AP680A

AP680A - Herbicidal compositions of 4-benzoylisoxazole or 2-cyano-1,3-dione herbcides and antidotes therefor

Info

Publication number: AP680A
Application number: APAP/P/1997/001023A
Authority: AP
Inventors: John Martin Shribbs; David Louis Lee
Original assignee: Syngenta Ltd
Priority date: 1995-01-09
Filing date: 1996-01-05
Publication date: 1998-09-30
Also published as: DE69607827D1; UA49819C2; CZ206897A3; CA2209937A1; HUP9800117A2; EP0802732B1; CN1079641C; JP3851348B2; PL186083B1; AU702142B2; AU4312996A; ZA9667B; PT802732E; HU218492B; US5627131A; KR100408797B1; BR9606891A; SK90997A3; TR199700607T1; ATE191829T1

Abstract

Herbicidal compositions containing 4-benzoylisoxazole or 2-cyno-1,3-dione compounds and antidotal compounds therefor to reduce injury to various crops, particulary corn, from thephytotoxic effects of 4-benzoylisoxazole or 2-cyno-1,3-dione herbicides when used alone in combination with additional pesticidally active ingredients. Methods for reducing phytotoxicity or injury to crop plants, particulary corn crops, due to 4-benzoylisoxazole or 2-cyno-1,3-dione herbicides are also described.

Description

HERBICIDAL COMPOSITIONS OF 4-BENZOYLISOXAZOLE OR 2-CYANO-1J3-DIONE HERBICIDES AND ANTIDOTES THEREFOR

FIELD OF THE INVENTION

This invention relates to herbicide compositions and methods of use and, more particularly, to certain herbicidal compositions comprising 4-benzoylisoxazole or 2-cyano1,3-dione compounds and antidotes therefor which are useful as herbicides.

BACKGROUND OF THE INVENTION

An herbicide is a compound which adversely controls or modifies plant growth, e.g., killing, retarding, defoliating, desiccating, regulating, stunting, tillering, stimulating and j dwarfing. The term “plant” refers to all physical pans of a plant, including seeds, seedlings, saplings, roots, tubers, stems, stalks, foliage, and fruits. “Plant growth” includes all phases of development from seed germination to natural or induced cessation of life.

Herbicides are generally used to control or eradicate weed pests. They have gained a high degree of commercial success because it has been shown that such control can increase crop yield and reduce harvesting costs.

The most popular methods of herbicide application include: prepiant incorporation into the soil; in-furrow application to seeds and surrounding soil; pre-emergence surface treatment of seeded soil; post-emergence treatment of the plant and soil; and preplant seed treatment.

A manufacturer of an herbicide generally recommends a range of application rates and concentrations calculated to maximize weed control. The range of rates varies from approximately 0.01 to 50 pounds per acre (0.0111 to 56 kilograms per hectare [kg/ha]), and is usually in the range of from 0.1 to 25 pounds per acre (0.112 to 28 kg/ha). The term “herbicidallv effective amount” describes an amount of an herbicide compound which adversely controls or modifies plant growth. The actual amount used depends upon several considerations, including particular weed susceptibility and overall cost limitations.

AP/P/ 97 / 0 1 0 2 3

An important factor influencing the usefulness of a given herbicide is its selectivity towards crops. In some cases, a beneficial crop is susceptible to the effects of the herbicide.

In addition, certain hcrbicidal compounds are phytotoxic to some weed species but not to others. To be effective, an herbicide must cause minimal damage (preferably no damage) to the beneficial crop while maximizing damage to weed species which infest the iocus of the crop.

To preserve the beneficial aspects of herbicide use and to minimize crop damage, many herbicide antidotes have been prepared. These antidotes reduce or eliminate damage to the crop without substantially impairing the damaging effect of the herbicide on weed species. See. for example, U.S. Patents Nos. 4.021.224, 4,021.229 and 4,230,874.

Identification of an antidote which safens an herbicide in crops is a highly complicated task. The precise mechanism by which an antidote reduces herbicidal crop injury has not been established. An antidote compound may be a remedy, interferent, protectant, or antagonist. As used herein, antidote” describes a compound which has the effect of establishing herbicide selectivity, i.e.. continued herbicidal phytotoxicity to weed species by the herbicide, and reduced or non-phvtotoxicity to the cultivated crop species. The term “antidotally effective amount” describes an amount of an antidote compound which counteracts to some degree a phvtotoxic response of a beneficial crop to an herbicide.

