Some Effects of Pallidosis Disease on Strawberry Growth Under Greenhouse Conditions. R. H. Converse, Plant Pathologist, U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Unit, 3420 N. W. Orchard Ave., Corvallis, OR 97330-5098, and Department of Botany and Plant Pathology, Oregon State University. E. Volk, Research Assistant, Department of Botany and Plant Pathology, Oregon State University, Corvallis 97331. Plant Dis. 74:814-816. Accepted for publication 27 March 1990. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1990. DOI: 10.1094/PD-74-0814.

Various vegetative measurements were made in the greenhouse on potted plants of Fragaria virginiana cv. UC-10 and F. × ananassa cv. Northwest, uninoculated and inoculated with a severe strain of strawberry pallidosis agent (PA). Two months after inoculation with PA, dry weights of tops and roots of UC-10 plants (an indicator showing foliar chlorosis, distortion, and dwarfing when inoculated with PA) were half those of control plants. Seven months after PA inoculation, Northwest plants, though free of visible foliar symptoms, had root and runner plant systems that were reduced in number and weight by 15–20% in comparison with controls (P = 0.01–0.10). Foliar measurements of PA-inoculated Northwest plants did not differ significantly from uninoculated controls.