Working Document Series Open Access Heterosis for fruit yield, yield components and bacterial wilt resistance of tomatoes genotypes in Kenya F. K. Kathimba · P. M. Kimani · L. M. Kiriika · R.D. Narla Yields of tomato (Solanum lycopersicum) in Kenya has continued to decrease due to biotic stresses especially bacterial wilt (Ralstonia solanacearum), fungal diseases, nematodes, tomato yellow leaf curl and overreliance on low yielding vari… RUF-38715 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Fitting banana tissue culture planting material into farmers’ cultural values in Central Uganda: Challenge to control of banana Xanthomonas wilt P. Kibwika · E. Kikulwe · F.B. Kyazze · L. Mulugo +1 more Banana tissue culture planting materials are one of the strategies for fighting the Banana Xanthomonas Wilt (BXW) disease in Uganda. The disease is a major threat to food and income security in parts of Uganda where banana is an important … RUF-38712 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Effect of maize lethal necrosis disease on seed quality of commercial hybrid varieties T. N. Kinyungu · D.W. Miano · J.W. Muthomi · F. Olubayo The recent maize outbreak of maize lethal necrosis (MLN) disease is a big threat to the already strained food security in Kenya. The disease is caused by co-infection of maize with Maize chlorotic mottle virus and cereal potyviruses mostly… RUF-38710 2018 CC BY 4.0 13 Sep 2020
Working Document Series Open Access Occurrence of fungal and bacterial diseases of common bean (Phaseolus vulgaris) in western Kenya J.W. Muthomi · P. B. Ochichi · J.M. Wagacha Bacterial and fungal diseases of common bean (Phaseolus vulgaris) are a major constraint in production of the crop in western Kenya. The objective of this study was to determine the occurrence of fungal and bacterial diseases of common bea… RUF-38708 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Fungal foliar diseases infecting groundnut: their management, status and the future J. Mwololo · T. Odong · P. Okori Cultivated groundnut (Arachis hypogaea L.) is an important oilseed crop widely grown in the tropics and subtropics. The yield for this crop is significantly affected by fungal foliar diseases namely leaf spots and rust to the tune of 60% i… RUF-38706 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Incorporating genomic markers and weather variables in genotype-by-environment interaction analyses for cassava brown streak disease D. Akdemir · W. Esuma · Jean-Luc Jannink · R. Kawuki +2 more Genotype-by-environment (GxE) interactions is a reality that scientists deal with when developing new and better varieties. With increase in scale of both phenotypic and genetic data, coupled with environmental data, prediction of environm… RUF-38704 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Efficacy of indigenous fungi isolates against root-knot nematodes (Meloidogyne spp) in-vito A. N. Kariuki · M. Maina · J.W. Waceke Root knot nematodes (Meloidogyne spp.) are a serious problem in smallholder tomato farms causing 90-100% yield loss in tomato crop in Kenya. For sustainable food production, effective management of nematodes is primarily dependent on the a… RUF-38700 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Trends in cassava brown streak disease diagnostics for certification of healthy cassava planting materials and future perspectives: A review D. Kilalo · I. Macharia · F. Munguti · A. W. Mwang’ombe +1 more Cassava (Manihot esculenta Crantz) is important for food security and livelihoods of more than 500 million people in sub-Saharan Africa particularly for poor subsistence farmers. However, its productivity is hampered by cassava brown strea… RUF-38697 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of root knot nematode, Meloidogyne spp. on the growth and productivity of tea clones in Meru County of Kenya James Wangai Kimenju · I. H. Mogeni · W.M. Muiru Plant parasitic nematodes have been reported in tea plantations in Kenya and have been associated with loss of tea plants in some areas. Nematodes associated with tea have been found to be well distributed in Ngere catchment of Murang’a Co… RUF-38694 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Occurrence and distribution of groundnut rosette disease in Western Kenya A. S. Mabele · B. Mukoye · M. F. O. Ndong’a · O. P. Orakha +2 more Groundnut (Arachis hypogaea Linn) is an important legume in western Kenya, but yields are low and declining. Pests and diseases are ranked high among the yield reducing factors. Groundnut rosette disease (GRD) is the main disease and can c… RUF-38692 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of legume extracts on root rot pathogens and germination of common bean (Phaseolus vulgaris) W. J. Muthomi · R.D. Narla · J. Nderitu · J. Ojiem +1 more Application of undecomposed green manure have been reported to result in poor germination and crop establishment thus poor yields. To understand the mechanism through which low emergence occurs, various legume extracts from lablab, soybean… RUF-38672 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Increasing yellow passion yields by managing water stress using hydrogel, polythene and grass mulches in Embu and Kiambu Counties, Kenya N. Korir · J. M. Michoma · J.N. Mugwe · M. Mwangi ver the years, farmers in dry areas of Africa have depended on a narrow range of crops that tolerate water stress for nourishment and income generation. Yellow passion fruit production is a lucrative venture of much higher income compared … RUF-38668 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Morphological response of selected passion fruit varieties to limiting water status J. O. Gweyi · M. M. Kimani · M. Mwangi · S. Runo Passion fruit (Passiflora