Wormy honeycrisp

Asked May 14, 2018, 9:55 AM EDT

My Honeycrisp apple tree was loaded with apples but they all had big indent or wormy. What is the best thing to prevent this, and when do I apply.

Blue Earth County Minnesota apple trees worms fruit tree sprays horticulture

1 Response

As much as we like apples, so do other creatures. There are a couple of possibilities, but you may have been experiencing problems with apple maggot. See this website below to view the pictures to see if the apple damage you had looks like that of the apple maggot or was due to some other cause. This will help guide you for what to do to prevent this this year. https://www.extension.umn.edu/garden/diagnose/plant/fruit/apple/fruitdeform.html For apple maggot problems, covering the apples as they develop, with a plastic bag with the end cut off will help protect the fruit as it grows, and does not require any use of insecticides. Bagging the apples should be done before the apple maggot flies appear end of June, first part of July. Other options to help with apple maggot problems include using traps or clay (see website below). If you choose to use insecticides, first confirm what type of insect problem you have by using the sticky traps and then use the correct insecticide at the right intervals, following the manufacturer directions. Removing fallen apples from the yard can also be helpful. More information about management of apple tree problems can be found at the link below. http://www.extension.umn.edu/garden/yard-garden/fruit/apple-pest-management/