Allelopathic, Phytotoxic, and Insecticidal Effects of Thymus proximus Serg. Essential Oil and Its Major Constituents

• DOI: 10.3389/fpls.2021.689875
• Publication Date: 2021-06-15T08:34:52Z
• Authors: Shixing Zhou; Caixia Han; Chenpeng Zhang; Nigora Kuchkarova; Caixia Wei; Chi Zhang; Hua Shao
• Keywords: Allelopathy; Carvacrol; Biopesticide; Phytotoxicity; Aphis gossypii

The chemical profile of Thymus proximus essential oil (EO) and its allelopathic, phytotoxic, insecticidal activity was evaluated. Carvacrol, p-cymene, γ-terpinene were detected as the major components EO, representing 85.9% total oil. About 50 g fresh plant material T. in a 1.5-L air tight container completely inhibited seed germination Amaranthus retroflexus Poa anuua . Meanwhile, EO exhibited potent phytotoxic activity, which resulted 100% failure both test species when 2 mg/ml (for A. ) 5 annua applied. also triggered significant on Aphis gossypii with LC value 6.34 ppm. Carvacrol identified main active compound responsible for suppressing effect EO. Our study is first determination compound, indicated their potential being further explored environment friendly biopesticides.