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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Birch aphids

Birch aphids are common on leaves of birch. According to Aphids on World Plants, there are 72 species of aphids in 18 genera feeding on Betula species. The PNW Insect Management Handbook lists the aphid, Euceraphis betulae on birch. This species is associated with Betula pendula, European silver birch.

Young aphid nymphs hatch (eclose) from overwintering eggs in late April or May. These aphids will feed and soon reach adult stages. They can reproduce without mating so populations of aphids on the spring growth can enlarge rapidly.

Monitor for the eggs near buds and the aphids on new growth and leaf undersides.

For information on management of aphids, check the PNW Insect Management Handbook.

Web resources:

Euceraphis betulae, Silver birch aphid Natural History Museum. Great site from the United Kingdom with nice images and good detail

Birch Aphid: Insects and Diseases of Alaskan Forests. USDA-Forest Service. R10-TP-87 April 2001. Search under the Index to Insects by Host Plants on the navigation bar.

Blackman, R. and J Holopainen. A year in the life of a birch aphid.

Aphids on Worlds Plants website: Betula-A detailed key of aphids listed on birch species.

Birch aphid eggs overwintering near leaf bud
birch aphid eggs
Photo: Ken Gray
Young nymphs on expanding foliage
birch aphid nymphs
Photo: Eric Smith
Winged adult (alate) birch aphid
Winged adult birch aphid
Photo: Ken Gray
Website editor:
Robin Rosetta

Page last modified 5/6/11


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