3-Phenylisoxazoline derivatives of the formula (I), and the use thereof as herbicides, are described.In this formula (I), X2 to X6 and R1 to R3 are radicals such as hydrogen, halogen, and organic radicals such as substituted alkyl. W* is carboxyl, cyano or CHO.本發明係說明式(I)之3-苯基異唑啉衍生物,及其作為除草劑之用途。於此式(I)中,X2至X6及R1至R3為基團,如氫,鹵素,及有機基團,如經取代之烷基。W*為羧基,氰基或CHO。