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 new
sequoia pitch moth
soldier beetle gallery
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

Back to Home

Contact Us

European pine sawfly

A new pest in the Willamette Valley, European pine sawfly, Neodipiron sertifer, is a pest of pines. The sawfly larvae feed in a gregarious manner, dining through an impressive amount of needles. Detected in the Albany area of Oregon, I've learned damage has been spotted as far south as Cottage Grove.

Larvae have black heads and are light-to-dark gray with light and dark stripes. They have fleshy prolegs without any of the hooked crochets that are found on true legs of caterpillars.

This species of sawflies has one generation per year. It overwinters as eggs, that were laid within slits in needles in the fall. One sawfly female will lay several eggs in each needle in a cluster of needles (Hoover and Barr 2002). Eggs hatch in the late spring, April or May (sightings of N. sertifer larvae coincided with full bloom of black locust in 2018 in the Willamette Valley). They feed gregariously on older needles. Mature larvae drop to the ground in late May and June, eventually pupating in a brown cocoon in August. Adult sawflies emerge in September (Hoover and Barr 2002).

Management targets early feeding activity. Cultural control includes hand picking, use of forceful jets of water to dislodge the larvae, or pruning off infested limbs, if possible without aesthetic damage. Pheromone traps are used for monitoring. Chemical control is aimed at the young larvae. Although the sawfly larvae resemble caterpillars, they are not susceptible to the Bt or Bacillus thuringiensis subsp. kurstaki products. There may be promise to manage this pest with mating disruption (Östrand et al, 1999).


Cloyd, R. 2017. European pine sawfly. Kansas State University. April, 2017 <20 June 2018> Nice images, chemical control info.

Hoover, G. and N. Barr. 2002. European pine sawfly. Penn State Extension. <1 May 2018> Very thorough with lots of information.

Östrand, F., Wedding, R., Erling, J., and O. Anderbrant. 1999.Effect of mating disruption on the reproductive behavior in the European pine sawfly, Neodiprion sertifer (Hymenoptera: Diprionidae). Journal of Insect Behavior. March 1999. Vol. 12, Issue 2,

Original publication: 5/1/2018
Most recent update. 6/20/2018

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



European pine sawfly larvae feeding on pine
European pine sawfly larvae

European pine sawfly larvae
European pine sawfly larvae

Jumping spider with European pine sawfly larva
Jumping spider with European pine sawfly larva

European pine sawfly damage
European pine sawfly damage

European pine sawfly damage
European pine sawfly damage

European pine sawfly damage
European pine sawfly damage


Website editor:
Robin Rosetta

Page last modified 6/20/18


Before applying any of the information found on this site, please read our disclaimer.
Copyright © 2019, All Rights Reserved

Oregon State University Extension Service prohibits discrimination in all its programs, services, activities, and materials on the basis of race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, familial/parental status, income derived from a public assistance program, political beliefs, genetic information, veteran’s status, reprisal or retaliation for prior civil rights activity.
El Servicio de Extensión de Oregon State University prohíbe la discriminación en todos sus programas, servicios, actividades y materiales en base a la raza, color, origen nacional, religión, sexo, identidad de género (incluyendo la expresión de género), orientación sexual, discapacidad, edad, estado civil, estatus de la familia/padres, ingresos derivados de un programa de asistencia pública, creencias políticas, información genética, estado de veterano, represalia o represalia por actividad previa de los derechos civiles.