File:Methods used in breeding asparagus for rust resistance (1913) (14785428123).jpg

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Identifier: methodsusedinbre263nort (find matches)
Title: Methods used in breeding asparagus for rust resistance
Year: 1913 (1910s)
Authors: Norton, J. B
Subjects: Asparagus-rust Asparagus
Publisher: Washington, G.P.O.
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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Text Appearing Before Image:
Fig. 2.—Cluster-Cup Stage of Rust on an Asparagus Stem. X 3.DIFFERENT STAGES OF PUCCINIA ASPARAGI. Bui. 263, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate IV.
Text Appearing After Image:
Asparagus Branch with Sori of Puccinia asparagi in Uredo and Teleuto Stages. X 5. PRELIMINARY WORK. 13 The spores from the cluster cups are usually rounded, orange yellow,and 1-celled. They are carried by air currents and lodge on thestems or cladodes of the asparagus plants. These spores germinatein the presence of moisture and produce a mycelium which growsinto the asparagus plant through the stomata or breathing pores.These spring spores provide the infection which causes the summerrust or uredo stage. It is in this stage that the serious damage isdone. The first signs of summer rust appear in about two or threeweeks after the development of the cluster cups. The uredo sporesappear in clusters of single-celled, red-brown spores which rupturethe epidermis and are carried away by the air currents to reinfectother plants. At this stage the rust spreads rapidly. In warmweather accompanied by dew at night, the life cycle from uredo sporeto uredo spore is often less than 12 days. This is

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https://www.flickr.com/photos/internetarchivebookimages/14785428123/

Author Norton, J. B
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
no.263
Flickr tags
InfoField
  • bookid:methodsusedinbre263nort
  • bookyear:1913
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Norton__J__B
  • booksubject:Asparagus_rust
  • booksubject:Asparagus
  • bookpublisher:Washington__G_P_O_
  • bookcontributor:U_S__Department_of_Agriculture__National_Agricultural_Library
  • booksponsor:U_S__Department_of_Agriculture__National_Agricultural_Library
  • bookleafnumber:17
  • bookcollection:usda-bulletinplantindustry
  • bookcollection:usdanationalagriculturallibrary
  • bookcollection:fedlink
  • bookcollection:americana
Flickr posted date
InfoField
28 July 2014


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