Mountain Pine Beetle Preventative Spraying
I live in Palmer Lake, near the border of El Paso and Douglas Counties. I have a number of fairly large pine-trees in my residential yard. For the past few years I have had the trees sprayed as a preventative for Mountain Pine Beetle, even though I have never seen any pine beetle damage in the area. I believe the company has used Bifenthrin.
I am curious if you recommend continued spraying. I am concerned about the environmental impact of repeated spraying with insecticides, especially in a residential area, and of the impact it has on bees, birds, etc.
Thank you very much for your time and help.
El Paso County Colorado trees and shrubs
Thank you for your question. CSU does provide information on preventative spraying for Mountain Pine Beetle - the link is: http://extension.colostate.edu/topic-areas/insects/mountain-pine-beetle-5-528/. I am also providing a link to information on Bifenthrin - http://npic.orst.edu/factsheets/bifgen.html . This Fact Sheet discusses the toxicity of the product.
I applaud your efforts to keep your trees healthy and protect the environment.