Contents: By Damage and Image
In progress
Contents: Alphabetical

alder flea beetle
aphid management
apple and thorn skeletonizer
apple ermine moth
ash whitefly
azalea bark scale
azalea lace bug
azalea sawfly
Bagrada bug
bark lice
Barypeithes root weevil
Beneficial nematodes
biocontrol of root weevils
birch aphid
black bean aphid
black cherry aphids
black stem borer
bluegum psyllid
Boisduval scale
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid
bulb flies
cabbage whitefly
carnation tortrix
carpet beetle (images)
Calligraph californica

Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
cinnabar moth
clay colored weevil
cottony camellia scale

crane flies
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
elm leafminer
European pine sawfly new
European pine shoot moth
European wool carder bee
emerald ash borer
Fall webworm
fir coneworm new
flatheaded cedar borer
ground beetle gallery
Hemerocallis gall midge new
hollyhock weevil
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
Japanese beetle
lady beetle gallery
leaf weevil
light brown apple moth
Linden aphid new
lupine aphid new
Macrosiphum rhamni new
maple aphids
maple tip moth
maple midge
March flies
mountain ash sawfly
Myzocallis sp. on red oak new
Narcissus bulb fly
natural enemies gallery
oak ambrosia beetle
oak slug
oak twig gall wasp
obscure root weevil
Pacific flatheaded borer
peach tree borer
peach twig borer
pear blight beetle
pear psylla
pear leaf-curling midge
pear sawfly
pine needle scale
pine and cone spittlebug
poplar and willow borer
Psyllopsis fraxinicola
rose curculio weevil
rose midge
rove beetle gallery
rose stem girdler
sequoia pitch moth
soldier beetle gallery
snapdragon plume moth new
snakefly gallery
speckled green fruitworm
meadow spittlebug
spotted asparagus beetle
spruce twig aphid
tent caterpillars
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
woolly alder aphid new
woolly ash aphid
woolly beech aphid

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Bronze birch borer

New Publication!
Sanchez, N. and D. Leavell. 2018. Homeowner Guide to Managing Bronze Birch Borer in the Upper Klamath Basin. Oregon State University Extension. March 2018. <21 September 2018>

The bronze birch borer, Agrilus anxius, is an increasingly common pest where it occurs in Oregon. Damage to susceptible species of birch trees can be severe, often deadly.

The presence of the bronze birch borer in the Portland metro area was positively confirmed as of October 23, 2003. The population at the detection site was extensive, quite established and has killed trees in the Beaverton/Tigard area. This was in addition to a positive identification in Corvallis. This flatheaded beetle borer continues to increase its distribution in Western Oregon. It may be possible to slow the movement of this borer by good site selection and choice of more resistant birches, cultural habits, and proper management of existing infestations which may include chemical intervention or tree removal. If you know landscapers in the area, please let them be alert to this.

The following websites offer more information regarding its life cycle, damage, and management.

Sanchez, N. and D. Leavell. 2018. Homeowner Guide to Managing Bronze Birch Borer in the Upper Klamath Basin. Oregon State University Extension. March 2018. <20 June 2018>

University of Illinois Extension Bug Review: Bronze Birch Borer. This site is nice for having both English and Spanish language versions of their fact sheet.

University of Minnesota Extension: The Bronze Birch Borer and Its Management
This has a nice chart listing the resistance of birch trees susceptibility to bronze birch borer. <20 June 2018>

Purdue Ornamentals and Turf: Bronze birch borer
pdf downloads with link.<20 June 2018>

USDA - Forest Service Forest Insect and Disease Leaflet 11- Bronze Birch Borer A nicely presented leaflet with good diagrams of classification of borer damage stages in trees. Older pub, read disclaimer at end. <20 June 2018>

Orginal publication: 10/22/2008
Latest publication: 9/21/2018


Author: R.L. Rosetta, Extension Nursery Integrated Pest Management, Department of Horticulture, Oregon State University


Bronze birch borer adult
bronze birch borer adult
Bronze birch borer adult and emergence hole
bronze birch borer and emergence hole
Stained bark and emergence hole indicating bronze borer infestation
stained bark and emergence hole
Bronze birch borer galleries (bark removed)
bronze birch borer damage
Photo: Ken Gray
Website editor:
Robin Rosetta

Page last modified 9/21/18


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