Jim from Menlow Park, Pa writes
On flowers such as roses, apply as a thorough coverage spray using 2 teaspoons of LIQUI-COP per gallon of water. Begin application at first sign of disease and repeat at 7-14 day intervals as needed. Use shorter interval during periods of frequent rains or when severe disease conditions persist. Do not apply more than 460 tsp. of LIQUI-COP (0.46 lbs. metallic copper) per 1,000 sq. ft. per year.
Answer last updated on: 04/08/2019