Apple maggot / coddling moth

Asked June 30, 2020, 3:51 PM EDT

We have a single apple tree in front yard that has been neglected for many years. The few good apples we get from the tree are excellent, so we want to save it. Last year after harvest I put two wide strips of Tanglefoot around the base. Sprayed with dormant oil at Thanksgiving, New Years and Valentines day. The crop is better this year, but as I cull I see lots of infested apples - some with just a few spots on the skin, others with large dark spots. What can we do to save as many apples as possible, this year and next? Thank you! -Paul

Lane County Oregon

1 Response

Hi Paul,

You may want to consider some treatments for codling moth, or else practicing pest exclusion on the fruit using fruit sox or similar (https://www.homeorchardsociety.org/fruit-sox/)

Your current program isn't doing much against codling moth and maggot. The tangle foot is perhaps intercepting some of the codling moth larvae that crawl back to the tree after the infested fruit drop. Culling is a good practice and is helping, it is best to remove the destroy infested fruit removed from the tree. But, codling moths can fly in from afar and lay eggs on your tree causing infestation unless the fruit are protected.

Please see the "Managing diseases and insects in home orchards" for tactics: https://catalog.extension.oregonstate.edu/ec631/html

Looks like you have some scab going on too. Note that cultural practices can help with scab, making sure old leaves and fruit are not left over winter, pruning to improve air circulation in the canopy.