Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . and success will be in proportion to thethoroughness with which the work is done. Instead of any ofthe preceding methods, insect lime or dendrolene maybe with proper precautions employed on the trunks and largerbranches, and, practically, this is the best material for use againstthe sinuate pear-borer. It can be easily applied, remainseffective for weeks, and one application, properly made at theright time, will protect the trees for the season. As against thepear-borer, it s
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . and success will be in proportion to thethoroughness with which the work is done. Instead of any ofthe preceding methods, insect lime or dendrolene maybe with proper precautions employed on the trunks and largerbranches, and, practically, this is the best material for use againstthe sinuate pear-borer. It can be easily applied, remainseffective for weeks, and one application, properly made at theright time, will protect the trees for the season. As against thepear-borer, it should be applied not later than May 15th, and kept intact until JuneFig. 175. 15th, when all danger from that pest is should bemade to the chapterson insecticides andpreventives for furtherdetails as to applica-tions. In the next series,the Lampyrid<£, thereare no species injurious to vegetation, though, under the namefire-flies, some of them are well known. The beetles areusually slender, somewhat flattened above, with a more or lessretracted head, and are of a soft leathery texture. The fire-. Fire-fly, Photiniis pyralis.—fl, larva; *, pu[)a in cell;c, adult; diof, structural details of larva. THE INSECT IVOPLD. 191 flies are first noticed in June in the more northern and centralportions of the United States, and have the terminal segmentsof the abdomen on the under side of a bright sulphur-yellowcolor, which at the will of the insect glows with a phosphorescentlight of considerable illuminating power. They hide during theday on the foliage of plants or in crevices, and begin their flightwith the deepening of the twilight. In some species the femaleis without wings and remains on the ground among the grass—the glow-worm. The larvae are predaceous, and some ofthem live on snails. Belonging to the same family, but of a diurnal habit and with-out the illuminating power, are the soldier-beetles, belongingto the genera ChaicUogna-thus and Tckphorus,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
