. Southern field crops (exclusive of forage plants). Agriculture. TOBACCO 545 The wire-worm (Chambus caliginosellus) is injurious to to- bacco plants in the Virginia tobacco fields. It is especially abundant on fields which have recently grown up in weeds. The means of reducing the amount of injury consists in preventing the growth of weeds, especially of the Iron weed {Vernonia), in fields where tobacco is soon to be grown. In case this weed is. Fig. 222. — Sotjthekn Tobacco Worm. u, adult moth; b, full-grown larva; o, pupa. present, it is recommended that instead of plowing it under it shoul
. Southern field crops (exclusive of forage plants). Agriculture. TOBACCO 545 The wire-worm (Chambus caliginosellus) is injurious to to- bacco plants in the Virginia tobacco fields. It is especially abundant on fields which have recently grown up in weeds. The means of reducing the amount of injury consists in preventing the growth of weeds, especially of the Iron weed {Vernonia), in fields where tobacco is soon to be grown. In case this weed is. Fig. 222. — Sotjthekn Tobacco Worm. u, adult moth; b, full-grown larva; o, pupa. present, it is recommended that instead of plowing it under it should be mowed and burned. By setting tobacco very late, this enemy is largely avoided, but the yield of tobacco is reduced. LABORATORY EXERCIS S In high schools located in regions where tobacco is not an important crop, it will usually be advisable to omit this chapter. The fact that the tobacco plant makes most of its growth 2n. 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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