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Fallen tree
Windthrown large hard maple on deep till. N.B. Compactness of root system and lack of deep-going large roots. cf. pine, oak, etc
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Chlorosis in tree shoots
Chlorosis of shoots at time of new shoot elongation. Plonski Forest natural stand
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Sweetfern blister rust
Sweetfern blister rust (C. comptoneae) on five year old natural jack pine. N.B. Swelling and aeciospores on stem above root collar. Englehart Management Unit.
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Evidence of tree disease
Aeciospores and canker in 50 yr-old natural jack pine. Englehart Management Unit
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Evidence of tree disease (photo 2)
Aeciospores and canker in 50 yr-old natural jack pine. Englehart Management Unit
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Disease in tree seedlings
Aeciospores in lodgepole pine 2+1 transplants at Swastika Nursery, Englehart Management Unit. N.B. seedlings were infected in seed beds
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Cronartium canker in lodgepole pine
Cronartium canker in lodgepole pine raised as 2+0 seedlings at the Swastika Nursery and outplanted 1970. Photo after one year in field. Englehart Management Unit
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Cronartium canker in lodgepole pine (photo 2)
Cronartium canker in lodgepole pine raised as 2+0 seedlings at the Swastika Nursery and outplanted 1970. Photo after one year in field. Englehart Management Unit
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Cronartium canker in lodgepole pine (photo 3)
Cronartium canker in lodgepole pine raised as 2+0 seedlings at the Swastika Nursery and outplanted 1970. Photo after one year in field. Englehart Management Unit
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Leaning trees ("gear stick" trees)
Leaning trees ("gear stick" trees). Bareroot jack pine planted with sandvik hoes in 1964. Photo 1971. Asymmetric roots make the tree unstable, especially when crowns are heavy with wet snow. Davidson
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