Investigation of Vectors of Grapevine Red Blotch Associated Viruses in California and Oregon & Plans for Washington State, presented by Doug Walsh of WSU, Frank Zalom & Mysore Sudarshana of UC Davis, and Vaughn Walton of OSU.

Excerpt: Is red blotch disease spreading? There was initial controversy as to whether or not what we now call GRBaV disease was associated with a virus and that spread occured was not universally accepted, however, observed patterns of incidence that would suggest spread was occurring; year-to-year increase in
new GRBaV infections was documented; and all known geminiviruses are insect transmitted.”

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