Research Papers/Topics in Crop Science

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...

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 ...

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...

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...

Developing Maize (Zea Mays L.) For Fresh Maize Production In Southeastern Nigeria

ABSTRACT Green (fresh) maize (Zea mays L.) provides food security and income to farmers especially when other crops are still in the field. However, research on green maize variety is scarcely reported in literature or information on suitable genetic material (germplasm) for green maize production. Developing maize for fresh maize production in the southeastern Nigeria was carried out in the Center for Agricultural Research, School of Agriculture and Agricultural Technology, Federal Universi...

Inheritance Of Resistance To Striga Hermonthica (Del.) Benth. In An Open Pollinated Maize Population, Tzl Composite-1 Cl.

ABSTRACT The parasitic weed Striga hermonthica (Del.) Benth. of the Scrophulariaceae family constitutes one of the most economically important biological constraints in maize production in the sub-Saharan regions of Africa. The type of gene action involved in the inheritance of resistance to Striga hermonthica was investigated using the open-pollinated population, TZLComposite-1 Cl in a North Carolina design 1 scheme. Recombination were done among the best families and also the poorest perfo...

To Evaluate The Lethal Effect Of Hexane Extracts Of The Leaves Of Rehan (Ocimum Basilicum) And Lupine Seeds (Lupinus Termis) Against The 3rd Larval Instars Of Spiny Bollworm (Earias Insulana

Abstract This study was carried out in the laboratory of Entomology, Plant Protection Department , College of Agricultural Studies , Sudan University of Science and Technology (SUST) to evaluate the lethal effect of hexane extracts of the leaves of Rehan (Ocimum basilicum) and Lupine seeds (Lupinus termis) against the 3rd larval instars of spiny bollworm (Earias insulana Boisduval, 1833). Also further experiments were conducted to investigate the efficacy of sesame oil as a synergist. Four co...

Planting Time, Spray Regime, Disease Expression And Their Impacts On Six Cucumber Lines In A Derived Savanna Agroecology Of Nsukka, Southeastern Nigeria.

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 ground ther...

Partial Nutrient Balance In Cassava (Manihot Esculenta Crantz) And Soybean (Glycine Max (L) Merril) Intercrop For Sustainable Agriculture In A Derived Savannah Location

ABSTRACT Three field experiments to investigate the partial nutrient balance (N and K) in cassava/soybean intercrop system were conducted at University of Nigeria, Nsukka in a derived Savannah location of South Eastern Nigeria. Effect of fertilizer rate, residual fertilizer and soybean residue management on growth and yield of soybean and cassava and soil nutrient reserve were studied. Soybean growth and yield were significantly affected by their varieties, fertilizer rate and cropping syste...


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