• Combined oat-rapeseed-sorghum extract (PWE) contains various phytochemicals including flavonoids, polyphenols, and terpenoids
  • D-Limonene and gamma-terpinene were the major allelochemicals in the extract
  • PWE has been reported as a potent germination and growth inhibitor of wild mustard
  • PWE can be used as a potential weed management strategy to reduce the Corum herbicide dose in faba bean fields
The aim of this study was to investigate qualitative and quantitative chemical compounds of plant water extract (PWE), and the reduction potential of Corum herbicide (bentazone and imazamox) doses using PWE for weed control in faba bean fields. Chemical analysis revealed the presence of diverse allelochemicals including polyphenols, flavonoids, and terpenoids. The field experiment results showed clear differences between the measured traits in response to the applied treatments. The application of Corum at 1.5 l · ha–1, at 0.75 l · ha–1, and at 0.75 l · ha–1 + PWE significantly reduced weed density and biomass, with a weed control efficiency of 75.5–78.4, 57.4–53.3 and 68.2–56.9% during the first-second cropping seasons, respectively. Meanwhile, Corum at 1.5 l · ha–1 and at 0.75 l · ha–1 + PWE treatments guaranteed approximately the same yield components and improved the faba bean yield (Q · ha–1) by 65 and 40% in 2018–2019 and by 91 and 85% in 2019–2020, respectively. Therefore, the results suggest that PWE in combination with a lower herbicide dose (up to 50%) could be used as a potential weed management strategy in faba bean. Further research is required to understand the phytotoxic mechanisms of the studied extract-herbicide mixtures and their modes of action.
The authors would like to thank the Regional Center of Interface, University Sidi Mohamed Ben Abdellah, Fez (Morocco) for providing the GC-MS analysis. The authors also wish to thank the central research laboratory of the National School of Agriculture, Meknes (Morocco) for providing the FTIR analysis.
Kinga Matysiak
The authors have declared that no conflict of interests exist.
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