Browsing by Author "Sosanya, O. S."

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    Effect of rainfall and temperature distribution in Yewa North savannah and Onigambari rainforest zones of Nigeria on maize and cassava intercrop
    (2006) Ndubuaku, U. M.,; Adejonwo, K. O.; Sosanya, O. S.; Fayinminnu, O. O.
    This study was carried out in the savannah region of Ayetoro in Yewa North and the rainforest region of Onigambari in Ibadan North to determine the effects of rainfalland temperature distributions on the growth and yield of tropical Zea mays resistant variety with yellow flint (TZSR-Y) in the two ecological zones. The meteorological results showed even distributions of rainfall and temperature at Onigambari rainforest zone in 2004 and 2005 while those of Ayetoro savannah vegetation followed an irregular pattern. There was higher vegetative growth of the maize plants in terms of number of leaves, leaf area, stem height, number and length of internodes. The yield values such as the number and weight of grains per hectare were higher in Ayetoro than Onigambari. There were no significant differences in the moisture contents of the grains in both ecological zones.
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    Efficacy and Gross margin analysis of carbofuran on nematode management in three cultivars of cowpea (Vigna unguiculata (L) Walp)
    (Faman: farm management association of Nigeria, 2007) Sosanya, O. S.; Afolami, C. A.; Fayinminnu, O. O.
    Field trials were carried out in 2000, 2001 and 2002 to study the efficacy of applying carbofuran at 0 kg a.iЛha; 2.4 kg a.i/ha; 3.0 kg aiha and 3.6 kg a.i/ha in the management of nematode populations in the production of three cowpea cultivars: Ife Brown, JT90K- 277-2 and a local premium 'Oloyin'. The 4x3 field trials were laid out in a randomized complete block design replicated three times at the Institute of Agricultural Research and Training sub-station, Ikenne and University of Agriculture (UNAAB) Teaching and Research Farm Abeokuta. Soil nematode population densities were assayed using the Whitehead and Hemming tray method prior to planting and at the end of each experiment. Data collected on number of days to 50% flowering, number of seeds/pods, 100- seed weight, nematode populations and grain yield were subjected to analysis of variance, correlation, and cost-benefit analysis with means separated using Duncan Multiple Range Test. Results obtained revealed the presence of economically important plant parasitic tematodes in the two locations, Meloidogyne juveniles, Pratylenchus, Rotylenchulus reniformis and Helicotylenchus species being the host common. Application of carbofuran significantly reduced number of days to 50% flowering by 2-5 days. The relationship between treatment and nematode population was inversely proportional such that the lower the nematode population density the higher the grain yield and vice versa. Nematode population densities were significantly reduced at the lowest 2.4 kg a.i/ha rate of arbofuran with further significant reduction at 3.0kg a.i/ha. The least nematode infested variety was the IT90K-277-2 which recorded te lowest number of days to 50% flowering, highest number of seeds/pods and consequently yielded more grains than Ife-Brown and Oloyin varieties. Cost- benefit analysis indicated higher monetary returns of N 3.851.00kN 21,512.50k difference in profit tributable to carbofuran treatments compared to the control at all levels of application.