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Tomato Spotted Wilt Virus Survey Among Greenhouse Ornamentals in Pennsylvania. M. K. Hausbeck, Department of Plant Pathology, The Pennsylvania State University, University Park 16802. R. A. Welliver, M. A. Derr, and F. E. Gildow. The Pennsylvania Department of Agriculture Bureau of Plant Industry, Harrisburg, 17110; and Department of Plant Pathology, The Pennsylvania State University, University Park 16802. Plant Dis. 76:795-800. Accepted for publication 4 February 1992. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/PD-76-0795.

Symptoms associated with infection by the tomato spotted wilt virus (TSWV) were documented among bedding, potted, perennial, and foliage plants growing in commercial greenhouses in Pennsylvania. Previously unreported hosts were identified, including four bedding, seven potted, 16 perennial, and seven foliage plants. Of 316 bedding plants infected, 95% were infected with the impatiens strain of TSWV (TSWV-I), and impatiens (Impatiens wallerana) and begonias (Begonia spp.) were most frequently infected. Of the 266 potted plants infected, 93% were infected with TSWV-I, and cineraria (Senecio hybridus), cyclamen (Cyclamen persicum), and New Guinea impatiens (Impatiens hybridus) were the most frequently infected. Of the 85 perennial plants infected, 96% were infected with TSWV-I, and buttercup (Ranunculus spp.) and bee balm (Monarda didyma) were most frequently infected. The 38 foliage plants all were infected with TSWV-I.