In August of 2011, potato (Solanum tuberosum) tubers grown in the lower Columbia Basin of southern Washington State and northern Oregon were observed with internal discolorations suggestive of zebra chip disease (ZC). Symptoms included brown spots, streaks, and stripes in and near the vascular tissue, typical of ZC (1). Symptoms...
Beet leafhoppers were collected weekly on
yellow sticky traps placed at 36 locations in Morrow and
Umatilla Counties in northeastern Oregon in April through
November 2007, 2008, and 2009. Insects were counted,
collected, and a subset of the insects was tested for the
presence of the beet leafhopper-transmitted virescence
agent...