My lilac bushes have blight. My local extension office in Missouri suggested copper sulfate as per your article on "How to recognize, treat and avoid lilac bacterial blight". I found Copper Sulfate Smart Crystals but I can't find a mixing, dosing, treatment regimen for my bushes that I can understand. Any recommendations on how I can safely measure, mix and apply the copper sulfate to treat the blight and frequency of application? Thank you in advance.
St. Francois County Missouri