File:A text-book of mycology and plant pathology (1917) (14578777578).jpg

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Identifier: textbookofmycol00hars (find matches)
Title: A text-book of mycology and plant pathology
Year: 1917 (1910s)
Authors: Harshberger, John W. (John William), 1869-1929
Subjects: Plant diseases Fungi
Publisher: Philadelphia : P. Blakiston's Son & Co.
Contributing Library: University of British Columbia Library
Digitizing Sponsor: University of British Columbia Library

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Text Appearing Before Image:
Fig. 139.—Burl, or enlarged base of an oak tree in the forest on Gardiners Island, New York, July 17, 1915. plants under abnormal conditions. The production of clear amber-colored secretions, which accumulate on the surface of the diseased parts,is known as gummosis and is seen in cherries, apricots, almonds andmany other trees. It follows wounds or the attack of fungi. Thesame condition in coniferous trees is known as resinosis and in a fewtrees it is of economic interest because, as in the spruce, the exudation of * Wolf, Frederick A.: Gummosis. The Plant World, 15: 49-59, March, 1912.Butler, O.: A Study on (iummosis of Prunus and Citrus. Annals of Botany, 25: 107-153, 1910. SYMPTOMS OF DISEASE (SYMPTOMATOLOGY) 351
Text Appearing After Image:
Fig. 140.—Branch-knot or witches-broom of the Hackberry (Cellis occidentalis).(After Kellerman, W. A., Mycological Bulletin, Nos. 61-72, July, 1906. 352 GENERAL PLANT PATHOLOGY gum rosin known as spruce gum is collected and sold at from twodollars to two dollars and fifty cents a pound.^ Where due to the attackof bacteria it is called bacteriosis. Tumescence is the over-turgescenceof plant tissues due to the excess of water. It sometimes indicatespathologic changes and was formerly called oedema, or dropsy. Fluxis another name applied to the issuance of fluids from wounds in trees,while slime flux issuing from wounds may be frothy, owing to the fer-mentative activity of yeasts and other fungi, which live in such slimes.Manna flux is found in such trees as the manna ash and species oftamarisk. Cuckoo spit is a frothy material found on grasses and

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Author Harshberger, John W. (John William), 1869-1929
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Flickr tags
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  • bookid:textbookofmycol00hars
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Harshberger__John_W___John_William___1869_1929
  • booksubject:Plant_diseases
  • booksubject:Fungi
  • bookpublisher:Philadelphia___P__Blakiston_s_Son___Co_
  • bookcontributor:University_of_British_Columbia_Library
  • booksponsor:University_of_British_Columbia_Library
  • bookleafnumber:368
  • bookcollection:ubclibrary
  • bookcollection:toronto
  • BHL Collection
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28 July 2014
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