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<p>Sclerotinia stem rot, caused by <i>Sclerotinia sclerotiorum</i>, is a major constraint on oilseed Brassica production. The pathogen was isolated, morphologically characterised, and its pathogenicity was confirmed by artificial inoculation. Field screening of 28 rapeseed-mustard genotypes showed disease incidence ranging from 23.10% to 51.27%, indicating significant variability but no complete resistance. SSR analysis with 12 markers detected 20 alleles (PIC up to 0.72) and grouped rapeseed-mustard genotypes into two major clusters, revealing moderate genetic diversity. Among management strategies, the fungicides Trifloxystrobin + Penflufen and Pyraclostrobin + Thiophanate Methyl were the most effective, reducing disease incidence by 78.70% and 75.00%, respectively. Selected Rhizobacterial isolates also exhibited strong in vitro antagonism against the pathogen, with inhibition up to 77.08%. These results highlight the potential of integrating moderate host resistance, effective fungicides, and rhizobacteria for sustainable management of Sclerotinia stem rot in oilseed Brassica.</p>

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Host resistance and integrated management of sclerotinia stem rot in oilseed Brassica

  • 期刊论文

  • 发表日期：

    2026年6月27日

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  • Pawar Dnyaneshwar Laxman,
  • Sangita Sahni,
  • Rushikesh Sanjay Mane,
  • Bishun Deo Prasad,
  • Rajesh Kumar

摘要

Sclerotinia stem rot, caused by Sclerotinia sclerotiorum, is a major constraint on oilseed Brassica production. The pathogen was isolated, morphologically characterised, and its pathogenicity was confirmed by artificial inoculation. Field screening of 28 rapeseed-mustard genotypes showed disease incidence ranging from 23.10% to 51.27%, indicating significant variability but no complete resistance. SSR analysis with 12 markers detected 20 alleles (PIC up to 0.72) and grouped rapeseed-mustard genotypes into two major clusters, revealing moderate genetic diversity. Among management strategies, the fungicides Trifloxystrobin + Penflufen and Pyraclostrobin + Thiophanate Methyl were the most effective, reducing disease incidence by 78.70% and 75.00%, respectively. Selected Rhizobacterial isolates also exhibited strong in vitro antagonism against the pathogen, with inhibition up to 77.08%. These results highlight the potential of integrating moderate host resistance, effective fungicides, and rhizobacteria for sustainable management of Sclerotinia stem rot in oilseed Brassica.