Phytotoxicity of essential oil of Pogostemon benghalensis and its potential use as bioherbicide

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Research Articles | Published:

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
Pub Email:
Doi: 10.1007/s42535-021-00262-6
First Page: 807
Last Page: 813
Views: 617

Keywords: Bioherbicide, Phytotoxicity, Weeds, Essential oil, Germination


The present study was conducted with an aim to assess the phytotoxicity of foliar volatiles and essential oil (EO) extracted from the aerial parts of Pogostemon benghalensis (Lamiaceae) against coffee weed (Cassia occidentalis) and barnyard grass (Echinochloa crus-galli). A foliar volatile bioassay was conducted using freshly chopped leaves of barnyard grass and coffee weed, and the results exhibited a significant growth retarding effect on both the weeds. GC–MS analysis of the EO revealed that the major compound present in the oil was Azulen-2-ol, 1,4 dimethyl-7-(1-methylethyl). In comparison to the control, a significant inhibition in the seedling growth and rate of germination was observed in response to EO (0.25–2.5 mg mL−1). Moreover, a significant decrease in the chlorophyll content of both the weeds was also evident upon application of foliar volatiles and EO of P. benghalensis. Present study concludes that the EO of P. benghalensis is phytotoxic towards the growth of weeds and can prove to be a potential candidate for use as an environment-friendly bioherbicide.

Bioherbicide, Phytotoxicity, Weeds, Essential oil, Germination

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Authors are thankful to the Department of Science and Technology (DST), New Delhi, India, for research project. Sangeeta Dahiya is thankful to the University Grants Commission (UGC, New Delhi, India) for research fellowship.

Author Information

Dahiya Sangeeta
Department of Botany, Panjab University, Chandigarh, India
Batish Daizy Rani
Department of Botany, Panjab University, Chandigarh, India

Singh Harminder Pal
Department of Environment Studies, Panjab University, Chandigarh, India