Forest Investment Account

Abstract of FII Project R02-30

" ALT="See below to download" WIDTH="100" HEIGHT="129" BORDER="0" bordercolor="#000000">

Conifer Defoliating Insects of BC

Author(s): Duncan, Robert (Canadian Forest Service)
Subject: Entomology, Forestry
Series: Forest Investment Account (FIA) - Forest Science Program


Defoliating insects are a highly visible and important element of biodiversity in forest ecosystems and as such play a significant role in forest dynamics and stand ecology.
Defoliating insects also cause great economic losses (tree mortality, growth loss) to the forest resource. Yet at this time forest practitioners lack the necessary tools to accurately identify this important group of forest insects. This in turn negatively impacts the ability of forest practitioners to make informed resource management decisions in matters related to this important group of forest insects.
Field work in the second year of this project was conducted in the Vancouver, Kamloops, Cariboo, Prince George and Nelson forest regions. Forest types sampled included coastal Douglas-fir, coastal western hemlock, mountain hemlock, ponderosa pine-bunchgrass, interior Douglas-fir, interior western hemlock, Cariboo aspen-lodgepole pine-Douglas-fir and Engelmann spruce-subalpine fir. Field collections for 2002 began mid-May and continued until mid-September.
The projectís key interim result is an expanded ( by 100%) project web site which now features 80 defoliator species or approximately 60% of the defolator species known to occur in British Columbia. Other milestones achieved include collecting, rearing, identifying, photographing and researching and writing the supporting text (hosts, distribution, description, biology, habits, abundance and damage) for 40 additional defoliator species occurring in British Columbia.
This published web site now provides all forest stakeholders with an interest in forest health, ecology, conservation and biodiversity issues with an interim diagnostics tool and information source for about 60% of the defoliator species known to occur in British Columbia. Upon completion this work will be the first comprehensive identification guide (including all species) to the conifer feeding defoliators of British Columbia. It will provide end users with clear high quality photographic documentation of the larval stage of more than 140 species of conifer defoliators and a comprehensive synthesis of information on the hosts, distribution, biology, abundance, feeding habits and damage of the conifer feeding defoliators of British Columbia.

PDF Document

Download R02-30.pdf (55 Kb)

[Get Adobe Acrobat Reader] To view this document you need Adobe Acrobat Reader,
available free from the Adobe Web Site.

Updated August 26, 2005 

Search for other  FIA reports or other Ministry of Forests publications.

Please direct questions or comments regarding publications to