4-benzoviisoxazole and 2-cvano-l,3-dione compounds have been found to be very effective herbicides with broad general herbicidal activity against broad-leafed and grass weeds by pre- and/or post-emergence application. The method of controlling vegetation with .'--y these compounds comprises applying an herbicidallv effective amount of the compounds, usually with an inert carrier or diluent, to the area where herbicidal control is desired. However, the herbicidal 4-benzovlisoxazole and 2-cyano-l,3-dione compounds have been found in some instances to adversely affect or interfere with the cultivation of crop plants, especially com crops. Therefore, the effective use of these herbicides for controlling weeds in the presence of such crops is further enhanced by, or may require in many instances, the addition of an antidotally effective amount of a compound, which is antidotally effective with the herbicide.

It has now been discovered that certain compounds when used in an antidotally effective amount are effective antidotes for the protection of crops, especially corn crops, from

AP/P/ 9 7 / 0 1 0 2 3

AP,00680 adverse herbicidal injury or the reduction of adverse herbicidal injuiy caused by the use of an herbicidally effective amount of a 4-benzoylisoxazole or 2-cyano-l,3-dione compound. Therefore, it is an object of the present invention to provide compositions of 4benzoylisoxazole and 2-cyano-l,3-dione herbicides in combination with antidotes therefor, which compositions are useful to reduce injury to crops, especially com, due to phytotoxicity of these herbicides.

SUMMARY OF THE INVENTION

The present invention relates to herbicidal compositions comprising herbicidal 4benzoylisoxazole or 2-cyano-l,3-dione compounds and antidotal compounds therefor to reduce injury to various crops, particularly com, from the phytotoxic effects of such 4benzoylisoxazole or 2-cyano-l,3-dione herbicides when used alone or in combination with other compounds as co-herbicides.

More particularly, the invention relates to a composition comprising:

(a) (i) an herbicidal 4-benzoylisoxazole, or an agriculturally acceptable salt thereof; or (ii) an herbicidial 2-cyano-l,3-dione compound, or an agriculturally acceptable salt thereof; and (b) an antidotally effective amount of an antidote compound which is antidotaily effective with the herbicidal compound (a).

The invention further relates to methods for reducing phytotoxicity or injury to crop plants, particularly com crops, due to a herbicidal 4-benzoylisoxazole or 2-cyano-l,3-dione compound, or salt thereof by applying an antidotally effective amount of an antidote compound to the soil, crop or crop seed.

DETAILED DESCRIPTION OF THE INVENTION

4-Benzoylisoxazole herbicide compounds useful in the present invention are described in U.S. Patent Nos. 5,371,063, 5,371,064 and 5,374,606 and in European Patent Publication Nos. 0 418 175, 0 487 357, 0 527 036, 0 527 037 and 0 625 505, the disclosures of which are

AP/P/ 9 7 / 0 1 0 2 3

AP . ο ο 6 8 Ο incorporated herein by reference thereto. Herbicidal 4- benzoylisoxazole compounds for use in this invention may be prepared by the methods described in the aforementioned patent publications, or by the application and adaptation of known methods used or described in the chemical literature.

Many herbicidal 4-benzovlisoxazole compounds useful in this invention fall within the general formula

(I) wherein.

R represents a hydrogen atom: a halogen atom; a straight- or branched-chain alkyl, alkenyl or alkynvl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; a cycloalkvi group containing from 3 to 6 carbon atoms optionally substituted by one or more groups -R⁵. one or more halogen atoms or a group CO2R³; or a group selected from -CO2R³, -COR⁵. cyano, nitro, or -CONR^JR⁴;

R¹ represents a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; or a cycloalkyl group containing from three to six carbon atoms optionally substituted by one or more groups R⁵ or one or more halogen atoms;

