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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Obscure Root Weevil

Obscure root weevil, Sciopithes obscurus Horn, most commonly found in landscapes, is becoming a more prominent weevil in nursery production in some sites in the Pacific Northwest. The behavior of this weevil tends to vary from other root weevils such as black vine root weevil. The adult sometimes remains in the foliage rather than climbing down the plant trunk to hide during the day. This weevil lays its eggs inside a folded edge of the leaf. Females can lay eight eggs/day, roughly equivalent to a black vine weevil, and the average cumulative production was just under 100 eggs/weevil in a lab study conducted by Tanigoshi et al. in 1999.

A wonderful resource to identify many common root weevils is available online at WSU's website and called Western Washington Field Guide to Common Small Fruit Root Weevils.

 

 

Obscure root weevil adult
Obscure root weevil adult
Photo: Jennifer Boyd
Obscure root weevil eggs in leaf fold
Obscure root weevil eggs
Photo: Ken Gray
 
Website editor:
Robin Rosetta

Page last modified 4/19/07

 

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