The invention belongs to the technical field of agricultural chemicals, and particularly relates to an N-(1,3,4-oxadiazol-2-yl)arylcarboxamide compound or a salt thereof, a preparation method, a herbicidal composition and a use thereof. The compound is as shown in the following Formula I:

##STR00001## wherein X represents O, S, SO, SO.sub.2 or NR.sub.1; Y represents halogen, cyano, cyanoalkyl, carboxyl, nitro, etc.; or —X—Y represents unsubstituted or substituted five- or six-membered heterocyclyl or heteroaryl; Z represents hydrogen, halogen, cyano, OR.sub.4, -alkyl-OR.sub.4, —O-alkyl-N(R.sub.5).sub.2, etc., M represents hydrogen, OR.sub.6, SR.sub.6, COR.sub.6, COOR.sub.6, CON(R.sub.7).sub.2, etc. The compound has advantages of a low dosage for use, excellent herbicidal activity, and higher crop safety, especially good selectivity for key crops such as rice.

The invention belongs to the technical field of agricultural chemicals, and particularly relates to an N-(1,3,4-oxadiazol-2-yl)arylcarboxamide compound or a salt thereof, a preparation method, a herbicidal composition and a use thereof. The compound is as shown in the following Formula I:

##STR00001## wherein X represents O, S, SO, SO.sub.2 or NR.sub.1; Y represents halogen, cyano, cyanoalkyl, carboxyl, nitro, etc.; or —X—Y represents unsubstituted or substituted five- or six-membered heterocyclyl or heteroaryl; Z represents hydrogen, halogen, cyano, OR.sub.4, -alkyl-OR.sub.4, —O-alkyl-N(R.sub.5).sub.2, etc., M represents hydrogen, OR.sub.6, SR.sub.6, COR.sub.6, COOR.sub.6, CON(R.sub.7).sub.2, etc. The compound has advantages of a low dosage for use, excellent herbicidal activity, and higher crop safety, especially good selectivity for key crops such as rice.

Compounds of formula (I)

##STR00001##

as defined herein are provided. Uses of these compounds for controlling invertebrate pests, protecting plant propagation material and providing an agricultural and a veterinary composition including the compounds are also described. Compounds for use as intermediate compounds in the preparation of compounds I are also described.

Compounds of formula (I)

##STR00001##

as defined herein are provided. Uses of these compounds for controlling invertebrate pests, protecting plant propagation material and providing an agricultural and a veterinary composition including the compounds are also described. Compounds for use as intermediate compounds in the preparation of compounds I are also described.

The present invention relates to mixtures comprising, as active components, 1) an insecticidal compound I selected from fipronil and ethiprole; and 2) a fungicidal compound IIA selected from azoles, strobilurins, carboxamides, heterocylic compounds, carbamates, and other active compounds, and optionally 3) one or two fungicidal compounds IIB selected from List B which is defined as List A plus triticonazole, orysastrobin, in synergistically effective amounts, all as further defined in the description.

The present invention relates to mixtures comprising, as active components, 1) an insecticidal compound I selected from fipronil and ethiprole; and 2) a fungicidal compound IIA selected from azoles, strobilurins, carboxamides, heterocylic compounds, carbamates, and other active compounds, and optionally 3) one or two fungicidal compounds IIB selected from List B which is defined as List A plus triticonazole, orysastrobin, in synergistically effective amounts, all as further defined in the description.

The present invention relates to mixtures comprising, as active components, 1) an insecticidal compound I selected from fipronil and ethiprole; and 2) a fungicidal compound IIA selected from azoles, strobilurins, carboxamides, heterocylic compounds, carbamates, and other active compounds, and optionally 3) one or two fungicidal compounds IIB selected from List B which is defined as List A plus triticonazole, orysastrobin, in synergistically effective amounts, all as further defined in the description.

Herbicidal mixtures comprising an auxin herbicide and an adjuvant comprising a salt having a quaternary ammonium cation and/or a phosphonium cation are described. The adjuvant reduces the volatility of the auxin herbicide and/or counteracts the negative impact on the volatility of the auxin herbicide caused by the addition of a co-herbicide. Methods of preparing the herbicidal mixtures are also described.

Herbicidal mixtures comprising an auxin herbicide and an adjuvant comprising a salt having a quaternary ammonium cation and/or a phosphonium cation are described. The adjuvant reduces the volatility of the auxin herbicide and/or counteracts the negative impact on the volatility of the auxin herbicide caused by the addition of a co-herbicide. Methods of preparing the herbicidal mixtures are also described.

Compositions and methods for increasing the efficacy of pesticidal compositions are described herein, including synergistic pesticidal compositions comprising: benzovindiflupyr, bixafen, boscalid, cyproconazole, fenpicoxamid, fenpyrazimine, florylpicoxamid, flutriafol, fluxapyroxad, isopyrazam, isotianil, kresoxim-methyl, metrafenone, oxathiapiprolin, penflufen, penthiopyrad, picoxystrobin, prothioconazole, pydiflumetofen, revysol, sedaxane, trifloxystrobin, pyraclostrobin, azoxystrobin, chlorothalonil, cyprodinil, metalaxyl, epoxiconazole, propiconazole, difenoconazole, fludioxonil, mancozeb, tebuconazole, valifenalate, in combination with a C4-C10 saturated or unsaturated aliphatic acid and methods for delivery of pesticidal active ingredients. Some pesticidal compositions and methods as described are directed to compositions and methods for increasing the efficacy of fungicides. Some pesticidal compositions and methods as described are directed to compositions and methods for increasing the efficacy of nematicides. Some pesticidal compositions and methods as described are directed to compositions and methods for increasing the efficacy of insecticides. Methods for enhancing the activity pesticidal active ingredients in pesticidal compositions in use are also described.