Beet curly top virulence increased
California Agriculture 31(6):12-13.
Published June 01, 1977
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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.