Canadian Forest Service Publications

Evaluation of fungicides for control of Gremmeniella abietina. I : laboratory and preliminary field assays. 1976. Smerlis, E. s.n., S.l. Rapport d'information LAU-X-23. 34 p.

Year: 1976

Issued by: Laurentian Forestry Centre

Catalog ID: 16401

Language: English

Series: Information Report (LFC - Qu├ębec)

Availability: PDF (download)

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Abstract

The effect of 20 fungicides on Gremmeniella abietina (Lgbg.) Morelet was investigated in the laboratory and field. A strain from jack pine was generally less sensitive in laboratory to fungicides than a strain from black spruce. In the field, Phygon 50-W was the most effective fungicide on jack pine and red pine against the former strain. It suppressed infection completely after one to three applications of 20,000 or 40,000 ppm suspensions. Partial protection of jack pine was provided by C-O-CS, Cyprex 65-W. Difolatan 4.8 flowable suspension, Dithane M-22, Dithane M-45, Dithane Z-78, microfine sulfur, and Phaltan. The latter was similarly effective also on red pine. Two applications of stove oil completely inhibited ascospore discharge in the field from apothecia occurring on jack pine. On black spruce, three applications of 20,000 or 40,000 ppm suspensions of C-O-CS, Dithane M-22, or Z-C Spray resulted in partial control of the strain from black spruce.

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