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<p>Rice stem rot (RSR) is a devastating fungal disease that poses a major challenge to rice production, causing considerable yield reductions in the North-Western region (NWR) of Haryana, India. To mitigate these losses, the present study aimed to assess the effectiveness of systemic fungicides and biorationals approaches in managing RSR during the <i>kharif</i> seasons of 2022 and 2023. Field trials were carried out at CCSHAU, Rice Research Station, Kaul, using a randomized block design with four replications. Among the three fungicides tested, hexaconazole 5% EC, proved most effective, reducing RSR severity by 76.15%. Among the botanical extracts and bioagents, garlic extract and <i>Trichoderma harzianum</i>, significantly reduced RSR severity by 42.20% and 26.44%, respectively, compared to the untreated control. All treatments led to significant enhancement in grain yield in both seasons, with hexaconazole 5% EC recorded the highest yield (7357.66&#xa0;kg/ha in <i>kharif</i> 2023; 7193.84&#xa0;kg/ha in <i>kharif</i> 2022) among fungicidal treatments, while in phytoextracts and bioagents, garlic extract and <i>T. harzianum</i> provided grain yield of 5898.25&#xa0;kg/ha in <i>kharif</i> 2023 and 5836.79&#xa0;kg/ha in <i>kharif</i> 2022, respectively. Greatest increase in grain yield was observed in <i>kharif</i> 2023 was associated with less rainfall (108.80&#xa0;mm) and slightly lower relative humidity (93.40%) compared to <i>kharif</i> 2022. These findings highlight hexaconazole, garlic extract and <i>T. harzianum</i> as promising approaches for RSR management, offering a combination of chemical and biorationals that could be integrated for sustainable disease suppression and improving grain yield in the NWR of Haryana, India.</p>

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Effectiveness of various fungicides and biorationals against Sclerotium oryzae catt causing stem rot of rice (Oryza sativa L.)

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Mahaveer Singh Bochalya,
  • S. Manojkumar,
  • Pavitra Kumari,
  • Ashwani Kumar,
  • Rakesh Kumar,
  • Vishal Gandhi,
  • Parvesh Kumar,
  • Amit Kumar

摘要

Rice stem rot (RSR) is a devastating fungal disease that poses a major challenge to rice production, causing considerable yield reductions in the North-Western region (NWR) of Haryana, India. To mitigate these losses, the present study aimed to assess the effectiveness of systemic fungicides and biorationals approaches in managing RSR during the kharif seasons of 2022 and 2023. Field trials were carried out at CCSHAU, Rice Research Station, Kaul, using a randomized block design with four replications. Among the three fungicides tested, hexaconazole 5% EC, proved most effective, reducing RSR severity by 76.15%. Among the botanical extracts and bioagents, garlic extract and Trichoderma harzianum, significantly reduced RSR severity by 42.20% and 26.44%, respectively, compared to the untreated control. All treatments led to significant enhancement in grain yield in both seasons, with hexaconazole 5% EC recorded the highest yield (7357.66 kg/ha in kharif 2023; 7193.84 kg/ha in kharif 2022) among fungicidal treatments, while in phytoextracts and bioagents, garlic extract and T. harzianum provided grain yield of 5898.25 kg/ha in kharif 2023 and 5836.79 kg/ha in kharif 2022, respectively. Greatest increase in grain yield was observed in kharif 2023 was associated with less rainfall (108.80 mm) and slightly lower relative humidity (93.40%) compared to kharif 2022. These findings highlight hexaconazole, garlic extract and T. harzianum as promising approaches for RSR management, offering a combination of chemical and biorationals that could be integrated for sustainable disease suppression and improving grain yield in the NWR of Haryana, India.