National Horticultural Research Institute

Ibadan, Nigeria

National Horticultural Research Institute

Ibadan, Nigeria
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Amao I.O.,National Horticultural Research Institute | Egbetokun O.A.,Institute of Agricultural Research and Training
International Journal of Vegetable Science | Year: 2017

Market participation provides opportunities to farmers to benefit from trade by selling surplus produce and purchasing needed goods and services. Benefits and challenges to market participation faced by leafy vegetable farmers include lack of information about the markets and high transportation and transaction costs, among others, which do not allow leafy vegetable farmers to efficiently participate in markets. The study examined transaction costs involved in market participation by leafy vegetable farmers. Seventy leafy vegetable growers were randomly sampled. Data collected were analyzed using descriptive statistics and a probit regression model. Most farmers were male (55.7%), between 41 and 50 years (40.0%), and married (88.6%). A majority of farmers (56.2%) had access to communication assets, 70.5% were not involved in group marketing, 76.8% source information from neighboring farmers, and 50.8% require information on buyer characteristics. Gender, years of experience in leafy vegetable production, being involved in group marketing, land ownership, and farm size all determine probability of market participation among leafy vegetable farmers. © 2017 Taylor & Francis Group, LLC

Oni O.A.,University of Ibadan | Adeoye I.B.,National Horticultural Research Institute
International Journal of Vegetable Science | Year: 2016

An effective credit system is essential for agricultural value chain development. It facilitates fulfillment of venture potential through access to appropriate technology. There is little information on credit accessibility among vegetable marketers and other participants in the value chain such as the input suppliers, processors, and transporters. Factors that drive participation of vegetable marketers in formal and informal credit sources were studied. A total of 480 retail vegetable marketers in major markets in Ibadan, Oyo State, Nigeria, were respondents. Primary data on socioeconomic characteristics, credit sources, and types of sources of credit were collected. Data were analyzed using descriptive statistics and logit regression. Most (83%) vegetable marketers were female and 31–40 years old (31%–67%). A minority of marketers had no formal education (38.13%) and were married (81.6%). Informal credit was accessed by 45.63% of the marketers, formal credit by 40.62%, and 13.75% had no access to any kind of credit. Marketers in the age range of 41–50 years (12.91%) had most access to formal credit; those aged 31–40 years had most access to informal credit (13.54%). Factors driving participation in formal credit were years of education, interest rate, and ease of application procedure; repayment time and ease of application influenced participation of marketers in the informal credit system. Informal credit was mostly available to marketers due to ease of application processing and repayment procedure. © 2016 Taylor & Francis

Ajibola A.T.,Ladoke Akintola University of Technology | Modupeola T.O.,National Horticultural Research Institute
Journal of Plant Sciences | Year: 2014

The field experiment was conducted during at the Teaching and Research Farm, Ladoke Akintola University of Technology, Ogbomoso, Nigeria. To evaluate the rate of Amaranth growth to different plant based mulching materials and their response to weed infestation. There were three plant materials incorporated into the soil which are tithonia, neem, gliricidia with four weed levels being weed free, weed once, weed twice. They were replicated three times making a total of thirty-six experimental plots. The experiment was laid out in a Randomized Complete Block Design (RCBD), data collected was subjected to Analysis of Variance (ANOVA) and means were separated using Duncan Multiple Range Test (DMRT) at 5% probability level. Results from the experiment showed that better growth and yield of amaranth was obtained in the weed free plot. Both duration of weed eradication and weed infestation had significant effect on plant height, stem girth and yield of amaranth. In general, all these parameters increase as the duration of weed amaranth competition decreased, while growth parameters increase with an increase in weed eradication. However, highest value was obtained from tithonia mulch plots and neem mulch produced the lowest value on plant height and yield while gliricidia mulch gave the lowest value of stem girth. © 2014 Academic Journals Inc.

