File:A text-book of mycology and plant pathology (1917) (14578769439).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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ed by Endo-phyllum sempervivi. Right one, a healthy plant. (After Grove, W. B.: The BritishRust Fungi, 1913: 54. 10. Destruction of Organs.—The destruction of plant organs by theattack of fungi is well illustrated by the cereal smuts, which attack theflower parts reducing them to a black powdery mass of spores, which arecarried away, leaving nothing but the bare axis on which the flowerswere originally situated. 11. Excrescences and Malformations.—These will be treated of indetail in another chapter. Here it may be said that galls, pustules,tumors, corky outgrowths, crown galls, cankers, burls, or knauers,(Fig. 139) witches brooms (Fig. 140), etc., are evidences of diseasedconditions. The nature of these excrescences and malformations can-not be discussed here, but it may be said that they are specific andusually associated with the attack of some fungus, as for example theplum knot due to Flowrightia morbosa, the cedar apples formed on the SYMPTOMS OF DISEASE (SYMPTOMATOLOGY) 349
Text Appearing After Image:
Fig. 138.—Hepatica triloba parasitized by a rust fungus, Tranzschelia punctata,which causes some of the leaves to stiffen and grow erect. Left figure shows secia,April 29, 1915. 350 GENERAL PLANT PATHOLOGY red cedar by Gymnosporangium juniperi-virginiancE. The crown galls,or possible vegetal cancers, are another illustration of such excres-cences, while malformations are represented by peach leaf curl andthe witches brooms on trees. 12. Exudations.—The formation of slimy substances, which flowfrom trees and plants, the diseased conditions known as bacteriosis,gummosis^ and resinosis, illustrate the character of the exudations from

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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:366
  • bookcollection:ubclibrary
  • bookcollection:toronto
  • BHL Collection
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28 July 2014



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