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<p>Lentil (<i>Lens culinaris</i> Medic.) is a pulse crop of global economic significance. The crop is cultivated in arid and semi-arid regions, and several biotic factors are known to cause the degradation of yield and quality. Collar rot is one of the major diseases of lentil, caused by <i>Sclerotium rolfsii</i> Sacc. Studies were conducted in-vitro and on the field to devise an eco-friendly disease management strategy involving seed priming and soil application of bioagents. Among the 30 <i>Trichoderma</i> isolates collected from various regions of Uttar Pradesh, the Badaun isolate exhibited the highest mycelial growth inhibition of <i>S. rolfsii</i> (87.03%), followed by the Shahjahanpur isolate (84.81%). A highly significant difference was observed in the restriction of colony growth and sporulation under bioagent treatment experiments compared to the control. There was no recorded sclerotia formation in <i>Pseudomonas fluorescens</i>,<i> Trichoderma harzianum</i>,<i> T. viride</i>, Muzaffarnagar isolate, Meerut isolate-1, Meerut isolate-2, Hapur isolate-1, Bulendhshehar isolate, Moradabad isolate, Bijnor isolate, Shahjahanpur isolate, Badaun isolate, Sambhal isolate, Etah isolate, Hathras isolate, Bareilly isolate. The field experiment conducted during <i>Rabi</i> season of 2022-23 revealed that the maximum reduction in disease incidence (10.00%) and increase in yield (14.5 q/ha.) was recorded with seed biopriming with Badaun isolate (1 × 10⁷ CFU @ 10&#xa0;g/kg). This was followed by seed biopriming with <i>T. harzianum</i> (1 × 10⁷ CFU @ 10&#xa0;g/kg), which caused a reduction in disease incidence (11.67%) and an increase in yield (14.01 q/ha). Soil amendments substantially influenced yield, with treatment of vermicompost + <i>Trichoderma</i> isolate-16 + <i>P. fluorescens</i> yielding 13.38 q/ha and vermicompost + <i>T. harzianum</i> + <i>P. fluorescens</i> yielding 13.08 q/ha. The mean fresh weight of plants also varied significantly across different treatments. Seed biopriming with <i>Trichoderma</i> isolate-16 resulted in the highest fresh weight, followed by seed biopriming with <i>T. harzianum</i>. Altogether, these findings can contribute to devising a suitable integrated disease management strategy using seed biopriming with <i>T. harzianum</i> to mitigate collar rot disease in pulse crops.</p>

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Ecofriendly management of lentil (Lens culinaris Medic.) collar rot (Sclerotium rolfsii Sacc.) for sustainable organic production

  • 期刊论文

  • 发表日期：

    2025年5月2日

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  • Ajita Singh,
  • Prashant Mishra,
  • Kamal Khilari,
  • Ramesh Singh,
  • D. V. Singh,
  • M. K. Yadav

摘要

Lentil (Lens culinaris Medic.) is a pulse crop of global economic significance. The crop is cultivated in arid and semi-arid regions, and several biotic factors are known to cause the degradation of yield and quality. Collar rot is one of the major diseases of lentil, caused by Sclerotium rolfsii Sacc. Studies were conducted in-vitro and on the field to devise an eco-friendly disease management strategy involving seed priming and soil application of bioagents. Among the 30 Trichoderma isolates collected from various regions of Uttar Pradesh, the Badaun isolate exhibited the highest mycelial growth inhibition of S. rolfsii (87.03%), followed by the Shahjahanpur isolate (84.81%). A highly significant difference was observed in the restriction of colony growth and sporulation under bioagent treatment experiments compared to the control. There was no recorded sclerotia formation in Pseudomonas fluorescens, Trichoderma harzianum, T. viride, Muzaffarnagar isolate, Meerut isolate-1, Meerut isolate-2, Hapur isolate-1, Bulendhshehar isolate, Moradabad isolate, Bijnor isolate, Shahjahanpur isolate, Badaun isolate, Sambhal isolate, Etah isolate, Hathras isolate, Bareilly isolate. The field experiment conducted during Rabi season of 2022-23 revealed that the maximum reduction in disease incidence (10.00%) and increase in yield (14.5 q/ha.) was recorded with seed biopriming with Badaun isolate (1 × 10⁷ CFU @ 10 g/kg). This was followed by seed biopriming with T. harzianum (1 × 10⁷ CFU @ 10 g/kg), which caused a reduction in disease incidence (11.67%) and an increase in yield (14.01 q/ha). Soil amendments substantially influenced yield, with treatment of vermicompost + Trichoderma isolate-16 + P. fluorescens yielding 13.38 q/ha and vermicompost + T. harzianum + P. fluorescens yielding 13.08 q/ha. The mean fresh weight of plants also varied significantly across different treatments. Seed biopriming with Trichoderma isolate-16 resulted in the highest fresh weight, followed by seed biopriming with T. harzianum. Altogether, these findings can contribute to devising a suitable integrated disease management strategy using seed biopriming with T. harzianum to mitigate collar rot disease in pulse crops.