R² represents a halogen atom: a straight- or branched-chain alkyl, alkenyl, alkynyl or alkoxy group containing up to six carbon atoms which is optionally substituted by one or more groups -OR⁵ or one or more halogen atoms: or a group selected from nitro, cyano, CO2R³, -S(O)fR⁶. -O(CH2)fflOR⁵, -COR⁵. -NR^6IR⁶², -N(R⁸)SO2R⁷, -OR⁵. -OSO2R⁷ , SO2NR³R⁴, -CONR³R⁴. -CSNR^:'R⁴ and -iCR⁹Rⁱ⁰\-S(O)„R⁷;

n represents an integer from one to five; when n is greater than one. the groups R² mav be the same or different:

AP.00 6 8 Ο

R³ and R^J each independently represents a hydrogen atom; or a straight- or branchedchain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

R⁵ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; a straight- or branchedchain alkenyl or alkynyl group containing from three to six carbon atoms which is optionally substituted by one or more halogen atoms; or phenyl optionally substituted by from one to five groups R² which may be the same or different;

R⁶, R⁶¹ and R⁶², which may be the same or different, each represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; or phenyl optionally substituted by from one to five groups R²which may be the same or different:

R⁷ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; phenyl optionally substituted by from one to five groups R² which may be the same or different; or a halogen atom:

R⁸ represents a hydrogen atom; a straight- or branched-chain alkyl, alkenyl or alkynvi group containing up to ten carbon atoms which is optionally substituted by one or more halogen atoms; a cycioalkyi group containing from three to six carbon atoms; phenyl optionally substituted by from one to five groups which may be the same or different selected from halogen, nitro, cyano. R⁵, -S(O)PR⁵ and -OR'': or a group selected from -SO2R⁶ and OR⁵;

R⁹ and R¹⁰, which may be the same or different, each represents a hydrogen atom; a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms: or phenvi optionally substituted by from one to five groups R which may be the same or different:

R and R '. which may be the same or different, each represents a hydrogen atom; or a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

£2010//6 /d/dV

AP . Ο Ο β 8 Ο ρ represents zero, one or two;

q represents zero, one or two;

m represents one, two or three:

t represents an integer from one to four: when t is greater than one the groups -CR⁹R¹⁰- may be the same or different;

or an agriculturally acceptable salt thereof which possesses herbicidal properties.

In certain cases, the groups R to R¹⁰, R⁵¹, R⁵², R⁶¹ and R⁶² may give rise to optical and/or stereoisomerism. All such forms are embraced by the present invention.

By the term “agriculturally acceptable salts’’ is meant salts the cations or anions of j which are known and accepted in the an for the formation of salts for agricultural or . horticultural use. Preferably the salts are water-soluble. Suitable acid addition salts, formed by compounds of formula (I) containing an ammo eroup, include salts with inorganic acids, for example, hydrochlorides, sulphates, phosphates and nitrates and salts with organic acids, for example, acetic acid. Suitable salts formed by compounds of formula (I) which are acidic, i.e., compounds containing one or more carboxy groups, with bases include alkali metal (e.g. sodium and potassium) salts, alkaline earth metal (e.g. calcium and magnesium) salts, ammonium and amine (e.g. diethanolamine, triethanolamine, octylamine. dioctylmethylamine and morpholine) salts.

One preferred class of compounds of formula (I) are those having the formula

AP/P/ 9 7 / 0 1 0 2 3

wherein R. R¹, R², R', R⁹, R¹⁰. n. q and t have the meanings set forth above.

In a further preferred embodiment where n is greater than one, the benzoyl ring of the compounds of formula (la) is 2.4-disubstituted or 2.3.4-trisubstituted. Compounds of formula (la) in which n is greater than one and the benzoyl nng of the compound of formula (la) is

2.3-disubstituted are also preferred.

AP.00680

A further preferred class of compounds of formula (Ia) are those wherein: R is hydrogen or -COjEt; R¹ is cyclopropyl; R² is a halogen atom or a group selected from -CF}, S(O)_pMe and -OMe: n is one, two or three; t is one; R⁷ is a straight- or branched -chain alkyl or alkenyl group containing up to four carbon atoms optionally substituted by from one to three fluorine atoms, or is phenyl; R⁹ is hydrogen or methyl; Rⁱ⁰ is hydrogen; and p and q, which may be the same or different, each is zero, one or two.

Another preferred class of compounds of formula (I) are compounds having the formula

- SO₂R⁷

N.

(R% (lb) wherein R, R‘, R², R⁷, and n have the meanings set forth above.

