ABSTRACT Efficient breeding and selection of elite tea (Camellia sinensis (L.) O. Kuntze) clones require sound knowledge and understanding of genetics associated with yield, quality and tolerance to biotic and abiotic stresses. A series of experiments were carried out to elucidate the genetic parameters and map quantitative trait loci (QTL) for agronomic and quality attributes in tea. The combining abilities and heterosis for yield, drought tolerance (DT), and quality traits (percent total p...
ABSTRACT Potato is a strategic commodity with the potential to improve food and nutrition security and to generate income in Rwanda. Despite its potential, potato intensification remains low, translating into low yield. The low yield is occasioned mainly by the decline in soil fertility. In addition, farmers adapt a blanket fertilizer recommendation rate which is not sensitive to the actual crop needs. Field experiments were conducted in Birunga, Mudende [L1] and Buberuka, Rwerere [L2] highl...
ABSTRACT Moisture deficit limits yam production. Availability of drought tolerant yam will improve yield and expand area of production. Soil inoculation with Arbuscular Mycorrhizae Fungi (AMF) improves tolerance of plants to drought. However, there is limited information on the response of yam to drought and AMF inoculum. This study was conducted to identify drought tolerant yam accessions and determine the effects of AMF. Two glasshouse and one field experiments were conducted, each in ...
ABSTRACT Adverse soil moisture deficit as a result of high ambient temperatures and high velocity June winds at critical stages of maize growth had been singled out as the most important factor limiting maize yield in Coastal Kenya during long rain season. This study was carried out to study the effect of foliar applied kaolin and coir dust mulch on evapotranspiration and yield of Pwani hybrid 4 maize. A 2x2x4x3 split-split plot design experiment, replicated thrice was set at Pwani University...
ABSTRACT Russian wheat aphid (Diuraphis noxia Kurdjumov) (RWA) and the emergence of stem rust (Puccinia graminis Pers. f.sp. tritici ) race TTKSK (‘Ug99’) in Kenya are currently some of the most binding constraints to wheat production in Kenya. Severe infestation by RWA may result in yield losses of up to 90% in commercial wheat cultivars while ‘Ug99’ infected plants may suffer up to 100% loss. The two pests combined have seriously affected wheat farmers forcing them to heavily rely o...
Field experiments were conducted for two successive rainy seasons (2014/15 and 2015/16) and for two successive irrigated winter seasons (2014/15 and 2015/16) in sandy soil at experimental Farm, Faculty of Natural Resources and Environmental Studies, University of Kordofan, Elobeid. The aim of this study was to evaluate 10 forage Sorghum genotypes under rain-fed and to investigate the effect of these 10 genotypes and watering interval (7 and 10 days) under irrigation on growth, yield and...
Afield and a pot experiment wereconductedin season2016
This study was carried out to assess the variation in morphological and yield traits for 13 sorghum germplasm. A field experiment was executed during winter season of 2015 at the demonstration farm of the faculty of Agriculture, University of Khartoum, Shambat. Sorghum accessions were morpho-agronomically characterized by using the sorghum descriptors lists from the International Board of Plant Genetic Resources, IBPGR/ICRISAT (1993) as reference for the observations. The agronomic perf...
Research experiment and field survey were conducted during 2016 – 2018 to study the effect of variety and nitrogen fertilization on the agronomic andquality performance of Rhodes grass and to investigate the husbandry practices of Rhodes grass in the major production systems in the Sudan. The experiment was conducted in Shambat (2016-2017) in the demonstration farm of the College of Agricultural Studies, Sudan University of Science and Technology. Two Rhodess grass varieties (Fine Cu...
Abstract Cotton production is generally declining due to several limitations which include climate variations, poor crop management and biotic stress factors. Of the biotic stress, diseases are a major limiting factor of cotton production. Verticillium wilt is one of the most important disease and is an economically important fungal disease causing significant losses to seed cotton yield in Zimbabwe. Varietal development for resistance in cotton requires the understanding of the underlying ge...
ABSTRACT The need to provide sufficient protein food for an increasing population that is mainly resource poor requires opening up of marginal land for growing appropriate pulses such as chickpea. An experiment was carried out at KARI-Naivasha situated at an altitude of 1900 m, characterized with clayey to sandy loam soils in a split plot of randomized complete block design over two seasons (December 29, 2004 to May 26, 2005 and June 21 to November 15, 2007). The objective was to investigate ...
ABSTRACT Irish potato is a cool-season crop that require low temperatures for high yields. In potato production tuberisation is an important and complex process. High temperatures reduce successful cultivation of potato in the lowveld of Zimbabwe because they tend to promote vegetative growth at the expense of tuber production. High temperatures may increase in gibberellin activity that inhibits tuberisation.To overcome this problem paclobutrazol can be used to overcome the inhibitory effect...
ABSTRACT Potato is one of the most widely grown tuber crop that contribute significantly to human nutrition and food security. Potato is a cool season crop and high temperatures are inhibitory to tuberization resulting in low yields. This is mainly due to production of high levels of gibberellins at high temperatures that promote vegetative growth at the expense of tuberization. The balance of hormones that control tuberization can be managed by using anti-gibberellin synthesis such as paclob...
ABSTRACT Field experiment was conducted on naturally Striga hermonthica infested field in the Kassena-Nankana East District of the Upper East Region during the 2018 cropping season. This was to investigate effects of Striga tolerant pearl millet varieties intercropped with cowpea on S. hermonthica, crop yield and yield components. The study was a 4 x 3 factorial experiment consisting of four pearl millet varieties (Akad kom, Kaanati, Naad kohblug and Waapp naara) and three cropping patterns (...
ABSTRACT Drought stress and striga parasitism are major constraints to maize (Zea mays L.) production in Northern Ghana. Two experiments were conducted to screen some genotypes of maize for tolerance to drought and Striga hermonthica at Nyankpala in the Guinea Savanna agro ecological zone of Ghana. In Experiment 1, seeds were planted in pots of 0.01 m3 volume arranged in rows on a platform in a screen house at Nyankpala. Genotypes were replicated three times in a completely randomized desig...