Grape Leafroll Disease Perrin Collins University of Georgia.

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Presentation transcript:

Grape Leafroll Disease Perrin Collins University of Georgia

Grape Leafroll Virus

Why is GLD important? Effects of GLD Detrimental to grape quality: -pH, sugars, berry weight Berry Maturity Reduced vine vigor and fruiting “Yield reductions directly attributable to GLD vary, but reductions in the neighborhood of 50% (or more if the disease is severe) are commonly reported on a worldwide basis.” –Dr. Naidu Rayapati

PCR Results Virus Samples Testing Positive / Total Samples GLRaV10/10 GLRaV20/10 GLRaV38/10 GLRaV40/10

Georgia Grape Quality Tests Average Cluster WeightBrixpH Infected Vines Healthy vines