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<p><i>Cyperus rotundus</i>, a&#xa0;troublesome weed, poses significant challenges to crop production due to its competitive interference and resistance to various chemical herbicides. This study was designed with the objective of exploring the bioherbicidal properties of different essential oils from medicinal and aromatic plants in controlling <i>Cyperus rotundus </i>as a&#xa0;sustainable approach to weed management. The investigation has been conducted at CSIR-Central Institute of Medicinal and Aromatic Plants Research Centre Bengaluru India. The experiment was laid out in a&#xa0;completely randomized design (CRD), and the data were analysed using analysis of variance (ANOVA). Among 11&#xa0;essential oils from MAPs tested at 5% (v/v) spray concentration, the essential oils of lemongrass, cinnamon and <i>Pimenta</i> exhibited the growth inhibition of <i>Cyperus</i>. Application of 3% <i>Pimenta</i> oil induced significant mortality of 85.14% compared to lemongrass (71.35%) and cinnamon (58.45%). Additionally, <i>Pimenta</i> (3%) oil-treated rhizomes exhibited significantly lower germination rates (32.50%) and mean germination rates (0.120 per day) compared to lemongrass (45%, 0.129 per day respectively) and cinnamon (56.25%, 0.134 per day respectively). Evaluation of bioactive compounds revealed that eugenol from <i>Pimenta</i> oil induced a&#xa0;significant mean death percentage of 78.00%, followed by eugenol from cinnamon (71.67%) outperforming citral from lemongrass (51.67%). Furthermore, leaf anatomical analysis indicated the disruptions in cuticular wax, shrinkage of epidermal and hinge cells, and inward rolling of the leaf blade essential oil-treated plants evidencing the bio herbicidal efficacy of essential oils. Overall, the findings suggest that 3% <i>Pimenta</i> essential oil shows potential in controlling <i>Cyperus rotundus</i> with minimal or no adverse environmental effects.</p>

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Bioherbicidal Efficacy of Essential Oils of Medicinal and Aromatic Plants in Managing Cyperus rotundus—A Noxious Weed

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • N. D. Yogendra,
  • K. M. Prakhyath,
  • P. E. Keerthi,
  • R. Ravikumara,
  • Choudhury Priyankush,
  • V. S. Pragadheesh

摘要

Cyperus rotundus, a troublesome weed, poses significant challenges to crop production due to its competitive interference and resistance to various chemical herbicides. This study was designed with the objective of exploring the bioherbicidal properties of different essential oils from medicinal and aromatic plants in controlling Cyperus rotundus as a sustainable approach to weed management. The investigation has been conducted at CSIR-Central Institute of Medicinal and Aromatic Plants Research Centre Bengaluru India. The experiment was laid out in a completely randomized design (CRD), and the data were analysed using analysis of variance (ANOVA). Among 11 essential oils from MAPs tested at 5% (v/v) spray concentration, the essential oils of lemongrass, cinnamon and Pimenta exhibited the growth inhibition of Cyperus. Application of 3% Pimenta oil induced significant mortality of 85.14% compared to lemongrass (71.35%) and cinnamon (58.45%). Additionally, Pimenta (3%) oil-treated rhizomes exhibited significantly lower germination rates (32.50%) and mean germination rates (0.120 per day) compared to lemongrass (45%, 0.129 per day respectively) and cinnamon (56.25%, 0.134 per day respectively). Evaluation of bioactive compounds revealed that eugenol from Pimenta oil induced a significant mean death percentage of 78.00%, followed by eugenol from cinnamon (71.67%) outperforming citral from lemongrass (51.67%). Furthermore, leaf anatomical analysis indicated the disruptions in cuticular wax, shrinkage of epidermal and hinge cells, and inward rolling of the leaf blade essential oil-treated plants evidencing the bio herbicidal efficacy of essential oils. Overall, the findings suggest that 3% Pimenta essential oil shows potential in controlling Cyperus rotundus with minimal or no adverse environmental effects.