INVESTIGATION OF THE RESISTANCE TO BLACK SHANK DISEASE IN SOME LARGE LEAF TOBACCOS

Tashkoski, Petre (2008) INVESTIGATION OF THE RESISTANCE TO BLACK SHANK DISEASE IN SOME LARGE LEAF TOBACCOS. Tobacco, 58 (1-2). pp. 27-34. ISSN 0494-3244

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Official URL: http://www.tobaccobulletin.mk/

Abstract

Two techniques were used in investigations of large leaf tobacco resistance to black shank - inoculation of leaf tissue strips with suspension and inoculation of the main nerve with a fragment of pure culture of the pathogen. Intensity of disease in the tested species and varieties was variable upon both pathogen races (race 0 and race 1), inoculated by both techniques. Analysis of the results for the resistance in leaf strips and whole leaves shows the following: Investigated tobacco varieties showed significant differences in resistance against both races, depending on the resistance of variety and aggressiveness of the pathogen isolate. Resistance degree is more expressed through inoculation of tobacco leaf tissue strips than in inoculation of the main nerve with fragment, where intensity of disease is much higher. The higher intensity of disease in inoculated leaves is a result of rapid spreading of infection through the conductive vessels. The lowest resistance against both races was noticed in varieties Ky14 and Ky14xL8, with disease index ranging between 2 and 3, depending on the inoculation technique. Varieties Coker 371 and Beinhart 1000 confirmed a high resistance degree against both races with indexes 0 and 1 in inoculation of tobacco leaf tissue strips and of the main nerve.

Item Type: Article
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Agriculture, forestry and fisheries
Divisions: Scientific Tobacco Institute
Depositing User: Ms Biljana Jordanoska
Date Deposited: 03 Nov 2016 20:45
Last Modified: 03 Nov 2016 20:45
URI: http://eprints.uklo.edu.mk/id/eprint/393

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