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Tolerance of Sclerotinia minor to Procymidone and Cross Tolerance to Other Dicarboximide Fungicides and Dicloran¹

Authors: D. M. Porter , P. M. Phipps

  • Tolerance of Sclerotinia minor to Procymidone and Cross Tolerance to Other Dicarboximide Fungicides and Dicloran¹

    ARTICLES

    Tolerance of Sclerotinia minor to Procymidone and Cross Tolerance to Other Dicarboximide Fungicides and Dicloran¹

    Authors: ,

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Abstract

Procymidone-tolerant isolates of Sclerotinia minor Jagger were cross-tolerant to iprodione, vinclozolin and dicloran. Hyphal growth of procymidone-tolerant isolates an agar amended with 1 to 100 μg/mL procymidone, iprodione, vinclozolin or dicloran was similar. Procymidone-tolerant isolates were tolerant to all fungicides after 10 weekly hyphal tip transfers to nonamended agar. Subsequently, cross-tolerance persisted on agar amended with either 10 μg/mL procymidone, iprodione, vinclozolin or dicloran. Most procymidone-tolerant isolates of S. minor were pathogenic to peanuts (Arachis hypogaea L.) and caused symptoms similar to those initiated by sensitive isolates.

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Keywords: fungicide resistance, Sclerotinia blight, epidemiology, peanuts, Arachis hypogaea

How to Cite:

Porter, D. & Phipps, P., (2022) “Tolerance of Sclerotinia minor to Procymidone and Cross Tolerance to Other Dicarboximide Fungicides and Dicloran¹”, Peanut Science 12(1), p.41-45. doi: https://doi.org/10.3146/pnut.12.1.0010

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Published on
31 Dec 2021
Peer Reviewed
License
Creative Commons Attribution-NonCommercial 4.0

Author Notes

1Cooperative investigation by Agricultural Research Service, U.S. Department of Agriculture, and the Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University.

Mention of firm names or trade products in this paper does not constitute a recommendation by the USDA nor does it imply registration under FIFRA.