| 1 | Powdery mildew, for example, evolved in North America. | |
| 2 | Resistance to mildew, powdery mildew, virus disease disease. | |
| 3 | The vines are hardy and vigorous but susceptible to powdery mildew. | |
| 4 | The powdery mildew fungus is one of a number of major grape diseases | |
| 5 | St. Croix has vigorous growth and good resistance to powdery mildew and black rot. |
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