![]() ![]() ![]() Dust: Use insecticidal dust in the fall and early spring to eliminate any existing carpenter bees or their eggs.Spray Insecticides: Spray the unfinished wood in these vulnerable areas (under rail sidings, under decks, around windowsills, etc.) with the recommended residual insecticides in either early spring or during active infestations (springtime).These screens allow you to still be able to spray dusts inside which is important the eggs are still inside the hole. For the existing Carpenter Bee holes, we recommend Carpenter Bee Blocker Kits that have stainless steel screens that fit in carpenter bee holes. ![]() These openings could include Carpenter Bee holes from the previous season. Seal openings: Seal as many exterior openings as possible before spring.A fresh coat of paint is unattractive to a Carpenter Bee. Varnish or paint these wood surfaces to make them less attractive to these bees. Finish wood: Carpenter Bees attack unfinished wood under decks, sills, and decks first.You can prevent carpenter bee infestations if you tackle the situation early in the season. Successfully preventing carpenter bees is determined by the time of year. After each spray treatment, apply D-Fense Dust or Tempo Dust to all possible carpenter bee nests, holes or entry points. We suggest an interval of two weeks for spray treatments. You may need to repeat carpenter bee treatments more than twice during the spring. If you apply in these areas in later winter, you could see residual effects that last through the carpenter bee season. When protected from the elements like rain, residual insecticides will last 2 to 3 months. Their holes are usually located on the underside of wood surfaces, We recommend spraying twice during the spring months at intervals of 3-4 weeks to most efficiently prevent carpenter bee damage. You will want to spray the areas where carpenter bees are boring into wood with residual insecticides such as Cyzmic CS, Demon WP and FenvaStarCap. The best times to apply are early spring before the infestation starts or during the active infestation. Spray A Residual Insecticide to Kill Carpenter BeesĪ great way to get rid of carpenter bees is to spray residual insecticides. ![]()
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