Proceedings of the Staten Island Association of Arts and Sciences Volume 2

Proceedings of the Staten Island Association of Arts and Sciences Volume 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...trees throughout the island during the past two or three years; and so many persons have evinced an interest in the matter and sought for information in regard to the phenomenon, that it has occurred to me to present a brief outline of what we have learned in regard to the nature of the cause and certain incidental correlated facts. The disease apparently had its origin somewhere in this vicinity and probably had begun its ravages before the time when it first attracted serious attention, in 1905. Exactly where the center of affection may have been has not been determined, nor is it certain where or by whom the effects were first systematically observed and recorded? By that time the disease had become so noticeable in Bronx Park that it could no longer be ignored by those who were responsible for the care of the trees, and an investigation was begun by Dr. Murrill to determine if possible the exact nature ' Presented October I7, 1908. 'Dr. VV. A. Murrill, "A Serious Chestnut Disease." Journ. N. Y. Bot. Gard. 7: I43-I53, figs. 1.--9. June, 1906. of the disease. Cultures were made from the affected trees, and healthy branches were inoculated and placed under careful observation. The cause was ascertained to be a hitherto unknown, or at least undescribed fungus, to which the name Diaporthe parasitica was given, in Torreya, 6: I89. Sept., 1906. This fungus is found to begin its destructive work beneath the outer bark, in the inner layers and cambium, in which the mycelium has its growth. The first indication of its presence is the death of the bark, which changes in color on the exterior to a pale brown. Later on, little yellowish pustules, containing the spores, appear on the surface, giving a warty appearance to more

Product details

  • Paperback | 86 pages
  • 189 x 246 x 5mm | 168g
  • United States
  • English
  • black & white illustrations
  • 1236815661
  • 9781236815668