Forest Insect And Disease Conditions In Canada 1990

This bulletin describes pest conditions in Ontario forests in the summer of 1990. Conditions are divided into those created by insects, by tree diseases, and abiotic conditions. Data is given by region and district for the current and previous two years.

The Forest Insect and Disease Survey (FIDS) is a nation-wide network within Forestry Canada with the responsibility of producing an overview of forest pest conditions and their implications; maintaining records and surveys to support quarantine and facilitate predictions; supporting forestry research with records, insect collections and herbaria; providing advice on forest insect and disease conditions; developing and testing survey techniques; conducting related biological studies and analyzing this year's and previous year's data and producing various pest information maps using in-house Geographical Information System (GIS). This report outlines the status of forest pest conditions in the Vancouver Forest Region, and forecasts population trends of some potentially damaging pests. Pests are listed by host in order of importance.

In this report, pests considered to be currently most significantin terms of their present or potential economic or environmentalimpact are described in detail under "Major Forest Insects andDiseases." Regional surveys of pests are summarized under"Special Surveys." The status of many other pests is presentedin tabular form by region under the title "Other Insects andDiseases." A section on the Acid Rain National Early WarningSystem is included.

Forest pest conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories during 1990 are summarized and some predictions of infestation status are given for 1991. Twelve major pests are discussed, and additional noteworthy insects, diseases, and tree damage agents are reported in a table. An updating of surveys for acid rain symptoms in permanently established ARNEWS (Acid Rain National Early Warning System) plots and pest damage incidence in young coniferous stands are also reported.