Spray trees to drip point with the spray directed at the moss infested limbs. Within a few months the moss will have a dry, gray unthrifty appearance. It be several months after the application, before the moss will begin to fall from the tree. The hold fasts will have to decay sufficiently to release the moss from the bark. Strong windstorms can decrease the time required for removal of the moss following its death.
Copper is a heavy metal and possibly acts as a poison that blocks the normal biochemical functions.
Copper can cause foliage burn to some plants and should be used with caution around plants not listed on the label. Peach, plum, apricot and nectarine in leaf are especially susceptible to injury from spray drift. Apples and pears are not affected by the copper fungicides. Kocide and the other copper hydroxide fungicides are frequently recommended for the control of fire blight on pear and apple trees. The fungicides are approved on a local needs registration in the southeastern United States for the control of certain pecan diseases.