Evaluation of Fungicides to Control Botrytis Blight of Containerized Western Larch and Lodgepole Pine at the Coeur D'Alene Nursery, Idaho
Selected fungicides were evaluated to control Botrytis blight of containerized western larch and lodgepole pine seedlings at the Coeur d'Alene Nursery, Idaho. Fungicides were applied at biweekly intervals before and after seedling inoculation with Botrytis. Chipco 260l9®, Daconil 2787® and Bravo soO® provided the best level of disease control. Tersan 1991® was ineffective. Several fungicides, especially Bravo 500®, restricted height growth of tested seedlings. These tests indicated that several fungicides are available to effectively control this disease when used in conjunction with proper sanitation and cultural procedures.
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Author(s): USDA Forest Service