What’s Wrong With My Apple Tree?

Question

The leaves look like this. What do I do?

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Answer 1

This looks like leafminer damage that has progressed into more severe damage.

Here are some articles that will help:

https://www.gardeningknowhow.com/plant-problems/pests/insects/leaf-miner-control.htm

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.gardeningknowhow.com/edible/fruits/apples/apple-tree-planting.htm