Browsing Faculty of Agriculture Environment and Food Systems e-Theses Collection by Issue Date
Now showing items 21-40 of 105
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Combining Ability Analysis for Early Maturity and Phaeosphaeria Leaf Spot Resistance in Regional Maize Germplasm
(2012-08-30)Phaeosphaeria leaf spot (P. maydis Henn.) disease has the potential to cause substantial yield losses in maize (Zea mays L,). Maize is grown by smallholder farmers without fungicides; hence the need to breed for resistance ... -
Relationship of molecular genetic distance of seven quality protein maize (Zea mays L.) inbred lines with specific combining ability and grain yield of hybrids
(2012-08-30)Quality protein maize (QPM) with the opaque-2 gene has double the amount of the essential amino acids (tryptophan and lysine) as compared to normal endosperm maize but the gene is associated with undesirable agronomic ... -
Effects Of Grain Legume Species And Cowpea ( Vigna unguiculata L. Walp ) Populations On Witch Weed ( Striga asiatica L. Kuntze ) Phenology In The Smallholder Farming Sector Of Zimbabwe
(2012-08-30)Two on-farm experiments were conducted in Eastern Zimbabwe`s Chinyika Resettlement Area (180 02" and 180 17" S and 320 09" and 320 24" E), during 2002/2003 rainy season, to evaluate the effects of three grain legumes ... -
Effects of Foliar Fertilizer Application during the Seed filling period on Soyabean (Glycine Max (L) Merr.) Grain Yield and Seed Quality
(2012-08-30)One major factor that prevents widespread adoption of soyabean (Glycine Max (L) Merr.) has been attributed to low yields. A research study focusing on the development of technologies to increase soyabean productivity and ... -
Evaluation and characterisation of twenty-two Soyabean [Glycine max (L) MERRILL] lines under rust infested and non-infested conditions
(2012-08-30)Soyabean [Glycine Max (L) Merril] is an important leguminous crop, mainly used for human nutrition and livestock feed, as well as improving soil. The major constraint or threat to soyabean production is soyabean rust, a ... -
Assesment of Sustainability of Different Populations of Stemborer Species for the Development of Cotesia Flavipes (Hymenoptera: Braconidae) and the Establishment of the Latter in Zimbabwe.
(2012-08-30)Maize and sorghum are very important crops in Zimbabwe. They are, however, attacked by several pests, among them stemborers. Host suitability studies using Cotesia flavipes Cameron (Hymenoptera: Braconidae) against Chilo ... -
Improving maize (Zea mays L.) growth and yield using Jatropha (Jatropha curcas L.) seed cake under Zimbabwean soil condition
(2012-08-30)A research study exploring the use of jatropha seed cake as a sole source of nutrients and used in combination with inorganic N fertilizer was conducted on station at Henderson Research Station on sandy and clayey soils ... -
Temporal and Spatial Variability of the Hydrology of Semi-Arid Zimbabwe and its Implications on Surface Water Resources.
(2012-08-30)There are 170 Communal lands, totaling 163 500 km2 or 42% of Zimbabwe. About 75% of these Communal lands are in Natural regions IV and V that are semi-arid. Water development is therefore a key aspect in ensuring sustainable ... -
The Search for Molecular Markers, Parental Characterisation and inheritance Studies of Witchweed [Striga Asiatica (L.) Kuntze] Resistance in Sorghum [Sorghum Bicolor (L.) Moench].
(2012-08-30)Sorghum [Sorghum bicolor (L.) Moench] is ranked the third most important cereal crop in Zimbabwe, after maize and wheat. The major biotic constraint to sorghum production by resource poor farmers (RPFs) is attack by the ... -
Genetic variability, host specificity and resistance in Striga Asiatica-host plant interactions
(2012-08-30)Genetic analyses were conducted on Striga asiatica populations collected from different host species and geographic areas throughout Zimbabwe. These collections had been suspected to differ in their virulence, leading to ... -
Genotype X Environment Interaction Effects on the Developmental Time, Kernel Modification and Yield of Experimental Quality Protein Maize (Zea mays L.) hybrid Varieties
(2012-08-30)Genotype „e environment interactions occur in crops grown in more than one environment such that it is unusual for a single genotype to perform better than other genotypes at all the locations in which they are grown posing ... -
INTERCROPPING AND LEAF HARVEST MANAGEMENT FOR IMPROVED LEAF YIELDS IN TWO TRADITIONAL VEGETABLES: PUMPKIN (Cucurbita maxima L.) AND MUSTARD RAPE (Brassica juncea Czern.) IN ZIMBABWE.
(2012-08-30)Studies were carried out to establish ideal component combinations and relative populations, relative planting dates, leaf harvest practices and the effects of nitrogen in intercrops involving food crops (maize and groundnut) ... -
Evaluating Hybrid-Maize Simulation Model for Grain Yield Estimation in Hybrid Seed Maize Production
(2012-08-30)The study was carried out to determine the effect of Male Planting Date (MPD) and Female Plant Population (FPP) on the Grain Yield (GY), yield components and flowering of a three-way hybrid. The study also evaluated ... -
Identification of Fungal Seed Borne Pathogens in Farm Saved and Certified Seed of Sorghum (Sorghum Bicolor (L.) Moench) and Evaluation of the Incidence and Severity of Seed Borne and Non-seed Borne Disease in the Field.
(2012-08-30)A study to identify fungal seed borne pathogens on sorghum seed samples and to assess seed to field transmission of these pathogens was carried out at the Crop Science Department in the 2003/04 season. Seed samples collected ... -
Mineral Nutrition and Integration of Forage Legumes into Smallholder Farming Systems, with Emphasis on Velvet Bean [Mucuna pruriens (L) DC var. utilis].
(2012-08-30)The major objective of this work was to evaluate and compare forage supply and soil fertility effects of velvet bean (Mucuna pruriens var. utilis) integrated into smallholder cropping systems as ley, intercrop and green ... -
Characterisation, Epidemiology and Control of Scab on Protea Spp. Caused by Elsinoe Spp. (Anamorph Sphaceloma Protearum).
(2012-08-30)Protea scab, a commercially important disease of Protea spp., is discernable by raised, circular to oval, red – black leaf and stem lesions, which distort young plant growth. The causal agent was determined to be Sphaceloma ... -
Evaluation of Draught Animal Power Systems for Maize and Cotton Production at Smallholder-Farmer Level in Masvingo Province.
(2012-08-30)An evaluation of smallholder draught animal power systems was conducted in six study areas in Masvingo and Chivi districts of Masvingo province over two seasons 1999-2000 and 2000-2002. The objective was to investigate the ... -
“ Heterosis, Combining ability and Tester Identification of CIMMYT maize (Zea Mays L) adapted to low N conditions
(2012-08-30)The production of high yielding single cross maize testers with good combining ability and the potential to discriminate materials under evaluation across diverse environments, is important in breeding programs. Testers ... -
The Effects of Improved Fallows and Tillage Management on Soil and Water Conservation in a Sandy Soil.
(2012-09-03)Research on improved fallows has concentrated on soil fertility benefits neglecting possible benefits to soil and water conservation. The objective of this study was to determine changes in infiltration rates, water and ... -
Tolerance of Selected Maize (ZEA MAYS L.) and Soyabean (Glycine Max L. Merr.) Cultivars to Soil Acidity
(2012-09-03)Soil acidity is the most important growth-limiting factor especially in the tropics and sub-tropics. Increased acidity in Zimbabwe’s smallholder agricultural soils has been attributed to use of acidifying fertilizers without ...
