Progress of research on chiral herbicides

The progress of the preparation technology of sole enantiomer,the enantioselective effects on plants and biotransformation effects of chiral herbicides were summarized.As their different biological properties,the bioactivity and mechanism,metabolic conversion and migration issues of chiral herbicides are enantioselective.The enantioselective phytotoxic effects on plants are complicated.The preferential inhibition shifts when the target objects or some other environmental elements are changed.Moreover,enantio-preferential degradation of herbicides in the environment is related not only to the physical and chemical properties of the herbicide,but also to the various environmental factors,such as soil types,the microbial community structure,pH and temperature which can change the fate of contaminant enantiomer.