Contents: By Damage and Image
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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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Ceanothus stem gall moth

A sporatic but potentially damaging pest, the ceanothus stem gall moth, Periploca ceanothiella (Cosens), is present throughout the west coast in concert with the distribution of Ceanothus species. The moth lays eggs on the buds and flowers of Ceanothus. The young larvae bore into the stem and feed within causing tissue to gall. The larvae overwinter inside these galls which are very noticeable in the early spring. They then pupate and emerge as adult moths in summer.

Research by Munro in 1963 showed a wide range of susceptibility of Ceanothus species. Pruning out and disposing of galled materials may reduce overall damage as the moth only has one generation a year.


Munro, J.A. 1963. Biology ofthe Ceanothus stem-gall moth, Periploca ceanothiella (Cosens). J. Res. Lepid. 1:183-190.

Johnson, W.T. and H.H. Lyon. 1991. Insects that feed on trees and shrubs. 2nd ed. Cornell University Press, New York. pp.438-439.

Galls of ceanothus stem gall moth
galls of ceanothus stem gall moth
Photo: Rosetta
Closeup of gallscloseup of gall
Photo: Rosetta
Gall near flower buds
gall near flower buds
Photo: Rosetta
Website editor:
Robin Rosetta

Page last modified 3/14/05


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