Working Document Series Open Access Enhancing sweetpotato resistance to African weevils (Cylas puncticollis and Cylas brunneus) through transgenic breeding J. F. Kreuze · S.B. Mukasa · R.J. Rukarwa Sweetpotato production is greatly constrained by two weevil species; Cylas puncticollis and C. brunneus that cause yield losses of up to 80%. The use of resistant sweetpotato cultivars is the most sustainable strategy to control the weevil… RUF-34519 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Pyramiding Fusarium root rot resistance genes and validation of SSR PVBR87 in common bean P. Gibson · C. Mukankusi · J. Obala · P.R. Rubaihayo This study determined effectiveness of pyramided Fusarium root rot (FRR) resistance genes and validated association of SSR PVBR87 marker with FRR resistance in common bean. A double cross (DC) involving four resistance sources was used to … RUF-34514 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Assessing effectiveness of macropropagation technology to produce healthy seedlings of banana varieties with high market demand in Eastern and Central provinces, Kenya R. Gathu · N. Kori · J. Mbaka · R. Muasya +2 more Banana is an important food and cash crop in Kenya. However, its cultivation is hindered by scarcity of seedlings, pests and diseases, among other factors. Naturally regenerated seedlings which most farmers rely on are likely to carry pest… RUF-34508 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Genetic diversity for resistance to larger grain borer in maize hybrids and open pollinated varieties in Kenya S. Mugo · S.W. Munyiri · J.K. Mwololo · P. Okori +1 more Modern maize varieties and hybrids possess improved agronomic performance and tolerance to abiotic and biotic stresses. However, breeding for the traits that contribute to resistance to post harvest pests have not been given due attention.… RUF-34498 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Genetics of resistance to bacterial leaf blight in rice germplasm in Uganda G. Asea · P. Gibson · J. Lamo · P.J. Mudingotto +3 more Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae is one of the most serious diseases of rice worldwide. The disease causes significant losses mostly in lowland rice. This study is investigating the mode of gene action of… RUF-34489 2010 CC BY 4.0 25 Aug 2015
Working Document Series Open Access Inheritance of resistance to rice yellow mottle virus disease in selected rice cultivars in Uganda G. Asea · R. Edema · J. Lamo · M.L. Mogga Rice yellow mottle sobemovirus (RYMV) has been identified as the most destructive viral disease in lowland and upland rice. In this study, the mode of inheritance of resistance to a prevalent RYMV strain in Uganda was determined for five r… RUF-34477 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Genetic inheritance studies and early generation marker selection in maize breeding for drought tolerance C. Magorokosho · X. Mhike · P. Okori It has been estimated that approximately US $10 billion of primary food production is lost annually because of drought. Interventions like irrigation are options the majority of the smallholder farmers in sub Saharan Africa cannot afford. … RUF-34476 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Introgressing resistance to Turcicum leaf blight and mapping of associated quantitative trait loci in sorghum M. Abdelbagi Ali · Mayada Mamoun Beshir · P. Gibson · P. Okori Screening for Turcicum leaf blight was carried out in F2 and F2:3 segregating sorghum populations under field and controlled conditions. Disease severity as a percentage of leaf area covered by lesions was computed and the lesion type was … RUF-34473 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Enhancing genetic resistance to soybean rust disease R. Bandyopadhyay · M. Maphosa · C. Mukankusi · H. Talwana Soybean is an important crop worldwide with unrivalled protein quality and content. Sustenance of soybean productivity is, however, compromised by the devastating soybean rust disease caused by the fungus Phakopsora pachyrhizi. Some resist… RUF-34472 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Assessing the efficacy of pyramided genes in conferring dual and durable resistance to bean anthracnose and root rot M. Kiryowa · C. Mukankusi · S. Nkalubo · H. Talwana +1 more Bean anthracnose (Colletotricum lindemuthianum) and root rots are important diseases of beans in Uganda. The coexistence of both diseases on the crop in farmers’ fields and the ability of these pathogens to overcome incorporated resistance… RUF-34465 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Biotic constraints to passion fruit production in central and eastern provinces of Kenya R. Gathu · N. Kori · J. Mbaka · Maina Mwangi +1 more Passion fruit is an important crop in Kenya for income generation. However, passion fruit production faces major challenges due to pests and diseases that have led to yield losses of 50-100%. To support development of effective integrated … RUF-34463 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Introgressing resistance to Fusarium root rot in selected farmer preferred Andean bean genotypes from Meso-American line and mapping of associated resistance quantitative trait loci K. Kamfwa · C. Mukankusi · M. Mwala · P. Okori Two populations of beans (Phaseolus vulgaris) from K20 x MLB-49-89A and K132 x MLB-49-89A were assessed for resistance to Fusarium solani f.sp. phaseoli. Additionally, 35 SSR markers were screened for polymorphisism in the parents. The res… RUF-34455 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Characterization of root development in a segregating diploid banana population as a searching basis for resistance to Radopholus similis M. Inamahoro · J. Lorenzen · H. Talwana Plant parasitic nematodes are recognised as the most serious pests of bananas wherever they are grown. Nematodes feed, multiply and migrate inside banana roots causing necrotic and reduced root systems. Genetic resistance to nematodes prov… RUF-34444 2010 CC BY 4.0 21 Aug 2015
