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Nnadi, O.F., Ononuju, C.C., Ikwunagu, E.A. and Orikara, C.C. 2019. The Effect of Air Dried Leaf Powder and Burnt Leaf Ash of Different Plants on Root-knot Nematode (Meloidogyne spp.) on Okra (Abelmoschus esculentus L. Moench). Journal of Experimental Agriculture International. 41, 1 (Oct. 2019), 1-8. DOI:https://doi.org/10.9734/jeai/2019/v41i130389.