sawflies

alder flea beetle
aphid management
apple and thorn skeletonizer
apple ermine moth
azaleae bark scale
Barypeithes root weevil
Beneficial nematodes
black stem borer
branch and twig borer
brown marmorated stink bug
bronze birch borer
boxwood leafminer
boxwood psyllid
caterpillars UPDATED
Ceanothus stem gall moth
cherry ermine moth
clay colored weevil
craneflies
cypress tip moth
dogwood sawfly New
Douglas fir twig weevil
earwigs
elm leafminer
European pine shoot moth
European shot-hole borer
emerald ash borer
Fall webworm NEW
flatheaded cedar borer
honeylocust pod gall midge
huckleberry root aphids
ground mealybug
lacebugs
leaf weevil
maple tip moth
maple midge
March flies
spruce aphid on spruce
obscure root weevil
Pacific flatheaded borer
pear leaf-curling midge
pine needle scale
poplar and willow borer
rose curculio weevil
rose midge
roseslug
sawflies
scale NEW
sequoia pitch moth
spittlebug
tent caterpillars NEW
thrips
viburnum leaf beetle
western poplar clearwing
western spotted cucumber beetle
white pine weevil NEW
whiteflies
woolly ash aphid

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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.

References:
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.