Disease Note

Two Newly Recognized Hosts of Cucumber Mosaic Virus: Eustoma grandiflorum and Peristrophe angustifolia. R. Provvidenti, New York State Agricultural Experiment Station, Cornell University, Geneva 14456. Plant Dis. 69:542. Accepted for publication 7 March 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-542g.

Cucumber mosaic virus (CMV) was recovered from naturally infected plants of two ornamentals, Texas bluebell (Eustoma grandiflorum Griseb.) and Peristrophe angustifolia Nees., grown in a florist’s garden. Texas bluebell showed severe foliar mosaic, distortion, and stunting as well as flower color break and malformation. Symptoms on leaves of P. angustifolia consisted of a mild light-green mottle and spots; flower color was not affected. Virus isolates from the two hosts were identified as CMV by electron microscopy, serology, and diagnostic species. Experimentally, plants of these two species inoculated with virus isolates from naturally infected plants and other known CMV isolates reacted with symptoms similar to those noted under natural conditions. This appears to be the first report of CMV infection in Eustoma and Peristrophe species.