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Contents: By Damage and Image
In progress
Contents: Alphabetical
A B C D E F G H I J K L M N
O P Q U R S T U V W X Y Z

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
borers
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
caterpillars
Ceanothus stem gall moth
cereal leaf beetle
cherry ermine moth
chilli thrips
cinnabar moth
clay colored weevil
cottony camellia scale
cutworm
crane flies
cypress tip moth
dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
dustywings
earwigs
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
hoverflies
honeylocust plant bug
honeylocust pod gall midge
Heliothis phloxiphaga
holly bud moth
huckleberry root aphids
ground mealybug
Japanese beetle
lacebugs
lacewings
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
roseslug
rove beetle gallery
rose stem girdler new
sawflies
scale
sequoia pitch moth
soldier beetle gallery
snakefly gallery
speckled green fruitworm
meadow spittlebug
spotted asparagus beetle
spruce twig aphid
tent caterpillars
thrips
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil
whiteflies
woolly alder aphid new
woolly ash aphid
woolly beech 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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