There are a couple of organic solutions. The first thing you need to do is clean up all the old fruit and throw it away. This fall when the leaves drop spray with copper. In the winter spray with dormant oil spray. In the spring spray with copper a couple of times before the tree comes out of dormancy. For the moment spray with sulphur. In the spring and summer you should spray with sulphur every week. For the insects most organic farmers spray with surround. If you want to grow organic fruit read up on neem oil, serenade, and surround. Consider bagging fruit ( there are YouTube videos) . I'm not an organic fruit grower I am a member of forums organic fruit growers are part of. Good luck hope that gives you a place to get started.