Ken from Crystal River, Fl writes
Southern Ag Liquid Copper will kill ball moss on live oak trees. You would use 2 oz. per gallon of water. Apply in Spring when the ball moss is actively growing, using 1.5 gallons of spray per foot of tree height. Make sure to wet ball moss tufts thoroughly. A second application may be required after 12 months. Please review the product label for complete application instructions and precautions.
Answer last updated on: 01/15/2015