Phyton 27 is a systemic, broad spectrum fungicide-bactericide. I recommend a drench of 1 teaspoon per gallon to saturate the roots in the spring when the leaves begin to emerge and again in the fall before fall color begins. This maintenance application provides a barrier against infection. Phyton 27 is also effective in the treatment of active infections with a foliar spray at a rate of 1/2 teas. per gallon, three times at 10 day intervals. This preventative maintenance program along with our good cultural practices has virtually eliminated disease in the nursery.