Answer: The answer to your question will depend on several factors including what specific variety you are growing, which pests and diseases are most prevalent in your area, and whether your tree has had problems in the recent past, or not. I would suggest you work with your local Cornell cooperative extension to develop a spray program for your peach trees based on the above information. They will have the most up to date recommendations on what product(s) to use and how/when is the best time to apply for maximum results. For example, peach leaf curl cannot be controlled once the symptoms appear, it has to be treated preventively during the late fall or early spring.
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