Contents: By Damage and Image
In progress
Contents: Alphabetical
alder flea beetle
aphid management updated
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
borers
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
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
updated
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
Japanese beetle new
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
Myzocallis sp. on red oak new
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
roseslug
rove beetle gallery new
sawflies updated
scale
sequoia pitch moth
soldier beetle galleryn 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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Aphids

Pest description and crop damage 
Several species of aphid can become problems in nursery production. Read more . . .

Biology and life history 
Most species of aphid have similar life cycles. Read more . . .

Individual aphid webpages are listed below by host. Scroll over image for damage. Click to go to web link.

dwarf 'Alberta' spruce - Mindarus sp. alder - woolly alder aphid
Mindarus obliquus on dwarf 'Alberta' spruce woolly alder aphid
ash - woolly ash aphid bamboo - black-spotted bamboo aphid
woolly ash aphid black-spotted bamboo aphid
beech - woolly beech aphid birch - birch aphid
woolly beech aphid birch aphid
blue spruce - Cinara aphid cabbage - cabbage aphid
Cinara aphid on blue spruce cabbage aphid
cherry - black cherry aphid  
black cherry aphid  
Oak, red oak - Myzocallis sp.  
Myzocallis sp. on red oak  
nasturtium - black bean aphid
black bean aphid  
   
   
   
   
   

There are several very nice sites for general aphid information.

Pest description and crop damage 
Several species of aphid can become problems on broad-leaved trees and shrubs. Their color and size vary with species. All are soft-bodied insects with piercing–sucking mouthparts. They tend to feed in colonies. Aphids feed primarily on succulent tissues. Feeding damage to the plant can be minor to severe. Leaf and shoot distortion can occur if populations are high. Aphids also produce honeydew, a sweet, sticky secretion that collects on plant tissues and encourages growth of black sooty mold. Honeydew is also a nuisance when it falls on decks, cars, or other landscape surfaces and attracts ants, wasps, and bees that feed on this sweet liquid. Some aphids are also vectors of plant diseases, particularly viruses.


Biology and life history 
Most species of aphid have similar life cycles. Aphid females can give birth to live offspring most of the year without mating. Some species of aphid have only one host but commonly aphid species alternate with an overwintering or primary woody host plant then alternate with seasonal host(s).

Aphids usually are found in colonies on new growth, the underside of leaves, and near flower and fruit clusters. Some species have a root aphid stage. In summer and fall, aphid may produce winged females and, later, winged males. They mate and produce eggs for overwintering, especially in colder climates. Otherwise, adult aphid overwinter on crops, weeds, or trees. There may be as few as two generations or as many as 16 generations each year, depending on the species

 

General info:
Gordon's aphid website
UC Management Guidelines for Aphids

Aphid taxonomy
USDA's Aphidoidea Website

Aphid Identification:

Influential Points.com Aphid Identification
NC State's Key to common greenhouse aphids

Aphid Management or IPM:

Flint, M. 2013. UCIPM Online. Aphids. University of California
ATTRA's Sustainable aphid control for greenhouses

Heteroecious aphids:
Melon or cotton aphid:
NC State's website

Green peach aphid:
University of Florida's Website
NC State's website

Aphids by Hosts:

Conifers:
OSU Extension: Aphid and Adelgid Pests of Conifers

Balsam Fir:
Balsam Twig aphid, Mindarus abietinus
Balsam woolly adelgid, Adelges piceae

Grand Fir:
Balsam Twig aphid, Mindarus abietinus

Douglas fir (Psuedotsuga):
Cinara aphids
Ohio State Fact Sheet: Cinara conifer aphids
Cooly spruce gall adelgid, Adelges cooleyi

Pine:
Ohio State Fact Sheet: Cinara conifer aphids
Pine bark adelgid, Pinus strobi
Pine leaf adelgid
White pine aphid

Spruce:
Cinara aphids
Ohio State Fact Sheet: Cinara conifer aphids
Spruce gall adelgids
Spruce aphid, Elatobium abietinum
WSU Agricultural Chemical & Environmental News: Sprucing up your IPM Skills: Plan now to attack spruce aphids next year.

 

Deciduous Trees and Shrubs:

Beech, Fagus:
Woolly beech aphid

Birch, Betula:
PNW Nursery IPM: Birch Aphid

Maples:
Woolly alder aphid
Periphyllus or maple aphid

Perennials:
Chysanthemums
more mums
Foxglove aphid


Orginal publication 14 July 2015
Lastest update <24 February 2017>

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



Website editor:
Robin Rosetta

Page last modified 2/24/17

 

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