ABSTRACT Potato production is hindered by pathogens like Pectobacterium carotovorum that cause blackleg in the field and soft rot after harvest. The purpose of this study was to determine the possibility of integrating Tagetes minuta and Capsicum frutescens extracts in the management of soft rot and blackleg in potatoes. The research was conducted at the horticulture research and teaching laboratory and field of Egerton University, Njoro. In vitro and in vivo experiments were set up in a Comp...
ABSTRACT Carnation growers heavily use mineral fertilizers and plant growth regulators to obtain desirable stem length, girth and flower head size against Global GAP. This dependency on inorganic fertilizers and synthetic chemicals adversely pollute the environment. While there are limited alternatives to inorganic fertilisers for meeting the nutritional requirements of crops, organic products for regulating plant growth and development are lacking in some crops. The main objective of this st...
ABSTRACT Tomato (Solanum lycopersicum L.) is a nutritious vegetable consumed worldwide. Open field production faces a number of constraints including biotic and abiotic stresses. The general objective of the study was to enhance tomato productivity through provision of an alternative pest control and protected cropping system that is relatively affordable to small scale farmers. The study entailed a field production and laboratory postharvest experiment at the Horticulture Research Field, Ege...
ABSTRACT Sage (Salvia officinalis L.) belongs to Lamiacea family. It is well known as a common medicinal and aromatic plant widely used in food as well as herbal medicine products. It has wide applications in food flavouring, cosmetics and perfumery by the use of its essential oil. In Kenya, it is increasingly becoming important mostly being grown by export farms. Its leaf productivity is however often limited by nitrogen and phosphorus, which are deficient in many Kenyan soils. The problem i...
ABSTRACT Blackberry (Rubus L. sub-genus Rubus Watson) fruits grow wild in Kenya; though in some parts of the world they have been adopted and are cultivated commercially. However, limited information is available regarding, growth characteristics, fruit yield and quality of wild species growing in Kenya under conventional production. The objective of the study was to contribute towards increased blackberry cultivation, by evaluating the performance of wild blackberry species under conventiona...
ABSTRACT French bean (Phaseolus vulgaris L.) is among the leading export vegetables in Kenya, intensively grown by small scale farmers. Despite the economic importance of the crop, many growers are still not able to achieve maximum yield and quality due to unfavourable weather and heavy infestation by insect pests as the crop is predominantly grown in open fields. Coloured net technology is an emerging technology, which introduces additional benefits on top of the various protective functions...
ABSTRACT The research tested the potential of Tagetes patula, Lantana camara, Tephrosia vogelii and Azadirachta indica to manage root knot nematodes and weeds on greenhouse grown Asclepias tuberosa. Field trials were conducted at James Finlay’s (K) Flowers-Kericho for two seasons under greenhouse conditions. The experiment was laid in Complete Randomised Block Design replicated three times. Chopped plant materials were applied singly as soil amendment or in combination with nemacur. T....
ABSTRACT Calla lily (Zantedeschia sp.) is cultivated as a cut flower, pot plant or garden ornamental throughout the world and contributes to horticultural revenue for many countries including America, Holland, New Zealand and Kenya. However, bacterial soft rot caused by Pectobacterium carotovorum subsp. carotovorum affects the commercial viability of this crop in Kenya. The disease infects calla lily at all stages of growth resulting in death of plants and decay of tubers. Bactericidal formul...
ABSTRACT Rose cut flower production contributes significantly to Kenya’s economy and its quality is therefore paramount for sustainability on the export market. Despite the tremendous contribution, profitable production of cut rose flower is limited by unsuitable growth conditions which lead to low quality produce. A study was set up at Egerton University to investigate sustainable ways to improve growth and quality of rose cultivars through integration of greenhouse growth conditions and c...
ABSTRACT African horned melon (Cucumis metuliferus) is an indigenous crop belonging to the family Cucurbitaceae. The crop has been neglected despite its high potential. Therefore, to conserve the biodiversity of this crop, there is need to promote its domestication and production. However, this can only be realized if its morphology, agronomic and nutritional value is understood. The objective of this study was to determine the agro-morphological performance and nutritional composition of hor...
ABSTRACT African horned melon (Cucumis metuliferus) is an indigenous crop belonging to the family Cucurbitaceae. The crop has been neglected despite its high potential. Therefore, to conserve the biodiversity of this crop, there is need to promote its domestication and production. However, this can only be realized if its morphology, agronomic and nutritional value is understood. The objective of this study was to determine the agro-morphological performance and nutritional composition of hor...
ABSTRACT Tea provides income and employment to rural populations in many countries. Tea, grown in east and west of the Rift Valley, is the leading export commodity crop in Kenya. Variable responses among genotypes to different environments and fertilizer influence growth, productivity, leaf nutrients, and quality. However, husbandry practices are uniform in all tea growing regions. These recommendations may not be optimum universally. Genotypes planted and management practices may therefore n...
ABSTRACT The melon fly, Zeugodacus cucurbitae (Coquillett), is a serious pest of cucurbits, tree fruits and related crops in most continents of the world, including Africa. To manage the pest, most farmers in sub-Saharan Africa rely on synthetic chemicals which have detrimental effects to the environment and the habitat. Excessive use of chemicals may also lead to development of pest resistance and Z. cucurbitae has reportedly shown the most increased resistance to the used insecticides. For ...
ABSTRACT Nitrogen deficiency is a major limiting factor for maize production in western Kenya, therefore, nitrogen fertilizer inputs are required to increase yields in the region. However, most resource poor farmers use low rates of inorganic fertilizers leading to low maize yields. While high rates of inorganic fertilizer application may increase yields, they are however associated with low nitrogen use efficiency (NUE) and emission of greenhouse gases (GHGs) to the environment. Cattle manur...
ABSTRACT Agricultural pesticides use is rising in crop protection against plant invaders of which fungi are chief in reducing both yield quantity and quality. Botrytis cinerea, Rhizoctonia solani, Macrophomina phaseolina and Alternaria alternata are polyphagous fungi of economic importance with severe yield and quality losses worldwide. Environmental concerns on pesticide use and their resistance now on a worldwide scale. Extensive studies of plant secondary metabolites have not exhausted the...