. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . th one hand. As aconsequence of the loss of roots and the general weak-ening of the plant, many stalks fail to set the ear, orform only a nubbin. The injured plant also maturesslowly, remaining green longer than the average, andbeing thus especially subject to injury by frost. Acloser examination ot the young plant will commonlyshow a perfo
. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . th one hand. As aconsequence of the loss of roots and the general weak-ening of the plant, many stalks fail to set the ear, orform only a nubbin. The injured plant also maturesslowly, remaining green longer than the average, andbeing thus especially subject to injury by frost. Acloser examination ot the young plant will commonlyshow a perforation of the underground part of thestem either at or near the upper circle of the , as the plant increases in size, the roots them-selves are seen to be gnawed irregularly, great holes or CORN PESTS AND DISEASES 26l notches being eaten out, first in one direction and thenin another, until the roots are severed or the larger roots the larva may perhaps completelybury itself. In well-grown corn it very commonlybores into the stalk beneath the upper circle of braceroots, or behind the sheath of the lower leaf, in whichhabit it differs from the northern corn root worm. Itis a soft, slender-bodied, worm-like insect, a little over. Fig 67—Beetle of Southern Corn Root Worm Enlarged five and two-thirds diameters (after Forbes) an inch long when full grown, and nearly ten times aslong as thick. The fact that its injuries to corn occur withoutapparent reference to the crop of the previous yearmakes it unlikely that the favorite method of rotationwill serve for the protection of corn against this corn seems to be much more liable to injurythan the field varieties, from which fact we may sur-mise that the time of planting has something to do with 262 THE BOOK. OF CORN the intensity of the attack. 1 ne vicinity of cucumoers,squashes, and other of the commoner food plants of thebeetle may account for this seeming preference. Northern Corn Root Worm—
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