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Home > Technical Bulletin Volume 20-27: (English)
Technical Bulletin Volume 20-27: (English)

Technical Bulletin Volume 20-27: (English)

          
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About the Book

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. 1920 Excerpt: ...published by the senior author in 1920 (6). There can be little doubt that blackfire existed prior to 1917 but there is no evidence that the specific character of the disease was recognized previously. References to similar leafspot troubles are found in non-technical literature prior to this year, and the names ' firing," "rust," "blackfire," "fieldfire," "wildfire, ' etc., have been used rather indiscriminately by tobacco growers for a half-century or more to designate certain leaf troubles of tobacco. The tobacco leaf is especially subject to leafspot injuries. Some of these are caused by fungous and bacterial parasites, others are presumably non-parasitic or physiological. The tobacco grower has not as a rule distinguished between the different kinds of spots and, as a matter of fact, the specialist often finds it difficult to separate them with certainty. The term wildfire is often employed by the grower to include both the blackfire and the true wildfire diseases. It should properly be used to designate the specific leafspot produced by Bacterium tabacum as first described from North Carolina by Wolf and Foster (9), and it will be so used in this discussion. The term blackfire is less commonly used by the grower and almost invariably serves to designate the angular-leafspot disease. The spots of this disease are often quite dark in color, especially in the early stage, and since they are not always angular the name blackfire is as good for descriptive purposes as angular-leaf spot. We shall, therefore, use the name blackfire in this discussion to designate the disease caused by Bact. angulatum It is probably true that blackfire has occured in Virginia for a number of years prior to 19.17. This is indicated by the...


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Product Details
  • ISBN-13: 9781130082692
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 78
  • Series Title: English
  • Weight: 154 gr
  • ISBN-10: 1130082695
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 4 mm
  • Width: 189 mm


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