Black rot is another major disease problem. No fungicides are currently labeled for control of Sclerotinia white mold or Fusarium yellows. Although pest problems are similar for both types of crops, more formulated product of insecticide is used on fresh market crucifers than on the processing crop. Nevertheless, insecticide on the fresh market crop constitutes a smaller percentage of total pesticide used than in the process market. The explanation for this seeming discrepancy is the fact that fungicides are extensively used on fresh market crucifers, which thus affects all percentages of pesticide use.
Weed control is achieved in the same way for fresh market cabbage as for processing cabbage.
An application of two herbicides is typically used near planting time, and subsequent weed control is achieved through hand weeding. Herbicide load in crucifers is a relatively small proportion of total pesticide use. A list of current chemical pesticides that may face problems in the re-registration process is provided in table 27.3 . This table also addresses the potential effect of any losses on crucifer growers. Research has shown that chlorothalonil provides excellent control of fungal diseases with very few applications.