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Chip from Louisville, Ky writes

How much Monterey B.t. Ready-to-Spray Insecticide would I need to treat 25 arborvitae trees that are 10 feet tall at least? A 32 oz bottle covers 3000 sq ft but that is difficult to convert to the number of trees.


Monterey B.t. Ready-to-Spray Insecticide is applied at a rate of 32 oz per 3000 sq ft. So if you are wanting to apply to all 25 trees you will need at least 8 bottles (possibly more or less) as one bottle should approximately cover 3-4 trees. We would recommend getting 1 or 2 bottles first and seeing how far it goes then moving forward from there.

Answer last updated on: 02/16/2021

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