Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges economicentomolo00insmit Year: 1896 366 AN ECONOMIC ENTOMOLOGY. the latter type in the Eastern United States is seen in the round swellings so frequently found on the stems of golden-rod. A number of species are locally injurious to fruits, but there seems to be no one injurious form generally distributed throughout this country. In the Northern and Eastern United States the so- called ' apple'-maggot, Trypeta pomonella, is the on
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges economicentomolo00insmit Year: 1896 366 AN ECONOMIC ENTOMOLOGY. the latter type in the Eastern United States is seen in the round swellings so frequently found on the stems of golden-rod. A number of species are locally injurious to fruits, but there seems to be no one injurious form generally distributed throughout this country. In the Northern and Eastern United States the so- called ' apple'-maggot, Trypeta pomonella, is the only one causing trouble, the fly laying its eggs in the tissue of the apple by Fig. 421. Trypeta pomonella, parent of the apple-maggot. piercing the skin with its horny ovipositor. The little maggots channel the fruit in every direction, causing it to rot or become unsalable. When full-grown they pupate below the surface of the ground, or even among rubbish on the surface, or in crevices. Indeed, they are not at all particular, and transform wherever they can find an opportunity to do so, including the barrels, boxes, or bins in which infested apples have been kept. None of these fruit flies can be reached by insecticides, nor is there any fair chance of reaching the adults, and the only method that is effectual is the prompt removal and destruction of infested
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