Hope you are doing well!
I thought you might want an organic solutions to the spots. The spots are a fungus, generally they show up in late spring but, with weather being off this year, we have noticed that a lot of fungal diseases are showing up a little later. Here are a few things you can try, I have used all of these and they work well when applied according to the directions: Fungus Pharm Organic All Natural Fungicide, Nature's Way Fungus Spray,.
I have also used this method many times with great success: Treatment:
Use 3 percent hydrogen peroxide, it will not harm plants or fruit trees if applied
undiluted. It will treat a wide range of fungal diseases including powdery
mildew, rot and wilt. Spray the infected fruit tree with undiluted 3 percent hydrogen peroxide. For horticultural grade hydrogen peroxide -- which is generally about 35 percent -- mix 2 1/2 tablespoons with 1 gallon of water. Transfer the homemade fungus treatment to a clean pump sprayer. Spray when Calm and no rain is forecast, spray the tops and undersides of the fruit trees' leaves thoroughly until the solution is dripping off the foliage. Repeat the treatment once a week. It is best to make the homemade fungus spray the day you use it.
As for not bearing fruit: Over-pruning trees tends to keep them vegetative and greatly delays their bearing fruit. Prune your trees only enough to train them to the desired form, whether they are open center or modified leader, then leave them alone. Some people prune them back hard thinking the vigorous shoots that result are good for the tree. This is far from the truth. Those shoots are not productive and can actually harbor more insects than normal shoots. So don't over-prune.
Another reason for a delay in bearing could be over-fertilization, particularly with high nitrogen fertilizers. These promote excess vegetative growth and delay bearing. Use only enough balanced fertilizer like 10-10-10 to produce about one foot of new growth on your non-bearing tree. In other words, let the tree struggle a bit, and it'll produce better fruit. Apple trees that flowered and don't fruit can be due to late freezes. The main and most common reason is too much fertilizer, even if you only used it in a surrounding area it could have run off effecting the apple tree.
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