Canadian Forest Service Publications

Évaluation des fongicides utilisés pour le contrôle du Gremmeniella abietina. III. Résultats des essais effectués sur le terrain en 1978. (Evaluation of fungicides for control of Gremmeniella abietina. III. Results of 1978 assays). 1980. Smerlis, E. Environnement Canada, Service canadien des forêts, Centre de recherches forestières des Laurentides, Sainte-Foy (Québec). Rapport d'information LAU-X-46. 24 p.

Year: 1980

Issued by: Laurentian Forestry Centre

Catalog ID: 14554

Language: French / English

Series: Information Report (LFC - Québec)

Availability: PDF (download)

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The North American strain of G. abietina occuring on pines can be controlled on jack and red pine seedlings with two applications at a two-week interval of 2% (20 g/L) water suspensions either of Bravo 6F or Dyrene at the rate of 100 mL per m2. The first treatment should be carried out when the current-year leaders of jack pine and red pine are 10 and 5 cm long, respectively. The Quebec strain of G. abietina found on spruces can be controlled on seedlings with a single application either of 2% (20 g/L) water suspension of Bravo 6F or 3% (30 g/L) Daconil 2787 Wettable Powder in mid-July at the rate of 100 mL per m2. Several other fungicides were effective against the two strains of G. abietina. They require, however, additional tests to establish the proper dosages and application frequencies.