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
azalea sawfly New
bark lice
Barypeithes root weevil Updated
Beneficial nematodes
biocontrol of root weevils
birch aphid Updated
black bean aphid New
black stem borer
bluegum psyllid
borers
branch and twig borer
brown marmorated stink bug

bronze birch borer
boxwood leafminer
boxwood psyllid Updated
bulb flies
cabbage whitefly new
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
craneflies
cypress tip moth

dogwood sawfly
Douglas fir sawfly
Douglas fir twig weevil
dustywings New
earwigs
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
lacebugs
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
rose curculio weevil
rose midge
roseslug
rove beetle gallery New
sawflies
scale
sequoia pitch moth
soldier beetle gallery New
snakefly gallery New
speckled green fruitworm
meadow spittlebug updated
tent caterpillars
thrips
viburnum leaf beetle
violet gall midge
western poplar clearwing
western spotted cucumber beetle
white pine weevil Updated
whiteflies
woolly ash aphid
woolly beech aphid Updated

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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 (parthenogenesis) so populations of aphids on the spring growth can enlarge rapidly. In the late summer and fall, winged (alates) aphids will appear. The winged adults and their nymphs populations are significantly higher on yellow leaves than on green leaves at this time.

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:

 

Blackman, R. and J Holopainen. A year in the life of a birch aphid. <accessed 24 Mar 2016>

Blackman, R.L. & Eastop, V.F. Aphids on Worlds Plants website: Betula-A detailed key of aphids listed on birch species.<accessed 24 Mar 2016>

Holopainen, Jarmo K., Gürkan Semiz, and James D. Blande. “Life-History Strategies Affect Aphid Preference for Yellowing Leaves.” Biology Letters 5.5 (2009): 603–605. PMC. Web. 24 Mar. 2016.

Holstein, E. and M. Shultz. 2011. Birch Aphid: Insects and Diseases of Alaskan Forests. USDA-Forest Service. R10-TP-87 Revised April 2011. <accessed 24 Mar 2016>

Aphids on birches (Betula)

 

 

Orginal publication 5/6/11
Lastest revision <24 March 2016>

Author: R.L. Rosetta, Extension Nursery Integrated Pest Management, Department of Horticulture, Oregon State University/NWREC.


Gallery
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 3/24/16

 

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