|The biology of
the Asian Longhorned Beetle (ALB) is typical of many longhorned beetles
|There is one
generation of ALB each year. Like
other beetles, the ALB goes through 4 stages in its lifecycle.
chew out an egg niche in the bark of a live tree. She lays a
single egg, about 0.5mm long, oval and white in color, in the egg
niche. Eggs hatch in 1 to 2 weeks.
feed just below the bark while older larvae tunnel into the sapwood. Larvae periodically push coarse sawdust and
frass (fecal particles) out of their galleries. Larvae overwinter in tunnels and resume
feeding in spring.
in late spring or early summer and adults may emerge from early to
|Adults chew an
emergence hole, about one-half the size of a penny, and exit the tunnel. Adult beetles feed on the bark of small
shoots after hatching, but this feeding causes little damage to the tree. Each adult female can lay eggs for 6 weeks
or more and may produce 25 to 40 eggs during her lifetime.