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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Western spotted cucumber beetle

The western spotted cucumber beetle, Diabrotica undecimpunctata, is commonly found feeding on ornamental plants. It is rarely in such large numbers that it must be controlled. When large populations do appear they can cause leaf damage and can be found feeding on terminals of shade trees, potentially causing loss. We have reports of spotted cucumber beetle damage on black locust, Caragana, hackberry, elm, tilia, Zelkova, honeylocust, and laburnum. Damage has also been reported on dahlias, peonies, and hibiscus, The following pictures are of cucumber beetle damage on hibiscus.

Spotted cucumber beetle damage
spotted cucumber beetle damage
Photo: Rosetta
Adult cucumber beetle feeding
adult beetle feeding
Photo: Rosetta
Feeding damage
feeding damage
Photo: Rosetta
Adult beetle in leaf
cucumber beetle adult
Photo: Rosetta
Adult beetle in Alyssum.
cucumber beetle
Photo: Rosetta
Website editor:
Robin Rosetta

Page last modified 6/5/09


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