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Components of Resistance to an Indian Source of Cercospora Arachidicola in Selected Peanut Lines

OAR@ICRISAT

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Relation http://oar.icrisat.org/3102/
http://dx.doi.org/10.3146/i0095-3679-20-2-7
 
Title Components of Resistance to an Indian Source of Cercospora Arachidicola in Selected Peanut Lines
 
Creator Waliyar, F
McDonald, D
Subba Rao, P V
Reddy, P M
 
Subject Groundnut
 
Description Cercospora arachidicola Hori is one of the most important foliar pathogens worldwide that limits peanut production in farmers' fields. Earlier screening trials allowed us to identify lines with field resistance to early leafspot. In order to determine the components of resistance of these lines and other lines reported to be resistant elsewhere, 19 peanut genotypes (Arachis hypogaea L.) were evaluated by the detached leaf technique using an isolate of Cercospora arachidicola from the ICRISAT Center in India. Significant differences were observed among genotypes for all components of resistance included in the study. With a few exceptions, early leafspot- resistant genotypes (ICG nos. 8298, 6902, 6284, 1703, 10900, 7878, 9989 and 10920) exhibited longer incubation periods, reduced sporulation, smaller lesion diameters and lower infection frequencies than susceptible lines. Genotypes ICG 8298 and ICG 6902 were the most resistant, while ICG nos. 221, 7827 and 6340 were the most susceptible to early leafspot. A few lines had resistant reactions to some components but susceptibility to others.
 
Publisher American Peanut Research and Education Society
 
Date 1993
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3102/1/JA_1305.pdf
Waliyar, F and McDonald, D and Subba Rao, P V and Reddy, P M (1993) Components of Resistance to an Indian Source of Cercospora Arachidicola in Selected Peanut Lines. Peanut science, 20 (2). pp. 93-96. ISSN 0095-3679