Disease Note

Cotton Leaf Crumple Virus Transmitted from Naturally Infected Bean from Mexico. J. K. Brown, Department of Plant Pathology, University of Arizona, Tucson 85721. M. R. Nelson, Department of Plant Pathology, University of Arizona, Tucson 85721, and R. C. Lambe, Department of Plant Pathology, Physiology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg 24061. Plant Dis. 70:981. Accepted for publication 16 April 1986. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-981b.

Cotton leaf crumple virus (CLCV) was successfully transmitted by Bemisia tabaci Genn. from symptomatic, naturally infected bean (Phaseolus vulgaris L.) and cheeseweed (Malva parviflora L.) to the diagnostic indicator plant, Gossypium hirsutum L. Plants were collected near Obregon, Sonora, Mexico, where over 40% of the bean plants displayed leaf crumple symptoms and 100% of the plants were infested with whiteflies. This is the first report of CLCV in cultivated bean and native cheeseweed, although the virus was shown to infect both species under experimental conditions (1). The cultivation of two virus host crops and a common weed host in the same region could potentially encourage an increase in virus inoculum and thus more frequent and widespread CLC epidemics.