Three years of aerial field experiments with Bacillus thuringiensis plus chitinase formulation against the spruce budworm |
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Authors: | WA Smirnoff |
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Institution: | Laurentian Forest Research Centre, Canadian Forestry Service, Department of the Environment, P.O. Box 3800, Ste. Foy, Quebec G1V 4C7 Canada |
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Abstract: | From 1971 to 1973 several Bacillus thuringiensis formulations were tested in the field against larvae of the spruce budworm under various conditions of population and tree defoliation. The results showed B. thuringiensis treatments can be a weapon in the control of spruce budworm outbreaks and the beneficial effect of B. thuringiensis treatments appear to be prolonged over 1 or 2 years. A new compact formulation was developed making B. thuringiensis treatments more economical and competitive with chemical insecticides. |
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