Cucurbit Genetics Cooperative Report 22:55-56 (article 20) 1999 H.S. Ibn Oaf, E.A. Ahmed, A.E. El Jack and G.A. Daffalla Faculty of Agricultural Sciences, University of Gezira, P.O. Box 20, Wad Madani, Sudan Zucchini yellow mosaic virus causes a very serious disease of squash in Sudan, particularly in the central region. On many occasions it causes […]