A further preferred class of compounds of formula (lb) are those wherein R is hydrogen; R¹ is ethyl or cvciopropyl; R² is halogen: n is one or two; and R⁷ is methyl, ethyl or -NMe,.

Another preferred class of compounds of formula (I) are those having the formula

AP/P/ 97 / 0 1 0 2 3 (Ic) wherein X is oxygen or -S(O)„-; ; is zero or an integer from one to five; and R. R^l, R², R⁷ and n have the meanings set forth above..

A further preferred class of compounds of formula (Ic) are those wherein one of the substituents of the benzoyl ring is in the 2-position.

!

AP. 0 0-6 8 0

Other preferred compounds of formula (Ic) are those wherein the 5- and/or 6-position of the benzoyl ring is unsubstituted. more especially preferred both the 5- and 6-positions are unsubstituted.

A further preferred class of compounds of formula fIc) are those wherein R¹ is a cyciopropyl group; R² is halogen or a group selected from methyl, trifluoromethyl, methoxy and -S(O)_PR⁶; n is two or three; X is -S(O),-; R⁷ is halogen or a group selected from methyl, trifluoromethyl, nitro and -OR⁵; R⁵ is methyl or ethyl; and R⁶ is methyl.

A further preferred class of compounds of formula (I) are those having the formula

wherein:

R¹ is a methyl, ethyl, isopropyl, cyciopropyl or 1-methylcyclopropyl group;

R²² is a chlorine, bromine or fluorine atom, or a straight- or branched-chain alkyl or alkoxy group containing up to four carbon atoms;

R²³ is a hydrogen, chlorine, bromine or fluorine atom; a group selected from R⁵, -CCLR⁵ and -OR⁵; or a straight- or branched-chain alkyl or alkoxy group containing up to four carbon atoms substituted by -OR' :

R²⁴ is -S(O)_PR⁶·.

R⁵ is a straight- or branched- chain alkyl group containing up to four carbon atoms which is optionally substituted by one or more halogen atoms;

R⁶ is a methyl or ethyl group: and

AP/P/ 9 7 / 0 1 0 2 3 p is zero, one or two.

AP. Ο Ο 6 8 Ο

An especially preferred class of compounds of formula (Γ) have the formula

wherein R²³ is chlorine, bromine or trifluoromethyi.

Because of their herbicidal properties, compounds of formula (I) wherein R^l is substituted or unsubstituted cvciopropvl are particularly preferred for use in the herbicidal compositions of the present invention. The following compounds are among the most ' preferred 4-benzoyiisoxazole compounds for use in the present invention: 5-cyclopropyi-4-[2„ Λ chioro-3-ethoxy-4~{ethylsulfonyl)benzoyl]isoxazole: 4-(4-chioro-2-methylsulphonylbenzoyl)5-cyclopropyiisoxazole; 5-cyclopropyi-4-(2-methylsulphonyl-4-trifluoromethyibenzoyi)isoxazole; and 4-(4-bromo-2-methyisulphonylbenzoyl)-5-cyclopropylisoxazole.

2-Cyano-1.3-dione herbicide compounds usefui in the present invention are described in European Patent Publication Nos. 0 496 630 and 0 496 631, the disclosures of which are incorporated herein by reference thereto. Herbicidal 2-cvano-1,3-dione compounds for use in this invention may be prepared by the methods described in the aforementioned patent publications, or by the application and adaptation of known methods used or described in the chemical literature.

Many of the herbicidal 2-cyano-1.3-dione compounds useful in the present invention fall within the general formula

(Π)

AP. Ο Ο 6 8 Ο

W»· wherein:

R⁵⁰ is a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms which may be the same or different; or a cycloalkvl group containing from three to six. carbon atoms which is optionally substituted by one or more groups selected from R⁵⁵ and one or more halogen atoms which may be the same or different;

one of R⁵¹ and R⁵³ is -S(O)rR⁵⁶ and the other of R⁵¹ and R⁵³ is a halogen atom; a hydrogen atom; a straight- or branched-chain alkyl group containing up to six carbon atoms which is substituted by -OR⁵⁵; -R⁵⁵; nitro; cyano; -SR⁵⁵; -OR⁵⁵; -OfCHrisOR⁵⁵; or -COiR⁵⁵;

