Document Type
Peer-Review Article
Abstract
Anisandrus obesus LeConte constructs entrance holes uniformly over the surface of Big Tooth Aspen (Populus grandidenta Michx.) in April each year. An individual female bores a single entrance tunnel about 7 mm into the sapwood and then two lateral tunnels parallel to the surface. After symbiotic fungal growth, eggs are laid along the gallery walls by May. Three larval instars consume the beetle’s symbiotic fungus and do not expand the gallery. Pupae develop through June with progeny adults appearing by mid-July. Progeny sex ratio of approximately 6 females to 1 male was observed. Progeny adults overwinter within the parental gallery; in the spring only females emerge through the parental entrance holes to fly and attack new woody hosts. Anisandrus
Recommended Citation
Cassar, Steven; Roeper, Richard; Beck, Robert; Pomeroy, Todd; and Bruce, Mark
2025.
"Gallery Characteristics and Life History of the Ambrosia Beetle Anisandrus obesus (Coleoptera: Curculionidae: Scolytinae) in Big Tooth Aspen,"
The Great Lakes Entomologist, vol 49
(3)
: 169-172
DOI: https://doi.org/10.22543/0090-0222.2533
Available at:
https://scholar.valpo.edu/tgle/vol49/iss3/6
