My apple tree is 6 years old and this is the first year it has produced fruit, but also the first year that the tree seems to be sick. The fruit has black spots and some of the leaves are yellow, browning on the tips or curling. The weather has been heavy rains with dry spells and very hot. We do not spray the tree and I did not fertilize it this year. Does anyone have an idea what is going on and how we can avoid it next year?