File:A text-book of mycology and plant pathology (1917) (14765145562).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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Fig. 196.—Tobacco roots affected by rot (Thielavia basicola). i, Inoculated attwo months; 2, diseased root from^field. (After Gilbert, W. W., Bull. isB, U. S.Bureau of Plant Industry, 1909.) are according to Duggar (i) endosporous conidia, which are formed inchains in terminal branches, or clusters of branches. They are formedby basipetal septation, as short cylindric cells within the branch.The tip of the branch is broken off, and they are pushed out by osmoticforce, so that the branch has served as a spore case. The hyaline 552 SPECIAL PLANT PATHOLOGY
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Pj^,_ ^g^j—Root-rot fungus (Thielavia hasicola) in various stages. (After Gilbert,W. W., Bull. 158, U. S. Bureau of Plant Industry, igog.) DETAILED ACCOUNT OF SPECIFIC PLANT DISEASES 553 endospores measure 10 to 20fj. by 4 to 5)U. (2) Another kind of spore is thethick-walled chlamydospore which is cylindric in shape, borne in chainsand measures about iifx in width. (3) The third kind of spore is theascospore, which is borne in evanescent asci in simple perithecia. Theascospores are unicellular and measure about 12/1 by 5/x. To check or control the disease sterilization of the soil has beenpractised. All diseased roots about the place should be destroyed byfire. Timber Decay (Stereum friisttdosum (Pers.), Fr.).—The fruit bodies of thisfungus appear as slightly raised gray spots thickly placed on thesurface of wood and timber (Fig. 85). The fruiting bodies are 2to 5 mm. in diameter. The action of this fungus on structural wood ischaracteristic, as it forms pocket-like areas in the d

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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:569
  • bookcollection:ubclibrary
  • bookcollection:toronto
  • BHL Collection
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28 July 2014

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