Research Papers/Topics in Crop Science

Effects of Pelleted and Unpelleted Composted Organic Materials on the Growth and Yield of Three Varieties of Cucumber (Cucumis Sativus L.)

ABSTRACT The main objective of this study is to determine the effects of the pelleted and unpelleted composted organic materials on the growth and yield of three varieties of cucumber (Cucumis sativus L.). The specific objectives were to: determine the physical and chemical properties of pelleted and unpelleted composted organic materials, determine the effects of pelleted and unpelleted composted organic materials on the growth and yield of three varieties of cucumber (Cucumis sativus L.) an...

Studies on the Genetic Pathway and Selection Response for Increased Fruit Size and Yield in Tomato (Solanum Species) Using a Modified Three - Way Cross.

ABSTRACT Modified three - way crosses involving advanced interspecific tomato hybrids (F12) and commercially cultivated tomato varieties namely Supersteak (S), Beef (Florida) (BF) and Plumb (Rio grande) (PR) were made to generate F1 hybrids. The F1 hybrids were crossed to both the pollen and seed parents to produce the backcrosses and were also allowed to random mate to produce the F2 and F3 populations. The parents, F1s, F2s, F3s and backcrosses were evaluated under rainfed conditions. Flora...

Evaluation of Trap Crops and Integrated Striga Management in the Control of Witch Weed (Striga Hermonthica (Del.) Benth) in Sorghum (Sorghum Bicolor L. Moench)

ABSTRACT Field trials were conducted in 2012 and 2013 cropping seasons on a naturally heavily striga infested field at the research farm of Federal University of Technology, Gidan kwano campus Minna to evaluate the effect of seed treatment, sowing date and trap crop in the management of Striga hermonthica. The experiment consisted of two varieties of sorghum (resistant ICSV1002 and susceptible Gwari local varieties), three different concentration of Parkia pulp powder (0, 66 and 100 g/l) and ...

Horticultural Characterization of Five Accessions of African Walnut (Plukenetia Conophorum Mûell Arg)

ABSTRACT Plukenetia conophorum Muell Arg commonly called African walnut is cultivated principally for the nuts which are cooked and consumed as snacks. The plant serves many nutritional and medicinal purposes yet its availability is on the decline. To preserve and ensure continued availability of P. conophorum, there is the need to develop propagation protocols for the plant. Five accessions were collected from Mbu, Nsukka, Orba and two locations in Edem-ani all in Enugu State, Southeastern, ...

Studies on the Leaf Spot Disease of Eggplant (Solanum Aethiopicum L.) and Its Management with Some Botanicals

ABSTRACT Field, greenhouse and laboratory studies were carried out at the Department of Crop Science, University of Nigeria, Nsukka in order to evaluate the leaf spot disease of eggplant and its management with some botanicals. Field survey of diseased plants was conducted on eggplant farm. Solanum aethiopicum L. plants were sampled on every 1 m distance along the diagonal transects for disease incidence and severity. Pathogen isolation from severely infected leaves was carried out in the lab...

Response of Soybean and Maize Varieties to Different Soil Fertility Management Options in Southeastern Nigeria

ABSTRACT Promiscuous (naturally nodulating) IITA (International Institute of Tropical Agriculture) soybean (Glycine max (L) Merrill) varieties and elite varieties of maize (Zea mays L.) were evaluated in four experiments between 2007 and 2009, for their growth and yield responses to an area without history of soybean cultivation, some soil fertility management options and for soybean fertilizer replacement value (FRV) to companion and subsequent non-legume maize crop. These experiments were c...

Simple Sequence Repeat (Ssr) Genetic Analysis of Cassava Mosaic Disease Resistance in Selected F1 Populations of Cassava

ABSTRACT Cassava mosaic disease caused by begomoviruses is the most widespread disease of cassava in Africa. Simple sequence repeat (SSR) genetic analysis of an F1 population of cassava was carried out to identify new sources of CMD resistance. Genomic DNA extracted from parents and progeny was amplified using polymerase chain reaction (PCR). PCR amplifications were run on polyacrylamide and agarose gels. SSR marker technology was used to identify markers linked to CMD resistance via bulk seg...

Management of Fungal Diseases Associated with Germination and Growth of Moringa Oleifera Lamarck with Botanicals

ABSTRACT Studies were carried out at the Department of Crop science, University of Nigeria Nsukka (UNN) to evaluate botanicals control of diseases associated with growth and germination of Moringa seeds. Five accessions of Moringa seeds collected from Imo, Enugu, Kogi, Plateau and Kaduna states of Nigeria were used. The following experiments were carried out: seed viability test, isolation of fungal pathogens, determination of phytochemicals, in vitro control of the pathogens with six botanic...