R⁵* and R⁵⁴, which may be the same or different, each is a halogen atom; a hydrogen ... atom; a straight- or branched-chain alkyl group containing up to six carbon atoms which is substituted by -OR⁵⁵; -R⁵⁵; nitro: cyano: -OR⁵⁵; -O(CH2)_SOR⁵⁵; or -CO^R⁵⁵;

R⁵⁵ and R⁵⁶, which may be the same or different, each is a staight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms which may be the same or different:

s is an integer from 1 to 3; and r is zero. 1 or 2;

and where the compounds exist in enolic tautomeric forms, agriculturally acceptable salts thereof, which possess valuable herbicidal properties.

Compounds of formula (II) may exist in enolic tautomeric forms that may give rise to geometric isomers around the enolic double bond. Furthermore, in certain cases, ±e substituents R³⁰, R^jl, R⁵², R³³. R⁵⁴. R⁵⁵ qnd R⁵⁶ may contribute to optical isomerism and/or stereoisomerism. All such forms are embraced within 2-cvano-l,3-dione compounds useful in the present invention.

This invention embodies a two-pan herbicidal system comprised of (a) a 4benzoylisoxazole or 2-cvano-1.3-dione herbicide as described hereinabove and (b) an effective antidote therefor. It has been found that such antidote compounds can be selected from a wide range of chemical substances that have been found to be effective as herbicide

AP/F/ 9 7 / 0 1 0 2 3

AP . Ο Ο 6 8 Ο antidotes for the above-descnbed 4-benzoyi-isoxazole herbicides. The preferred compositions of this invention may include any one or more of such antidotes with the herbicides. The variety of crops on which the above-described herbicides is useful can be significantly broadened by the use of an antidote to protect one or more crops from injury therefrom and render the composition more selective against weeds. Some of the more important types of antidotes are amides of haioaikanoic acids, aromatic oxime derivatives, thiazole carboxylic acids and derivatives, and 1,8-naphthalic anhydride.

Preferably, the compositions of the present invention comprise an antidotally-effective amount of (i) a compound of the formula

O

Ii r⁷⁰ ^C

(ΠΓ) wherein R⁷⁰ can be selected from the group consisting of haloalkyl; haloalkenyl; alkyl; alkenyl; cvcloalkyl; cvcloalkylalkyl; halogen: hydrogen: carboalkoxy; Nalkenylcarbamylalkyl; N-alkenylcarbamvi; N-alkvl-N-alkynvlcarbamyl; N-alkvl-Nalkynylcarbamylaikyl; N-alkenylcarbamylalkoxvalkyl; N-alkvl-Nalkynyicarbamylalkoxvalkyl; alkynoxv: haloalkoxy; thiocvanatoalkyl; alkenyiaminoalkyl; alkylcarboalkvl; cyanoalkyl: cyanatoalkvl: alkenylaminosuifonalkyl; aikylthioalkvl; haloalkylcarbonyloxyalkvl: alkoxycarboalkvl; haloalkenvlcarbonyioxvalkyl; hydroxvhaloaiky loxy alkyl; hydroxyalkylcarboalkyloxvalkyl; hydroxvalkyl; alkoxysulfonoalkvl·. furvl; thienyl: alkvldithiolenvl; thienalkvl; phenyl; substituted phenyl wherein the substitutents can be selected from halogen, alkyl, haloalkyl, alkoxy, carbamyl, nitro, carboxylic acids and their salts, and haloalkvlcarbamyl; phenvlalkyl; phenylhaloalkvl; phenylalkenvl: substituted phenvlalkenyl wherein the substituents can be selected from halogen, alkyl, alkoxy, and halophenoxv, phenylalkoxv; phenylalkylcarboxyalkvl; phenyicycloaikvl; halophenvialkenoxy. halothiophenylalkvl: halophenoxvalkvl; bicvcloalkyl £2010//6 /d/dV

AP. Ο Ο 6 8 Ο alkenylcarbamylpyridinyl; alkynylcarbamylpyridinyl; dialkenylcarbamylbicycloalkenyl; and aikynylcarbamylbicycloalkenyl;

