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
borers
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid
bulb flies
carpet beetle New
Calligraph californica
caterpillars

Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
clay colored weevil
cottony camellia scale
cutworm Updated
craneflies
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
earwigs
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
lacebugs
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
roseslug
sawflies
scale
sequoia pitch moth
speckled green fruitworm
spittlebug
tent caterpillars
thrips
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
whiteflies
woolly ash aphid

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Dogwood sawfly

Dogwood sawfly, Macremphytus lovetii, a native sawfly, has been noted in Whatcom County, WA recently and has also been found in King County in Bellevue in years prior. According to Sharon Collman at WSU Extension, it completely strips plants at the end of season. It may become a problem, in particular, on plantings of red osier dogwood. The larvae didn't show up until late season just before late August. In that particular infestation, the larvae were all on the top leaves and could be seen in outline from the backlighting of the sun through the leaves. In another site, the tree had a heavy infestation which was pruned off that same year. Larvae did not return the next year. Parasites have been found associated with the larvae found in King County.

The larvae leave the dogwood to pupate and will burrow into soft wood, and possibly soil, so house siding near a plant may be pitted with pupating chambers. Further damage may occur to structures from woodpeckers seeking to feed on the overwintering insects.

Impact on both native landscapes and dogwoods produced in nurseries can be significant but possibly short lived.

dogwood sawfly
Photo: Jill Cotton
More information can be found at the following link:
Dogwood Sawfly Fact Sheet: Penn State Woody Ornamentals Integrated Pest Management.
 
Dogwood sawfly larva
dogwood sawfly larva
Photo: Steven Katovich, USDA Forest Service, Forestry Images
Website editor:
Robin Rosetta

Page last modified 9/17/08

 

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