Discovering and Exploring the Leaf-feeding Insects in Our Region

Pacific Northwest (PNW) Defoliators

What's Eating My Trees and Shrubs
Identify Defoliators on: Apple Trees

Species listed here are the most common defoliators of apple trees in the Puget Sound region. Species are listed from most widespread and abundant to least common and or of limited distribution (2007 data).

Type of Defoliation Species When Where Status
Leaf -rollers
Leaf roller damage
Leaf roller
Partial roll
Apple tortix Apple Tortix
Archips fuscocupreanus
May
Puget
Sound region
Exotic,
here
since
1990's
European leaf-roller European leafroller
Archips rosanus
April-
June
Wide-
spread
Exotic,
here
since
1960's
Oblique-banded leafroller Oblique-banded leafroller
Choristoneura rosaceana
April-
June
Wide-
spread
Native
Dark fruit tree tortrix Dark fruit tree tortrix
Pandemis heparana
April-
June

W. Wash
& BC
region

Exotic,
here
since
1970's
Barred fruit tree tortrix Barred fruit tree tortrix
Pandemis cerasana
April-
June

Puget
Sound
region
only

Exotic,
here
since
1970's
Green budworm Green budworm
Hedya nubiferana
April-
June
Wide-
spread
Exotic,
here
since
1970's
Carnation tortrix Carnation tortrix
Cacoecimorpha pronubana
April-
June

Oregon
to BC

Exotic,
here
since
1970's
Apricot moth Apricot moth
Ditula angustiorana
April-
June
Wide-
spread
west of
cascades
Exotic
Fruit tree tortrix moth European fruit tree tortrix moth
Archips podana
April-
June
Whatcom
Co. & BC
Exotic

Tent makers
tent makers
Tent damage_Fall webworm
Photo by Robin Rosetta
Species When Where Status
Tent caterpillar Tent caterpillar
Malacosoma constrictum
April-
June
Wide
spread
Native
Fall webworm Fall webworm
Hyphantria cunea
July-
Sept or
Oct.
Wide
spread
Native
Apple ermine moth Apple ermine moth
Yponomeuta malinellus
April-
June
Wide
spread
Exotic
Cherry ermine moth Cherry ermine moth
Yponomeuta padellus
April-
June
Willamette
Valley
north to
W. BC
Exotic
 

Shot-holers
Shot hole damage
Winter moth damage on alder
Species When Where Status
Winter moth Winter moth
Geometridae
April-
June
Willamette
Valley
north to
W. BC &
E. Coast
Exotic
Green pugmoth Green pugmoth
Chloroclystis rectangulata
April-
June
Less
common
NW &
E. Coast
Exotic
 

Tip Wadders
wadder
Species When Where Status
Lesser budmoth larva Lesser budmoth
Recurvaria nanella
April-
June
Wide
spread
Exotic
Eye spotted bud moth larva Eye-spotted bud moth
Spilonota ocellana
April-
June
Wide
spread
Exotic
 

Skeletonizers
Skeletonize
Species When Where Status
Apple thorn skeletonizer Apple-and-thorn skeletonizer
Choreutis pariana
April-
June
Wide
spread
Native
Apple skeletonizer Apple skeletonizer
Swammerdamia pyrella
April-
June
W. Wash.
Rare
Exotic
 

Folders
folder
Species When Where Status
'Golden' leaf roller Golden leafroller
Acleris holmiana
April-
June
Puget
Sound
region
Exotic
 

 

Gallers
Leaf gall damage
Species When Where Status
Apple midge larva Apple leafcurling midge
Dasineura mali
April-
June
Whatcom
County
Exotic
 
Department or office , PO Box 640000, Washington State University, Pullman WA 99164-0000, 509-335-0000, Contact Us