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Support of non-host resistance by artificial leaf coating / Herbeiführung einer Nicht-Wirt-Resistenz durch künstliche Blattüberzüge

W. Osswald, M. Niehuss, W. Huber and E. F. Elstner
Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz / Journal of Plant Diseases and Protection
Vol. 91, No. 4 (August 1984), pp. 337-344
Published by: Verlag Eugen Ulmer KG
Stable URL: http://www.jstor.org/stable/43382872
Page Count: 8
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Support of non-host resistance by artificial leaf coating / Herbeiführung einer Nicht-Wirt-Resistenz durch künstliche Blattüberzüge
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Abstract

The spraying of primary leaves of Phaseolus vulgaris cv. 'Favorit' with Merniel, an artificial surface adjuvans which forms high polymer layers on plant surfaces, reduced water loss by the leaves without decreasing photosynthetic activities or stomatal regulation. In addition to this beneficial effect which is only visible under drought conditions, protection against fungal infection was also observed: P. vulgaris cv. 'Favorit' is normally susceptible to infection by Uromyces phaseoli, but following Merniel treatment and subsequent inoculation with virulent spores, uredosori formation was inhibited by more than 95 %. Nach Besprühen der Primärblätter der Bohne Phaseolus vulgaris, Sorte 'Favorit', mit Merniel, das nach kurzer Zeit eine polymere Schicht auf den Blattflächen ausbildet, konnte unter Trockenbedingungen ein Transpirationsschutz ohne verringerte Photosyntheseleistung gemessen werden. Zusätzlich wurde ein Schutz vor Pilzinfektion erreicht. P. vulgaris Sorte 'Favorit' ist gegenüber dem Rostpilz Uromyces phaseoli anfällig. Nach Merniel-Behandlung konnte ein Infektionsschutz von mehr als 95 % erzielt werden.

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