An Assessment of Ground Deposits From Aerial Spray Operations in the Kamloops Forest Region of British ColumbiaMicroform - 1988
Over the past several years, the Kamloops forest region has faced a problem of Douglas fir needle defoliations by the western spruce budworm. A program of aerial spraying with a formulation of Bacillus thuringensis (B.t.) was begun in 1986. In 1987 the deposit from spraying was measured by 40 Kromekote cards and petri dishes for 5 different spray blocks providing analysis on cover density (number of drops per square centimeter) and deposit density (billion international units of B.t. per square meter). The results of the 1987 spray trials are compared with the 1986 results, with alternative sampling procedures recommended where necessary.
Publisher: Regina : Saskatchewan Research Council, 1988
Description: 37 p. : ill
Branch Call Number: MF BC-DOC 88-02198