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
carnation tortrix 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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Cutworm Damage

In May, one can spot cutworm damage in the landscape on Dutch iris. The caterpillars take an almost sadistic pleasure in waiting until the irises are nearly ready to flower before they strike. They tunnel into the swollen buds to dine on the rich resources there. Or true to name, they wait until after the blossoms unfurl, then play logger, chomping into the stem, felling the iris. Timber.

Cutworm Resources

Berry, Ralph E. 1998. Black Cutworm Factsheet. Modified from Insects and Mites of Economic Importance in the Northwest. 2nd Ed. p. 221. 13 March 2014.

Berry, Ralph E. 1998. Variegated Cutworm. Modified from Insects and Mites of Economic Importance in the Northwest. 2nd Ed. p. 221. 14 March 2014.

Black Cutoworm Factsheet. Oregon State University. 13 March 2014. .  

Collman, S. and M. Bush. 2013. Dahlia - Cutworm. Pacific Northwest Insect Management Handbook. Hollingsworth, Craig S. (Ed.). Corvallis: Oregon State University. 13 March 2014.

Noctua Protuba - Large Yellow Underwing Moth. PNW Northwest Moths. 13 March 2014.

Opfer, P. and D. McGrath. Black cutworm and variagated cutworm. Oregon Vegetables. Oregon State University Extension. 13 March 2014.

Hahn, J. and Wold-Burkness. Cutworms in Home Gardens. University of Minnesota Extension. 13 March 2014.

Noctuid moth caterpillars also called cutworms or armyworms
Noctuid moth caterpillar
Cutworms often feed on the edge of leaves
cutworm damage on leaf
Cutworms commonly curl into a C-shape when disturbed
cutworm curled into C-shape
Cutworm damage on Dutch iris
cutworm damage on iris
Cutworm feeding damage on iris
cutworm feeding damage
Cutworm damage to iris
cutworm damage to iris
Cutworm damage to iris stem
cutworm damage to iris stem
Closeup of cutworm feeding damage
cutworm feeding damage
Website editor:
Robin Rosetta

Page last modified 3/13/14


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