. Southern field crops (exclusive of forage plants). Agriculture. COTTON INSECTS 391. "injury done to cotton, prevention or poisoning is seldom attempted. Experiments have shown that dusting the plants with a Ught appUcation of Paris green or other preparation of arsenic destroys many of the tiny worms on the day, on which they are hatched and before they are large enough to enter the boll. For poisoning to be most effective, it should begin about the time that adjacent corn ears begin to harden, and it niay need to be repeated several times. The poison adheres better if applied while the
. Southern field crops (exclusive of forage plants). Agriculture. COTTON INSECTS 391. "injury done to cotton, prevention or poisoning is seldom attempted. Experiments have shown that dusting the plants with a Ught appUcation of Paris green or other preparation of arsenic destroys many of the tiny worms on the day, on which they are hatched and before they are large enough to enter the boll. For poisoning to be most effective, it should begin about the time that adjacent corn ears begin to harden, and it niay need to be repeated several times. The poison adheres better if applied while the dew is on the plants. The most generally practi- cable method of reducing the injury to cotton consists in using corn as a trap crop. Strips of corn should be planted about the first of June, or at such times as to bring the corn into the roasting-ear condition about the first of August. Then the moths deposit their eggs on the corn rather than on the cotton plants. The trap crop of corn is still more effective if two plantings are made at intervals of a few weeks, so as to furnish a continual supply of roasting ears during the time when moths are most nmnerous. These strips of corn may be planted on oat patches adjacent to the cotton fields, or better, 2 to 4 rows of corn "may be planted in alternation with 20 to 40 rows of cotton. In order for the corn to serve as a trap crop, it must be planted late, and not at the time when the cotton is planted. Fig. 169. â Pupal or Chbysalis Stage of the Cotton Boli<- â BTORM OB COBN 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
