identifying disease on apple/pear trees: please help
I inherited a small orchard up in Twin Lakes, WI. We have a total of approximately 30-35 trees (predominanetly apple and pear). I sprayed with dormant oil this spring followed by a fruit tree spray last month.
However, in recent weeks, I've noticed brown spots on the leaves of my pear trees. The apple trees, on the other hand, have leaves that are curling up and brown. They almost look burnt.
I'm at a loss to how to proceed. Is there any particular insectiside that I use? I am nervous that if I don't attempt to remedy this quickly, I will have a disaster on my hands. PLEASE HELP AND HELP SOON. Thank you in advance.