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Peridemium harknessii on jack pine at base causing death of planted tree at 12 years.
Peridemium harknessii on jack pine at base causing death of planted tree at 12 years. Abitibi-Paper, Spruce River Road
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Peridermium harknessii gall on lodgepole pine.
Peridermium harknessii gall on lodgepole pine. Northwestern Pulp & Power, Hinton
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Peridermium harknessii galls on jack pine.
Peridermium harknessii galls on jack pine. Sapawe
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Peridermium harknessii galls on jack pine.
Peridermium harknessii galls on jack pine. Sapawe
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Peridermium harknessii on jack pine.
Peridermium harknessii on jack pine. N.B. repeated branching. Sapawe
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Pest (budworm) damage on tree needles
Budworm damage on red spruce. Black Brook, J.D.Irving.
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Pest damage in trees
Balsam woolly aphid damage on A. grandis. N.B adjacent hemlock. Shawinigan Division, Macmillan Bloedel.
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Pest damage on red spruce needles
Budworm damage on red spruce. Black Brook, J.D.Irving
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Pest worm eating tree needles
Budworms eating on tips of white spruce. Black Brook, J.D.Irving.
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Petawawa - PNre - normal and fastigiate form (grafts)
Petawawa - PNre - normal and fastigiate form (grafts)
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