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 Open Access
Published:
Apr 10, 2006
DOI:
10.4314/br.v3i1.28564

Article Details

Issue
Vol. 3 No. 1 (2005)
Section
Articles

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Main Article Content

Pests and diseases of African yam bean, <i>Sphenostylis stenocarpa</i> (Hoechst. Ex. A. Rich) harms


GI Ameh
Department of Applied Biology, Enugu State University of Science and Technology, Enugu, Enugu State, Nigeria
CEA Okezie
Department of Botany, University of Nigeria, Nsukka, Nigeria

Abstract

Several pests and diseases were identified on African yam bean, Sphenostylis stenocarpa. The pests attacked both the vegetative and reproductive stages of crops. The pests of the vegetative stage were identified as cutworms (Agrotis spp), aphids (aphis craccivora), grasshopper (Zonocerus variegates), Maruca testulalis, Cydia ptychora and leaf-rolling caterpillars (Sylepta derogate). Both the larvae and adults of these pests attacked the crops. Pests of the reproductive stage identified were: Cydia ptychora, Helithis armigera, Riptortus dentipes, Apion varium and Nezara viridula. The larvae and adults of these pests were also observed on the reproductive part. The disease identified on African yam beans included wilting, powdery mildew, root gall, rust and leaf mosaic. These diseases attacked the crop between seeding emergence and pod maturity.

Bio-Research Vol. 3(1) 2005: 14-20