Cultivation, Enemies, etc.—Shallow culture, frequently repeated, is demanded by sweet corn. The growth at first is timid and slow; afterward, if well cultivated, the stalks grow with great rapidity and vigor.
New Early Evergreen Sweet Corn.
To make the most of the stalks, they should be cut as soon as possible after the last ears have gone to market and fed to stock. Sweet corn stalks when dry make excellent fodder.
The main enemies of corn are the cut worm, which is only troublesome in spring; a fungus which attacks the ears and which is always most prevalent on the small, early sorts; and a worm which cuts and injures the grain while the corn is in milk. Crows sometimes pull up the seeds, but can be disposed of by scattering a little yellow corn on the surface of the ground around the edges of the field. As the crow destroys many cut worms, it is better to feed him with corn than to shoot him.
The prevalence of fungus-troubled or smutty corn is probably a symptom of weakness, the result of planting too early, or of too much wet weather. All plants that are weak are liable to fungus attacks, and it is the early corn that suffers most. This corn is often planted before the ground is sufficiently warm, and there is a consequent weakness of growth. Indian corn, at Philadelphia, should not be planted before May 10th, and yet it is not uncommon to see gardeners planting sweet corn two weeks earlier. They say they are "going to risk it." The result may be a good crop of corn, or it may be a crop of worms and fungus. Of course, the high price of the first corn in market is the excuse for the unseasonable date of planting. But it is not quite fair to blame the seed or the variety of corn for what is partly the result of the gardener's impatience. All traces of smut on corn stalks should be burned, and not allowed to be fed to cattle.
The Corn Worm.—Far more destructive and disastrous than smut is the corn worm (Heliothis armiger). This is the cotton worm of the South, there called boll worm. It is also sometimes called the tomato worm. It is the larva of a day-flying moth.
The difficulty in dealing with it is that when in the corn ear it is out of the reach of poisonous applications of any kind. Its depredations are extensive, especially in early corn. It prefers corn to all other foods, and cotton planters protect their crops by planting early corn in the cotton fields and then destroying the corn and the worms within the ears.