Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomolo00smit Year: 1906 w c ^ Round-head apple-borer, Saperda Candida.—a, larva ; b, pupa; c, 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
Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomolo00smit Year: 1906 w c ^ Round-head apple-borer, Saperda Candida.—a, larva ; b, pupa; c, 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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