R⁷¹ and R⁷², which may be the same or different, are selected from the group consisting of alkenyl; haloalkenvl; hydrogen; alkyl; haloalkyl; alkynyl; cyanoalkyl; hydroxyalkyl; hydroxyhaloalkyl: haloalkylcarboxyalkyl; aikylcarboxyalkyl; alkoxycarboxyalkyl; thioalkylcarboxyalkyl; alkoxycarboalkyl; alkylcarbamyloxyalkyl; amino; formyl; haloalkyl-N-alkylamido; haloalkvlamido; haloalkylamidoalkyl; haloalkyl-Nalkylamidoalkyl; haloalkylamidoalkenyl; alkylimino; cycloalkyl; alkylcycloalkyl; alkoxyalkvl; alkylsulfonyioxyalkyl; mercaptoalkyl; alkvlaminoalkyl; alkoxycarboalkenyl; haloaikylcarbonyl; alkyicarbonyl: alkenylcarbamvloxyalkyl; cycloalkylcarbamyloxyalkyl; alkoxycarbonyl; haloalkoxycarbonvl; halophenylcarbamyloxyalkyl; cycloalkenyl; phenyl;

ri substituted phenyl wherein said substitutents can be selected from alkyl, halogen, haloalkyl, alkoxy, haloalkvlamido, phthalamido. hydroxy, alkvicarbamyloxy, alkenylcarbamyloxy,

J alkvlamido. haloalkvlamido and alkylcarboaikenvl; phenylsulfonyl; substituted phenylalkyl wherein said substituents can be selected from halogen or alkyl; dioxvalkylene; halophenoxyaikylamido-aikyl: aikyithiodiazoiyl; piperidyl; piperidylalkyl; dioxolanylalkyi; thiazolyl; aikylthiazolyl; benzothiazolyl; haiobenzothiazolyl; furyl; alkyl-substituted furyl; furvlalkyl; pyridyl; alkylpyridyl: alkoxazolvl; tetrahydrofurylalkvl; 3-cyano- thienyl; alkyl substituted thienyl; 4.5-polyalkvlene thienyl; a- haloalkvlacetamidophenylalkyl; ahaloalkylacetamidonitrophenylalkyl; oc-haioalkylacetamidohalophenylalkyl; and cyanoaikenyi; or

R⁷¹ and R'² when taken together can form a structure consisting of piperidinyl; alkylpiperidinvl; pyridyl; di- or tetrahydropyridinyi: alkvltetrahydropyridyl; morpholyl; azabicvclononvl; diazacycloalkanvl; benzoalkvlpyrrolidinyl: oxazolidinvl; perhydrooxazolidinvi; aikvloxazolidinyl; furvloxazolidinvl; thienyioxazolidinyl: pyridyloxazolidinyl; pyrimidinvloxazolidinyl: benzooxazolidinvl; C3.7 spirocycloalkvloxazolidinvl: alkylaminoalkenyl: alkylideneimino: pyrrolidinyl; piperidonvl; perhydroazepinvl; perhydroazocinvl; pyrazoiyl: dihvdropyrazolyl; piperazmvl; perhydro-1,4diazepinvl; quinolinvl; isoquinoiinyl; dihvdro-. tetrahvdro- or perhydroquinolyl or

AP/P/ 9 7 / 0 1 0 2 3

AP.00680 isoquinolyl; indolyl or di- or perhvdroindolvl; and which combined R⁷¹ and R⁷² members can be substituted with those independent R'¹ and R⁷² radicals enumerated above; or (ii) one of the following compounds:

a-[(cyanomethoxy )imuio jbenzeneacetonitrile;

ot-(( 1,3-dioxolan-2-ylmethoxy liminoj-benzeneacetonitrile;

O-[3-dioxolan-2-ylmethyl]-2.2.2-trifluoromethyl-4’-chloroacetophenone oxime;

benzenemethamine. N-{4-(dichioromethvlene)-1,3 -diotholan-2-ylidene]-amethvl, hydrochloride:

diphenylmethoxv acetic acid, methyl ester,

1,8-naphthalic anhydride:

cloquintocet;

4,6-dichloro-2-phenyipyrimidine;

2-chloro-N-[ 1-(2. 4. 6-trimethylphenyl)ethenyl]acetamide: and ethylene glycol acetal of 1.1-dichloroacetone.

