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Studies on Corn Rust

Studies on Corn Rust


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... ally adhere to the host and germinate. When the spores were ap-plied to the host plants without the bloom removed the spores, almost invariably, were contained in the droplets of water col-lected on the hairs on the surface of the leaf and were held up from the leaf. The part of the suspension that was deposited on the leaf surface directly, readily ran off and left no evi-dence of remaining spores. It was noted with interest that the new leaves vfaich were barely out of the bud when the plant was inoculated were often infected at the tips. This infection was attributed to the suspension which ran off the leaves and was caught in the bud sheath, where it was retained long enough to germinate the spores and for infection to take place. The in-fections on the rubbed leaves proved very destructive, the ure-dinia coalesced on the tenth and eleventh days and on the four-teenth day the leaves were badly wilted and slightly yellow. They dried out rapidly. These experiments show that the amount of infection on corn plants depended upon the manner of applica-tion of the spores. LIFE HISTORY OP THE CAUSAL 0RGANISM IN RE-LATION T0 THE ER0DUCTIDN OF THE DISEASE Seasonal development of the disease The first appearance of the rust in the northern part of the corn belt was after the middle of July. Uredinia were found upon the leaves of the corn, but very sparsely. The disease did not spread very fast and did not reach its maximum until about the time of the first frost which was during the last part of September. It was during this period that teliospores made their appearance and developed until the cold weather killed the mycelium. These teliospores remained viable during the winter and after a definite "resting" period, germinated about the first...


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Product Details
  • ISBN-13: 9781230209326
  • Publisher: Theclassics.Us
  • Publisher Imprint: Theclassics.Us
  • Height: 246 mm
  • No of Pages: 18
  • Spine Width: 1 mm
  • Width: 189 mm
  • ISBN-10: 1230209328
  • Publisher Date: 12 Sep 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 54 gr


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