Q.Oil spray for scale
Your recipe for an oil spray to treat scale says that you can also include a cup of alcohol. Is that rubbing alcohol? Is that safe for trees?

BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on June 4, 2018
Yes, this will be rubbing alcohol. This will be safe for trees, but only use one application with alcohol to avoid harming the tree.
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