The Q&A Archives: Apple Tree Fungus

Question: I have a golden delicious apple tree. Now that its winter, I notice that the branches have a splotchy green fungus on them. Someone mentioned to me that this condition should be treated during the winter. Can you tell me what needs to be done? and when? Thank you for your help.

Answer: Apple trees often play host to various mosses and lichens. These are harmless, but not very attractive. You can kill the mosses and lichens with a lime-sulfur (Bordeaux) spray, which will also protect your apple tree from scab disease. Applications of lime-sulfur are made during the dormant season (now), and repeated at specific intervals. Check the product label and spray according to label directions.

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