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Solving Apple Tree Fruit Damage and Bark Lichens

Separate Issues: Lichens on Bark vs. Insects in Fruit

Green/blue bark growth is lichen—harmless, indicates slow growth. Fertilize with 10-6-4 per tree age (see OSU factsheet). Holes in apples are from insects (maggots, curculio) or disease. Both controlled with same insecticides. Consult local nursery for spray schedule. OSU resources: hyg-fact/1401.html and lines/fruit.html.

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