That has to be peach leaf curl ... but it looks slightly different than what our trees get here in nor cal / north bay ... there is more red pigmentation in the examples that I have experienced, but the same texture. I'm calling it leaf curl until someone smarter and more experienced (and there are alot of those folks on this site btw) tells me I'm wrong. Having said that ... too late this year to really do anything. I have heard some folks say to pick off the bad leaves and remove them far away or burn them ... other folks that say don't bother. It is important though to do a good fall clean up this year and get ALL of the leaves and other debris out of the orchard ... it is caused by a fungus that overwinters in buds, crevices in the bark, and those fallen leaves are full of spores. Solution ... welcome to the world of spraying, it's a joy. You can hire somebody, or you need to buy a one gallon pump sprayer with a wand and spray with a lime-sulfur mixture or a fixed copper spray , or a combination of that. 2 sprays at minimum, a late fall / early winter spray in like December and then a late winter spray like February. I spray 4 or 5 times, alternating lime-sulfur and then copper with very good results, but still a little curl here and there ... rain makes it far worse, curl thrives in the damp conditions ... and the rain rinses off alot of the fungicide ... so re-sprays are needed in between stretches of rain. There are leaf curl resistant varieties ... Indian Free, Q-18 (now called Salish Summer), Muir ... and a very popular one called Frost. One Green World is an online nursery that has these and other resistant varieties. Even resistant trees actually need to be sprayed too for the first couple of years. Welcome to the peach growing crowd, it is a very common problem. Suggest you search "Peach Leaf Curl" and get yourself more educated on the topic.

Joe Blow pretty much covered it. after just one season, your trees won't be threatened, but if you do nothing it will eventually kill the trees.

Jason makes a good point ... it will dramatically reduce or eliminate production and eventually kill the tree. If you do nothing, and just hope it doesn't get it next spring, it will get it. BTW, what kind of peach is it ?

It is definitely peach leaf curl caused by the fungus Taphrina deformans. I spray my peaches late winter with a fungicide containing chlorothalonil and that seems to do the trick. Perhaps in your area one application may not be enough.

One year when I sprayed and my fungicide was too old (8 years) I got poor results. Happily the infected leaves started dropping off mid-summer. Made a mess on my lawn but the tree was fine. You definitely need to spray with a preventative fungicide while the tree is still dormant each year. Once the leaf buds crack open in spring, spraying will not help.

Joe Blow

Please could you tell how much of lime sulphur or copper you mix per one litre of water or gallon. Thank you