![]() This information is for educational purposes only. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. Carpenter Bee Damage Carpenter bee larvae in galleries Carpenter bee to bumble bee comparison ( Xylocopa and Ceratina species)īe sure to read and follow all the instructions and safety precautions found on the pesticide label before using any pesticide. Painting or otherwise sealing the wood is reported to discourage the bees from chewing their holes.īe sure to read and follow all the instructions and safety precautions found on the pesticide label before using any pesticide. If large areas are affected then a persistent insecticide like cyfluthrin (sold as Bayer Advanced Garden Insect Control for homeowners or Tempo for commercial applicators) can be used to treat the entire area. ![]() If only one or two gallery openings are involved then an aerosol Bee and Wasp spray should be enough to kill off the bees. Most species of carpenter bees in Michigan have a single generation per year.Ĭarpenter bees can be controlled by applying a registered insecticide to the gallery opening. Each larva is provisioned with a ball of pollen and sealed into a single cell until it completes its development the following spring. These bees do not eat wood like a termite does but they use their galleries to raise their young. Carpenter bees seem to prefer softwoods like cedar, redwood and clear pines used in window trim, screens, soffits and fascia boards, and decks. The tunnel created by the boring bee is so perfectly round that it appears to have been drilled by a tool. Carpenter bees can be serious wood destroying insects if they choose your home to build their nest galleries. Other species of carpenter bees may be black, green or somewhat purplish with various markings of whitish, yellowish, or reddish hairs, and may be considerably smaller. ![]() The top of the abdomen of carpenter bees is bare and shiny whereas the abdomen of bumblebees is covered with black and yellow hairs. The most common carpenter bee in Michigan resembles many of the closely related, large yellow and black bumblebees we have here. Carpenter bees ( Xylocopa and Ceratina species) ![]()
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