Abiotic transformation of kresoxim-methyl in aquatic environments: Structure elucidation of transformation products by LC-HRMS and toxicity assessment

•Kresoxim-methyl was more prone to degradation under alkaline conditions.•Suspect and non-target approaches were applied for the TPs identification.•17 transformation products in total were detected and structurally elucidated firstly.•ECOSAR results showed the high toxicity of some TPs from abiotic transformations.•Knowledge about toxicity of TPs is definitely needs more research.