Contents: By Damage and Image
(In progress)
Contents: Alphabetical
alder flea beetle
aphid management
apple and thorn skeletonizer
apple ermine moth
azalea bark scale
azalea lace bug Updated
bark lice
Barypeithes root weevil
Beneficial nematodes
biocontrol of root weevils
birch aphid
black stem borer
bluegum psyllid
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid
bulb flies
carpet beetle New
Calligraph californica

Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
clay colored weevil
cottony camellia scale
cutworm Updated
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
elm leafminer
European pine shoot moth
European shot-hole borer
European wool carder bee
emerald ash borer
Fall webworm
flatheaded cedar borer
hollyhock weevil
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
lady beetle gallery
leaf weevil
light brown apple moth
maple tip moth
maple midge
March flies
mountain ash sawfly
spruce aphid on spruce
oak ambrosia beetle
oak slug
obscure root weevil
Pacific flatheaded borer
peach tree borer
peach twig borer
pear psylla
pear leaf-curling midge
pear sawfly New
pine needle scale
poplar and willow borer
rose curculio weevil
rose midge
sequoia pitch moth
speckled green fruitworm
tent caterpillars
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
woolly ash aphid

Back to Home

Contact Us

European shot-hole borer

The European shot-hole borer, Anisandrus (= Xyleborus) dispar, lives up to its name leaving trees with small diameter holes resembling tiny shot holes. An investigation of borer activity in Oregon nurseries indicated that this species of ambrosia beetle is active in various sites in the Willamette Valley. We've identified this borer in damage from container and field production sites. Click the hyperlink below to see a very informative website regarding this beetle.

The Ministry of Agriculture, Food, and Fisheries in British Columbia also has some photos of the beetles and damage:

Ministry of Ag website

The HYYP Zoologea website also has nice photos at the bottom of the page (website language is French).

The beetle has a large host range. Hosts include: Acer, Aesculus, Alnus, Betula, Castanea, Celtis, Crataegus, Corylus, Cydonia, Fagus, Fraxinus, Juglans, Leriodendron, Magnolia, Malus, Platanus, Populus, Prunus, Punica, Pyrus, Quercus, Salix, Tilia, Ulmus, and Vitis. There are also reports from Pinus, Cedrus, and cedar, and Tsuga. Check for current damage in trees which might have experienced stress. Sap weeping from the small diameter wounds is one symptom readily seen. These beetles often appear in large numbers even on the same tree.

We have found it extremely helpful for growers with a history of shothole borers to monitor flights of the borers. The Lindgren funnel trap with an ethanol lure (Contech) was used successfully in our research to obtain flight data for several common borers.

Literature cited:
Schuh, J. and D.C. Mote. 1948. Insect Pests of Nursery and Ornamental Trees and Shrubs in Oregon.

H. Omroa Bhagwandin, Jr. The Shothole Borer: An Ambrosia Beetle of Concern for
Chestnut Orcharding in the Pacific Northwest. Western Chestnut Growers Assn. Website

X. dispar near entrance hole
X. dispar adult
Photo: Rosetta
Holes from X. dispar emergence
image of borer damage
Photo: Rosetta
Weeping wound on plumweeping wound
Photo: Anonymous
Weeping wound on container plum
weeping wound from borer
Photo: Eric Smith
Lindgren funnel trap
Lindgren funnel trap
Photo: Eryn Cramer
Website editor:
Robin Rosetta

Page last modified 5/7/12


Before applying any of the information found on this site, please read our disclaimer.
Copyright © 2014, All Rights Reserved