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How to Avoid Potato Disease

The secret to healthy potatoes is in the selection.
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To avoid potato diseases, buy certified seed potatoes. In home gardens, potato scab can be caused by recent manure application; crop rotation is the best way to avoid it. Most other potato diseases, including late blight, which caused Ireland’s Great Famine, are encouraged by excessive water during the growing season, so try to plant your potatoes where soil drainage is not a problem.