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Background <p>Blue mold rot of onion is one of the most damaging diseases, reported in Pakistan during the current studies, and is responsible for losses at a considerable level in onion growing areas, during transportation, and in storages. The aim of the present study is to evaluate the antifungal potential of four <i>Trichoderma</i> species against <i>Penicillium expansum</i>; the causal agent of blue mold rot of onion in Pakistan.</p> Results <p>Efficacy of in vitro findings exhibited that <i>T. harzianum</i> and <i>T. viride</i> inhibited the growth of the test fungus by about 63%, whereas <i>T. virion,</i> followed by <i>T. hamentum,</i> inhibited the radial mycelial colony growth of <i>P. expansum</i> by 46%, followed by 33%; moreover, control Petri plates showed the maximum radial mycelial colony growth of test fungus. Efficacy of in vivo study exhibited that <i>T. harzianum</i> was found most potential antagonist with the highest antagonistic impact on onion against blue mold rot severity %, followed by <i>T. viride</i>. The antifungal potential against disease and blue mold rot of onion disease caused by <i>P. expansum</i> was efficient and the rot severity % on onion was recorded 37.3% followed by 51.0% treated with <i>T. viride</i> followed by <i>T. harzianum</i>, respectively, whereas control group showed 86.7% rottening in the onions.</p> Conclusion <p>Based on the findings of the present study, the <i>Trichoderma</i> species showed antifungal potential to reduce the mycelial growth of <i>P. expansum </i>in vitro condition and against the blue mold rot severity % on onion. <i>T. harzianum</i> reduced rot severity by 64% and <i>T. viride</i> by 41% indicating promising potential to control the blue mold rot of onion and are recommended for application as postharvest biocontrol agents in Pakistan for management of blue mold rot of onion. Future studies should focus on formulation development and commercial-scale validation.</p>

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Biological control of blue mold rot of onion using Trichoderma species in pakistan

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月17日

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  • Muhammad Waris,
  • Manzoor Ali Abro,
  • Jamal-U-Ddin Hajano,
  • Arfan Ahmed Gilal

摘要

Background

Blue mold rot of onion is one of the most damaging diseases, reported in Pakistan during the current studies, and is responsible for losses at a considerable level in onion growing areas, during transportation, and in storages. The aim of the present study is to evaluate the antifungal potential of four Trichoderma species against Penicillium expansum; the causal agent of blue mold rot of onion in Pakistan.

Results

Efficacy of in vitro findings exhibited that T. harzianum and T. viride inhibited the growth of the test fungus by about 63%, whereas T. virion, followed by T. hamentum, inhibited the radial mycelial colony growth of P. expansum by 46%, followed by 33%; moreover, control Petri plates showed the maximum radial mycelial colony growth of test fungus. Efficacy of in vivo study exhibited that T. harzianum was found most potential antagonist with the highest antagonistic impact on onion against blue mold rot severity %, followed by T. viride. The antifungal potential against disease and blue mold rot of onion disease caused by P. expansum was efficient and the rot severity % on onion was recorded 37.3% followed by 51.0% treated with T. viride followed by T. harzianum, respectively, whereas control group showed 86.7% rottening in the onions.

Conclusion

Based on the findings of the present study, the Trichoderma species showed antifungal potential to reduce the mycelial growth of P. expansum in vitro condition and against the blue mold rot severity % on onion. T. harzianum reduced rot severity by 64% and T. viride by 41% indicating promising potential to control the blue mold rot of onion and are recommended for application as postharvest biocontrol agents in Pakistan for management of blue mold rot of onion. Future studies should focus on formulation development and commercial-scale validation.