Bulletin Volume 5-15

Bulletin Volume 5-15

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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. 1894 edition. Excerpt: ...the solvent could then take up another portion, which in turn would be absorbed by the fungus, and so on. In this manner poisoning might ensue, even though the copper were only very slightly soluble. From what has been said it can be seen that further researches on the conditions governing the solubility of the copper compounds used as fungicides are very much needed. Scarcely anything has been definitely settled. Almost all writers have overlooked a number of the conditions influencing solubility. AMOUNTS OF COPPEB IN SOLUTION NECESSARY TO KILL FUNGI AND ALGvE. This question has a very direct bearing in connection with any hypothesis to account for the efficiency of bordeaux mixture or any other fungicide containing copper. To Benedict Prevost belongs the credit of not only first discovering the fungicidal properties of copper and its compounds and applying them in practice, but also of determining with some degree of accuracy the amount of copper necessary to kill spores or prevent their germination. In a work published in 18072 he gives an account of.the discovery of the effect of the copper on spores of wheat smut (Tilletia tritici). This account is so interesting that a translation is here given: "Having found that a great number of substances when added to 'Pont, B. Le cuivre et lo mildiou (Jour. d'Agr. prat., 54- ann., T. II, No. 34, 1890, p. 276). HPrevo-t. Memoire sur la canso immediate de la cario on charbon des bles et de plnsienrs autres maladies de plantea et sur les pr(5servatifs de la carie (Montauban, 1807,4, p. 85). water give it the property of destroying the germs of the seeds of the smut, it remained for me to investigate which of these substances had in the highest degree all the qualities of a preventive...show more

Product details

  • Paperback | 164 pages
  • 189 x 246 x 9mm | 304g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236516761
  • 9781236516763