. Chestnut blight. Chestnut blight; Chestnut. 6 FARMERS' BULLETIN 2 068 vigorously growing trees are easily recognized by their yellowish- brown to orange surface color, which contrasts sharply with the grayish-green color of normal bark (fig. 7). The cankered area may be sunken below the surrounding healthy bark, raised above it, or partly sunken and partly raised (fig. 8). After the fungus kills smooth bark through to the sap- wood, a sunken canker is formed when the dead bark dries and be- comes thinner than the living liark. Friuting bodies of the fungus soon appear on the dead bark. Some-
. Chestnut blight. Chestnut blight; Chestnut. 6 FARMERS' BULLETIN 2 068 vigorously growing trees are easily recognized by their yellowish- brown to orange surface color, which contrasts sharply with the grayish-green color of normal bark (fig. 7). The cankered area may be sunken below the surrounding healthy bark, raised above it, or partly sunken and partly raised (fig. 8). After the fungus kills smooth bark through to the sap- wood, a sunken canker is formed when the dead bark dries and be- comes thinner than the living liark. Friuting bodies of the fungus soon appear on the dead bark. Some- times the infected bark of vigorous trees is not killed outright and new bark tissues grow, forming a swol- len canker (fig. 8). Fruiting bod- ies of the fungus seldom appear on swollen cankers. On thick-barked limbs and trunks a young blight infection causes very little change in the outward appear- ance of the bark. As the disease progresses, abnormal splits or cracks often appear in the thick bark, exposing some of the buS- colored infected inner bark, and fruiting bodies develop in bark splits or Fi(!iiiiE n.—SiKiix' iKirus (if llic cliestiml liliuht fungus. (About Ci linu's natural size.). 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: ., bookcolle, bookcollectionbiodiversity, booksubjectchestnutblight
