Cocoa

Cocoa

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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: ...or even a few millimetres, and this cobweb-like growth is much coarser than the mycelium of the young "djamoer oepas," above mentioned. Later on the colour of the mycelium is white, and finally more or less brownish. The fungus also attacks tea, Ficus elastica, and several other cultivated and wild growing plants. Horse-hair blight.--This disease occurs in Trinidad, Grenada, and St. Lucia, and resembles a tuft of horsehair caught in the branches. Opinions are still divided as to the identity of the fungus (probably Marasmius eqtiicrinus), and it is also still uncertain whether the disease is really quite distinct from the "thread blight." Occasionally and sporadically it is responsible for considerable damage. The Surinam witch-broom disease (Colletotrichum luxificum).--This disease is happily limited to Surinam and Demerara, but the losses caused in these countries probably surpass those of any other disease of the cocoa plant. The most conspicuous symptoms are the remarkable hypertrophied twigs, called by the Dutch "krulloten" (" curly shoots "), and in English " witch-broom "--both names inappropriate, but at present popular. These deformed twigs, however, are not the cause of the loss. Their weakening effect on the tree is not so important Fig. 83.--A hypertrophied twig attacked by the Surinam witch-broom disease. (After Van Hall and Droit.) as the damage done by the fungus to the fruits. The "hardening" or "induration" of the attacked pods causes a total or partial loss of the seeds, and the number of fruits attacked has often been so great that the yield of the plantation has been reduced to onetenth of the normal, or even less. The "witch-brooms" (Fig. 83) are...show more

Product details

  • Paperback | 134 pages
  • 189 x 246 x 7mm | 254g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236550986
  • 9781236550989