The present invention relates to a novel crystalline form of 1-(1,2-dimethylpropyl)-N-ethyl-5-methyl-N-pyridazin-4-yl-pyrazole-4-carboxamide recently assigned the common name dimpropyridaz. The invention also relates to the use of the crystalline form B for combating invertebrate pests and to formulations for plant protection which contain the crystalline form B of 1-(1,2-dimethylpropyl)-N-ethyl-5-methyl-N-pyridazin-4-yl-pyrazole-4-carboxamide. The crystalline form B according to the present invention can be identified by powder X-ray diffractometry on the basis of its powder X-ray diffraction diagram, hereinafter also termed powder X-ray diffraction pattern or PXRD pattern, of the polymorph form B recorded using Cu—Kα radiation (1.54178 Å) at 25° C. displays the 3 following reflections, quoted as 2θ values: 20.69±0.10°, 24.15±0.10° and 30.52±0.10°. In addition to these 3 reflections, the polymorph B of the present invention may display in such a PXRD pattern one or more, in particular at least 2, often at least 4, in particular at least 6 or at least 8 reflections and especially all of the reflections quoted hereinafter as 2θ values: 7.99±0.10°, 10.07±0.10°, 12.38±0.10°, 15.31±0.10°, 15.97±0.10°, 16.50±0.10°, 18.03±0.10°, 19.29±0.10°, 20.22±0.0.10°, 20.96±0.10°, 23.40±0.10°, 23.70±0.10°, 26.09±0.10°, 27.26±0.10° and 32.91±0.10°.

The present invention relates to a novel crystalline form of 1-(1,2-dimethylpropyl)-N-ethyl-5-methyl-N-pyridazin-4-yl-pyrazole-4-carboxamide recently assigned the common name dimpropyridaz. The invention also relates to the use of the crystalline form B for combating invertebrate pests and to formulations for plant protection which contain the crystalline form B of 1-(1,2-dimethylpropyl)-N-ethyl-5-methyl-N-pyridazin-4-yl-pyrazole-4-carboxamide. The crystalline form B according to the present invention can be identified by powder X-ray diffractometry on the basis of its powder X-ray diffraction diagram, hereinafter also termed powder X-ray diffraction pattern or PXRD pattern, of the polymorph form B recorded using Cu—Kα radiation (1.54178 Å) at 25° C. displays the 3 following reflections, quoted as 2θ values: 20.69±0.10°, 24.15±0.10° and 30.52±0.10°. In addition to these 3 reflections, the polymorph B of the present invention may display in such a PXRD pattern one or more, in particular at least 2, often at least 4, in particular at least 6 or at least 8 reflections and especially all of the reflections quoted hereinafter as 2θ values: 7.99±0.10°, 10.07±0.10°, 12.38±0.10°, 15.31±0.10°, 15.97±0.10°, 16.50±0.10°, 18.03±0.10°, 19.29±0.10°, 20.22±0.0.10°, 20.96±0.10°, 23.40±0.10°, 23.70±0.10°, 26.09±0.10°, 27.26±0.10° and 32.91±0.10°.

The present invention relates to the use of pyrimidine compounds of formula (I), ##STR00001## or their agriculturally acceptable salts or derivatives as herbicides, wherein the variables are defined according to the description, specific pyrimidine compounds of formula (I), compositions comprising them and their use as herbicides, i.e. for controlling harmful plants, and also a method for controlling unwanted vegetation which comprises allowing a herbicidal effective amount of at least one pyrimidine compounds of the formula (I) to act on plants, their seed and/or their habitat.

The present invention relates to the use of pyrimidine compounds of formula (I), ##STR00001## or their agriculturally acceptable salts or derivatives as herbicides, wherein the variables are defined according to the description, specific pyrimidine compounds of formula (I), compositions comprising them and their use as herbicides, i.e. for controlling harmful plants, and also a method for controlling unwanted vegetation which comprises allowing a herbicidal effective amount of at least one pyrimidine compounds of the formula (I) to act on plants, their seed and/or their habitat.

