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• W1972466136 abstract "The present study evaluated the herbicidal potential of extracts from chicory (Cichorium intybus L.) roots on the germination of Echinochloa crusgalli L. Beauv and Amaranthus retroflexus L. Eight ultrasonic assisted-extraction (UAE) conditions were optimized, using an orthogonal matrix design. The extract concentrations that would yield the largest allelopathic effects on the plant species were estimated by a modeling analysis. Our results showed that an alcohol solvent extract of chicory root had significant herbicidal activity which depended on the extract concentrations and the target species. The half-inhibitory concentrations of crude extract of chicory root ranged from 0.5 g l−1 to 40.5 g l−1. At a frequency of 40 kHz, the optimum UAE conditions to produce an extract for use as herbicide against E. crusgalli L. included an ethanol content (Ec) of 50% (v/v), a solvent-to-solid ratio (SR) of 16:1, an ultrasound temperature (UT) of 35 °C, an impregnation time (Imt) of 24 h with two rounds of impregnation (Imr), a sonication period (St) of 120 min with two rounds of sonication (Sr) and an ultrasound input power (P) of 200 W. The optimum conditions to produce an extract for use against A. retroflexus L. included an Ec of 100% (v/v), a SR of 16:1, an UT of 20 °C, an Imt of 48 h with two Imr, a St of 30 min with one Sr and a P of 400 W. The extract had the largest inhibitory effects on the germination index and root growth of both E. crusgalli L. and A. retroflexus L. at concentrations ranging from 30.8 to 33.7 g l−1. At a concentration of 4.2 g l−1, the extract significantly enhanced the shoot growth of A. retroflexus L. Overall, chicory root extract has potential for use as a main ingredient in natural herbicides or for development as a novel plant-derived herbicide." @default.
• W1972466136 created "2016-06-24" @default.
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• W1972466136 date "2011-11-01" @default.
• W1972466136 modified "2023-10-04" @default.
• W1972466136 title "Optimization of ultrasonic-assisted extraction for herbicidal activity of chicory root extracts" @default.
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• W1972466136 doi "https://doi.org/10.1016/j.indcrop.2011.04.023" @default.
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