The Use of Ionizing Radiation from 60co Gamma Source in Controlling Moldiness in Dried Cocoa Beans

ABSTRACT Mouldiness in stored cocoa beans in Ghana and the production of aflatoxin have been studied. Based on actual weight of discarded beans, mouldy beans have been estimated to constitute 0.13 % and 0.00002 % of marketable beans at the farm ers’ level and the buying agents’ depots respectively in the Tafo District. This is contrasted with an estimated value o f 0.16 % obtained in a questionnaire type study involving farmers. Estimated mouldy beans at the Tema port was 0.69 % per year...

Assessment of Phenotypic Diversity and Farmers‟ Knowledge of Cultivation and Utilization of Pigeon Pea [Cajanus Cajan (L.) Millspaugh]

ABSTRACT Pigeon pea plays a significant role in smallholder farmers‟ subsistence. In Benin, there is a dearth of information on the genetic diversity present in the crop. Indigenous knowledge used in folk medicines, taxonomy, crop management and seed system have not been assembled and documented. This study aimed at assessing farmers‟ knowledge related to pigeon pea cultivation and uses and genetic diversity of pigeon pea germplasm in Benin. Participatory Rural Appraisal including indivi...

Growth of Cocoa Seedlings as Affected by Different Growth Media and Different Polybag Sizes

ABSTRACT A study was conducted to determine the effects of different growth media and different poly bag sizes on the growth of cocoa seedlings in the nursery. The experimental design was split plot design with three replicates. The treatments were soil (S), carbonated rice husk (CRH), cocoa pod husk (CPH), cocopeat (CP) , sawdust (SD), S+CRH, S+CPH, S+CP, S+SD, CRH+CPH, CRH+CP, CRH+SD, CPH+CP, CPH+SD, CP+SD and the three polytene bag sizes were 12.5 cm x 18.5 cm (small), 10.0 cm x 35.0 cm ...

Assessment of Variability in Fruit Quality Characteristics and Levels of Some Bioactive Compounds in African Eggplant (Solanum Aethiopicum L.) Germplasm in Ghana

ABSTRACT  In order to determine genetic variability in some accessions of Africa eggplant, open field experiments were conducted in two separate locations, one at University of Ghana farm, Legon and the other at the Forest and Horticultural Crops Research Centre (FOHCREC), OkumaningKade simultaneously. The experimental design used was the Randomized Complete Block Design (RCBD) with three (3) replications. The combined analysis of variance was carried out for the data gathered. The effect of...

APPLICATION OF VIBRATION TECHNIQUE FOR THE CONTROL OF PHYSICAL PROPERTIES OF YAM (Dioscorea spp.) SPROUTS DURING STORAGE IN FUNAAB, NIGERIA ENVIRONMENT

Early sprouting of yam tuber is a typical problem during storage resulting into weight losses, deterioration, shrinkage and reduction in quality. This research work therefore carried out investigation on the application of vibration technique for the control of physical properties of yam (Dioscorea spp.) sprouts during storage in FUNAAB, Nigeria environment. The physical properties (length, number and weight of sprout, number of leaves and weight of roots) of the yam sprouts were determi...

PATHOGENICITY OF Meloidogyne incognita AND Fusarium oxysporum f. sp. lycopersici ON GROWTH, YIELD AND WILT SEVERITY IN TWO VARIETIES OF TOMATO (Solanum lycopersicum L.) IN GHANA

ABSTRACT The pathogenicity of fungus, Fusarium oxysporum f. sp. lycopersici and nematode, Meloidogyne incognita on growth, yield and wilt severity was studied on two tomato varieties, Mongal F1 and Petomech in a randomized complete block design, factorial experiment with three replications on the University of Ghana and National service farms from July 2018 to June 2019. Each plot had an area of 10 m2 with 25 plants. Fusarium inoculum of 1.3×106 cells per 5 mL was inoculated on fields natur...

Seasonal Abundance Of Amaranth Lepidopteran Defoliators And The Role Of Indigenous Parasitoids And Phenylacetaldehyde In Their Control In Nairobi County, Kenya

ABSTRACT Amaranth is one of the African indigenous vegetables that is gaining popularity due to its nutritional, medicinal and economic values. Its potential as a source of food security in East Africa and most parts of the world has heightened demands for the once neglected crop. In Kenya and Tanzania, the Lepidopteran defoliators are important pests of the crop which can cause up to 100% yield loss. Little information on the population dynamics of these pests make their management difficul...


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