. Southern field crops (exclusive of forage plants). Agriculture. COTTON DISEASES 415 all other plants having tender succulent roots. Mean- time the land may be cropped with any of the grains, with any of the forage grasses, or with peanuts, or with velvet beans, or with the Iron variety of cow- peas, which are all practically exempt from attack. The root-knot en- largements may be dis- tinguished from the beneficial tubercles oc- curring on the roots of cowpeas and other leg- umes as follows: — When small, root- knot swellings are gen- erally longer than thick, and the swelUng is on all sides
. Southern field crops (exclusive of forage plants). Agriculture. COTTON DISEASES 415 all other plants having tender succulent roots. Mean- time the land may be cropped with any of the grains, with any of the forage grasses, or with peanuts, or with velvet beans, or with the Iron variety of cow- peas, which are all practically exempt from attack. The root-knot en- largements may be dis- tinguished from the beneficial tubercles oc- curring on the roots of cowpeas and other leg- umes as follows: — When small, root- knot swellings are gen- erally longer than thick, and the swelUng is on all sides of the root; while tubercles are always formed on one side of the root. 386. Boll-rot or anthracnose {Colletotrichum gossypii). — This fungus is responsible for the greater part of the rot- ting of the bolls of cotton. In its worst form, which occurs during damp weather, small discolored depressions appear on the bolls; these spots become grayish and in time be- come covered with pinkish spores, which in effect are the seedlike parts of the fungus (Fig. 183). Either a single lock or the entire contents of the boll may be rotted. Or the disease may keep the boll from opening Fig. 182. — Root-knot or Nematode Injubies on Cotton 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 Duggar, J. F. (John Frederick), 1868-. New York, The Macmillan company
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Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
