Together, stalk and foliage form a broom shape, which has given rose rosette disease the nickname "witch's broom."
M.A. Hansen/Virginia Cooperative Extension .
published Monday, June 3rd, 2013
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Rosemary Wolff has been growing roses for more than 30 years, so she knew something was wrong when red, broom-like sprouts started popping up on her hybrid tea roses.