Research has been carried out on clubroot resistant white cabbage received from Germany and the U.S.A. In the Netherlands, too, a number of plants of both origins were not affected. The European material proved more resistant than the American. In various respects these varieties do not come up to the requirements of growers in different parts of the world. The resistance will have to be bred into the established commercial varieties by repeated backcrosses. Resistance was found in some varieties of kale and Savoy cabbage, not in red cabbage, cauliflower, green sprouting broccoli and Brussels sprouts.