| |
Carpenter
Bee
Characteristics –
Size: The species of most importance are about 1-inch long and have a
robust, bee-like shape.
Color: Like bumblebees, carpenter bees are black with some yellow.
One carpenter bee species in the southwest, the valley carpenter bee, has a
metallic-black colored female and a tan colored male.
Carpenter bees resemble bumblebees in both size and color. Most carpenter bees
have yellow hairs on their thorax but their abdomens are all black and shiny
with few hairs. However, bumblebees have hairy abdomens, often with considerable
amounts of yellow coloration.
Behavior –
Carpenter bees chew out tunnels in wood in which to lay their eggs and provide a
protected site for their larvae to develop. The female bee selects a suitable
log or piece of wood and chews a round, 1/2-inch diameter tunnel into the wood.
About one-inch deep, she turns at a right angle and chews a tunnel (nest
gallery) about 12 inches in length. The bits of wood she chews off are deposited
outside the nest and end up on the ground below. These bits of wood, called
frass, often are streaked yellow from pollen on the female s legs. An egg will
be deposited at the end of the nest gallery; the female will then pack the
gallery about an inch deep with pollen. This process is repeated until the
entire gallery has been filled. The male carpenter bee guards the outside of the
nest and tries to chase away potential predators. He does not have a stinger,
but still causes concern with his aggressive buzzing if people venture near the
nest site.
Habitat – In nature, logs and dead trees and limbs are the
targets for carpenter bees as nest sites. On homes, bare wood decks, fences, and
window sills is usually attacked. Painted wood, however, is subject to attack
although bare wood is preferred.
Tips for Control – Painting bare wood that is being attacked
by carpenter bees can deter some bees; however, it does not offer the best
solution.
 | If the wood targeted by bees is treated with a residual pest control
product, carpenter bees may be repelled or killed by the treatment.
| Once holes have been started, the nest galleries may be treated.
| The holes can be plugged several weeks later when it is positive that the
bees have been killed. |
| |
|
