Effect of Plant-Parasitic Nematodes Associated with Tea in Nigeria

نویسنده

  • Samuel B. Orisajo
چکیده

Several species of plant parasitic nematodes have been encountered in soils of different tea-growing areas of the world. Roots and soil were sampled for the presence of plant-parasitic nematodes from tea plantations in Kusuku, the only major tea growing location in Nigeria. Six genera of plant-parasitic nematodes were recovered from the rhizosphere soil. Meloidogyne spp. Pratylenchus coffeae and Helicotylenchus coffeae were predominant with prominence values of 380, 212 and 88 respectively and occurred in 84, 63 and 58% from all soil samples of 250 cm soil respectively. This was followed in descending order by Rotylenchulus 3 reniformis, Radopholus spp. and Xiphenema spp. with frequency of occurrence 43, 39 and 29 respectively. Meloidogyne spp. was the only nematode species recovered from the sampled tea roots with 21% frequency of occurrence. Root-knot nematodes, Meloidogyne incognita, reduced the leaf area of selected tea clones seedlings significantly (P<0.05) compared to the control 4 weeks after inoculation. The nematode reproduced successfully on all the tea clones but China clones exhibited some level of tolerance to the nematode. There is the need of concert effort for controlling this nematode in tea, most especially with the recent move in Nigeria to cultivate tea in the lowland.

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تاریخ انتشار 2013