Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE INSECT WORLD. 263 Currants and lilacs arc frequently attacked by borers of this family, and on currants considerable injury is sometimes done by Sesia tipuliformis. Here the best remedy is to cut out the dead stalks in spring, just as soon as leafing out shows where the attack is located, and every wilted shoot seen at any time should be cut off at once below the point affected. The cut stems must, of
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE INSECT WORLD. 263 Currants and lilacs arc frequently attacked by borers of this family, and on currants considerable injury is sometimes done by Sesia tipuliformis. Here the best remedy is to cut out the dead stalks in spring, just as soon as leafing out shows where the attack is located, and every wilted shoot seen at any time should be cut off at once below the point affected. The cut stems must, of course, be burnt inmiediately. An occasional liberal pruning back will prove useful in keeping down the insects, and is some times a benefit to the plants as well. As a whole, we may say that our methods of treatment of this family are in the nature of prevention where the species attack trees, and cutting out where they attack shrubs or herbaceous plants. Grape-vines, especially in city gardens or in villages, are often attacked by light-brownish caterpillars with black dottings, which are sometimes so abundant as actually to defoliate them. They become nearly an inch and a half in length when full ^'^- ^^3. grown, then bore into any soft, rotten, or e\'en comparatively sound wood, where they pupate and eventually emerge as active httle moths, expanding rather more than an inch, with black fore-wings having two pale yel- low blotches, and black hind wings with two white spots, of which that near the base is much the largest. The shoul- der tippets are yellow, and the insect is active during mid-day, hovering about the vines in the brightest sunshine. It is the Alypia odo-maadata, or 8-spotted forester, common throughout the Eastern and Central United States on wild as well as cultivated vines and Virginia creeper, but rarely troublesome, except near or in cities or towns. The cater- pillars feed quite exposed, and may be easily destroyed by means of the arsenites. In city gard
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