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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Cereal leaf beetle

Cereal leaf beetle, Oulema melanopus (L.), is best known as an introduced pest of cereal crops such as wheat, barley, oats, rye and various grass crops such as Timothy hay, perennial rye, brome, and sudangrass. Their wide host range also includes reports of their occurence on the ornamental grass, Calamagrostis. One nursery in Oregon has reported cereal leaf beetle feeding on Calamagrostis planted adjacent to a nearby wheat field.

Both the larval and adult stages of these leaf beetles can feed on their grass hosts. Currently only the adult beetles have been found on the ornamental grasses, thought to have moved over with the harvest of the adjacent wheat crop.

Web Resources:

OSU Extension: Cereal Leaf Beetle This site has useful information on biology and life stages as well as images of the larval stage. Keep in mind that the monitoring, thresholds, and management information have been developed for cereal crops rather than ornamental grasses.


Original version: <9 August 2011)

Last revision <11 August 2016>

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


Cereal leaf beetle on Calamagrostis
cereal leaf beetle
Photo: Anonymous
Cereal leaf beetle feeding damage
cereal leaf beetle feeding damage on Calamagrostis
Photo: Anonymous
Website editor:
Robin Rosetta

Page last modified 8/11/16


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