. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. 252 COTTON COTTON part their lodjjing places and food supplies, thorousrh dusting with Paris arreen will control A thorough dusting with Paris green will control the webworras and cotton-square borers. Plant-lice are destroyed by plowing under their host plants in lat^ fall or winter. When it becomes necessary to take some other course, spraying with whale- oil soap, kerosene e
. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. 252 COTTON COTTON part their lodjjing places and food supplies, thorousrh dusting with Paris arreen will control A thorough dusting with Paris green will control the webworras and cotton-square borers. Plant-lice are destroyed by plowing under their host plants in lat^ fall or winter. When it becomes necessary to take some other course, spraying with whale- oil soap, kerosene emulsion or tobacco solution is etfective. Cutworms are controlled by placing about the fields bunches of grass or weeds im- mersed in Paris green. The better method, how-. Fig. 361. Mexican cottonboU- weevil. Enlarged. Fig. 362. Larva of Mexican cotton- boll-weevil. More enlarged. ever, is to kill them by thorough winter cultiva- tion, and keeping down all vegetation in the early spring. The cotton-worm (Aletia argillacea), bollworm {Heliothis armiger) and Mexican cottonboll-weevil {Anthonomus grandis) are not so easily controlled, and their ravages have been costly. The cotton- worm is now more easily controlled than formerly. It is a blue-green caterpillar, with black spots and stripes on its back. It is most severe in late sum- mer, but is the entire summer. There are several generations each year. The common method of combating it is to apply dry Paris green to the plants. The cottonboll-worm is a common garden pest, attacking various crops, as corn, tomatoes, peas and squash. The caterpillar is somewhat darker than the cotton-worm, but otherwise the two are very similar in their early stages. This, too, has several generations in a season. It is most effec- tively controlled by the planting of an early trap- crop. Sweet corn is much used. As soon as the corn is infested it is removed and destroyed or fed to stock. Lantern traps for the moths and ansenical sprays f
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