Disease Note.

Barley Stripe Mosaic Virus in Mexico. M. R. Zamora, INIFAP, Apdo. Postal 10, Chapingo, 56230 Mexico. P. A. Burnett, H. E. Vivar, R. Rodriguez, and M. Navarro. CIMMYT, Lisboa 27, Apdo. Postal 6-641, 06600 Mexico, D.F.; Colegio de Postgraduados, Montecillos, Mexico; and INIFAP, Chapingo, Mexico. Plant Dis. 72:546. Accepted for publication 8 February 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0546C.

Since 1983, widespread symptoms (6-30% infected plants) of barley stripe mosaic virus (BSMV) have been observed in many commercial crops of barley (Hordeum vulgare L). in the high valleys of Mexico, near Mexico City and in the Bajio area north of Mexico City. Mechanical sap inoculations from symptomatic plants (white mottling and streaking and brownish necrotic stripes) were successfully made to a range of differentials, including H. vulgare, Triticum aestivum L., Avena sativa L., Zea mays L., Chenopodium amarantieolor Coste & Reyn., and C. quinoa Willd. The presence of BSMV was confirmed serologically with antiserum supplied by R. I. Hamilton of Canada and by observation of the particles (130 X 20 nm) with a transmission electron microscope. In 1972, R. I. Hamilton (personal communication) identified BS MV from barley breeding lines in Mexico. This is the first report of this virus in commercial barley crops in Mexico, however.