Q.Tree lichens and copper sulfate
If I want to use copper sulfate to minimize or treat tree lichens is the copper sulfate harmful to animals, especially pets such as cats and dogs?
Downtoearthdigs
Answered on April 11, 2017
Yes, Copper Sulfate is a poison to humans and pets.
This link will help you.
https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
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