Ontogenic resistance to powdery mildew in grape berries.

@article{Gadoury2003OntogenicRT,
  title={Ontogenic resistance to powdery mildew in grape berries.},
  author={David Gadoury and Robert C. Seem and Andrea Ficke and Wayne F. Wilcox},
  journal={Phytopathology},
  year={2003},
  volume={93 5},
  pages={547-55}
}
ABSTRACT Berries of Vitis vinifera are reported to be susceptible to infection by Uncinula necator until soluble solids levels (brix) reach 8%, and established colonies are reported to sporulate until brix reach 15%. However, our analysis of disease progress on fruit of selected V. vinifera cultivars indicated that severity became asymptotic several weeks earlier in fruit development. When mildew-free fruit clusters of V. vinifera 'Chardonnay', 'Riesling', 'Gewürztraminer', and 'Pinot Noir… CONTINUE READING
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