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Forest Pests of North America
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Field Guide to Diseases and Insect Pests of Idaho and Montana Forests

Susan K. Hagle – Plant Pathologist,
Scott Tunnock – Entomologist (retired),
Kenneth E. Gibson – Entomologist, and
Carma J. Gilligan – Biological Technician.

U.S. Department of Agriculture, Forest Service, State and Private Forestry, Northern Region, P.O. Box 7669, Missoula, Montana 59807. 1987. Reprint 1990. Publication Number R1-89-54.

Contents

Abstract
 
Acknowledgements
 
Introduction
 
Deciding Where To Start In The Identification Keys
 
Key To The Common Diseases And Insect Pests Of Idaho And Montana Conifers
 
Key To Common Abiotic Damages
 
Descriptions
  Insects   Diseases
  Balsam Woolly Adelgid   Cedar Laminated Butt Rot
  Sequoia Pitch Moth   Cedar Brown Pocket Rot
  Spruce Beetle   Red Belt Fungus
  Red Turpentine Beetle   Brown Heartrot
  Western Pine Beetle   Indian Paint Fungus
  Mountain Pine Beetle   Pouch Fungus
  Douglas-Fir Beetle   Pini Rot
  Ambrosia Beetles   Atropellis Canker
  Wood Borers   White Pine Blister Rust
  Engraver Beetles   Western Gall Rust
  Fir Engraver   Comandra Blister Rust
  Western Balsam Bark Beetle   Stalactiform Blister Rust
  Aphids   Cytospora Canker
  Gouty Pitch Midge   Lachnellula Canker
  Terminal Weevils   Root Disease
  Western Pine Shoot Borer   Armillaria Root Rot
  Western Spruce Budworm   Laminated Root Rot
  Douglas-Fir Tussock Moth   Black Stain Root Disease
  Western False Hemlock Looper   Annosus Root Rot
  Western Hemlock Looper   Schweinitzii Root and Butt Rot
  Cooley Spruce Gall Adelgid   Elytroderma Needle Cast
  Douglas-Fir Needle Midges   Spruce and Fir Broom Rusts
  Larch Casebearer   Diplodia Blight
  Larch Sawfly   Snow Molds
  Larch Bud Moth   Rhabdocline Needle Cast
  Pine Needle Sheathminer   Swiss Needle Cast
  Pine Needle Scale   Fir Needle Cast, Blight, and Rusts
  Black Pineleaf Scale   Delphinella Shoot Blight
  Sugar Pine Tortrix   Larch Needle Blight
  Defoliating Weevils   Larch Needle Cast
  A Pine Looper   Pine Needle Casts
  Pine Sawfly   Other
  Pine Butterfly   Dwarf Mistletoe
  Cone "Worms"   Frost Injury
  Pine Cone Beetle   Winter Desiccation
  Western Conifer Seed Bug   Drought Injury
 
References
 
Glossary
 
Index To Pests By Tree Species And Part Of Tree Affected
 
Technical Assistance Sources
 
Specimen Collection And Shipping

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