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
sequoia pitch moth
soldier beetle gallery
snapdragon plume moth new
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

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Western poplar clearwing

Parathene robiniae, the western poplar clearwing can be found on occasion attacking willows, aspens and poplars in nursery systems. The clearwing moths emerge from host plants in summer. The wasplike moths fly to trees where they lay eggs singly in bark crevices often near wounds. The larvae that hatch from these eggs move to a feeding site and begin to eat their way into the phloem and cambium and later form galleries in the wood. In the PNW it takes two seasons for the larvae to reach maturity and exit from the trees.

Damage is generally found in trunks and larger branches. Newly planted seedlings are often girdled. Sap oozes from wounds and granular frass can be seen.

Bentley et al. has useful info on chemical protection trials they did way back. More recent work is in the Brown et al. article and that refers to mating disruption program. There is much more on this topic in the dissertation by Kittleson. There has been use of entomopathogenic nematodes, S. feltiae, with a high success rate (88-90%).

Useful Resources

Bentley, W.J., J.F. Karlik and W. Afflect. 1989. Annual Sprays May Control Western Poplar Clearwing. California Agriculture. Vol. 48, no.4

Brown, J.J., N.T. Kittleson, E.R. Hannon, D.B. Walsh. 2006. An Endemic Population of Western Clearwing Moths (Lepidoptera: Sesiidae) Invades a Monoculture of Hybrid Poplars. Forest Entomology 99(3): 771-779.

Kittleson, N.T. 2006. Biology and Control of the Western Poplar Clearwing Moth, Paranthrene robiniae (Hy. Edwards), In Hybrid Polars. Dissertation. Dec. 2006.

Forest Pests of North America: Western poplar clearwing

Clearwing Moth Management Guidelines from UC IPM Online has good information for a variety of clearwing moths including a list of pheromone suppliers.

Another local pheromone supplier not included in the list above is Advanced Pheromone Technologies. This is a link to their technical guide for trapping sequoia pitch moth.

Original publication: 6/5/2009
Last update: 6/17/2016

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

western poplar clearwing
Photo: James Solomon
Website editor:
Robin Rosetta

Page last modified 6/17/16


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