This soap offers great residual protection!
Leonard Disease Shield™ Copper Soap is your solution to disease control. Its active ingredient, copper, is a natural disease control process. Copper ions prevent disease pathogens from growing, continually protecting your crops. Once applied, Disease Shield™ begins releasing these ions. Water from rain or your hose activates residual soap and continues to protect your plants from disease. Mix at a rate of 5.2 ounces of soap per 1 gallon of water.