Symptoms of Iris yellow spot virus on wild onion.
B. Hellier (1), H.R. Pappu (2), and F. Dugan (1) (1) USDA-ARS, Western Regional Plant Introduction Station; and (2) Department of Plant Pathology, Washington State University, Pullman, WA 99164. Email: hrp@wsu.edu
Iris yellow spot virus (IYSV) is beginning to cause economic losses in both onion seed and bulb crops in Washington State. The virus was confirmed in onion wild relatives being grown in Central Ferry Farm in WA State. Samples were collected in June 2005. Characteristic symptoms include diamond shaped lesions. From left to right: Lesion size increases with age of the infection and the age of the plant at which sampling was done. Individual lesions continue to expand, coalesce and may lead to extensive drying.
Picture your photograph as the APS Featured Image Click here to find out more
License to Copy. This notice hereby grants permission to APS users to copy the image featured for noncommercial, personal use. All components of APSnet are copyrighted and may not be reproduced or distributed except by express permission of APS. Copyright is not claimed for material provided by United States government employees as part of their work. APS copyright extends to images, text, graphics, photographs, illustrations, audio, video, computer software, and all other elements of the site.Instructions to Copy. For PC, position your mouse cursor on the featured image, click the right mouse button, and choose "Save Picture As..." or "Save this Image as..." whichever is the case. For Mac, click the only mouse button and follow the same steps. Users may want to set up a specific directory and file naming scheme for storing images; otherwise, they will be saved using your system defaults. Images may be used in any software application that supports JPEG file format or viewed in an Internet browser as local files.