| 5458325 |
walnut twig beetle |
Pityophthorus juglandis |
Entrance and exit holes of the walnut twig beetle on black walnut. |
| 5454294 |
acorn and nut weevils |
Curculio spp. |
Destroyed acorn showing larval frass |
| 5454295 |
acorn and nut weevils |
Curculio spp. |
Destroyed acorn showing larval frass |
| 5454296 |
acorn and nut weevils |
Curculio spp. |
Frass found in destroyed acorn
Host: Quercus coccinea |
| 5454336 |
acorn and nut weevils |
Curculio spp. |
Destroyed acorn full of frass |
| 1541593 |
ambrosia beetles |
Xylosandrus spp. |
|
| 1269059 |
black stem borer |
Xylosandrus germanus |
Frass. Switzerland |
| 1457024 |
bronze birch borer |
Agrilus anxius |
Callus tissue formed by the larval feeding gallery, visible on the main stem. Photo taken in Moundsview, MN. |
| 5432271 |
goldspotted oak borer |
Agrilus coxalis auroguttatus |
Agrilus auroguttatus adult exit holes |
| 1419029 |
leaf-rolling weevil |
Homoeolabus analis |
nidus with egg pocket |
| 2109096 |
granulate ambrosia beetle |
Xylosandrus crassiusculus |
Frass tubes |
| 1476104 |
poplar borer |
Saperda calcarata |
Sawdust frass expelled from tunnel |
| 5393596 |
bronze birch borer |
Agrilus anxius |
Exit hole in bark |
| 5379276 |
poplar borer |
Saperda carcharias |
|
| 5080085 |
beech bark beetle |
Taphrorychus bicolor |
frass from boring |
| 5080089 |
beech bark beetle |
Taphrorychus bicolor |
frass from boring |
| 5080028 |
large timberworm |
Elateroides dermestoides |
frass from boring |
| 5080029 |
large timberworm |
Elateroides dermestoides |
frass from boring |
| 5080031 |
large timberworm |
Elateroides dermestoides |
frass |
| 5080032 |
large timberworm |
Elateroides dermestoides |
frass |
| 5080040 |
large timberworm |
Elateroides dermestoides |
frass |
| 5171035 |
emerald ash borer |
Agrilus planipennis |
forest canopy after infestation |
| 2111073 |
ash bark beetle |
Hylesinus varius |
ash bolts with entrance holes; 1990 |
| 1468023 |
poplar borer |
Saperda calcarata |
bark removed |
| 1457025 |
bronze birch borer |
Agrilus anxius |
External view of callus tissue formed over a larval gallery. Photo taken in Moundsview, MN, 2005 |
| 1457030 |
emerald ash borer |
Agrilus planipennis |
Bark removed by woodpeckers searching for emerald ash borer larvae and pupae in late winter, early spring. Photo taken in Ann Arbor, MI, 2004. |
| 1396010 |
bronze birch borer |
Agrilus anxius |
exit hole |
| 1396011 |
bronze birch borer |
Agrilus anxius |
exit hole |
| 1396079 |
pales weevil |
Hylobius pales |
gall close-up |
| 1627077 |
flatheaded or metallic wood borer |
|
The adult beetles have hard shells with a metallic lustre. The heads of the larvae are expanded and flattened. |
| 1419035 |
leaf-rolling weevil |
Homoeolabus analis |
aborted egg nidus |
| 1419064 |
leaf-rolling weevil |
Homoeolabus analis |
nidi in sawtooth oak |
| 1419065 |
leaf-rolling weevil |
Homoeolabus analis |
aging nidus on pin oak seedling in nursery |
| 1419069 |
leaf-rolling weevil |
Homoeolabus analis |
niduses - fresh (left) and 1-2 days old (right) |
| 1419103 |
leaf-rolling weevil |
Homoeolabus analis |
typical nidus on sawtooth oak |
| 1419026 |
leaf-rolling weevil |
Homoeolabus analis |
nidus first roll showing site of egg pocket; egg pocket in midrib end of nibus |
| 1419027 |
leaf-rolling weevil |
Homoeolabus analis |
oviposition "roll" completed in sawtooth oak seedling |