spp.) is the third most common fruit in Kenya. It belongs to the Passifloraceae family with three species under production in Kenya. The Kenya Agricultural and Livestock Research Organization (KARLO) released thre… RUF-38665 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Analysis of uptake of drip irrigation by smallholder farmers in Zimbabwe: Case study of Mutare District M. Chiwa · K. Mukumbi The use of drip irrigation has the potential to increase yields but uptake by smallholder farmers in Zimbabwe has been low. This study was conducted to determine the factors influencing the adoption of smallholder farmers in Zimbabwe. The … RUF-38661 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Is there potential for integrated soil fertility management use in Machakos County, Kenya? B. Danga · K. Kwena · R. Osiyo · S. W. Wamalwa Chronic food insecurity in Machakos and other semi arid areas in Kenya could be attributed to climate variability but mainly to soil nutrient decline. A lot of resources have been directed to smallholder farmers in drylands in the past but… RUF-38658 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Socio-cultural aspects in harvesting of Jackfruit in Busia County, Kenya C. Gitonga · V. O. Kirigua · G. Mbure · V. Ochieng +2 more This study assessed the socio-cultural dimensions of harvesting jackfruit in Busia County of Kenya. Data were collected using quantitative and quantitative methods with farmers (i.e., structured interviews, key informant interviews and fie… RUF-38653 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Effect of controlled release urea on soil nitrogen mineralization and maize yield in Siaya County, Kenya A. N. Karanja · B. Mochoge · R.N. Onwonga · C. Shisanya +1 more Although nitrogen (N) is a major limiting nutrient in most soils in Kenya, it is often lost before it is used up by crops. This is due to the high dynamics of its transformations in the soil, making it easily lost from the soil. This usual… RUF-38651 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Status of production of Jackfruit (Artocarpus heterophyllus Lam.) in Busia County, Kenya C. Gitonga · V. O. Kirigua · V. Ochieng · L. Wasilwa +1 more Jackfruit is one of the underutilised fruits in Kenya which has potential to contribute to food and nutrition security. However, little is known about the status of jackfruit production in the country. This study assessed the status of jac… RUF-38646 2018 CC BY 4.0 12 Sep 2020
Working Document Series Open Access Financial institutions and farming systems characterisation in the southern province (Amajyepfo) of Rwanda E. Bett · I. Macharia · N. Taremwa One of most prominent interventions that governments world over and especially in Africa have adopted is the enhancement of agricultural finance systems, the provision of agricultural credit to farmers, and creation of policy environments … RUF-38639 2018 CC BY 4.0 9 Sep 2020
Working Document Series Open Access Moisture stress reduces stomata conductance, growth and yield of soybean K. E. Cheruiyot · L. H. Mwamlima · J.P. Ouma Soybean [Glycine max (L) Merrill] yield amongst smallholder farmers in Kenya is low and range from 445-1200 kg ha-1. These low yields are attributed to various factors including moisture stress and use of poor agronomic practices. Optimiza… RUF-38634 2018 CC BY 4.0 7 Sep 2020
Working Document Series Open Access Signaling and cross-talk between Salicylic Acid and Abscisic Acid phytohormones on Net Blotch, Aluminium toxicity and drought stresses in barley S. Gyawali · J.O. Ochuodho · N.K. Rop · J.O. Were Varying levels of abscisic acid and salicylic acid whose effects can be antagonistic or synergistic are produced by plants including barley under stress conditions. This scenario has not been explored in details and scientifically document… RUF-38630 2018 CC BY 4.0 7 Sep 2020
Working Document Series Open Access Effects of inorganic fertilizer applications on grain yield, nutrient use efficiency and economic benefits of maize in Western Kenya G. Chemining’wa · C.K.K. Gachene · H. M. O. Otieno · S. Zingore Declining soil fertility levels due the application of low rates and unbalanced nutrients is the main cause of low yields in western Kenya. We therefore designed a randomized complete block nutrient omission trial with six replications to … RUF-38629 2018 CC BY 4.0 7 Sep 2020
Working Document Series Open Access Occurrence and distribution of Tuta absoluta (Gelechiidae) in Tanzania Patrick A. Ndakidemi · M. Chacha · E. R. Mbega · N. Zekeya Thirteen regions were surveyed for the presence and abundance of the tomato leafminer (Tuta absoluta) in Tanzania. The survey was conducted in 2015, 2016 and 2017 across selected agro-ecological regions of Tanzania. Monitoring was conducte… RUF-38627 2018 CC BY 4.0 7 Sep 2020
Working Document Series Open Access Analysis of agro-morphologic diversity of Zambian sesame (Sesamum indicum (l.)) landraces G. Munkombwe · M. Mwala · D. Nguni Twenty-eight sesame landraces were grown in the field at Mt Makulu Research Station during the 2013/14 cropping season and agro-morphological variation estimated based on 24 morphologic and agronomic descriptors. The landraces were obtaine… RUF-38626 2018 CC BY 4.0 4 Sep 2020
Working Document Series Open Access Comparative effects of soybean, grain amaranth (Amaranthus spp) and nitrogen on Striga (Striga hermonthica) and maize yield in western Kenya W. K. Ngetich · E. K. Ronoh · V. K. Rotich · C. Serem Western Kenya, the area considered the grain basket of the country, is heavily infested by Striga, reducing maize yields by up to 30-100%. On-farm trials were conducted in two cropping seasons between August 2014 to July 2015 at Ugunja, Si… RUF-38623 2018 CC BY 4.0 4 Sep 2020
