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Iris yellow spot virus: An Emerging Threat to Onion Bulb and Seed Production

David H. Gent , U.S. Department of Agriculture-Agricultural Research Service and Oregon State University, Corvallis ; Lindsey J. du Toit , Washington State University, Northwestern Washington Research and Extension Center, Mount Vernon ; Scott F. Fichtner , Western Farm Service, Clovis, CA ; S. Krishna Mohan , University of Idaho, Parma Research and Extension Center, Parma ; Hanu R. Pappu , Washington State University, Pullman ; and Howard F. Schwartz , Colorado State University, Fort Collins, USA