Airborne Vegetable Diseases of Concern in NC: Cucurbit Downy Mildew & Tomato / Potato Late Blight

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With typically cool and rainy periods of weather throughout the growing season, all High Country growers should scout for and take steps to prevent diseases on all crops. While many plant diseases originate in soils  and can be managed by preventive strategies such as crop rotation, many Downy Mildews travel here from warmer climates (generally, but not always points south of us) on weather systems, Cucurbit and Grape Downy Mildews, and Tomato/Potato Late Blight outbreaks are frequently observed observed in Georgia, South Carolina, or even Maryland  before reaching western NC. With airborne plant pathogens ‘on the march’ sometimes earlier than usual, it makes sense to track these diseases as they move across the southeast in a given growing season, especially when conditions on the ground favor crop disease development here. See these archived (i.e. – NOT CURRENT)   updates for examples of how NCSU’s Plant Pathology Extension Specialists track the movement of these diseases:

https://plantpathology.ces.ncsu.edu/2016/06/cucumber-downy-mildew-reported-in-north-carolina/

https://plantpathology.ces.ncsu.edu/2016/05/scout-potatoes-for-late-blight-due-to-recent-reports/

When growing susceptible crops such as Bunch Grapes (Winegrapes, etc.), Tomatoes, Winter Squash, etc., check the Plant Pathology website throughout the growing season, or call your Extension Agent. For scouting and spray recommendations for particular farm and crops in Ashe and Watauga Counties, whether conventional or organic, contact Agriculture Agent Richard Boylan at rjboylan@ncsu.edu or by calling Extension at 828-264-3061.