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Root-knot Nematode Suppression in Tomato with Selected Organic Amendments in Comparison to Carbofuran
O. K. ADEKUNLE (1), O. K. Adekunle (2). (1) Obafemi Awolowo University, Ile-Ife., Ile-Ife, Nigeria; (2) Department of Crop Production and Protection , Obafemi Awolowo University, Ile-Ife, Nigeria

A two–year field study was conducted in 2011 and 2012 in the tropical rainforest zone of Nigeria to investigate suppression of population densities of <i>Meloidogyne incognita </i>with compost, poultry manure and Neem leaves in comparison to carbofuran. The experimental field was naturally infested with <i>M. incognita</i> and this had resulted in wilting of tomato seedlings, floral abortion and poor yield in past cropping seasons. The highest reduction in <i>M. incognita </i>population density was recorded in plots amended with compost at 10 t / ha which was not significantly lower than <i>M. incognita </i>population densities in plots amended with carbofuran at 3.0 kg / ha and 1.5 kg a.i / ha, poultry manure at 10 t / ha and 5 t / ha and Neem leaves at 10 t / ha. The reduction in nematode population in amended plots were significantly lower than that in control plots. Cumulative tomato fruit yield was highest in plots amended with carbofuran at 3.0 kg a.i/ha, but this was not significantly higher than yield from plots amended with compost, poultry manure and neem leaves at 10 t / ha. The fruit yield in amended plots was significantly higher than in control plots. Results were consistent in both years of the study indicating that the organic amendments had potentials to suppress root-knot nematode population associated with tomato thereby ensuring sustainable tomato production.

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