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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Evergreen Trees and Shrubs > Pine > Holes in trunk or branches

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Pine > Trunk/Branches > Holes in trunk or branches

1 of 5
  • Ips bark beetles 1
  • Ips bark beetles 2
  • Ips bark beetles 3

Ips bark beetles
Ips spp..

  • Adults bore numerous holes less than 1/8 inch diameter in bark which can resemble being shot by a BB gun or shot gun
  • Entrance holes often have a reddish-brown, resin-soaked fine sawdust
  • Larvae feed under bark
  • Needles turn yellow and reddish-brown
  • Adults are dark brown to black and range in size from about 1/8 to ¼ of an inch long
  • Favors stressed pines of all species
  • More information on Ips bark beetles...
2 of 5
  • Yellow bellied sapsucker 1
  • Yellow bellied sapsucker 2
  • Yellow bellied sapsucker 3

Yellow bellied sapsucker
Sphyrapicus varius

3 of 5
  • Red turpentine beetle 1
  • Red turpentine beetle 2
  • Red turpentine beetle 3

Red turpentine beetle
Dendroctonus valens

  • Pitch tubes present, i.e. small masses of pitch at entry hole pitch tubes, on lower 3 feet of trunk
  • All pine species susceptible but favors stressed trees
  • Adults reddish-brown, ¼ - 3/8 of an inch long
  • More information on Red turpentine beetle...
4 of 5
  • Pine root collar weevil 1
  • Pine root collar weevil 2
  • Pine root collar weevil 3

Pine root collar weevil
Hylobius radicis

  • Large amounts of pitch are exuded, darkening the root collar and nearby soil
  • Discolored needles, from yellow to reddish-brown on entire tree
  • Infested trees often tip due to feeding damage
  • Most pine attacked; prefers pine growing on sandy soils with heavy grass competition
  • Adults are ¼ inch long, reddish brown to black with whitish to yellowish spots (patches of scale); has conspicuous snout
  • Larvae about ⅓ inch long, whitish and grub-like
5 of 5
  • Pileated woodpecker damage 1
  • Pileated woodpecker damage 2
  • Pileated woodpecker damage 3

Pileated woodpecker damage
Dryocopus pileatus

  • Single or multiple deep holes in trunk or branches
  • Holes sometimes round, typically elongated, up to 12"
  • Creates holes while foraging for carpenter ants
  • Trees prone to wind breakage from weakened structure
  • Attacks most mature tree species

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