Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ked lime, which will drive the beetles to wildplants, leaving the lime-dusted crop free. In the genus Phyllotreta we find another series of small speciesnot exceeding one-eighth of an inch in length, ordinarily black incolor, with yellow stripes or spots on the wing-covers. The Fig. 221. most common species in theEast is the wavy-striped flea-beetle, P. vittata, in whichthere is a distinct yellow stripethrough the middle of each ely-tron. The adults feed upon theleaves of cab
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ked lime, which will drive the beetles to wildplants, leaving the lime-dusted crop free. In the genus Phyllotreta we find another series of small speciesnot exceeding one-eighth of an inch in length, ordinarily black incolor, with yellow stripes or spots on the wing-covers. The Fig. 221. most common species in theEast is the wavy-striped flea-beetle, P. vittata, in whichthere is a distinct yellow stripethrough the middle of each ely-tron. The adults feed upon theleaves of cabbage, radish, mus-tard, and others of the cruciferae,while the larvae live as minersin the tissues of the same dealing with this speciesthe important points are cleanculture and keeping down allcruciferous weeds. If in addi-tion all crop remnants are promptly gathered and destroyed, noserious danger need be apprehended. Following the flea-beetles is a series of very curious, somewhatwedge-shaped insects, the Hispidcs, in which the antennie arethickened, and the elytra, or wing-covers, broaden to the tip,. Striped flea-beetle, Phyllotreta vittata.—a, larva ; b, adult. A,V ECONOMIC ENTOMOLOGY. where they are rather abruptly terminated. The larvae are leaf-miners, and perhaps the most common species is the Odontotadorsalis, or locust-beetle, which occurs abundantly on the leavesin early summer, and is orange in color, with a broad blackstripe on the centre of each elytron. The eggs are covered witha Httle mass of excrement, and are laid singly, few leaves con-taining more than two or three. Not much real injury is doneby any of the species, and the suggestion that the adults feedexposed and succumb readily to the arsenites is all that is neces-sary on the subject of remedies. The adult CassidcB are called tortoise-beetles, or, by thesweet-potato grower, golden bugs. They are characterizedby their broad, almost quadrate form, flat under and convexupper side, and by the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
