Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 THE INSECT WORLD. Z'^Z 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 The cabbage Plusia, P. byassiccB.~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 h
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 THE INSECT WORLD. Z'^Z 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 The cabbage Plusia, P. byassiccB.~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 lacgest, least conspicuous, and most destructive of those belonging here, yielding little, in the injury it does, to any other Noctuid. It is the Heliothis armiger, 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 application of arsenites is a practical impossibility. It has been found by experience that
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