00000nam 2200000zi 4500 9.935619 CaOODSP 20240319151411 m o d f cr mn||||||||| 240319e197705 onca ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-on x7x7 Fo64-37/144-1977E-PDF Morris, O. N. (Oswald Nathaniel), 1926- author. Aerial field trials with a new formulation of Bacillus thuringiensis acainst the spruce budworm, Choristoneura fumiferana (Clem.) / by O.N. Morris, J.A. Armstrong and M.J. Hildebrand. Ottawa, Ontario : Chemical Control Research Institute, May 1977. 1 online resource (i, 23 pages, 15 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Information report, 0704-7711 ; CC-X-144 ISSN of series supplied from ISSN Portal. "May, 1976." "May 1977"--Cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 7). "Mixtures of Dipel 36B, a highly concentrated commercial formulation of Bacillus thuringiensis (B.t.) and acephate (Orthene®) (O,S-dimethylphosphoramidothioate), an organophosphate insecticide, were applied by aircraft onto 20 to 30-hectare blocks of white spruce Picea glauca (Moench) and balsam fir (Abies balsamea (L.)) trees infested with spruce budworm, Choristoneura fumiferana (Clem). The formulation contained carboxymethylcellulose (CMC), polyvinylpyrrolidone (PVP) and a sunlight screen, Uvinul DS49. Dosage rate applied was 30 Billion International Units of B.t. with and without 42 g AI of acephate in 9.4 ℓ/hectare. Drop density was generally high with one plot receiving 88 drops/cm² at ground level. In spite of this, efficacy of the treatments in terms of population reduction and foliage protection was low, due most likely to the presence of PVP in the fonmlation and to tin-usually high natural budworm mortality. The treatments had no immediate deleterious effect on the spruce budworm parasite complex"--Abstract, page i. Includes abstracts in English and French. Bacillus thuringiensis Ontario Testing. Acephate Ontario Testing. Spruce budworm Biological control Ontario. Spruce budworm Control Ontario. Aerial spraying and dusting in forestry Ontario. Bacillus thuringiensis Ontario Essais. Acéphate Ontario Essais. Tordeuse des bourgeons de l'épinette Lutte biologique contre Ontario. Tordeuse des bourgeons de l'épinette Lutte contre Ontario. Pulvérisation et poudrage aériens en sylviculture Ontario. Chemical Control Research Institute (Canada), issuing body. Report (Chemical Control Research Institute (Canada)) CC-X-144. (CaOODSP)9.931023 PDF 2.54 MB https://publications.gc.ca/collections/collection_2024/eccc/fo64/Fo64-37-144-1977-eng.pdf