Canadian Forest Service Publications

Evaluation des fongicides utilisés pour le contrôle du Gremmeniella abietina. II Résultats des essais effectués sur le terrain en 1975, 1976 et 1977. (Evaluation of fungicides for control of Gremmeniella abietina. II Results of 1975, 1976 and 1977 field assays). 1979. Smerlis, E. s.n., S.l. Rapport d'information LAU-X-38. 44 p.

Year: 1979

Issued by: Laurentian Forestry Centre

Catalog ID: 16246

Language: French / English

Series: Information Report (LFC - Québec)

Availability: PDF (download)

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The North American strain of Gremmeniella abietina occurring on pines in Quebec can be controlled with contact fungicides. Daconil 2787 Wettable Powder, when applied as a 1,3% suspension twice at two-week interval at the rate of 100 mL/m2 , protected nursery-size stock of jack pine and red pine. The first application should be carried out early in the spring when the current-year leaders of jack pine and red pine are approximately 10 and 5 cm long, respectively. Phaltan was less effective than Daconil 2787 Wettable Powder. Phygon-XL, although effective, was phytotoxic at the required concentrations and application frequencies. Dyrene and Bravo 6F were promising but an additional year of assays is required to establish the proper dosages and application schedules. The Quebec strain of G. abietina on spruces was controlled in 1977 by a single application of certain concentrations of either Daconil 2787 Wettable Powder or Bravo 6F. Additional information, however, is required for the correct evaluation of their effectiveness.