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
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 ornamentals

There are a number of sawflies on ornamental plants. This year we have had reports of pear slug, Caliroa cerasi (L.) on hawthorn. Other host material for this sawfly includes cherry, mountain ash, pear, prune, and quince. The first brood of larvae is most abundant during June and July. The larvae of the second generation occurs in August and September.

OSU Fact sheet on pearslug
WSU Fact sheet onpear slug
UC Pest Management Guidelines: Pearslug


Another sawfly has been found this season on birch. Identified as a Caliroa species, I've included pictures of the larva and damage sent in by Todd Murray.

Berry, Ralph. 1998. Insects and Mites of Economic Importance in the Pacific Northwest, 2nd Ed. OSU Bookstore, Inc. Corvallis, OR, USA. 221 pp.

Schuh, J. and D.C. Mote. 1948. Insect Pests of Nursery and Ornamental Trees and Shrubs in Oregon. Station Bulletin 449. Agricultural Experiment Station, Oregon State College, Corvallis, OR, USA. 164 pp.

pearslug adult
adult pearslug
Photo: Ken Gray

pearslug eggspearslug eggs
Photo: Ken Gray
pearslug larva and damagepearslug larva and damage
Photo: Ken Gray
Caliroa sp. on birch
unidentified sawfly on birch
Photo: Todd Murray, WSU
Website editor:
Robin Rosetta

Page last modified 8/10/04


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