Herbicidal n-heteroaryl pyrazole compounds

A compound of Formula (I):

• or an agronomically acceptable salt thereof,
• wherein
• A1, A2 and A3 are independently CH or N with the proviso that not more than one of A1, A2 and A3 are N;
• X is selected from the group consisting of O, S and CH2;
• Q is a 6-membered nitrogen containing heteroaryl which is optionally substituted by one or more R3;
• R1 is selected from the group consisting of C1-C4 alkyl, C1-C4 haloalkyl and C1-C4 alkoxy;
• R2 is selected from the group consisting of C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 haloalkoxy, halogen, C1-C4 alkoxy, —S—C1-C4alkyl and —S—C1-C4haloalkyl;
• R3 is selected from the group consisting of halogen, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy, C1-C4 haloalkoxy, —CN, NO2, C2-C4alkenyl, C2-C4alkynyl, —S(O)pC1-C4alkyl;
• and
• p=0, 1 or 2.