ARTICLES

A Rapid Method for Evaluating Genotype Resistance, Fungicide Activity, and Isolate Pathogenicity of Sclerotinia minor in Peanut¹

Authors: T. B. Brenneman , P. M. Phipps , R. J. Stipes

  • A Rapid Method for Evaluating Genotype Resistance, Fungicide Activity, and Isolate Pathogenicity of Sclerotinia minor in Peanut¹

    ARTICLES

    A Rapid Method for Evaluating Genotype Resistance, Fungicide Activity, and Isolate Pathogenicity of Sclerotinia minor in Peanut¹

    Authors: , ,

Abstract

Peanut stem segments 8.5-cm long were inoculated at leaf nodes with mycelial plugs of Sclerotinia minor and incubated in moist chambers at 20 C. Water-soaked lesions were often visible after 24 hr. The rate of lesion elongation was used to quantitatively assess the physiological resistance of peanut genotypes to Sclerotinia blight, screen chemicals for fungicidal activity, and evaluate the pathogenicity of S. minor isolates. The age and/or developmental state of lateral limbs of plants had a marked effect on lesion development; 3 days after inoculation, mean lesion lengths were 58.8, 46.8, and 38.9 mm for terminal, median and basal parts of stems, respectively. The speed, simplicity and adaptability of this method make it a valuable tool for research on Sclerotinia blight of peanut.

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Keywords: Arachis hypogaca, fungicide screening, germplasm evaluation, Sclerotinia blight

How to Cite:

Brenneman, T. & Phipps, P. & Stipes, R., (1988) “A Rapid Method for Evaluating Genotype Resistance, Fungicide Activity, and Isolate Pathogenicity of Sclerotinia minor in Peanut¹”, Peanut Science 15(2), p.104-107. doi: https://doi.org/10.3146/i0095-3679-15-2-15

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Published on
01 Jul 1988
Peer Reviewed

Author Notes

1This investigation was part of the senior authors doctoral research program.