Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. bage-worm,' and as they infest the plants at about the same time in midsummer, one appHcation of Paris green or London purple will answer for both insects. Fig. 341. The cabbage Plusia, P. brassiccz.—a, larva; b, pupa in its thin cocoon ; c, male adult. Another series of usually bright-colored, active moths that fly during the day, sometimes in the hottest sunshine, is the Helio- thini, which are usually white or yellow in color, and not infre- quently have a glossy
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. bage-worm,' and as they infest the plants at about the same time in midsummer, one appHcation of Paris green or London purple will answer for both insects. Fig. 341. The cabbage Plusia, P. brassiccz.—a, larva; b, pupa in its thin cocoon ; c, male adult. Another series of usually bright-colored, active moths that fly during the day, sometimes in the hottest sunshine, is the Helio- thini, which are usually white or yellow in color, and not infre- quently have a glossy or metallic lustre. Taken altogether, the species are not common, and are much more abundant both in specimens and species in the West and Southwest. But we have one form, abundant throughout the Eastern United States, which is at once the largest, least conspicuous, and most destructive of those belonging here, yielding little, in the injury it does, to any other Noctuid. It is the Heliothis ar^niger, whose caterpillar is locally known as the boll-worm' in the South, where it bores into cotton-bolls ; the ' corn-worm' in the North, from its habit . of eating into ears of corn, and the 'tomato-worm' in some of the Eastern States, from its habit of boring into tomatoes during the early part of the season. The species is one of the most difficult to deal with directly, from its habit of feeding concealed in such a way that in most cases the appHcation of arsenites is a practical impossibility. It has been found by experience that
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