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Rickettsialike organisms in latent rosette (witches' broom) diseased sugar beet (Beta vulgaris) and spinach (Spinacia olerácea) plants and in the vector Piesma quadratum Fieb) / Rickettsien-ähnliche Organismen in roseften-(hexenbesen-) kranken Zuckerrüben und Spinatpflanzen sowie in infektiösen Rübenblattwanzen (Piesma quadratum Fieb)

F. Nienhaus and H. Schmutterer
Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz / Journal of Plant Diseases and Protection
Vol. 83, No. 11 (1976), pp. 641-646
Published by: Verlag Eugen Ulmer KG
Stable URL: http://www.jstor.org/stable/43214144
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Rickettsialike organisms in latent rosette (witches' broom) diseased sugar beet (Beta vulgaris) and spinach (Spinacia olerácea) plants and in the vector Piesma quadratum Fieb) / Rickettsien-ähnliche Organismen in roseften-(hexenbesen-) kranken Zuckerrüben und Spinatpflanzen sowie in infektiösen Rübenblattwanzen (Piesma quadratum Fieb)
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Abstract

Rickettsialike organisms were found in ultrathin electron microscopic sections of the phloem tissue of rosette diseased sugar beets and spinach after transmission of the pathogens by Piesma quadratum from infected sugar beets. They were also observed in the vector tissue when the bug was reared on diseased plants. It is believed that the RLO are the cause of this type of rosette (witches' broom) disease. Rickettsien-ähnliche Organismen wurden elektronenoptisch in Ultradünnschnitten von Phloemgewebe rosettenkranker Zuckerrüben- und Spinatpflanzen nach Übertragung durch P. quadratum sowie im Vektor selbst nach Zucht auf kranken Pflanzen nachgewiesen. Vermutlich sind die RLO die Erreger der latenten Rosettenkrankheit.

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