. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE STEMS. 337 the centre of the stem, where they burrow up and down, feeding on the pith all through tiie summer, enlarging the channel as they grow older, until at last they have formed a hollow several inches in length. When full grown, the larva (6, Fig. 350) is whitish and fleshy, of a cylindrical form, with brown head and legs, and a dark line along the middle of its back. Before changing to a chrysalis, a passage is eaten nearly through the stem, leaving merely the thin outer skin u
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE STEMS. 337 the centre of the stem, where they burrow up and down, feeding on the pith all through tiie summer, enlarging the channel as they grow older, until at last they have formed a hollow several inches in length. When full grown, the larva (6, Fig. 350) is whitish and fleshy, of a cylindrical form, with brown head and legs, and a dark line along the middle of its back. Before changing to a chrysalis, a passage is eaten nearly through the stem, leaving merely the thin outer skin unbroken, thus preparing the way for the escape of the moth. Within this cavity the larva changes to a chrysalis (a. Fig. 350, where both larva and chrysalis are shown magnified). Early in June the chrysalis wriggles itself forward, and, push- ing against the thin skin covering its place of retreat, ruptures it, and then partly thrusts itself out of the opening, when in a short time the moth bursts its prison-house and escapes, soon depositing eggs, from which larvae are hatched, which carry on the work of destruction. While this insect chiefly infests the red and white currant, it attacks the black currant also, and occasionally the goose- berry. Where the hollow stems do not break off*, indications of the presence of the borers may be found in the sickly look of the leaves and the inferior size of the fruit. Remedies.—In the autumn or spring all stems found hollow should be cut out and burnt. During the period when the moths are on the wing they may often be captured and de- stroyed in the cool of the morning, at which time they are comparatively sluggish. No. 203.—The American Currant-borer. Psenocerus supernotatus (Say). This borer is the larva of a beetle, and, although belong- ing to an entirely diff*erent order from No. 202, is very 22. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
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