Keywords
population
Temperature
Helicotylenchus spp
Meloidogyne spp
How to Cite
Abstract
Nematode population distribution study was conducted to determine the different nematodes genera associated with the soil and roots of Jatropha and Teak plantations at University of Ilorin for a period of 18months. Total of 8 composite soil samples were collected from fields of Jatropha and Teak Plantations. Random sampling from each grid section and a random point was selected from teak and Jatropha plantation, and a soil sample was collected using soil auger. Samples were collected at a depth of 0-20 cm (top soil) and 20-40 cm (subsoil) to form a composite sample, (4 from Jatropha and 4 from Teak plantations. Samples were labelled, stored in polythene bags and transported to the laboratory for analysis. Results revealed Meloidogyne incognita, Helicotylenchus spp., Tylenchusspp., Pratylenchus spp., Criconemella spp. and Hoplolaimus spp. were encountered. The percentage predominance of Meloidogyne spp. was 45.73 % in the surveyed fields, followed by Helicotylenchus spp., (34.32%), the least was Criconema spp. with percentage predominance of 2.5%. The highest population of Helicotylenchus spp., Meloidogyne spp., and Pratylenchus per 10g of root in the field were recorded. The study indicates that Meloidogyne spp., and Helicotylenchus spp., were widely spread in all examined crops and locations of the plantations.
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