Abstract
Field study was conducted between January and June 2011 to determine the plant-parasitic and non-parasitic nematodes associated with three indigenous leafy vegetables (Amaranthus viridis, Celosia argentea and Corchorus olitorius) commonly grown in inland valley by farm practical year students’ trainees at the Federal University of Agriculture, Abeokuta. The 1.76-ha land was laid out in randomised complete block design with four replicates. Six soil cores were taken per replicate and bulked. Two sub-samples weighing 250 g per replicate were assayed for nematodes using WhiteHead and Hemming Tray method. Results revealed the presence of five genera of plant-parasitic nematodes, namely Tylenchus, Pratylenchus, Helicotylenchus, Meloidogyne and Rotylenchulus. Populations of Tylenchus differed statistically (p = 0.05) from all others in C. olitorius. The non-parasitic nematodes varied significantly (p = 0.05) among the vegetable types. Galls incited by Meloidogyne spp. were more (p = 0.05) in C. argentea and C. olitorius than A. viridis.
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