Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu
Basil downy mildew has been confirmed near Vineland, NJ. Basil is at risk. Commercial growers can use ProPhyt or K-Phite — both are phosphorus acid fungicides with the same mode of action. Very few products are labeled currently for this use. Be sure to check fungicide labels for instructions and rates.
For more information and pictures check the following link from Cornell University. http://vegetablemdonline.ppath.cornell.edu/NewsArticles/BasilDowny.html