. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . Calandra granaria.—a, adult ; /', larva ; c, pupa ; d, C. oryza, adult. Sco/ytns rnguhsiis, the "fruit-bark beetle," is, perhaps, the best known, and certainly the most important economically, attacking deciduous fruit-trees of almost all kinds. The black parent beetles appear in early spring, and bore little round holes through the bark to the sap-wood. They then make a central burrow, on each side of which little notches are made to receive the soft white eg
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . Calandra granaria.—a, adult ; /', larva ; c, pupa ; d, C. oryza, adult. Sco/ytns rnguhsiis, the "fruit-bark beetle," is, perhaps, the best known, and certainly the most important economically, attacking deciduous fruit-trees of almost all kinds. The black parent beetles appear in early spring, and bore little round holes through the bark to the sap-wood. They then make a central burrow, on each side of which little notches are made to receive the soft white eggs. The larvae hatch very soon, and at once begin to make little burrows of their own, diverging as they move from the parent channel, and gradually enlarging them as they increase in size. When full grown they form a slightly enlarged chamber, in which they pupate, and w'hen they trans- form to beetles, make their way out through little round holes in the bark. The whole period of development does not exceed a month, and there may be several broods during the summer from the same tree, the numerous galleries eventually girdling and killiiiir it.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
