Insects & Diseases

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American Hornet Moth

Host Plants: Poplar, aspen, willow

 

   

Aphids

Host Plants: Several deciduous trees and shrubs.

 

   

Blotch Leafminer

Host Plants: Aspen

 

   

Bronze Birch Borer

Host Plants: Birch-Jacquemonti and European White are particularly susceptible. River Birch is more resistant.

 

   

Cooley Spruce Gall Adelgid

Host Plants: Spruce and Douglas-fir

 

   

Elm Leaf Beetle

Host Plants: Siberian Elm-also Rock, English and American Elms

 

       

Fall Webworm

Host Plants: Several deciduous trees and shrubs

 

   

Leafcutter Bee

Host Plants: Rose, Serviceberry, others

 

   

Leafrollers

Host Plants: Apple, crabapples, Plums, several deciduous trees and shrubs, many hosts.

 

   

Mountain Pine Beetle

Host Plants: Ponderosa, Lodgepole, Limber, Scotch

 

   

Oystershell Scale

Host Plants: Aspen, ash, cotoneaster, dogwood, maple, willow, lilac, among others

 

   

Pear Sawfly

Host Plants: Varieties of sweet and ornamental cherries, plums, hawthorn, pear, cotoneaster

 

   

Pine Needle Scale

Host Plants: Pines and spruce

 

   

Poplar Borer

Host Plants: Primarily aspen. Poplar and cottonwood also.

 

   

Poplar Twiggall Fly

Host Plants: Aspen and some poplar

 

   

Root Weevil (Black Vine & Strawberry)

Host Plants: Hemlock, yew, rhododendron, Lilac and others

 

   

Sequoia Pitch Moth

Host Plants: Pines

 

   

Spider Mites

Host Plants: Arborvitae, Dwarf Alberta Spruce, juniper, several perennials

   

Western Poplar Clearwing Borer

Host Plants: Poplar, aspen, willow, birch

 

   

Wooly Pine Adelgids

Host Plants: Pine