TY - BOOK AU - Ali Hussein Hamed Mohamed AU - Gamal Amin Mohammed Ghanem , AU - Hassan Ibrahim Ali Ahmed Elnaggar , AU - Omhasheim Mohammed Elbanna , TI - Studies on some viruses infecting onion (Allium cepa L.) plants in Egypt / PY - 2011/// CY - Cairo : PB - Ali Hussein Hamed Mohamed , KW - Onion yellow dwarf virus KW - Serological detection KW - Tobacco rattle virus N1 - Thesis (Ph.D.) - Cairo University - Faculty of Agriculture - Department of Plant Pathology and Physiology; Issued also as CD N2 - Two viruses used in this study, Onion yellow dwarf virus (OYDV) and Tobacco rattle virus (TRV), were isolated from naturally infected onion (Allium cepa L.) plant growing in the field of onion plants during the survey carried out in 2007-2008 and 2008-2009 in seven Egyptian Governorates. The results indicated that the mean percentages of OYDV-infection were 24.48 and 19.98% and TRV-infection were 1.04 and 0.42% respectively in first and second seasons all over the seven governorates UR - http://172.23.153.220/th.pdf ER -