Tony from Petersburg, Wv writes
Will Bifen IT be both effective and long lasting if sprayed on wood decks, concrete, brick, asphalt, and vinyl siding?
Bifen IT is a great residual product, but just like any other insecticide, its not going to hold up long term to the environment. Most will give an outdoor residual of at least 30 days, and depending on how much UV rays break it down and rain you get, will determine whether it will last closer to 60 or 90 days. You can treat all the areas you mentioned with the Bifen for almost every insect. If you are looking to treat wood decks for wood destroying insects you would use a product like Boracare and then seal/stain the wood afterwards to keep it in. Please let us know if you have any other questions.
Answer last updated on: 05/27/2013
