Everts et al.
Foliar fungicides are an important component of disease management systems available to growers.
White rust susceptible 'Seven R', and moderately resistant 'Fall Green', 'Vancouver' or 'Coho' cultivars were examined. Some treatments, were phytotoxic, especially copper hydroxide applied full season. Host resistance was as effective as fungicide application in two environments where white rust was severe. Nontreated Vancouver and Fall Green produced a yield of A Grade fresh market spinach similar to Seven R treated with copper hydroxide and fosetyl-Al. In one environment where white rust onset was late, resistance was more effective than fungicide treatment in preventing a reduction in grade.