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What is causing the white wool-like fungus on my apple tree?

Our Advice:

This is an insect woolly aphid and the wool is a type of waterproof wax. Spraying with insecticides, such as Resolva Bug Killer from Westland or Sprayday Bayer Greenfly Killer'>Greenfly Killer from SBM/Bayer, will kill these insects as they feed. The tree must be in leaf when you spray so that the plants can take up the chemical into their sap stream.

Gardening Expert: Steve Bradley

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