Plant Diseases/Peach Leaf Curl
What are the ramifications of applying dormant spray after the buds have opened? Is the fruit compromised or the pollinators killed?
Since the Taphrina fungus can overwinter on bud scales, waiting until after the buds open can cause a reduction in the effectiveness of the fungicide. Leaf infection can occur as the buds are opening and leaves begin emerging if no protection is present at that time. The ideal time is just before opening. I am not aware of any adverse effect to the fruit or insects by the fungicide application after bud opening.