Abstract: Disclosed are compounds of Formula 1, N-oxides of the compounds and salts of the compounds and N-oxides: wherein R1, R2, R3, R4, R5, R6, Q1, Q2, J, Y1, and Y2 are as defined in the disclosure. Also disclosed are compositions containing the compounds, N-oxides and salts, and methods for controlling undesired vegetation comprising contacting the undesired vegetation or its environment with an effective amount of such a compound. N-oxide, salt or composition.