I don't have a recipe of my own, but found information at the links below.

You can buy 100% pure cedarwood oil.

How are you using it? Small pets or pet bedding? Equine? Lawn and garden?

Here is a link that might be useful: A couple of recipes

Actually we have fogged with the 10% cedar oil product 8 times. I have spent a few thousand and I'm getting no where fast. Thanks for trying to help. From my readings, not all things work for all people. We've had this since Sept. 2012.

mrsgym-
What exactly are you trying to control or accomplish?

If you are trying to get rid of rodents, I suggest PEPPERMINT OIL (pure and without additives). Amazon sells it for about $32 for 12 or 16 ounces. It does a fabulous job of getting rid of small rodents, as they can't tolerate the menthylated stench. This is the only thing that stopped chipmunks from nesting under my concrete slab. Once chipmunks made the holes, snakes and other critters bumped the chipmunks.