Farmers' Register Volume 10

Farmers' Register Volume 10

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1842 edition. Excerpt: ...at rest, and cover the body above like a very sharp-ndged roof. The winged plant-lice provide for a succession of their race by stocking the plants with eggs in the autumn, as belbre stated. These are hatched in due time in the spring, and the young lice immediately begin to pump up sap from the tender leaves and shoots, increase rapidly in size, and in a short time coine to maturity. In this state, it is found that the brood, without a single exception, consists wholly of females, which are wingless, but are in a condition immediately to continue their kind. Their young, however, are not hatched from eggs, but are produced alive, and each female may be the mother of filieen or twenty young lice in the course of a single day. The plant-lice of this second generation are also winglesB Iemales, which grow up and have their young in due time; and thus brood alter brood is produced, even to the seventh generation or more, without the appearance or intervention, throughout the whole season, of a single male. This extraordinary kind of propagation ends in the autumn with the birth of a brood of males and Iemales, which in due time arquire wings and pair; eggs are then laid by these Iemales, and with the death of these winged individuals, which soon Ibllows, the race becomes extinct for the season. Plant lice seem to love society, and often herd together in dense masses, each one remaining fixed to the1 plant by means of its long tubular beak; and they rarely change their places till they have exhausted the part first attacked. The attitudes and manners oi these little creatures are exceedingly amusing. When disturbed, like restive horses they begin to kick and sprawl in the most ludicrous manner. They may be seen at limes suspended by their beak alone, ..show more

Product details

  • Paperback | 762 pages
  • 189 x 246 x 39mm | 1,334g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236631919
  • 9781236631916