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 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
cinnabar moth
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 Updated
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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Clay colored weevil

Clay colored weevil, Otiorhynchus singularis (CCW), can be damaging to ornamental plants. It is considered a cool season weevil, with key activity in the spring and fall. First emergence of the new adults is in the early spring, often in March. This is quite early compared to black vine weevil, our more common root weevil in nursery production. Like black vine weevil, CCW are all female. Egg laying or oviposition tends to be bi-modal beginning in mid-May, ending in late June and beginning again in September, lasting into October. Not as fecund as black vine weevil which can lay approximately 200-to-400 eggs per season/adult, CCW will lay much fewer eggs, around 30 eggs per season/adult. While not prolific, they tend to escape most weevil management activities which are generally timed for black vine weevil control and too late to break the life cycle of this early season weevil. Most of the research on this weevil has occurred in small fruit production.

Websites with more information and images:

WSU's Clay colored weevil photo gallery in Meeker raspberries

WSU's Studies of clay colored weevil in Meeker raspberries. This site is rich with information that can be useful for nursery growers troubled by this pest. The oviposition and chemical management section is highly recommended.

clay colored weevil
Photo: Rosetta
Website editor:
Robin Rosetta

Page last modified 5/14/04


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