Antidotal amides of haloalkanoic acids of formula (HI), which include those in which the nitrogen forms a portion of a heterocyclic ring with substituents, are described in a number of publications such as U.S. Patents Nos. 4.021.224, 4,256.481, 4,294,764, and 5,201,933 and British Patent 1,521,540. U.S. Patent No. 4.021.224 contains a broad disclosure of such types of compounds and indicates a great many possibilities for mono- or di-substitution on the nitrogen atom.

One group of preferred antidotal compounds includes those according to formula (ΕΠ') wherein R⁷⁰ is C,_3 haloalkyl, R'¹ and R¹' are independently Ci-j alkenyl or haloalkenyl or 2.3-dioxolan-2-yl-methvl and R'¹ and R when combined form a Cj.io saturated or unsaturated heterocyclic ring containing O. S and/or N atoms and which mav be substituted with Ci.5 alkyl, haloalkyl, alkoxy, aikoxyalky! or haloacvl groups. The preferred haloalkvl R⁷⁰

AP/P/ 97 / 0 1 0 2 3

Wf>·*

AP. ο ο 6 8 Ο member in formula (ΠΓ) is dichioromethyl. Preferred species in this group of antidotal compounds are N.N-diallyl-dichloroacetamide and N-(2-propenyl)-N-(l,3-dioxolanylmethyi)dichioroacetamide.

Still more preferred antidotal compounds according to formula (ΠΓ) is a group of substituted 1,3-oxazolidinyl or thiazolidinyl dichloroacetamides having the formula ,75.

^{R R74}l

CHCI?

R (IV) f,- ί wherein '«irf '

J) Y is oxygen or sulfur;

R'³, R'⁴, R⁷³. R'⁶. R'⁷ and R'⁸ are independently hydrogen; C_t_j alkyl, alkvlol, haloalkyl or alkoxy; Ci.6 alkoxvalkyl; C|_i alkvlthio(CM)alkyl; C_t^ alkylsulfonylme±vi; a bicyciic hydrocarbon radical having up to 10 carbon atoms; phenyl; or a saturated or unsaturated heterocyclic radical having Clio ring atoms and containing O. S and/or N atom(s); wherein the phenyl and heterocyclic radicals are optionally substituted with one or more Ci^ alkyl, C|_i haloalkyl, alkoxy, Ci.6 alkoxvalkyl, halogen or nitro radicals; or R'³and R⁷⁴ together with the carbon atom to which they are attached form a C3.7 spirocvcloalkvl group optionally substituted by one or two methyl groups.

k· cr

I Vi'

Preferred members according to formula (IV) are those wherein R'⁶, R'⁷ and R⁷⁸ are hydrogen: R'³ is hydrogen, methyl, phenyl or a heterocyclic radical; and R'³ and R'⁴ are independently methyl or trifluoromethyl, or when taken together with the carbon atom to which they are attached form a C5 or C₆ cvcloalkyl radical.

Oxime derivatives which are suitable for use as antidotes with herbicides are disclosed, for instance, in U.S. Patents Nos. 4.070.389 and 4.269.775 and have the general formula * o

AP.00680

CN \

_zC= NOCH₂R⁹¹Ar in which Ar is a phenyl or substituted phenyl radical where the substituents are optionally methyl, methoxy, chlorine, cyano or trifluoromethyl, or Ar is a naphthyl radical:

R⁹¹ is cyano,

OR — CN \

O

II —cnhnh₂

ORb —CN(Re)(R_d), O or -CN(R_g)(Rh). where R_a and Rb are independently lower alkyl or together with the carbon form an oxygen or sulfur containing 5 - or 6- membered heterocyclic ring which is unsubstituted or substituted by lower alkvl, halogen and/or nitro; (RJ and (R<j) are independently hydrogen, lower alkyl, cycloalkyl, which are unsubstituted or further substituted with one or more halogen, lower alkoxy and/or cyano; (R_g) and (Rb) together with the nitrogen form a 5- or 6-membered ring which is unsubstituted or mono- or polysubstituted by halogen, cyano and/or lower alkyl and which can be interrupted by a nitrogen, oxygen or sulfur atom. Representative compounds of this type are those in which R⁹¹ is cyano. and in which R⁹¹ is l,3-dioxolan-2-vl. The latter compound has the chemical name 0-(2-(1,3dioxolanyl)methyl]-alpha-cvanobenzaldoxime.

