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Ginkgo Tree

Q.Substance On Ginkgo Tree Bark

Zone L4A 4P2 | Cancarvi added on June 15, 2020 | Answered

Does anyone knows what are these grey colour substance on the ginkgo tree?

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Certified GKH Gardening Expert
Answered on June 17, 2020

That is one of many Scale insects. You will have to remove what you can, manually, then spray with an insecticide.

Since they seal themselves to the plant, insecticide alone will not suffice.

Here are some articles for more information:




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