Mancozeb w/Zinc Concentrate controls Cercospora leaf spot, Downy mildewDowny mildewDowny mildew refers to any of several types of oomycete microbes that are obligate parasites of plants. Downy mildews exclusively belong to Peronosporaceae. In commercial agriculture, they are a particular problem for growers of crucifers, grapes and vegetables that grow on vines.https://en.wikipedia.org › wiki › Downy_mildewDowny mildew - Wikipedia, Anthracnose, Gummy stem blight and Scab. Mixture is 4-5 tsp per gallon of water, starting to use it when plants are in the 2 leaf stage. Repeat this at 7-10 days using enough water and direct spray to cover lower and upper leaf surfaces.