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Sustainability 2017, 9(8), 1468; doi:10.3390/su9081468

Exploring Alternative Use of Medicinal Plants for Sustainable Weed Management

1
Department of Biological Production Science, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
2
Department of Crop Science, University of Ghana, P.O. Box LG 44, Legon, Accra, Ghana
3
Department of Agricultural Economics and Agribusiness, University of Ghana, P.O. Box LG 64, Legon, Accra, Ghana
4
Department of International and Environmental Agriculture Science, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
*
Author to whom correspondence should be addressed.
Received: 5 July 2017 / Revised: 27 July 2017 / Accepted: 15 August 2017 / Published: 18 August 2017
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Abstract

This paper presents the first application of ethnobotanical studies to screen for allelopathic species among medicinal plants for sustainable weed management. This study assesses the possible relationship between ethnobotanical indices and allelopathy of medicinal plants. Ethnobotanical data were collected in 2016 by using semi-structured interviews with 140 informants in the Ejisu-Juaben Municipality, Ghana. Data were analysed using statistical tool and ethnobotanical indices including use value (UV), Fidelity Level (FL), Relative Frequency of Citation (RFC). The Sandwich and Dish pack methods were respectively used to evaluate allelopathy through leachates and volatiles of collected samples. Ninety-five species belonging to 43 families are reported in this study, with leaves (52%) cited the most utilised plant part. Cleistopholis patens (UV = 0.54; FL = 90.7%; RFC = 0.37) and Ocimum gratissimum (UV = 0.37; FL = 38.4%; RFC = 0.35) were among the most cited species. Thirty-two species showed inhibition (≥49.3%) by leachates, while twenty-four species were found with potential volatile inhibitory compounds against lettuce radicle growth. There was a significant positive correlation (Pearson) between the UV and RFC of medicinal plants and allelopathy by leaf leachates (r = 0.639 **; p = 0.01 and r = 0.653 **; p = 0.01 respectively). This systematic documentation of medicinal plants in Ejisu-Juaben Municipality shows medicinal plants with ethnomedicinal values and potential allelopathy that can be utilised in sustainable weed control. View Full-Text
Keywords: medicinal plants; use value (UV); Fidelity Level (FL); Relative Frequency of Citation (RFC); ethnomedicine; allelopathy; sustainable weed control; Ejisu-Juaben Municipality medicinal plants; use value (UV); Fidelity Level (FL); Relative Frequency of Citation (RFC); ethnomedicine; allelopathy; sustainable weed control; Ejisu-Juaben Municipality
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Appiah, K.S.; Mardani, H.K.; Osivand, A.; Kpabitey, S.; Amoatey, C.A.; Oikawa, Y.; Fujii, Y. Exploring Alternative Use of Medicinal Plants for Sustainable Weed Management. Sustainability 2017, 9, 1468.

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