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

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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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