Disclosed herein are compositions comprising (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof and (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof. Also disclosed herein are compositions comprising (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof, (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof, and (c) a HPPD inhibitor herbicide. Also disclosed herein are methods of controlling undesirable vegetation, comprising applying to vegetation or an area adjacent the vegetation or applying in soil or water to control the emergence or growth of vegetation (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof, (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof, and (c) optionally, a HPPD inhibitor herbicide.

Disclosed herein are compositions comprising (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof and (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof. Also disclosed herein are compositions comprising (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof, (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof, and (c) a HPPD inhibitor herbicide. Also disclosed herein are methods of controlling undesirable vegetation, comprising applying to vegetation or an area adjacent the vegetation or applying in soil or water to control the emergence or growth of vegetation (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof, (b) a PS II inhibitor herbicide or an agriculturally acceptable salt or ester thereof, and (c) optionally, a HPPD inhibitor herbicide.

A compound represented by formula (I)

##STR00001## or an N-oxide compound thereof is provided with excellent control efficacies against harmful arthropods, wherein A.sup.1 represents a nitrogen atom or a CR.sup.4; R.sup.4 represents a hydrogen atom, a OR.sup.27, a NR.sup.27R.sup.28, a cyano group, a nitro group, or a halogen atom;

##STR00002##

hereinafter referred to as “Het”, represents Het-1, Het-2, Het-3, or Het-4:

##STR00003## wherein #.sup.1 represents the binding position of Het and T, and #.sup.2 represents the binding position of Het and

##STR00004## T represents T-1, T-2, T-3, T-4, T-5, T-6, or T-7:

##STR00005## R.sup.1 represents a C1-C10 chain hydrocarbon group having one or more halogen atoms or the like; and R.sup.2 represents a C1-C6 alkyl group optionally having one or more halogen atoms or the like.

A compound represented by formula (I)

##STR00001## or an N-oxide compound thereof is provided with excellent control efficacies against harmful arthropods, wherein A.sup.1 represents a nitrogen atom or a CR.sup.4; R.sup.4 represents a hydrogen atom, a OR.sup.27, a NR.sup.27R.sup.28, a cyano group, a nitro group, or a halogen atom;

##STR00002##

hereinafter referred to as “Het”, represents Het-1, Het-2, Het-3, or Het-4:

##STR00003## wherein #.sup.1 represents the binding position of Het and T, and #.sup.2 represents the binding position of Het and

##STR00004## T represents T-1, T-2, T-3, T-4, T-5, T-6, or T-7:

##STR00005## R.sup.1 represents a C1-C10 chain hydrocarbon group having one or more halogen atoms or the like; and R.sup.2 represents a C1-C6 alkyl group optionally having one or more halogen atoms or the like.

The present invention provides a compound represented by formula (I) or salt thereof (in the formula, A.sup.1 and A.sup.2 each independently represents a nitrogen atom or the like, B.sup.1, B.sup.2, B.sup.3 and B.sup.4 each independently represents a carbon atom or nitrogen atom, X.sup.1 represents an unsubstituted or substituted C1-6 alkyl group or the like, n represents a number of X.sup.1 and represents an integer of 0-4, R.sup.1 represents a halogeno group or the like, R.sup.2 represents an unsubstituted or substituted C1-6 alkyl group or the like, m represents a number of the oxide group bonding with the nitrogen atom which does not bond with R.sup.2 on the imidazole ring, and represents 0 or 1, R.sup.3 represents a hydrogen atom or the like, Ar represents an unsubstituted or substituted C6-10 aryl group.

##STR00001##

The present invention provides a compound represented by formula (I) or salt thereof (in the formula, A.sup.1 and A.sup.2 each independently represents a nitrogen atom or the like, B.sup.1, B.sup.2, B.sup.3 and B.sup.4 each independently represents a carbon atom or nitrogen atom, X.sup.1 represents an unsubstituted or substituted C1-6 alkyl group or the like, n represents a number of X.sup.1 and represents an integer of 0-4, R.sup.1 represents a halogeno group or the like, R.sup.2 represents an unsubstituted or substituted C1-6 alkyl group or the like, m represents a number of the oxide group bonding with the nitrogen atom which does not bond with R.sup.2 on the imidazole ring, and represents 0 or 1, R.sup.3 represents a hydrogen atom or the like, Ar represents an unsubstituted or substituted C6-10 aryl group.

##STR00001##