Perry from Westwego, La writes
For effective control, you should reapply Demon WP or Demon Max (they each contain the same active ingredient- WP will dry with a white film to surfaces treated) every 4 weeks through the carpenter bee season. Usually carpenter bees come twice a year, once in the spring and then again in early fall. Please take a few moments to review our treatment article on How to Get Rid of Carpenter Bees for a successful program.
Answer last updated on: 03/20/2018