Mike from Great Falls, Mt writes
Bifen IT is labeled for "weevils" in general and the active ingredient Bifenthrin is known to be effective for white pine weevils. It is important when using a foliar application that treatments start when adult weevils first start to appear in spring, usually around mid-April. At this time, Bifenthrin seems to be the only active ingredient available to homeowners for white pine weevil control. We also suggest you contact your local cooperative extension office for more tips on the best treatment time in your specific area
Answer last updated on: 06/17/2014
