Knowledgebase

Apple fruit diseases #277670

Asked September 12, 2015, 3:25 PM EDT

I have about eight apple trees growing on my property, and all are different varieties (which I can't remember the names of). We do not apply any sprays. Two trees are on an open hillside facing southeast about 600 feet from the other six. These two produce fruit which has clear flesh inside. The other six are growing in partial shade in a wooded area on disturbed soil. One of the other six (a golden early variety likely a Minnesota release in the past five or so years) has clear flesh. The other five seem to have several issues. I've attached pictures of apples from three varieties - whole and immediately after cutting. The smallest apple is a Haralson. Could you help me understand what may be the problem? We do have red and white cedar trees within about 100 feet of the six, and 400 feet of the two.

Le Sueur County Minnesota

Expert Response

It is apple maggot damage. Click on these links for more information from the University of Minnesota Extension:
It is not surprising that all the apples in a group are infected. It will be important to try to control the pests so apples are not infected next year and that the pests do not spread to the other apples.


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