. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . Canker-worm, larva of Anisoptriyxpovu-tayia. —a, h^ ej;"', enlarged ; e^ patch of eggs ; c, d, body of _/, larva ; r, pu;ia of female. a, larva of Paleaoila vernata ; b, an egg, much enlarged ; c, d, body segments of larva. trunk below any obstruction that it cannot pass. The young larvae will attempt to get to the leaves, and will, if they find an impassable barrier, starve to death. The best materials, all things considered, are " raupcnleim,"
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . Canker-worm, larva of Anisoptriyxpovu-tayia. —a, h^ ej;"', enlarged ; e^ patch of eggs ; c, d, body of _/, larva ; r, pu;ia of female. a, larva of Paleaoila vernata ; b, an egg, much enlarged ; c, d, body segments of larva. trunk below any obstruction that it cannot pass. The young larvae will attempt to get to the leaves, and will, if they find an impassable barrier, starve to death. The best materials, all things considered, are " raupcnleim," or " dendrolene," prefer- ably the latter, as it remains viscid for the full period during which the insects hatch, and forms a perfect barrier beneath or through which no creature can crawl and live. A band six inches in width and a quarter of an inch or more in thickness over thick wrapping-paper will prove a perfect protection. Fluffy wool or cotton may also be employed, and the former is the most lasting, but less certain than the "; A near relative of these canker-worms is the " lime-tree moth," Hybeniia ti/iaria, which also attacks a variety of trees, and has at times been decidedly troublesome. The application of the arsenites will prove a complete protection in this case ; indeed, we may say of all the caterpillars belonging to this funily, including the "canker-worms," that they can be controlled by the thor- ough application of stomach poisons to the plants upon which they feed.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
