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Bulletin

Abstract

Cabbage yellows caused by Fusarium conglutinans is widely distributed in Iowa. It probably was introduced into the state just previous to 1910 on cabbage transplants shipped from the southern states. The organism causing cabbage yellows is the chief limiting factor in cabbage production in the Muscatine Island section and contiguous territory on the Iowa side of the Mississippi River. The yellows organism may live in the soil for long periods of time, at least 11 years, and still be destructive to a cabbage crop. Cabbage, cauliflower, Chinese cabbage, kohlrabi and brussels sprouts are known to be hosts of this organism.

Cabbage yellows is most destructive in the Cornelt states, where the temperature range is favorable for the causal agent during the growing season of the crop. Losses ranging from 50 to 95 percent of a crop are common on any of the commercial early or late varieties. Certain individual plants in the variety Copenhagen market have proved quite resistant.

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