The present invention relates to isoxazoline-oxime derivatives of formula (I); where R1, R2, R3, R4, R5, R6, R7, R8 and X are as defined in claim 1; or a salt or N-oxide thereof. Furthermore, the present invention relates to processes and intermediates for making compounds of formula (1), to herbicidal compositions comprising these compounds and to methods of using these compounds to control plant growth.