N.B, I., L.B, Y., S.A, A. and I.W., N. 2015. Efficacy of Aqueous Leaf Extracts of o Negro Coffee (Cassia Cassia occidentalis) occidentalis and Lemon Grass (Cymbopogon Cymbopogon citratus) citratus in the Management of f Nematode Pests of Okra (Abelmoschus Abelmoschus esculentus L. Moench). Journal of Science, Technology and Arts Research. 4, 3 (Sep. 2015), 67–70.