Do you know what type of pest is making these black fluffy nests on my orange tree and what’s the best way to control them?

Question

I try to spray with eco oil regularly.

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Answer 1

I have researched pests of orange trees and find nothing like this. You can probably remove them with gloved hands if you can reach them easily.

I would seek local help from a plant nursery or a university horticultural department in Australia.