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Preventing Worms in Apple Trees #869240

Asked May 20, 2024, 11:48 AM EDT

Hi, we have 3 young semi-dwarf apple trees, (Kindercrisp, Zestar, and Harelson, I believe). And we have gotten apples on the Harelson before, but they have worms. Can you tell me what I need to do to prevent this? Thank you so much!

Carlton County Minnesota

Expert Response

Thank you for writing.
I prefer this method
https://hort.extension.wisc.edu/articles/bagging-apples-for-insect-and-disease-control/
There are sprays too. 
https://yardandgarden.extension.iastate.edu/how-to/spray-schedule-home-apple-trees

The key prepatory steps are
Keep the ground under the trees meticulously clean.  This is where the worms breed
Prune the tree so that the apples are accessible.
Reduce each cluster of apples to the single best apple to increase yield and improve quality
Steve Miles, Master Gardener, Hennepin County MN (I am a human being, not a bot nor AI). I am an avid gardener but am not a degreed or certified horticulturist or arborist. I am happy to receive follow-up questions if my responses are incomplete or unclear.  This is the University of MN' garden soil testing service.  https://soiltest.cfans.umn.edu/testing-services/lawn-garden This is guidance on how to find a tree expert.  https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional The Minnesota Landscape Arboretum is a wonderful place to see and learn about plants that grow in Minnesota. https://mngardens.horticulture.umn.edu/minnesota-landscape-arboretum Replied May 20, 2024, 12:13 PM EDT

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