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.

The presently claimed invention relates to a method for protecting plants or plant protecting material from attack or infestation by insects, fungi, arachnids, nematodes and unwanted weeds by treatment of root/shoot/seeds/soil by the use of active compounds in combina-tion with enzymes.

The presently claimed invention relates to a method for protecting plants or plant protecting material from attack or infestation by insects, fungi, arachnids, nematodes and unwanted weeds by treatment of root/shoot/seeds/soil by the use of active compounds in combina-tion with enzymes.

The presently claimed invention relates to a method for protecting plants or plant protecting material from attack or infestation by insects, fungi, arachnids, nematodes and unwanted weeds by treatment of root/shoot/seeds/soil by the use of active compounds in combina-tion with enzymes.

The present invention provides a compound having an excellent control effect on a harmful arthropod. A compound represented by formula (I) ##STR00001##
[wherein: A represents a CH or a nitrogen atom; R.sup.1 represents a hydrogen atom or a NR.sup.2R.sup.3; R.sup.2 and R.sup.3 are identical to or different from each other, and each represent a C1-C6 alkyl group, a hydrogen atom, or the like; and n represents 0, 1, or 2]
has an excellent control effect on a harmful arthropod.

The present invention provides a compound having an excellent control effect on a harmful arthropod. A compound represented by formula (I) ##STR00001##
[wherein: A represents a CH or a nitrogen atom; R.sup.1 represents a hydrogen atom or a NR.sup.2R.sup.3; R.sup.2 and R.sup.3 are identical to or different from each other, and each represent a C1-C6 alkyl group, a hydrogen atom, or the like; and n represents 0, 1, or 2]
has an excellent control effect on a harmful arthropod.

Disclosed are compositions and methods of pest control. The composition contains one or more active agents such as a polyalcohol, carbohydrate, nucleobase or nucleotide compound or derivative and one or more inactive ingredients which function as attractants or nutrients. The combination of the active agent(s) and the inactive ingredients achieves synergistic effect in pest control.

Disclosed are compositions and methods of pest control. The composition contains one or more active agents such as a polyalcohol, carbohydrate, nucleobase or nucleotide compound or derivative and one or more inactive ingredients which function as attractants or nutrients. The combination of the active agent(s) and the inactive ingredients achieves synergistic effect in pest control.

Disclosed are compositions and methods of pest control. The composition contains one or more active agents such as a polyalcohol, carbohydrate, nucleobase or nucleotide compound or derivative and one or more inactive ingredients which function as attractants or nutrients. The combination of the active agent(s) and the inactive ingredients achieves synergistic effect in pest control.