Our peach trees have been showing these signs of disease for about 3 years now. I am new to the property but I don't think there had been been much in the way of spraying or fertilizing. The property uses organic practices. We don't have a problem with deer, we have a livestock guardian dog. The peach trees are all in one row and all show the same signs of disease. They are in a low spot on the property and had some standing water around them in the winter. The twigs start turning black and have those stringy bits on the ends. When the leaves come out, it looks like they have peach leaf curl. Only one of the trees produced fruit last year (just a couple) and the fruits looked fine, although small. We applied a copper fungicide once this dormant season, but the twigs look pretty bad still (we had pruned off all the dead stuff last spring). Are the black and broken twigs part of the leaf curl disease or is it something else? We are doing a more comprehensive spraying program this year with the copper fungicide, lime sulfur, and a neem oil+fish emulsion+kelp combo in the spring, but we are doing it without knowing exactly what is wrong with the trees. Any suggestions?