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Disease Note

Tomato Spotted Wilt Virus in Stephanotis in an Oregon Greenhouse. J. L. Green, Department of Horticulture, Oregon State University, Corvallis 97331. T. C. Allen, and S. Fischer. Department of Botany and Plant Pathology, Oregon State University, Corvallis 97331. Plant Dis. 72:912. Accepted for publication 4 August 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0912E.

Plants of Stephanotis floribunda Brongn. in a commercial greenhouse planting established 20 yr ago in Oregon began showing disease symptoms in 1987, i.e., wilting and dieback of terminal growth, leaf spots, leaf mottling and chlorosis, and necrotic lesions on flowers. Fungal and bacterial pathogens were not detected. However, bioassay on Chenopodium quinoa Willd., Gomphrena globosa L., cucumber, and tomato; electron microscopy of extracts and sections; and doubleantibody sandwich enzyme-linked immunosorbent assay (antiserum provided by D. Gonsalves, New York State Agricultural Experiment Station, Geneva) confirmed the presence of tomato spotted wilt virus (TSWV) in all symptomatic S. floribunda samples. TSWVappears to be spreading rapidly in greenhouse ornamentals (1,2) but has not previously been noted on S.floribunda, a woody perennial shrub of the Asclepiadaceae family.

References: (1) J. R. Baker and R. K. Jones. N.C. Flower Growers Bull. 33(2):6, 1988. (2) J. A. Matteoni et al. Plant Dis. 72:801, 1988.