Apple trees can fall prey to a variety of problems.  Start spraying now!
This programme will control capsid, sawfly, wooly aphid, winter moth and codling moth insects. It also should help prevent or treat scab and mildew.

When to Spray

• When dormant in winter I sprayed with Mortegg tar oil until it was banned by the EU. Now you need to buy a winter wash.
• At bud burst spray a combination of Tumblebug and a fungicide like Systhane.
• Again as green buds then pink buds appear a similar spray is needed.
• At petal fall the worry is aphids so another spray may be needed.
• For codling moth infestations spray Tumblebug once a month from mid June.
• I do not spray once the fruitlets have set.
• Savona is a fatty acid based non-toxic spray that kills by contact and leaves no residue

Organic Spraying

• ehow have a list of spray methods that use such organic products as oil, copper sulphate, sulphur, Bacillus thuringiensis, and pyrethrin. Only nthe last of these would I think of as organic. see link
• Best solution is no solution to be sprayed. Grow resistant varieties and wrap fruit in paperbags to keep insects off.
• Make your own solution from garlic water or one of these recipies
• Grease bands are worth placing on the trunks of trees each autumn.