The Farm Woodlot; A Handbook of Forestry for the Farmer and the Student in Agriculture

The Farm Woodlot; A Handbook of Forestry for the Farmer and the Student in Agriculture

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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. 1914 edition. Excerpt: ...early August is also effective. The caterpillars are much more susceptible than those of the gipsy moth. This, however, is more expensive. The banding of the trees with tanglefoot is also successful in the case of isolated trees, but the bands must be constantly watched to see that they do not become covered with dust, webs or dead caterpillars. Destruction of the pupae in June and early July is usually accompanied by severe poisoning. The pine-destroying beetle of the Black Hills This pine beetle (Dendroctinus ponderosa), is one of the most active and destructive insects in the West and has already ruined large areas of timber in the Black Hills. It is not, however, of very great importance from one point of view, because the bull pine, the species most subject to its attacks, is not very well adapted to woodlot growth. Hopkins describes the adult as "a stout, dark brown to black beetle, individuals of which vary in length from about i to j inch." The presence of the insect may be discovered by the fine, powdered dust sifting down the trunk of the tree. It first appears in August, when the adult beetles settle on the trees in swarms, and start their galleries, the resin and sawdust being pushed out of the opening where they form pitch tubes around the holes. These galleries are usually almost straight cut in the soft inner bark, often grooving the wood, and the eggs are laid in the notches along the sides. When the larvae hatch they start side galleries, at right angles to the primary gallery, that increase in size as the larva? grow. At the end of this gallery the fullgrown larvae dig a widened cavity in which pupation takes place. The adult digs from this cavity through the bark and passes on to another tree. A great number of more

Product details

  • Paperback | 70 pages
  • 189 x 246 x 4mm | 141g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236595033
  • 9781236595034