Managing codling moth in pears (apples, too) involve both pesticides and various cultural activities. You're at the stage where you need to institute a number of cultural practices, among them these:
- Remove and destroy all obviously infested fruits. Do not compost.
- Destroy all infested windfalls.
- Cover each intact fruit with a footie or small paper bag.
- Use corrugated cardboard to trap the larvae (youngsters) as they move down the trunk to the soil. Attach the cardboard around the trunk or as a roll on the ground.
Consider using these low-toxicity strategies, both are available in home gardener packaging but may be difficult to locate:
- Apply CYD-X,, according to directions; it's a virus damaging to codling moths but not people or pets. (It's rather costly but quite effective.)
- Apply Kaolin Clay according to directions. (The "dusty" coating on the fruits is easily washed off.)