small white objects falling off gum tree

Question

Living in Sydney, our lemon scented gum (Eucalyptus citriodora) has recently started to drop very small white objects (like a cocoon of a very small insect). It’s too tall to see what’s happening up there. Do you know what is causing this?

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Answer 1

I believe this to be from the Gum Tree Scale.

Here is a link with more information and treatment.

http://www.nzffa.org.nz/farm-forestry-model/the-essentials/forest-health-pests-and-diseases/Pests/Eriococcus-coriaceus/Eriococcus-coriaceusEnt22