Two look-alike imported biotypes of a parasitic wasp are being tested against the variegated grape leafhopper in the San Joaquin Valley.

The authors thank Teri Bates and Pat Henier for their assistance in data collection, William Settle for the photo of A. epos, John Sorenson for identifying leafhoppers, and Bill Peacock for the use of his vineyard. Funding for this research program was provided by the California Raisin Advisory Board, the California Table Grape Commission, and the Wine Growers of California.