Akinyemi S.O.S.,National Horticultural Research Institute | Aiyelaagbe I.O.O.,Abeokuta Federal University of Agriculture | Akyeampong E.,World Vegetable Center
Acta Horticulturae | Year: 2010

Plantain (Musa spp.) occupies a strategic position for rapid food production in Nigeria. It is ranked third among starchy staples. The country's output doubled in the last 20 years. Production, which is concentrated in the Southern part of the country, still remains largely in the hands of small scale farmers who, over the years, have ingeniously integrated it into various cropping systems. Production is male dominated, while women essentially handle marketing. The inadequate knowledge of improved cultural practices of the crop by the farmers, an inefficient system of extension services and skewness of specialization in areas of research are part of the reasons why yield potential of plantain is still low in the country. Contributions of plantain to the income of rural households in major producing areas in Nigeria continue to increase tremendously in the last few years. Unlike some other starchy staples whose demand tend to fall with rising income, demand for plantain increases with increasing income. With the potential for industrial processing of plantain, which has recently been adopted, and the increased interest in production by small and large scale farms in the country, it is believed that Nigeria will continue to be one of the world's largest producers of plantain.

Ibitoye D.O.,National Horticultural Research Institute | Akin-Idowu P.E.,National Horticultural Research Institute
African Journal of Biotechnology | Year: 2011

Mapping and tagging of agriculturally important genes have been greatly facilitated by an array of molecular markers in crop plants. Marker-assisted selection (MAS) is gaining considerable importance as it would improve the efficiency of plant breeding through precise transfer of genomic regions of interest (foreground selection) and accelerate the recovery of the recurrent parent genome (background selection). MAS have been widely used for simple inherited traits than for polygenic traits, although there are few success stories in improving quantitative traits through MAS. They are been used to monitor DNA sequence variation in and among the species and create new sources of genetic variation by introducing new and favourable traits from landraces, wild relatives and related species and to fasten the time taken in conventional breeding, germplasm characterization, genetic mapping, gene tagging and gene introgression from exotic and wild species. The success of MAS depend on many critical factors such as the number of target genes to be transferred, the distance between the target gene and the flanking markers, number of genotypes selected in each breeding generation, the nature of germplasm and the technical options available at the marker level. The power and efficiency of genotyping are expected to improve with the advent of markers like single nucleotide polymorphisms (SNP). Although genetic maps have been developed for most important fruit and vegetables species and a number of horticulturally important gene loci have been tagged, only a few are reported. New, easy to perform allele testing methods are needed to bridge this large gap between marker development and application. This review discusses the basic requirements and the potential applications of MAS and the significance of integrating MAS into conventional plant breeding programmes. © 2011 Academic Journals.

AdeOluwa O.O.,National Horticultural Research Institute | Amao I.O.,Jericho Systems
International Journal of Vegetable Science | Year: 2016

Golden sweet melon (Cucumis melo L. var. Golden sweet) is an underused member of the melon family. The study was undertaken to assess consumer knowledge of the crop. Data were collected from 160 respondents using questionnaires. Descriptive and inferential statistics were used to analyze results. Most respondents were male with advanced education. About 70% did not know that golden sweet melon existed; only 16.3% had consumed it. The lack of knowledge of the crop is likely due to it not being common among marketers. To improve consumer consumption, increased knowledge that the crop exists is needed. © 2016 Taylor & Francis

Arogundade O.,National Horticultural Research Institute | Balogun O.S.,University Of Ilorin | Kareem K.T.,National Horticultural Research Institute
Virology Journal | Year: 2012

Viral diseases constitute obstacles to pepper production in the world. In Nigeria, pepper plants are primarily affected by pepper veinal mottle virus (PVMV), Cucumber mosaic virus (CMV), Pepper leaf curl Virus (TLCV), Tobacco mosaic virus (TMV), Pepper mottle virus (PMV) and a host of other viruses. The experiment was carried out with a diagnostic survey on the experimental field of the National Horticultural Research Institute, Ibadan, Nigeria and on pepper farms in six local government areas within Ibadan Oyo State, Nigeria, forty samples were collected from each of the farms. Diseased samples were obtained from the field and taken to the laboratory for indexing. In ELISA test some of the samples from the pepper farms showed positive reaction to single infection with PVMV (36.79%), CMV (22.14%) while some others showed positive reaction to mixed infection of the two viruses (10%) but some also negative reaction to PVMV and CMV antisera (31.07). © 2012 Arogundade et al; licensee BioMed Central Ltd.

