. Circular. Insect pests; Insect pests. Fig. 6.—a. Cross section of norniiil cotton loaf ; b, cross section of cotton loaf injured by the red spider. The puncture is near lower right-hand comer. Ilishly magnified. (Author's illustration.) distorted, and drop. Figure 5 shows an uninfested cotton plant for comparison with figure 7, infested. The lower leaves usually are first attacked, but infestation spreads upward until often only the bare stalk and one or two terminal leaves remain. (See fig. 8.) Such plants almost invariablv die. The injury to the leaf and the dis- coloration which follows t
. Circular. Insect pests; Insect pests. Fig. 6.—a. Cross section of norniiil cotton loaf ; b, cross section of cotton loaf injured by the red spider. The puncture is near lower right-hand comer. Ilishly magnified. (Author's illustration.) distorted, and drop. Figure 5 shows an uninfested cotton plant for comparison with figure 7, infested. The lower leaves usually are first attacked, but infestation spreads upward until often only the bare stalk and one or two terminal leaves remain. (See fig. 8.) Such plants almost invariablv die. The injury to the leaf and the dis- coloration which follows the feeding of the mites are easily under- stood by referring to figure 6, which represents ,(«) the appearance of healthy cotton leaf-tissues and (h) the condition of the tissue after feeding by the pest. As previously intimated, the worst spots of infestation are either to be found in close jiroximity to yards Avith borders of violets or to a clump of pokeweed stalks. Large fields are prol)ably never completely damaged, but smaller fields frec^uently become wholly affected. A thorough examination of all Hehls within 1 mile of the center of Leesville. S. C\. was made with a view of deter- mining the exact status of red-spider infestation at one sjiecific. 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 United States. Bureau of Entomology. Washington, D. C. : The Bureau
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
