. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Fig. 49. In nearlv all The American Currant Borer (Psenocerus supernotatus). The accompanying cut (Fig. 49) represents an enlarged view of a native currant borer, Psenocerus supernotatus ; the small outline figure shews the natural size. It is a beetle belonging to the family of longicorns, Cerambycidce, which doubtless had its home originally among the wild currant bushes of our woods, but a more extended and inviting field having been opened for it by the planting of the cultivated va
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. Fig. 49. In nearlv all The American Currant Borer (Psenocerus supernotatus). The accompanying cut (Fig. 49) represents an enlarged view of a native currant borer, Psenocerus supernotatus ; the small outline figure shews the natural size. It is a beetle belonging to the family of longicorns, Cerambycidce, which doubtless had its home originally among the wild currant bushes of our woods, but a more extended and inviting field having been opened for it by the planting of the cultivated varieties in our gardens, it has taken kindly to them, and although not so destructive as the imported currant borer, Egeria tipuliformis (Fig. 50), has in many instances, proved quite troublesome, our gardens numbers of the currant stalks annually perish, and were it not for the vigorous growth of new shoots from year to year, the bushes would soon be destroyed. If one of these stalks is split asunder, the cause of its death is manifest, for through its whole length it is found to be more or Fig. 50. }ess eaten away, the hollows being filled in places by a fine sawdust-like powder. This is sometimes the work of the imported currant borer (Fig. 50), and some- times the work of the native species (Fig. 49). Early in June the parent beetle of the native currant borer deposits her eggs upon the currant stalks, where they soon hatch into tiny grubs, which burrow into the heart of the stem, and feeding on its pith, reach full growth before the close of the season. They are footless grubs, which measure, when full-grown about half an inch in length. The head is scarcely half as broad as the body, is of a dark brown colour, with black jaws. The body is whitish with some brown dots along each side, and is slightly clothed with very fine short hairs. When full-grown, and about to change to a chrysalis, the larva gnaws a channel through the woody fibre to the outer bark, so that when chang
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
