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Plant Science Today (PST)

Research Articles

Vol. 13 No. sp1 (2026): Recent Advances in Agriculture

Evaluation of sweet flag (Acorus calamus L.) rhizome for its chemical properties and their effect on growth and seed longevity in field bean (Lablab purpureus L.)

DOI
https://doi.org/10.14719/pst.12667
Submitted
19 November 2025
Published
15-02-2026

Abstract

Sweet flag (Acorus calamus L.) is known for its pesticidal and seed-quality–enhancing properties due to its essential oil richness. The study quantified compounds in sweet flag rhizomes and assessed their effectiveness in improving field bean (var. HA-5) under field and laboratory conditions. Essential oil was extracted by hydro-distillation and quantified using gas chromatography (GC). A foliar spray experiment was conducted using a randomised complete block design (RCBD) to assess the effects of sweet flag rhizome powder, rhizome oil and a chemical check on crop growth, pest and disease incidence. A 9-month storage study was conducted under laboratory conditions to evaluate seed storability. The essential oil yield aveaged 0.29 % and was dominated by β-asarone. Results indicated that moderate concentrations of sweet flag rhizome powder and oil significantly improved seed emergence, plant growth- and plant stand, while also reducing pest and disease incidence. Seed treatment with rhizome powder at 10 g kg-1 consistently maintained higher seed quality during storage. Sweet flag rhizome-based treatments showed strong potential as eco-friendly options to enhance field performance and seed storability.

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