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First Report of Lettuce Mosaic Virus on Chickpea. N. A. Bosque-Perez, Department of Agronomy and Range Science, University of California, Davis 95616. I. W. Buddenhagen, Department of Agronomy and Range Science, University of California, Davis 95616. Plant Dis. 73:368. Accepted for publication 6 January 1989. Copyright 1989 The American Phytopathological Society. DOI: 10.1094/PD-73-0368D.

Chickpeas (Cicer arietinum L.) showing yellowing and tip wilting were found in the field at Davis, California, during autumn 1987. Negatively stained electron microscopic preparations of leaf tissue revealed long flexuous rods (750 nm). Positive mechanical transmission was achieved to Chenopodium quinoa Willd. (chlorotic local lesions with systemic infection), lettuce (Lactuca sativa L. 'Cobham Green') (systemic mosaic and veinclearing), and several chickpea cultivars and one wild species (C. yamashitae Kitam.). Symptoms in chickpeas consisted of mottling of terminal leaves in 10-15 days, followed by tip wilting, general yellowing, stem darkening (phloem), and death after 5-6 wk. Lettuce mosaic virus (LMV) was transmitted from chickpea to chickpea in a nonpersistent manner by the green peach aphid (Myzus persicae (Sulzer» after acquisition for 15 min. Numerous attempts to transmit the virus with the pea aphid (Acyrthosiphon pisum (Harris» and the cowpea aphid (Aphis craccivora Koch) were unsuccessful. Identity of the virus was confirmed serologically in immunodiffusion tests by us and by R. Provvidenti and J. E. Duffus. This is the first report of LMV infecting chickpeas naturally, but the virus has been reported as occurring naturally in one other leguminous host, pea (1).

Reference: (I) R. Provvidenti. Plant Dis. Rep. 57:688, 1973.