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. : Fo64-37/144-1977E-PDF
"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.
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| Ministère/Organisme | Chemical Control Research Institute (Canada), issuing body. |
|---|---|
| Titre | 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. |
| Titre de la série | Information report, 0704-7711 ; CC-X-144 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | 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). Includes abstracts in English and French. |
| Information sur la publication | Ottawa, Ontario : Chemical Control Research Institute, May 1977. |
| Auteur / Contributeur | Morris, O. N. (Oswald Nathaniel), 1926- author. |
| Description | 1 online resource (i, 23 pages, 15 unnumbered pages) : illustrations. |
| Numéro de catalogue |
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| Descripteurs | 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. |