File:Diseases of truck crops - Ralph E. Smith (1940) (20962945162).jpg

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Title: Diseases of truck crops / Ralph E. Smith
Identifier: diseasesoftruckc119smit (find matches)
Year: 1940 (1940s)
Authors: Smith, Ralph E. (Ralph Eliot), 1874-1953
Subjects: Plant diseases; Plant parasites; Vegetables; Agricultural pests
Publisher: Berkeley, Calif. : College of Agriculture, Univ. of Calif.
Contributing Library: University of California, Davis Libraries
Digitizing Sponsor: University of California, Davis Libraries

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Diseases op Truck Crops 47 are visible to the eye in moist weather as a violet-gray, delicate mold. First the center of the hill is defoliated and finally the whole plant. No treatment is needed but in more humid regions applications of bordeaux mixture (p. 100) or copper-lime dust (p. 102) are made. Leaf Blight, Rust, Anthracnose.—In these diseases, the leaves show black spots which enlarge and kill the whole blade, starting in the cen- ter of the hill. Finally most of the leaves dry up and the fruit is stunted and worthless. These fungus diseases and other leaf troubles are not always distinguishable from each other without the aid of a microscope unless one is familiar with their symptoms. In anthra^mose, caused by
Text Appearing After Image:
Fig. 24.—Squash mosaic. Colletotrichum lagenarium, the melons may also be spotted, and may begin to rot. The name "rust" is sometimes applied to the leaf blight, or alternaria leaf spot, caused by Macrosponum ciicumerinum, but there is no true rust on any of the cucurbits. None of these troubles occur in the interior valleys of California, but they are not unknown in the coast districts. Thorough spraying with 4-4-50 bordeaux mixture (p. 100) as soon as any leaf spotting is seen is recommended for the control of all these diseases. Mosaic.—The young leaves of mosaic plants are stunted and de- formed, and mottled with yellow and green (fig 24). The fruit is also deformed and mottled in color. The disease, caused by a virus, is spread

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https://www.flickr.com/photos/internetarchivebookimages/20962945162/

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Volume
InfoField
E119
Flickr tags
InfoField
  • bookid:diseasesoftruckc119smit
  • bookyear:1940
  • bookdecade:1940
  • bookcentury:1900
  • bookauthor:Smith_Ralph_E_Ralph_Eliot_1874_1953
  • booksubject:Plant_diseases
  • booksubject:Plant_parasites
  • booksubject:Vegetables
  • booksubject:Agricultural_pests
  • bookpublisher:Berkeley_Calif_College_of_Agriculture_Univ_of_Calif_
  • bookcontributor:University_of_California_Davis_Libraries
  • booksponsor:University_of_California_Davis_Libraries
  • bookleafnumber:47
  • bookcollection:californiaagriculturalexperimentstationpublications
  • bookcollection:ucdavis
  • bookcollection:americana
  • BHL Collection
Flickr posted date
InfoField
29 August 2015



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