The present invention relates to herbicidally active compositions comprising at least one piperazinedione compound of the formula I
in which:
R
x
, R
y
are each hydrogen or together are a chemical bond;
R
1
is cyano or nitro;
R
2
is hydrogen, fluorine, chlorine, C
1
-C
2
-alkyl, ethenyl or C
1
-C
2
-alkoxy;
R
3
is fluorine or hydrogen;
R
4
is methyl;
R
5
is hydrogen, methyl or ethyl;
R
6
is hydrogen, methyl or ethyl; and
R
7
is hydrogen or halogen;
and at least one further active compound selected from the group consisting of
b1) lipid biosynthesis inhibitors;
b2) acetolactate synthase inhibitors (ALS inhibitors);
b3) photosynthesis inhibitors;
b4) protoporphyrinogen-IX oxidase inhibitors,
b5) bleacher herbicides;
b6) enolpyruvyl shikimate 3-phosphate synthase inhibitors (EPSP inhibitors);
b7) glutamine synthetase inhibitors;
b8) 7,8-dihydropteroate synthase inhibitors (DHP inhibitors);
b9) mitose inhibitors;
b10) inhibitors of the synthesis of very long chain fatty acids (VLCFA inhibitors);
b11) cellulose biosynthesis inhibitors;
b12) decoupler herbicides;
b13) auxin herbicides;
b14) auxin transport inhibitors;
b15) other herbicides, and
C) safeners.