
Clubroot is a common disease of cabbages, broccoli, cauliflower, Brussels sprouts, radishes, turnips, stocks, wallflowers and other plants belonging to the family Brassicaceae (Cruciferae). It is caused by Plasmodiophora brassicae, which was once considered a slime mold but is now put in the group Phytomyxea. It has as many as thirteen races. Gall...
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http://en.wikipedia.org/wiki/Clubroot

disease of plants of the mustard family (Cruciferae) caused by the fungus Plasmodiophora brassicae. Susceptible plants include broccoli, cabbage, ... [1 related articles]
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http://www.britannica.com/eb/a-z/c/100

a disease of cabbage and other cruciferous plants, characterized by enlarged, malformed roots, caused by a slime mold, Plasmodiophora brassicae.
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https://www.infoplease.com/dictionary/clubroot
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