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

bronze birch borer
boxwood leafminer
boxwood psyllid updated
bulb flies
cabbage whitefly new
carnation tortrix new
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
cypress tip moth
dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
dustywings new
elm leafminer
European pine shoot moth
European wool carder bee
emerald ash borer
Fall webworm
flatheaded cedar borer
ground beetle gallery new
hollyhock weevil
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
Japanese beetle new
lacewings new
lady beetle gallery updated
leaf weevil
light brown apple moth
maple aphids updated
maple tip moth
maple midge
March flies updated
mountain ash sawfly
Narcissus bulb fly updated
Natural enemies gallery new
spruce twig aphid
oak ambrosia beetle
oak slug
oak twig gall wasp new
obscure root weevil
Pacific flatheaded borer
peach tree borer
peach twig borer
pear blight beetle updated
pear psylla
pear leaf-curling midge
pear sawfly
pine needle scale
pine and cone spittlebug new
poplar and willow borer
Psyllopsis fraxinicola updated
rose curculio weevil
rose midge
rove beetle gallery new
sequoia pitch moth
soldier beetle galleryn new
snakefly gallery new
speckled green fruitworm
meadow spittlebug updated
tent caterpillars
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil updated
woolly ash aphid
woolly beech aphid updated

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Sawflies on Douglas fir - Balsam fir sawfly

Neodiprion scutellatus is a sawfly found on Douglas fir and listed in references such as Western Forest Insects. But some entomologists call the sawfly found locally on Douglas fir by another name, balsam fir sawfly (Neodiprion abietis complex).  The complex apparently has 5 strains separated by geography and host: 4 in the Eastern US (2 on balsam fir, 1 each on white and black spruce) and 1 in the West.  The host list for the Western strain includes: Pacific silver fir, subalpine fir, Engelmann spruce, Sitka spruce, and Douglas-fir. The sawfly larvae images at this website more closely resemble the Neodiprion abietis images pictured at the Symphya website. As most sawfly identification is based on adult specimens, only a successfully-reared adult will confirm the true identity of these particular sawflies.

Sawflies can defoliate plants if occurring in large numbers. Damage from this pest is usually localized and may not require control or spot applications only. There are many natural controls (weather, parasites, diseases) that usually keep these populations in check. Images of the sawfly and damage can be found below right side of page.

Web links:

Balsam fir sawfly, Nova Scotia Natural Resources

Symphyta photos: Neodiprion scutellatus

2005 Forest Health Highlights in Oregon - cover shot shows damage.

Original version: <25 May 2010)

Last update <20 February 2017>

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

Feeding damage from Neodiprion sp. on Douglas fir
Neodiprion sp.

Close-up for feeding damage
Close up of feeding damage

Closeup of Neodiprion sp.
close up of Neodiprion

Website editor:
Robin Rosetta

Page last modified 2/20/17


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