. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE CANES. ^05 gall-fly. These soon change to chrysalids, and they in turn produce after a time the perfect insects, which eat their way out through the substance of the gall, leaving small holes to mark the place of exit. These galls are not only the abode of the makers, the gall-flies, but are also frequented by other species known as guest-flies, and the presence of these as well as other parasitic species in company with the normal inmates is apt to perplex the observer, and renders it
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE CANES. ^05 gall-fly. These soon change to chrysalids, and they in turn produce after a time the perfect insects, which eat their way out through the substance of the gall, leaving small holes to mark the place of exit. These galls are not only the abode of the makers, the gall-flies, but are also frequented by other species known as guest-flies, and the presence of these as well as other parasitic species in company with the normal inmates is apt to perplex the observer, and renders it more difficult to discover the real authors of the mischief. This gall chiefly affects the black raspberry; it also occurs on the blackberry, and sometimes on the roots of the rose. Wherever these excrescences are found they should be col- lected and burnt. ATTACKING THE CANES. No. 176.—The Raspberry Cane-borer. Oherea himaculata Oliv. This insect in the larval state lives in the centre of the €ane, where it burrows a passage from above downwards, often causing the death of the cane. Its natural home is among the wild raspberries, but it has taken very kindly to the cultivated sorts, and appears indeed to prefer them. The perfect insect is a long-horned beetle (see Fig. 315), with a long and narrow black body, with the top of the thorax and the fore part of the breast pale yel- lowish; the wing-cases are covered with coarse Fm. 315. indentations and slightly notched at the ends, and there are two black spots on the thorax, which, however, are sometimes wanting, and a third black dot on the hinder edge, just where the wing-covers join the thorax. The beetles appear on the wing during the month of June, and, after pairing, the female proceeds to deposit her eggs, which she does in a very singular manner. 20. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrat
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
