What's your question? Ask

A good pH will be around 6. Here is a link to all the extension services pages on apple growing.

https://extension.umn.edu/fruit/growing-apples

Grapes too:

https://extension.umn.edu/fruit/growing-grapes-home-garden

You can take some small red balls--about the size of an apple--and coat them with a sticky material. Then hang your fake apples on your apple trees, putting about four per tree, at shoulder height. This baits the maggots and they stick to the balls, which can be discarded. Be sure to get rid of infested fruit already on the tree first. Another method you can try is combining 1 part molasses to 9 parts water and add just a tad of yeast. Pour into several wide-mouthed jars and allow them to ferment until the bubbling subsides. Then, you can hang the jars on some strong limbs on your apple tree.

This article should help as well: https://www.gardeningknowhow.com/edible/fruits/apples/apple-maggots.htm

This article will address apple worms: https://www.gardeningknowhow.com/edible/fruits/apples/apple-maggots.htm

This article will help you with addressing the apple scab:
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7413.html

I think that the soil may be lacking phosphorous, which can keep a plant from blooming. Give it some bone meal and that should help.

This article will also help with what else could be causing the problem:
https://www.gardeningknowhow.com/plant-problems/environmental/plant-not-blooming.htm

Could you please send us a photo of the fungus? We will be better able to identify it if we have a picture.