Pyrazolines for protecting crop plants against herbicides

A plant protection composition which contains an effective amount of a combination of a herbicide, selected from the group consisting of fenoxaprop-ethyl and fenoxaprop-P-ethyl, and a safener selected from the compounds of formula (I) ##STR7## where X radicals independently of one another are halogen or haloalkyl,

• n is an integer from 1 to 3,
• R.sup.1 is hydrogen, alkyl, cycloalkyl, trialkylsilyl, trialkylsilylmethyl or alkyloxyalkyl,
• R.sup.2 and R.sup.3 independently of one another are hydrogen, alkyl, C.sub.3 -C.sub.6 -cycloalkyl, alkenyl, alkynyl, haloalkyl, alkoxyalkyl, hydroxyalkyl, alkoxycarbonyl, alkylcarbonyl, alkylaminocarbonyl, optionally substituted phenyl, halogen or cyano, it being possible for the radicals R.sup.2 and R.sup.3 to form a ring with the 5-C atom of the pyrazoline ring.

A composition which protects crop plants and which contains as a safener an effective amount of a compound of formula (I) ##STR8## where X radicals independently of one another are halogen or haloalkyl,

• n is an integer from 1 to 3,
• R.sup.1 is hydrogen, alkyl, cycloalkyl, trialkylsilyl, trialkylsilylmethyl or alkyloxyalkyl,
• R.sup.2 and R.sup.3 independently of one another are hydrogen, alkyl, C.sub.3 -C.sub.6 -cycloalkyl, alkenyl, alkynyl, haloalkyl, alkoxyalkyl, hydroxyalkyl, alkoxycarbonyl, alkylcarbonyl, alkylaminocarbonyl, optionally substituted phenyl, halogen or cyano, it being possible for the radicals R.sup.2 and R.sup.3 to form a ring with the 5-C atom of the pyrazoline ring, and which, additionally, contains an herbicide and wherein the herbicide is fenoxaprop-ethyl or fenoxaprop-P-ethyl.

A composition which protects crop plants and which contains as a safener an effective amount of a compound of formula (I) ##STR9## where (X).sub.n is 2,4-dichloro,

• R.sup.1 is C.sub.1 -C.sub.4 -alkyl,
• R.sup.2 is hydrogen or methyl,
• R.sup.3 is (C.sub.1 -C.sub.4 -alkoxy)-carbonyl, and which, additionally, contains an herbicide, and wherein the herbicide is fenoxapropethyl or fenoxaprop-P-ethyl.

A composition which protects crop plants and which contains as a safener an effective amount of a compound of formula (I) ##STR10## where (X).sub.n is 2,4-dichloro,

• R.sup.1 is C.sub.1 -C.sub.4 -alkyl,
• R.sup.2 is hydrogen or methyl,
• R.sup.3 is (C.sub.1 -C.sub.4 -alkoxy)-carbonyl, and which, additionally, contains an herbicide, and wherein the herbicide is fenoxapropethyl or fenoxaprop-P-ethyl, which additionally contains common formulation auxiliaries and wherein the molar ratio of safener and herbicide is between 1:10 and 10:1.