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Helen from Gallatin, Tennessee writes,

What concentration should I use to treat the carpenter bees gallery holes and home ext. in a cedar log house?

What concentration of Permethrin SFR 36.8% should I use to treat the exterior of my home and also spraying into the gallery holes the bees live in in my cedar log house? Concentration of oz/gallon h20 exterminating carpenter bees? How many oz/gallon of water I have already purchased a 32 oz bottle and have done a test. I used 1 oz per gallon, but wish your insight. I need to spray the exterior of my entire house and wish your professional assistance with ratio... Thank YOU!


We recommend using 1 2/3 fl. oz per gallon of water for carpenter bee control. You should plan on spraying one time per month through the carpenter bee season.

Answer last updated on: 04/28/2013

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