how to deal with the apple tree pests?

I growed several apple trees in my garden, but apple tree pests makes me upset...is there a way to deal with the apple tree pests?

Many thanks

if its aphids then a light soapy spray on the leaves or even rub them off will help, i found that the year i mulched with manure the tree put on loads of new leafy growth and was attacked by aphids...so now i dont feed them at all, just thin the fruits after the june drop and they are fine