Peach Tree Leaf Curl - Knowledgebase Question

Cincinnati, Oh
Question by daisymains
January 18, 2010
My peach tree gets leaf curl in the summer, and I was told that
it should not be treated
until dormant. What should I use to treat it
now, and is what I need
available at Home Depot?

Answer from NGA
January 18, 2010


Peach Leaf Curl can affect leaves, flowers, tender shoots and even fruit. Diseased leaves eventually fall off, but unaffected leaves will grow on normally. Once you see the problem it is too late to correct it for that season. Sanitary measures certainly can't hurt, so you may want to collect and discard fallen, affected leaves, and to prune twigs with the small, seldom noticed swellings caused by the infection. Infection occurs in spring when temperatures are around 68 degrees and surface moisture is present on the buds. Therefore the problem doesn't occur every year with the same severity. The lowest toxicity option for effective control is to apply a copper fungicide at the beginning of dormancy in the fall. Copper will cause the peach to defoliate so that is why we wait until the leaves begin to fall to apply it. Note that copper can stain masonry blue, so be careful in applying the spray if your tree is near a sidewalk, rock wall of your home, etc. Although you missed the fall application, you can spray now. Check the label of the brand of copper based fungicide you purchase for detailed application instructions. Best wishes with your peach tree.

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