Cyonara 9.7 will only kill those beetles that are sprayed directly or that crawl on a treated surface and the label states should not be used alone for wood infesting pests but as a supplement. For powder post beetles, we would recommend using Bora-Care. The wood you are applying this product to must be untreated, meaning no sealants. You will use 1 gallon of Boracare with 1 gallon of hot water. You can either spray the wood or paint it on. Once the product is dry, you can apply any type of sealants to the wood.
Answer last updated on: 02/22/2018