|
CARPENTERWORM
Entrance hole to a carpenterworm's gallery in an
oak tree. |
| Species |
Prionoxystus robiniae |
| Common Hosts: |
Cottonwood Populus spp.
Oaks Quercus spp.
Willows Salix spp.
Other hardwoods |
Description |
Adult -- female moth light grayish-black body and front pair of wings, wingspan approximately 75 mm; male moth smaller and darker.
Larva -- size variable, approximately 65 mm long when mature; brown head, reddish-pink to greenish-white body. |
Importance |
Severe infestations can decrease the rate of growth of a tree. The large holes provide an ideal entrance for decay pathogens. Trees may be mechanically weakened and suffer wind breakage. |
Signs
of Infestation |
Sapstaining on bark. Wood chips and pellets at base of tree. Rough elongate holes in bark on trunk. Brown pupal skin protruding from holes. |
Control |
Identify and remove highly susceptible trees. Minimize injuries to trees; promote health. Use an approved insecticide to minimize possibility of infestation. |
Bulletin No. 196-A | Printed October, 1983 |
Contact the
Forest Health Section
