Enantioselective effects of chiral amide herbicides napropamide, acetochlor and propisochlor: The more efficient R-enantiomer and its environmental friendly.

摘要: Amide herbicides, which are used extensively worldwide, often chiral. Enantiomeric selectivity comes from the different effects of enantiomers on target and non-target organisms. In this study, three amide herbicides were purified by semi-preparative column to investigate enantioselective Echinochloa crusgalli (lowland rice weeds), Microcystis aeruginosa, yeast transformed with human TRβ plasmid The results showed that (i) R-enantiomers exhibited strongest activity toward weed inhibition lowest toxicity organisms; (ii) napropamide was better suited for controlling root growth, while acetochlor propisochlor leaves control; (iii) at certain low concentrations (0.01 mg L^(−1) propisochlor) could be utilized promote plant growth. These findings encourage use R-amide instead their racemates increase efficiency control reduce risk On other hand, adverse caused mostly S-enantiomer, using R-enantiomer-enriched products may offer great environmental/ecological benefits.