of Protocols For Regeneration Of Sweet Potato (Ipomoea Batatas (L.) Lam.) In Tissue Culture

ABSTRACTTissue culture techniques have opened a new frontier in agricultural science for addressing food security and poverty issues. These techniques have involved development of suitable plant regeneration protocols that can reduce disease infestation by producing healthy plants rapidly and hence increase yields in Kenya. The current research focus in sweet potato (Ipomoea batatas (L.) Lam) has been the development of transgenic sweet potatoes, with ability to resist viral diseases of which...

Multi location Performance Evaluation of Exotic Hybrid Rice (oryza sativa l.) Varieties in Eastern Zone of Tanzania

ABSTRACT Three exotic hybrid rice genotypes, HEU 022, HEU 188 and HEU 528 from China were tested to evaluate their stability and adaptability in the eastern agronomic zone of Tanzania. Three commonly grown varieties, SUPA, SARO 5 and TXD 88, were used as checks. A Randomized Complete Block Design (RCBD) experiment with three replications was carried out at four locations, ARI-Cholima, ARI-Katrin, Sokoine University of Agriculture (SUA) and Kilangali Rice Seed Farm all located in Mo...

Occurrence, Distribution And Molecular Diversity Of Groundnut Rosette Assistor Virus Causing Groundnut Rosette Disease In Western Kenya

ABSTRACTGroundnut (Arachis hypogaea Linn) is an important legume in western Kenya, but yields arelow and declining. Pests and diseases are ranked high among the yield reducing factors.Groundnut rosette disease (GRD) is the main disease and can cause up to 100% yield loss.Rosette is transmitted mainly by the groundnut aphid, Aphis craccivora Koch and to a lesserextent by Aphis gosypii Glover and Myzus persicae Sulzer. Rosette is caused by twosynergistic viruses; groundnut rosette assistor viru...

Efficacy Of Leaf Extracts Of Artemisia Annua And Thevetia Peruviana Against Aphis Fabae And Non-Target Organisms On Solanum Scabrum

ABSTRACTAfrican nightshade (Solanum scabrum Miller) is a vegetable, widely distributedthroughout the tropics including East Africa. It is an important vegetable in Kenya butconsumer demands have not been met due to low yields and partly due to attack byAphis fabae Scopoli. The aphids cause serious damage through sucking plant cell sapfrom phloem leaving the plant weakened, dehydrated, stunted in growth and eventuallyunder heavy infestation the leaves curl making the vegetables unattractive to...

Distributionand Characterization Of Groundnut Rosette Associated Virusesin Western Kenya

ABSTRACTGroundnut (Arachis hypogaea L.) is an economically important edible oilseed legumein Sub-Saharan Africa (SSA). Smallholder farmers, who account for 75% ofproducers, depend on it for food and income. However the yields are far below theworld averages. Groundnut rosette disease (GRD) is a major constraint of groundnutsin Sub-Saharan Africa (SSA) causing up to 100% yield losses. The disease is causedby two synergistic viruses; groundnut rosette assistor virus (GRAV, genus Luteovirus)and ...

Challenges Facing Chicken Production In Katulani District, Kitui County

ABSTRACTThe poultry industry in Kenya is a key contributor to the local economy as well as food security and income with over 90% of households owning a flock of chicken (Kingori et al., 2010). The main objective of this study was to investigate the challenges faced by rural and peri urban chicken farmers in Katulani District, Kitui County. The study focussed on understanding the challenges affecting chicken farming, factors affecting technology adoption, access to institutional support servi...

Belowground Influence Of Farmer-Produced Composts On Soil Biota, Foliar Pests And Yields Of Common Bean (Phaseolus Vulgaris) In Western Kenya

ABSTRACTThe production of common bean Phaseolus vulgaris in Kenya has been reducing dueto declining soil fertility. The use of synthetic fertilizers has been linked to soilacidification, which constrains plant growth and interferes with beneficialrhizosphere biota. The application of composts is being encouraged, and farmers inWestern Kenya are being trained on composting of locally available organicmaterials. However, there is need to establish the performance of such farmerproducedcomposts ...

Distribution And Characterization Of Groundnut Rosette Associated Viruses In Western Kenya

ABSTRACTGroundnut (Arachis hypogaea L.) is an economically important edible oilseed legumein Sub-Saharan Africa (SSA). Smallholder farmers, who account for 75% ofproducers, depend on it for food and income. However the yields are far below theworld averages. Groundnut rosette disease (GRD) is a major constraint of groundnutsin Sub-Saharan Africa (SSA) causing up to 100% yield losses. The disease is causedby two synergistic viruses; groundnut rosette assistor virus (GRAV, genus Luteovirus)and ...

Crop Detection and Control Advisory System

ABSTRACT This research is aimed at developing a Crop Disease Detection and Control Advisory System which assists the farming community. The idea of developing the system came as a way of mitigating the problems affecting the organization that include poor and slow service delivery in FCC shops when assisting farmers or giving advice to farmers. Farmers from remote areas have to travel long distances to get assistance and be advised on how they can cure certain diseases affecting their p...

Interaction Of Meloidogyne Incognita With Botryodiplodia Theobromae On Manihot Esculenta (Cassava) And Its Biocontrol

ABSTRACT The Root-Knot Nematode (RKN), Meloidogyne incognita and fungus Botryodiplodia theobromae, are important pests that cause yield losses in cassava and other crops. Chemicals have been used to manage these pests but with undesirable side effects. Information on pathogenicity of M. incognita, its interaction with B. theobromae and its biocontrol in Nigeria is very little. Therefore, pathogenicity of M. incognita on cassava, its interaction with B. theobromae and management with bio...

POST-CERTIFICATION SURVEILLANCE OF MARKETED VEGETABLE SEEDS IN THE GREATER ACCRA REGION FOR SEED QUALITY MAINTENANCE

ABSTRACTQuality seeds constitute one of the basic and the most important inputs in any vegetable crop production endeavour. A post-certification surveillance was undertaken to evaluate the quality of certified imported and local vegetable seeds at commercial retailers’ end in the distribution and marketing chains in the Greater Accra Region of Ghana. Structured questionnaires were administered to 18 commercial vegetable seed retailers who constituted the main vegetable seed delivery channel...

Biology and Ecology of the Leafroller (Sylepta derogata Fabricius) on Okra (Abelmoschus esculentus (L.) Moench)

ABSTRACT Sylepta derogata, Fabricius a major insect pest, defoliates and causes enormous yield loss in Abelmoschus esculentus (L) Moench. Control of the pest with chemicals and other methods have not been successful due to scanty information on the biology and ecology of the pest. This study was conducted to assess the biology and ecology of Sylepta derogata on Abelmoschus esculentus. Abelmoschus esculentus was planted in early (March-June, 2009), mid (July-September, 2009) and late (N...

EVALUATION AND INHERITANCE OF SINGLE AND MULTIPLE RESISTANCE TO VIRAL DISEASES OF COWPEA (Vigna unguiculata (L.) Walp)

ABSTRACT Viral diseases usually occur as multiple infections and significantly reduce yield in cowpea. Planting resistant cowpea varieties is economical and effective in controlling viral diseases. However, information on mode of inheritance of virus resistance required for cowpea breeding programmes is limited. Thus, single and multiple resistance and inheritance patterns of resistance to viral diseases were investigated in some selected cowpea breeding lines. Nine cowpea genotypes co...


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