Effects of Dipel wettable powder for foliage protection against western spruce budworm 1 and 2 years following aerial application
By: by Wayne Bousfield and Tom Flavell.
Contributors: Flavell, Thomas H.; United States. Forest Service. Northern Region. State & Private Forestry.
Series: Forest insect & disease management; Report -- 80-9.; Report (United States. Forest Service. Northern Region) -- no. 80-9.
Publisher: USDA Forest Service, Northern Region, State & Private Forestry
Published: 1980
Place of publication: Missoula, Mont
Language: eng
Subjects: Bacillus thuringiensis -- Montana -- Gallatin National Forest.; Western spruce budworm -- Control -- Montana -- Gallatin National Forest.
Description: "This evaluation showed that Bt provided measurable foliage protection 1 year after treatment, but no differences were evident after 2 years. We recommend future Bt tests include postspray population measurements in the pupal and/or adult, and/or egg stage, and that foliage protection be measured the following year. The effects of Bt on the population should not be evaluated in the same manner as fast-acting insecticides."--Conclusions.
Notes: Includes bibliographical references (p. 4).

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