First Report of Sweet Cherry Viruses in China. Y. Y. Zhou, Shaanxi Fruit Crops Research Center, No. 20 Dong Yi Road, Xi'an, Shaanxi 710065, China . X.F. Ruan, and C.L. Wu, Shaanxi Fruit Crops Research Center, No. 20 Dong Yi Road, Xi'an, Shaanxi 710065, China ; Q. Z. Zhang, Fruit Tree and Forestry Station of Weiyang District, Xi'an, Shaanxi, China. Plant Dis. 80:1429. Accepted for publication 8 October 1996. Copyright 1996 The American Phytopathological Society. DOI: 10.1094/PD-80-1429D.
Plantings of sweet cherry (Prunus avium (L.) L.) trees have become increasingly widespread for commercial production in China in recent years. After orchard establishment, many sweet cherry trees in Xi'an, China, display shot hole, enation, small reddish and/or yellowed leaves, limb dieback, and tree decline symptoms suggestive,of viral infections. Nearly 90% of the sweet cherry trees observed during the spring of 1996 exhibited one or several of these symptoms. Leaf samples were tested by enzyme-linked immunosorbent assay (ELISA) for prune dwarf virus (PDV), Prunus necrotic ringspot virus (PNRSV), apple mosaic virus (ApMV), and apple chlorotic leafspot virus (ACLSV) with Bioreba virus detection kits (Bioreba, South Bend, IN). All four viruses were detected in trees in these orchards. Among 105 trees assayed, two were positive for a single virus infection by PDV, seven were positive for PNRSV, three were positive for ApMV, and seven were positive for ACLSV. In addition, 34 trees contained both PNRSV and ApMV, and one was infected by both PNRSV and ACLSV. Five were infected by PDV, PNRSV, and ApMV; two by PNRSV, ApMV, and ACLSV. To our knowledge, this is the first report of these viruses in sweet cherry in China.