Working Document Series Open Access Combining ability among interspecific (G. hirsutum x G. barbadense) and mutation derived lines of cotton in fiber quality and agronomic traits N. Bbebe · D.M Lungu · B.M. Siamasonta Zambia’s cotton has had a very good reputation on the international market for a long time. In order to maintain this reputation, the cotton Development Trust of Zambia continues to evaluate germplasm for suitable parents. In this study, t… RUF-34409 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Factors influencing pesticide use among cocoa farmers in Ondo State, Nigeria Akeem Abiade. Tijani Cocoa production in Nigeria is constrained by insect pests and diseases. The brown cocoa mirid (Sahlbergella singularis), the swollen shoot virus transmitted by mealy bugs and the black pod disease (Phytophthora palmivora and P. megakarya)… RUF-34393 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Fumigant toxicity of five essential oil constituents against major stored-product insect pests of food grains P.K Bett · A.L. Deng · E. A.W. Kamau · S.T Kariuki +5 more Insect pests attacking stored food grains cause substantial losses that undermine food security in sub-Sahara Africa. Subsistence farmers predominantly use traditional plant-based products to protect their grains in storage. In an attempt … RUF-34387 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Response of sorghum genotypes to indigenous and exotic stem borers in Kenya P. Gibson · S. Kyamanywa · M. Mgonja · P.W. Muturi +1 more Field trials are being conduced in Kenya to identify sources of resistance, especially multiple resistance to Buseola fusca and Chilo partellus, two devastating pests of maize in sub-Saharan Africa. Genotypes ICSB 464, ICSB 467, Macia, IES… RUF-34367 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Assessment of groundnut yield loss due to the groundnut leaf miner, Aproaerema modicella infestation in Mozambique M. Botao · D. Cugala · L. Santos · A. Sidumo +1 more The groundnut leaf miner, Aproaerema modicella Deventer (Lepidoptera: Gelechiidae), is an invasive alien Asian species in Mozambique. A. modicella was reported for the first time in 1998 in Uganda. In Mozambique, Groundnut leaf miner was f… RUF-34364 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Assessment of the fruit fly, Batrocera invadens, pest status and the establishment of the parasitoid, Fopius arisanus in Mozambique G. Albano · D. Cugala · L. Santos Asian fruit flies in the genus Bactrocera (Diptera: Tephritidae) are regarded as some of the most destructive pests of fruits and vegetables worldwide and rank high on quarantine lists worldwide. Losses result from direct feeding damage, d… RUF-34342 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Diversity and colonization of permanent and semi-permanent breeding habitats by Anopheles mosquitoes in a semi-arid ecosystem of Baringo district in Kenya S.O. Arum · E.D. Kokwaro · F. Mulwa Diversity, occurrence and utilization of mosquito breeding habitats is an essential component of vector ecology and important in designing and implementation of vector management programs. A one year larval survey was conducted to determin… RUF-34341 2010 CC BY 4.0 20 Aug 2015
Working Document Series Open Access Weeds as potential biopesticides in Taro leaf blight disease management D. Chikoye · C. Fokunang · L. A. Fontem · E. M. Ndifon Weeds play an important role as biopesticides for the management of several field pests. An experiment was conducted in the Life Science Laboratories of the University of Buea in 2012 to assess the biopesticidal potential of aqueous extrac… RUF-34300 2014 CC BY 4.0 17 Aug 2015
Working Document Series Open Access Biosecurity preparedness is integral to sustainable food security in Africa S. Sharma Growth in international trade, tourism and increasing international movements of people will increasingly expose countries in Africa to biosecurity threats, which will significantly impact on economies, community health and native biodiver… RUF-34278 2014 CC BY 4.0 17 Aug 2015
Working Document Series Open Access Indigenous knowledge practices for production and management of spider mites and anthracnose in smallholder French bean farmers in Nakuru County, Kenya J. G. Nyaanga · S. O. Ochola · K. O. Ogayo · J. O. Ogendo +2 more A field survey was conducted to inventory the major crops grown, French bean production constraints, pests and diseases and indigenous control strategies. A total of 56 smallholder French bean farmers were interviewed using structured ques… RUF-34196 2014 CC BY 4.0 14 Aug 2015
Working Document Series Open Access Effect of farming practices on the occurrence of scab of wheat and its management through cultivar resistance C.K. Mutegi · J.W. Muthomi · R.D. Narla · N.K. Njeru +2 more A survey was carried out in Nakuru and Narok Counties at hard dough stage and at harvest. A semi structured questionnaire was used to collect information on wheat production practices. Fusarium head blight incidence and severity in each fa… RUF-34118 2014 CC BY 4.0 13 Aug 2015
Working Document Series Open Access Xanthomonas campestris pv. musacearum insect vector activity on banana across altitude and seasons in Rwanda G. Blomme · G. Night · W. Ocimati · A. Rutikanga +1 more Banana Xanthomonas Wilt (BXW) ( Xanthomonas campestris pv. musacearum -Xcm) disease is considered the most important threat to banana production in the Great Lakes Region of Africa. Insect vectors are one of the key ways through which the … RUF-34104 2014 CC BY 4.0 13 Aug 2015
