A carpenter bee begins her nest by drilling a nearly perfectly round entrance hole . It is a good idea to treat in the spring, when bees are first observed, again in . Efficient and precise, like any good carpenter, these bees (also known as boring bees) reappear each spring outside the Sanderson's Northeast Ohio home and begin drilling nearly perfect half-inch holes into the wood. Carpenter Bees. Fig. 1: Carpenter bee with shiny abdomen (left), bumblebee (right). Fig. 2: Entrance hole with sawdust. Fig. 4: Carpenter bees often repeatedly infest the same areas. Fig. 5: Applying insecticide into a tunnel under construction. Fig. 6: Carpenter bee traps may help reduce attacks on wood. Carpenter bees are species in the genus Xylocopa of the subfamily Xylocopinae. The genus The entrance is often a perfectly circular hole measuring about 16 mm (0.63 in) on the underside of a beam, bench, or tree limb. Carpenter bees do . Take measures to prevent the return of carpenter bees. The early fall is the best time to execute preventative measures because the galleries will most likely be . Best Bee Brother Carpenter Bee Trap effectively traps and kills carpenter bees trying to nest in your wooden structures. This low maintenance carpenter bee trap . For those considering a non-chemical approach to carpenter bee control, we recommend the Best Bee Trap. This trap is specially designed to attract and trap . Aller à SO WHAT IS THE 'BEST' CARPENTER BEE DUST? - Once dusted, leave the holes open for one day to ensure you get all the bees .