Thanks for your insights guys. After reading up on shot hole disease I think that's what it is. But I don't like the idea of sitting around for a few months and only taking action in the fall. A few things: 1- Is there anything I can do now to kill the disease? 2- If not, is there anything I can do now to prevent the further spread of the disease throughout my tree? 3- What can I do to prevent the spread of the disease to my neighbouring fruit trees/plants (i.e. asian pear, european pear, other chum tree, raspberries, strawberries, grapes)? 4- Should I remove and burn all damaged foliage? Prune the tree? Thanks again Jon Here is a link that might be useful: Cherry Plum Tree Foliage Problem

The Fairy is resistant to blackspot but susceptible to cercospora spot disease. In mild weather with rain, reddish spots with smooth margins develop on leaves. These take weeks or months to kill the leaf, so obvious damage may not be apparent until late in the season as large dead areas, yellowing, and leaf drop. I have this on many of my blackspot-resistant varieties. Plants can usually tolerate it.

Your link to photos only produces an error message for me. Why don't you post the photo directly here? Use the "Image file to upload" button that is contained in every "Post a Follow-Up"

Jan, I understand about the swift transition from 'too cold' to 'too hot' as it commonly happens here as well. I often skip most cool-season crops completely because about the time they are almost ready to produce something, our high temps zoom up into the 90s and I get zero harvest from them. This year, I was feeling cocky because in last year's cool/wet spring/early summer, all my cool season crops produced the best crops they ever have, so I planted tons of cool-season crops this year. I know that by doing that, I probably jinxed my own garden. So, this week we've been as cold as 39 degrees here, and as hot as 86 degrees, and I've been watching the broccoli and Sugar Snap Peas very carefully. So far, all is well, but at a garden a couple of miles from us, their broccoli is bolting and flowering and that is making me nervous. I cannot think of anything in cow manure that would hurt your potato plants, especially since you are so experienced at using manure properly. I am assuming your cows don't eat any forage crops that have been sprayed with a clopyralid or aminopyralid product. Jleroi, You're welcome. I'm the queen of links, with at least one link in my 'memory bank' for every occasion. As hard as it is to find something reliable online that you can trust, I try to remember and share the ones that apply to a given situation. Dawn Here is a link that might be useful: MEN Article: Herbicide Contamination in Manure, Compost