. Chestnut blight. Chestnut blight; Chestnut. Fig. 19. The trunk of an infected nursery tree, shown natural size. W, B and C are views from diff'erent directions. The point of infection in each view is shown at a, the area killed by the fungus last year at /', and the development early in May of this year at c. Three days after this figure was drawn the girdling was complete. savage hordes of small boys in autumn. Even the ubiquitous squirrel may spread the disease with tooth and claw while cutting off ripe burs and racing up and down the trunks ; while every bird and insect that rests upon an
. Chestnut blight. Chestnut blight; Chestnut. Fig. 19. The trunk of an infected nursery tree, shown natural size. W, B and C are views from diff'erent directions. The point of infection in each view is shown at a, the area killed by the fungus last year at /', and the development early in May of this year at c. Three days after this figure was drawn the girdling was complete. savage hordes of small boys in autumn. Even the ubiquitous squirrel may spread the disease with tooth and claw while cutting off ripe burs and racing up and down the trunks ; while every bird and insect that rests upon an infected spot is liable to carry the spores upon its feet or body to other trees. Mice, voles and rabbits often make wounds about the base of a tree and carry the spores in their fur. All during the growing season spores are being developed in countless numbers, and these are liable to fall into even the slightest abrasions of the bark and germinate. The treatment of a disease of this nature must, of course, be almost entirely preventive. When once allowed to enter, it cannot be reached by poisons applied externally, nor can the spores, which issue continuously and abundantly through erup-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original 1906-1960
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Keywords: ., bookcollectionbiodiversity, bookleafn, booksubjectchestnutblight
