Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. 209 of apple-trees may suddenly wilt and the leaves become brown and dry, the fruit, if any, dropping to the ground. These wilted shoots will be found hollowed out, and the culprit is the larva of another litde brown longicorn, about one-quarter of an inch in length, quite robust and cylindrical, the wing-covers a little mottled with rather long, pale hair. It is a species of Eupogonius which has not figured much in economic literature, because its injuries rarely amou
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 THE INSECT WORLD. 209 of apple-trees may suddenly wilt and the leaves become brown and dry, the fruit, if any, dropping to the ground. These wilted shoots will be found hollowed out, and the culprit is the larva of another litde brown longicorn, about one-quarter of an inch in length, quite robust and cylindrical, the wing-covers a little mottled with rather long, pale hair. It is a species of Eupogonius which has not figured much in economic literature, because its injuries rarely amount to more than a light summer pruning. On smaller trees the infested shoots can be cut and destroyed and on larger trees careful winter pruning is indicated. A well-known orchard pest is the round-headed apple-borer, the larva of the Saperda Candida. It attacks quince in prefer- FiG. 200. Round-head apple-borer, Saperda Candida.—a, larva ; b, pupa ; adult. ence even to apple, but is more rarely found in pear. The beetle appears late in June or early in July, depending somewhat upon latitude, and lays its eggs on the trunk, as near to the surface of the ground as possible, under a loose bark-scale or in a little hole gnawed by its mandibles. The larva lives for a year in the sap wood, then bores into the trunk, up or down, sometimes some distance below the surface, and in the spring of the third year changes to a beetle. Trees of quite large size are killed in a - very few years, and for some time before are sickly and do not properly mature a crop of fruit. All sorts of remedies and devices have been proposed, cutting out the larvae being the one most relied upon even yet. This means, in many cases, making an additional large wound in the tree, and sometimes the remedy is worse than the disease. The best method of protection, and 14
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