BugwoodWiki Article

sixspined ips
Ips calligraphus (Germar, 1824)

Overview

Origin
The six-spined ips, Ips calligraphus calligraphus, the largest of the southern Ips species is native to the Americas. Ips beetles usually attack weakened, dying, or recently felled trees and fresh logging debris.
Life Cycle
Ips c. calligraphus adults are about 0.2 in. (5 mm) long and have 6 spines on each side near the posterior. Their eggs are oblong, pearly white, and about 0.04 in. (1 mm) long by 0.02 in. (0.5 mm) wide. Egg galleries, usually three to five, radiate from a central mating chamber and run up and down, grooving both the bark and the wood. The life cycle may be completed in 25 days, with six or more generations per year. The grub-like larvae are small, whitish, and legless, with orange-brown heads up to 0.04 in. (1 mm) wide. The pupae are waxy white and similar to adults in size. The eastern six-spined engraver commonly infests thick-barked pines and usually attacks portions of trunks that are 4 in. (10 cm) or more in diameter. This is often one of the first bark beetles to attack drought-stricken trees.
Distribution
Ips c. calligraphus is primarily an eastern subspecies that occurs naturally from southern Canada to the Gulf of Mexico. A small population has apparently been introduced into California.
Control Efforts
Beetle-caused damage can be reduced through one or more prevention or suppression techniques. Other control methods are burning, chipping, debarking, or burying infested portions of trees. Burning should be restricted to periods of low fire danger, and Federal and State laws should be observed. Land managers may consult their nearest county, State, or Federal forestry personnel for recommendations on management practices to be followed in a particular stand or area.

Resources

Selected Images


1540987
1540987

sixspined ips
Ips calligraphus
Adult(s)
Lacy L. Hyche
1541742
1541742

sixspined ips
Ips calligraphus
Galleries
Lacy L. Hyche
1254008
1254008

sixspined ips
Ips calligraphus
Galleries
William M. Ciesla
5432921
5432921

sixspined ips
Ips calligraphus
Adult(s)
Erich G. Vallery
1540980
1540980

sixspined ips
Ips calligraphus
Egg(s)
Lacy L. Hyche
1541006
1541006

sixspined ips
Ips calligraphus
Adult(s)
Lacy L. Hyche
1546002
1546002

sixspined ips
Ips calligraphus
Galleries
Ronald F. Billings
2516021
2516021

sixspined ips
Ips calligraphus
Adult(s)
David T. Almquist
2721036
2721036

sixspined ips
Ips calligraphus
Adult(s)
G. Keith Douce
2721037
2721037

sixspined ips
Ips calligraphus
Damage
G. Keith Douce
2721038
2721038

sixspined ips
Ips calligraphus
Damage
G. Keith Douce
3225003
3225003

sixspined ips
Ips calligraphus
Galleries
Ronald F. Billings

Taxonomic Rank

Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Atelocerata
Class: Hexapoda (including Insecta)
Infraclass: Neoptera
Subclass: Pterygota
Order: Coleoptera
Suborder: Polyphaga
Infraorder: Cucujiformia
Superfamily: Curculionoidea
Family: Curculionidae
Subfamily: Scolytinae
Tribe: Scolytini: Ipina
Genus: Ips

Other System Links

ITIS: 114938
NPDN Pest: INBQCCA

Synonyms and Other Names

Other Common Names:
six-spined engraver