Insect pests of farm, garden and orchard . given them inMar^-land and \irginia. Tlie jiupal stage lasts al)out three weeks,when the adults emerge, the whole life cycle re([uiring from six toeight weeks. Usually two generations occur in a season through-out most of the tobacco belt, but in the North there seems to be INSECTS INJURIOUS TO TOBAC:CO 231. Fig. 164.—Hibernation of southern tobacco-worm; c, pupa in hibernatingcell in soil, at the depth of which pupation takes place in thestiffer soils; a, cross-section of pupal cell viewed from below; b, pupalcell showing entrance hole of la
Insect pests of farm, garden and orchard . given them inMar^-land and \irginia. Tlie jiupal stage lasts al)out three weeks,when the adults emerge, the whole life cycle re([uiring from six toeight weeks. Usually two generations occur in a season through-out most of the tobacco belt, but in the North there seems to be INSECTS INJURIOUS TO TOBAC:CO 231. Fig. 164.—Hibernation of southern tobacco-worm; c, pupa in hibernatingcell in soil, at the depth of which pupation takes place in thestiffer soils; a, cross-section of pupal cell viewed from below; b, pupalcell showing entrance hole of larva—two-third natural size. (AfterA. C. Morgan, V. S. Dept. Agr.) 232 IXSIXT TESTS OF FARM, CARDEN AND ORCHARD but one gciuiiitioii, and in tlii- (lull Slates there may be Occasionally the worms are overlooked in cuttingthe tobacco and are carried into tlie l)arn, where they may doconsiderable injury even after the tobacco is partially dry. Control.—The most common method of control is hand-pick-ing, usually termed worming. In seasons when the worms arenot overabundant this may be the most practical method of con-trol, but it is both tiresome and expensive, and the planter has nomeans of predicting whether the worms will be more or less abun-
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