Okechukwu, R.U.Ekpo, E.J.A.Florini, D.A.2012-04-102012-04-102000Tropical Agricultural Research and Extension3(2)pp.98-101https://dl.nsf.gov.lk/handle/1/8029Yield depression in cowpea cultivars infected with Xanthomonas campestris pv. vignicola in Sudan savanna of NigeriaArticle