Green harvest have on their website some very good and simple ways to manage codling moth, without resorting to chemical sprays. Try it and look for more information on their site.
Everyone knows the old joke: what is worse than finding a worm in your apple? Answer: Half a worm. The saying refers to the larva of the Codling Moth (Cydia pomonella), which originated in Europe but is now found in most countries that grow apples. It also attacks pears, nashi pears, quinces, and occasionally walnuts and stone fruits.
Suggested Organic Strategies: