. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges. Beneficial insects. 234 A A' ECONOMIC ENTOMOLOGY. This is one of those cases where persistent and universal practice is desirable to obtain the best results. An allied but larger species of the same genus without the elevations on the wing-covers is C. crataegi, which attacks the quince and sometimes does considerable injury, much as the C. nenuphar does on the fruits above enumerated. The same measures are indicated here also. The potato-stalk borer, Trichobaris
. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges. Beneficial insects. 234 A A' ECONOMIC ENTOMOLOGY. This is one of those cases where persistent and universal practice is desirable to obtain the best results. An allied but larger species of the same genus without the elevations on the wing-covers is C. crataegi, which attacks the quince and sometimes does considerable injury, much as the C. nenuphar does on the fruits above enumerated. The same measures are indicated here also. The potato-stalk borer, Trichobaris j-notata, is a small ash- gray weevil about one-sixth of an inch in length, with a black Fig. Potato-stalk borer, Trichobaris trinotata.—Larva, pupa, and adult. snout and three small black spots at the base of the wing-covers. It lays its eggs into the stems and larger branches of the potato, horse-nettle, Jimpson-weed {Datura stramoniuni), and, perhaps, other Solanaceae, and the white larvae feed there until after mid- summer, changing to pupae at about the time when the potato- vines mature, and to adult beetles a short time thereafter. The beetles remain in their larval burrows during the winter, and may be easily destroyed by burning the vines immediately after the potatoes are harvested. The species of Balaninus are known as nut-weevils, are of quite large size, clay-yellow in color, and with an exceedinglv long and slender, black beak or snout. By means of this thev puncture the burrs of young chestnuts, the husks of hickory and walnuts, and the green coverings of yovmg acorns, reaching near the centre of the nut itself, and placing an egg in the hole so. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, John Bernhard, 1858-1912. Philadelphia : J. B. Lippincott Co.
Size: 1933px × 1292px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1896
