What do you suggest to eliminate Peach Leaf Curl?
I observed Peach Leaf Curl on Nectar, White Lady, Peregrin, and Indian Free peach trees. I have had this disease for the last several years. Last December, I sprayed these trees with a solution of Liqui-Cop at a rate of 6 tsp/gal of water. I needed to wait this late to get the 90% defoliation required per the label instructions. I repeated this spray on March 27th. What do you suggest to eliminate this problem?
Katherine Garland, Horticulturist
Peach leaf curl is readily controlled. There are no known sanitation or cultural practices that have been proven to be effective, and there are little to no peach or nectarine cultivars that are immune to the disease. Frost, Indian free, Muir, and Q-1-8 are some currently discovered resistant varieties. However, effective control can be achieved with one or at most two fungicide treatments. Spray either in the fall just before defoliation normally occurs or in the spring just before the buds begin to swell or at both times if the problem is severe. Some fungicides which are effective include: chlorothalonil, Bordeaux mixture, lime sulfur, and fixed coppers.
You should check your local town ordinance for any pesticide restrictions before application.