Reactions of Cowpea Cultivars to Bean Yellow Mosaic Virus Isolate under Greenhouse Conditions In Nigeria

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Date
1992
Authors
Abo, M. E.
Akueshi, C. O.
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Abstract
Cowpea (Vigna unguiculata L. Walp) is an important grain legume of the inland humid tropics and serni-arid tropics (Rachie and Roberts, 1974). However, cowpea yield is greatly reduced by virus diseases especially Bean Yellow Mosaic Virus (BYMV) disease which is widely distributed wherever this crop is grown (Shoyinka, 1973; Galvez, 1980; Thottapilly and Rossel, 1985). The virus is readily transmitted by sap inoculation and in a non-persistent manner "by many species of aphids (8os, 1970; Thottapilly et aI, 1972). Several Cultivars of cowpea are susceptible to this disease, which causes indefinite yellow banding along the major veins of young leaves, and yellow mosaic on older leaves. Yield losses of 59-IOOOA, have been previously recorded for BYMV (Shoyinka, 1973; Frowd and Bernier, 1977).
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East African Agricultural And Forestry Journal, 58 (1 & 2), p. 49-53
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