Skip to main content Skip to navigation

Coronavirus COVID-19

COVID-19 Advisory: WSU Extension is working to keep our communities safe. All Extension programming is being conducted consistent with the latest official state guidance. WSU Extension county offices and WSU Research & Extension Centers are following protocols for vaccination, masking, distancing and hygiene. If this office is not open to the public, we are available during normal business hours via email, phone, and web conference.

Backyard Fruit Tree Pests

This webpage is designed to help homeowners recognize key pests of backyard fruit trees and how to manage these pests to maintain tree health and fruit quality.

Codling Moth and Your Backyard Fruit Tree

Garza codling moth0017 cropedIf you grow apples, they will come! Codling moth, or the “worm in the apple,” directly impacts the eating quality of apples here in the state of Washington. When homeowners do not manage codling moth in their backyard trees, up to 80 to 95% of the fruit can become “wormy.” In the apple-producing areas of WA State, homeowners are legally responsible (RCW 16.09) to control this pest in host trees on their properties. The rationale behind this code is to protect fruit growers from economic losses caused by invasive pests or additional management strategies (often pesticide applications) to intercept pests from migrating to commercial orchards from neglected backyard fruit trees.