. Field crops for the cotton-belt. Agriculture. CHAPTER 1^ SOME IMPORTANT INSECT ENEMIES OF COTTON The three most destructive insect enemies of cotton, considering the entire cotton-belt, are the Mexican cotton boll-weevO, the cotton boll-worm, and the cotton leaf- worm. Other insect enemies of secondary importance that do considerable damage to the cotton crop, ai;e the cotton leaf-louse, the cotton red-spider, the cowpea pod- weevil, and cutworms. ' THE MEXICAN COTTON BOLL-WEEVlL (AnthonomUS grundis (Fig. 18.) It is thought that the cotton boll-weevil is native to Mexico or Central America,
. Field crops for the cotton-belt. Agriculture. CHAPTER 1^ SOME IMPORTANT INSECT ENEMIES OF COTTON The three most destructive insect enemies of cotton, considering the entire cotton-belt, are the Mexican cotton boll-weevO, the cotton boll-worm, and the cotton leaf- worm. Other insect enemies of secondary importance that do considerable damage to the cotton crop, ai;e the cotton leaf-louse, the cotton red-spider, the cowpea pod- weevil, and cutworms. ' THE MEXICAN COTTON BOLL-WEEVlL (AnthonomUS grundis (Fig. 18.) It is thought that the cotton boll-weevil is native to Mexico or Central America, all evidence pointing to the fact that since prehistoric times it has thrived upon the peren- nial tree cottons of those re- gions. Its history in the cotton- belt of the United States begins in 1892, at which time it crossed, the Rio Grande iato Texas in the vicinity of Brownsville. In 1894 this pest damaged the cot- ton crop rather severely in half a dozen counties in south- east Texas and during the ten years following it spread over the greater portion of the state. The boU-weevil 127. FiQ. 18. — Adult boll-weevil showing characteristic teeth on front legs ^hioh serve to distinguish this insect from other 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 Morgan, James Oscar. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
