Abstract: A new compound, named Substance No. 51262, may be produced by cultivating a suitable microorganism of the genus Streptomyces, especially the new strain SANK 63584 (FERM BP-958). Said compound has herbicidal and growth retardant properties.

Abstract: A new compound, named Substance No. 51262, may be produced by cultivating a suitable microorganism of the genus Streptomyces, especially the new strain SANK 63584 (FERM BP-958). Said compound has herbicidal and growth retardant properties.

Abstract: An ester of a compound having the formula ##STR1## wherein R.sub.1 represents hydrogen atom or a lower alkyl group,R.sub.2 represents a lower alkyl group or a lower alkenyl group,n is an integer of 1 to 4,Z represents a halogen atom, nitro group, a lower alkyl group, a halogenated lower alkyl group, a lower alkoxy group, a lower alkanesulfonyl group, cyano group, a lower alkylthio group, an alkanoyl group having 2 to 5 carbon atoms, or benzoyl group, and when n is 2, 3, or 4, Z's may be the same or different.The esters are suitable for use in herbicidal compositions.

Abstract: Herbicidally active compound having the formula ##STR1## wherein R.sub.1 represents hydrogen atom or a lower alkyl group,R.sub.2 represents a lower alkyl group or a lower alkenyl group,X represents a variety of substituents of the phenyl ring, andY represents oxygen or sulfur, andthe salts and organic acid esters thereof.

Abstract: Pyrazole derivatives of formula (I): ##STR1## (R.sup.1 is methyl, halogen or nitro; n is 2 or 3; R.sup.2 is hydrogen, C.sub.1-4 alkyl, C.sub.3-4 alkenyl or aralkyl; R.sup.3 is C.sub.1-4 alkyl, C.sub.3-4 alkenyl or phenyl; A is C.sub.1-5 alkylene) are of use as herbicides.

Abstract: Herbicidally active compound having the formula ##STR1## wherein R.sub.1 represents hydrogen atom or a lower alkyl group,R.sub.2 represents a lower alkyl group or a lower alkenyl group,X represents a variety of substituents of the phenyl ring, andY represents oxygen or sulfur, and the salts and organic acid esters thereof.

Abstract: Herbicidal compositions containing as an active ingredient one or more of the pyrazole compounds having the formula ##STR1## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.2 represents a lower alkyl group or a lower alkenyl group, X represents a halogen atom, nitro group, a lower alkyl group, a halogenated lower alkyl group, a lower alkoxy group, a lower alkanesulfonyl group, cyano group, a lower alkylthio group or an aliphatic acyl group and n is an integer of 1 to 4 and when n is 2, 3 or 4, X's may be the same or different), salts thereof and organic acid esters thereof, as well as new pyrazole compounds having herbicidal activities and the formula ##STR2## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.

Abstract: Herbicidal compositions containing as on active ingredient one or more of the pyrazole compounds having the formula ##STR1## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.2 represents a lower alkyl group or a lower alkenyl group, X represents a halogen atom, nitro group, a lower alkyl group, a halogenated lower alkyl group, a lower alkyl group, a lower alkanesulfonyl group, cyano group, a lower alkylthio group or an aliphatic acyl group and n is an integer of 1 to 4 and when n is 2, 3 or 4, X's may be the same or different), salts thereof and organic acid esters thereof, as well as new pyrazole compounds having herbicidal activities and the formula ##STR2## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.

Abstract: Herbicidal compositions containing as an active ingredient one or more of the pyrazole compounds having the formula ##STR1## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.2 represents a lower alkyl group or a lower alkenyl group, X represents a halogen atom, nitro group, a lower alkyl group, a halogenated lower alkyl group, a lower alkoxy group, a lower alkanesulfonyl group, cyano group, a lower alkylthio group or an aliphatic acyl group and n is an integer of 1 to 4 and when n is 2, 3 or 4, X's may be the same or different), salts thereof and organic acid esters thereof, as well as new pyrazole compounds having herbicidal activities and the formula ##STR2## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.

Abstract: Herbicidal compositions containing as an active ingredient one or more of the pyrazole compounds having the formula ##STR1## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.2 represents a lower alkyl group or a lower alkenyl group, X represents a halogen atom, nitro group, a lower alkyl group, a halogenated lower alkyl group, a lower alkoxy group, a lower alkanesulfonyl group, cyano group, a lower alkylthio group or an aliphatic acyl group and n is an integer of 1 to 4 and when n is 2, 3 or 4, X's may be the same or different), salts thereof and organic acid esters thereof, as well as new pyrazole compounds having herbicidal activities and the formula ##STR2## (wherein R.sub.1 represents hydrogen atom or a lower alkyl group, R.sub.

Abstract: Pyrazolone compounds of the formula ##STR1## WHEREIN R.sub.1 represents a hydrogen atom or a lower alkyl group, R.sub.2 represents a lower alkyl group or a lower alkenyl group, X represents a halogen atom, Y represents a halogen atom, a nitro group, a lower alkyl group or a lower alkoxy group, n is an integer of 1 to 3 and when n is 2 or 3, Y's may be the same or different. These compounds are useful as herbicides and obtainable by reacting the corresponding 5-pyrazolone derivatives with a halogenating agent.