|
IPS ENGRAVER BEETLE
Chip cocoons made by mature larvae of the deodar weevil underneath the bark of an infested tree. |
Other: |
1. Small southern pine engraver
2. Eastern 5-spined engraver
3. Eastern 6-spined engraver |
| Species |
1. Ips avulsus
2. Ips grandicollis
3. Ips calligraphus |
| Common Hosts: |
Loblolly
pine Pinus taeda
Longleaf pine Pinus palustris
Pond pine Pinus serotina
Sand pine Pinus clausa
Shortleaf pine Pinus echinata
Slash pine Pinus elliottii
Spruce pine Pinus glabra |
Description |
Adult - size according to species --
Ips avulus approximately 3 mm long;
Ips grandicollis approximately 4 mm long,
Ips calligraphus approximately 5 mm long;
body reddish-brown to black; scooped out and spined rear end.
Pupa - size of adult; creamy white .
Larva - variable size, approximately 6 mm long when mature; orange-brown head, white body; legless. |
Number
of Generations |
8 to 10 generations per year, dependent on beetle species. |
Signs
of Infestation |
Foliage discoloration: needle color sequence, green to yellow to red to brown Small lumps of reddish-orange pitch (approximately 12 mm wide) on tree stem or branches. Reddish-orange boring dust caught in bark crevices or leaves of undergrowth plants. Narrow Y-shaped or H-shaped galleries in inner bark. |
Similar
Damage |
SOUTHERN PINE BEETLE: adult beetles have rounded rear ends; galleries S-shaped.
BLACK TURPENTINE BEETLE: adult beetle larger, approximately 9 mm long; pitch tubes larger and at base of tree; galleries D-shaped. |
Control |
Maintain
tree vigor and health. Avoid mechanical injuries to trees. Cut
and remove Ips engraver beetle-infested tree or peel bark and
destroy. Spray nearby uninfested or high-risk trees with an
approved insecticide during period of Ips engraver beetle activity.
NOTE: Natural enemies emerge after Ips engraver beetles. Delay
tree removal for up to three months if beetles have recently
left the tree to allow emergence of beneficial insects. |
Bulletin No. 196-A | Printed October, 1983 | Contact the
Forest Health Section 
