What could be cause the leaves on my peach tree to curl up near a "scrunchy" appearance? Back in 1985 or so, my grandfather planted a peach tree contained...

Back in 1985 or so, my grandfather planted a peach tree contained by our backyard. In the past few season, I noticed that the amount of fruit significantly diminished once the leaves on the tree took on a scrunchy, curled up close to appearance. I think here were some black aphids on the leaves... could that be the sole mete out of the problem. What's the best spray to use? As for natural pest control, do ants work better than ladybugs? I notice that the ants and yellow jacket are at it every year on ALL our trees, eating the aphids. Somehow though, the aphids capture SOME damage done. Is near a way to stamp out these aphids for good, past they have a unpredictability to hurt the trees?
Check outmy broken oak!?
Answers:    Peach Leaf Curl
Peach leaf curl is cause by the fungus, Taphrina deformans
Leaf curl is not difficult to control.
Check out this link they own a photo of the curl. It might be what you have.
http://ohioline.osu.edu/hyg-fact/3000/30...

Put this into rummage bar:
leaves on peach tree curling up
You will verbs up several URLS

Lady bugs are the best for aphids but I think your tree have the fungus causing smaller number fruit. I don't know about the ants and the ashen jackets look for nectar.