Infection occurs during the spring from bud swell to bud opening. Spores of the fungus, which overwinter on bark and bud scales, wash onto the young leaf tissue in wet weather and initiate infections. Leaf curl is most severe when weather is wet and cool.
Peach leaf curl can be controlled by applying one spray (Ferbam, Bordeaux, or Lime sulfer) before bud swell or in the autumn after most of the leaves have fallen. Once the current year's leaves become infected, they cannot be treated effectively.
This article originally appeared in the June 5, 1991 issue, p. 98.
|Prepared by Paula Flynn, Department of Plant Pathology|
Iowa State University, Ames, Iowa.
This information subject to a usage policy.
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