Complex Synergistic Interactions among Volatile and Phenolic Compounds Underlie the Effectiveness of Allelopathic Residues Added to the Soil for Weed Control

synergistic interactions among the volatile (VOCs) and water-soluble compounds released to the soil matrix, complex mixtures of VOCs, phenolics, or both, mimicking the chemical profiles of Cytisus scoparius were prepared and then tested in vitro on the germination and early growth of two weeds. Two agricultural weed species, A. retroflexus (redroot pigweed) and D. sanguinalis (large crabgrass) from Herbiseed, were used as representative dicot and monocot target species, respectively.