Research Papers/Topics in Crop Science

Juvenile Morphological Markers for Maleness in Fluted Pumpkin (Telfairia Occidentalis Hook F.)

ABSTRACT  Six hundred seeds extracted from nine pods of fluted pumpkin (Telfairia occidentalis Hook F.) were sown in the field in 2004 and 2005 to determine the juvenile morphological markers for maleness. The results showed a significant difference (P < 0.05) between the male and female fluted pumpkin with respect to days to tendril emergence. The mean number of days to tendril emergence for the males was 19 (in 2004) and 20 (in 2005) days after planting while that of the females was 47 (in...

Studies on Aspects of Reproductive Biology and Pod Yield in Bambara Groundnut (Vigna Subterrenea (L.) Verdc)

ABSTRACT Two field experiments were conducted in April and August, 2007 cropping season at the Department of Crop Science research farm, University of Nigeria, Nsukka, to evaluate the pollen germination potentials, rate of pollen tube growth, floral, agronomic and yield attributes of thirteen bambara groundnut cultivars. The first experiment (early planting) was in April and the second (late planting) was in August 2007. The results obtained showed that 10 genotypes had significant effect on...

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 botan...

Planting Time, Spray Regime, Disease Expression and their Impacts on Six Cucumber Lines in a Derived Savanna Agroecology of Nsukka, Southeastern Nigeria.

ABSTRACT  Cucumber (Cucumis sativus L.) belongs to the Cucurbitaceae family. It is a major vegetable crop worldwide and develops rapidly, with a shorter time from planting to harvest than most crops. It is a monoecious annual climber or creeper that has been cultivated for over 3,000 years and is still widely cultivated today. The fruit is soft, succulent with high water content, roughly cylindrical and elongated with tapered ends. The plant shades one another, being allowed to creep on the ...

Studies on Fertilizer Nitrogen and Cutting Management of Sown Grass and Legume Pastures in Pure and Mixed Swards.

ABSTRACT  Three field experiments were conducted at the Teaching and Research Farm of the Department of Crop Science, Faculty of Agriculture, University of Nigeria, Nsukka. In the first experiment, the effects of fertilizer-N application and cutting management on establishment, growth and yield of guinea grass (Panicum maximum) were investigated. The experiment was a 4 x 4 factorial laid out in a randomized complete block design with three replications. Treatments comprised four levels of Ni...

Utilization of Wild Tomato Relative for the Development of Improved Tomato Lines for High Humidity Environment.

ABSTRACT An effort to obtain a tomato cultivar that would adapt to high temperature and high humidity condition in the southern part of Nigeria in order to increase tomato yield in this part of the country has been in progress for the past nine years (2000-2008).The research was carried out at the Faculty of Agriculture Research Farm, University of Nigeria, Nsukka located in the derived savanna zone latitude 0.6o 52, N, longitude 07o 24, E, 447.26 m altitude. Three cultivated tomato varieties...

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...


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