Beet curly top virulence increased
AuthorsAndrew C. Magyarosy
James E. Duffus
Authors AffiliationsAndrew C. Magyarosy is a plant pathologist, Department of Cell Physiology, University of California, Berkeley; James E. Duffus is a plant pathologist, USDA-ARS, U.S. Agricultural Research Station, Salinas, California.
Hilgardia 31(6):12-13. DOI:10.3733/ca.v031n06p12. June 1977.
Recent curly top isolates from San Joaquin Valley sugar beet fields and the foothills are more virulent than those collected in the 1950s and 1960s. The beet leafhopper (showm below, 48 times life size) carries the disease between crops and weed plants.
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