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EFFECTS OF NUCLEAR POLYHEDROSIS VIRUS AND BACILLUS THURINGIENSIS ON WESTERN SPRUCE BUDWORM (LEPIDOPTERA: TORTRICIDAE) 1 AND 2 YEARS AFTER AERIAL APPLICATION1

Published online by Cambridge University Press:  31 May 2012

R. F. Shepherd ,
T. G. Gray  and
J. C. Cunningham
R. F. Shepherd
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia V8Z 1M5
T. G. Gray
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia V8Z 1M5
J. C. Cunningham
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
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Extract

An understanding of all environmental effects resulting from control actions is important in the selection of a method of managing insect populations. Effects may extend beyond the year of treatment and can modify management decisions. In 1978, a nuclear polyhedrosis virus (NPV) and Bacillus thuringiensis Berliner (B.t.) were tested as aerial spray applications against the western spruce budworm, Choristoneura occidentalis Freeman, on Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, near Cache Creek, British Columbia. The impact on population densities and on the incidence of NPV was measured in the treated and non-treated areas for 2 vears following the year of application, and is reported here.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 3 , March 1982 , pp. 281 - 282
Copyright
Copyright © Entomological Society of Canada 1982

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References

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