Adegbite O.,National Horticultural Research Institute | Adeoye I.B.,National Horticultural Research Institute
Agris On-line Papers in Economics and Informatics | Year: 2015

Pineapple is one of the most important fruits in Nigeria and it had been identified that the country has comparative advantage in its production. However, there is need for empirical studies on the technical efficiency of its production. This paper presents the analysis of technical efficiency of pineapple production in Osun state, Nigeria using stochastic frontier production function and resource use efficiency. Primary data was collected from 120 pineapple farmers using multi stage sampling technique. Results revealed that quantity of suckers and labour used in pineapple production was positive and significant at 5% while farm size was significant at 1%. The returns to scale indicated that a unit increase in all the specified production inputs will lead to a more than proportionate increase in pineapple yield by 2.1%. The mean technical efficiency of the pineapple farmers indicated that an average farmer could obtain about 93% of output from a given mix of inputs. The estimated gamma parameter revealed that 81.4% of the variation in output among the pineapple farmers was due to disparities in technical efficiency. Resource use efficiency indicated underutilization of suckers and overutilization of other specified production inputs. The study therefore recommends that farmers should cut down the use of resources that were over utilized and increase the quantity of suckers used in the production of the commodity for optimal productivity.

Adebayo O.S.,National Horticultural Research Institute
Acta Horticulturae | Year: 2011

Tomato (Lycopersicon esculentum) is a major vegetable crop in Nigeria and its culinary use cuts across class and culture, making it a crop of immense popularity. However, tomato cultivation in Nigeria is severely affected by bacterial wilt disease caused by the soil borne pathogen Ralstonia solanacearum. Survey of major tomato producing areas in the southwestern parts of the country showed epidemics of bacterial wilt with high incidences of 60-80% in fields. High yield loss of over 70% was observed in 60% of the fields and tomato cultivation was completely impossible in some areas due to high yield loss. The disease more recently is observed now across major agro-ecological zones in Nigeria. Investigation into the isolation, identification and characterization of the pathogen preceded research efforts aimed towards the control. R. solanaceanum isolates were characterized to belong to race 1 biovar 3. Attempts made in the use of cultural control, host resistance gave variable results while the use of Plant Growth Promoting Rhizobacteria (PGPR) showed promising results. This paper addresses production constraints of tomato as a result of bacterial wilt disease, the research efforts targeted at these constraints are highlighted and recommendations are made on achieving a sustainable control to enhance the production level of tomato.

Yoon J.-Y.,Seoul Womens University | Chung B.-N.,National Horticultural Research Institute | Choi S.-K.,Korea University
Virus Genes | Year: 2011

The variability in the nucleotide (nt) and amino acid (aa) sequences of the coat protein (CP) of Odontoglossum ringspot virus (ORSV), which naturally infects orchids worldwide, was investigated. The CP genes of 48 ORSV isolates originating from different locations in Korea were amplified using RT-PCR and sequenced. The encoded CP consists of 158 aa. The CP sequences of the Korean isolates were compared at the nt and aa levels with those of the previously published ORSV isolates originating from different countries. The Korean isolates share 94.8-100% and 92.4-100% CP identity to ORSV isolates from other countries at the nt and aa levels, respectively. No particular region of variability could be found in either sequence of the viruses. In the deduced aa sequence, the N-terminal region was more conserved than the C-terminal region in ORSV. The phylogenetic tree analysis and recombination analysis revealed that there was no distinct grouping between geographic locations and sequence identity, and nor distinct intra-specific recombination events among ORSV isolates. © 2010 Springer Science+Business Media, LLC.

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