Author: Natalie Hoidal, Extension Educator, Local Foods and Vegetable Production At this point in the season, at least for diversified vegetable farms, the busiest part of the season is behind us. There’s still a lot of work to be done, but I encourage you all to take some time to make a plan for fall Brassica management, and in particular disease prevention. This season has been generally dry with fewer disease problems than normal, but we’re starting to see pressure from black rot (Xanthomonas campestris pv. campestris) and Alternaria leaf spot (Alternaria spp.) What can you do at this point in the season to prevent problems? Late summer Brassicas are often a source of inoculum for fall Brassicas. Photo: NH What can you spray? I reviewed twelve recent trials assessing the impact of various fungicides on black rot and Alternaria leaf spot in Brassicas, and compiled the results of each product into a table for comparison (see below). The data is complicated. A few of the co...