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"Scleroderris fuliginosa. a, immature ascocarps ... S. fuliginosa is said to be parasitic on twigs and branches of willows in Europe and North America." -Whitney, 1911

Willow Canker

"Scleroderris fuliginosa. a, immature ascocarps ... S. fuliginosa is said to be parasitic on twigs and…

"Scleroderris fuliginosa. b, ascus containing spores and accompanied by paraphyses ... S. fuliginosa is said to be parasitic on twigs and branches of willows in Europe and North America." -Whitney, 1911

Willow Canker

"Scleroderris fuliginosa. b, ascus containing spores and accompanied by paraphyses ... S. fuliginosa…

Illustrated are the successive stages in the ravages of the chestnut blight. The images are chronological, the top is from 1909, the middle is from 1910, and the bottom is from 1911.

Chestnut Blight Stages

Illustrated are the successive stages in the ravages of the chestnut blight. The images are chronological,…

Illustrated is the distribution of the chestnut blight from February 1, 1912.

Distribution of Chestnut Blight

Illustrated is the distribution of the chestnut blight from February 1, 1912.

Illustrated is currant foliage attacked by the leaf-spot fungus.

Currant Foliage

Illustrated is currant foliage attacked by the leaf-spot fungus.

Illustrated is the early blight of a potato plant. It is a type of lesion causing more or less sudden death of the leaves, stems, shoots, or blossoms.

Early Blight of Potato

Illustrated is the early blight of a potato plant. It is a type of lesion causing more or less sudden…

Illustrated is "tip growth" of yellows. It is the yellowing of foliage caused by physiological diseases.

Tip Growth of Yellow

Illustrated is "tip growth" of yellows. It is the yellowing of foliage caused by physiological diseases.