Thiazole carboxylic acids and derivatives suitable for use as antidotes are disclosed generally in U.S. Patent No. 4,199.506. and have the general formula

O

R⁹² 'c=cr (O)„n³ ι t N._C.S

R⁹⁴ in which R⁹² is alkyl, haloalkyl or tnalkoxvmethyl; R⁹³ is variously hydrogen, agriculturally acceptable cations or various hydrocarbyl or substituted hydrocarbyl moieties: vv is 0 or 1: and R⁹⁴ is chloro, bromo, iodo, lower alkoxy or substituted or unsubstituted phenoxy. A

AP/P/ 97/01023

AP . Ο Ο 6 8 Ο representative member of this class is the compound benzyl-2-chloro-4-trifluoromethylmethyl-5-thiazole carboxylate (R⁹² = trifluoromethyl: R⁹³ = benzyl, R⁹⁴ = chloro; w = 1).

Another useful herbicide antidote compound is disclosed in European Patent No. 0104495 as having the formula _R96 (CH₂)_n-COOR⁹⁷

R⁹⁸ 'w' wherein R⁹⁸ is C|-Cj haloalkyl containing from 1 to 3 halogen atoms or a phenyl group optionally substituted; R⁹⁶ represents a hydrogen atom, a methyl or a phenyl; R⁹⁷ represents a hydrogen atom, a methyl or a phenyl; R⁹⁷ represents a C|-Cg alkyl group, a C5-C6 cycloalkyl group, a cyclohexyimethyl group, a phenyl group optionally substituted, a benzyl group optionally substituted, an allyl or propargyl group; and n is zero or one.

A representative antidote of that group would be:

N CH2COOCH3

A

O CH₂C1

Especially preferred antidotes for use in the present invention include: 2,2,5-trimethvlN-dichloroacetvl oxazolidine: 2.2-dimethyl-5-phenvl- N-dichloroacetyl oxazolidine: 2,2dimethvi-5-(2-furanvl)-N-dichloroacetyl oxazolidine: 2.2-dimethyi-5-(2-thienyl)- Ndichloroacervl oxazolidine: N.N-diallyl dichloroacetamide; 2,2-spirocyclohexv-Ndichloroacervl oxazolidine: 2.2-dimethvl-N-dichloroacetyl oxazolidine: 4-(dichloroacetvl)3,4-dihydro-3-methy 1-27/- 1.4-benzoxazine: 3-[3-(dichloroacetyl)-2.2-dimethvl-5oxalidinyljpvndine; 4-(dichloroacetyl)-l-oxa-4-azapiro-(4,5)-decane: 2,2-dichloro-1-(1, 2. 3. 4-tetrahvdro- l-methvl-2-isoquinolyl)ethanone; cis/trans-1,4-bis(dichloroacetyl)-2. 5dimethvlpiperazine: N-(dichloroacetvl)-l, 2, 3, 4-tetrahvdroquinaldine; 1,5bist dichloroacetvl)- 1. 5-diazacvclononane: 1 -(dichloroacetvl)- l-azaspiro(4,4]nonane: a£2010//6 Zd/dV

V

AP.00680 [(cyanomethoxyjiminojbenzeneacetonitrile·. a-{(l,3-dioxolan-2ylmethoxyjiminojbenzeneacetonitrile; 0-[l,3-dioxolan-2-ylmethyl]-2.2.2-trifluon>methyl-4’chloroacetophenone oxime; benzenemethamine, N-[4-(dichloromethylene)-l,3-diotholan-2ylidene]-a-methyl; hydrochlorideidiphenylmethoxy acetic acid, methyl ester, 1,8-naphthalic anhydride;4,6-dichloro-2-phenyipyrimidine; 2-chloro-N-{ 1-(2, 4, 6-trimethylphenyl)ethenyl]acetamide; cloquintocet; and ethylene glycol acetal of 1,1-dichloroacetone.

Herbicidal compositions according to this invention may also contain one or more additional pesticidally active ingredients. Herbicides which may be used as co-herbicides with 4-benzoylisoxazole or 2-cvano-l,3-dione compounds of formula (I) with benefit in combination with an antidote as described herein include, preferably, thiocarbamates (including dithiocarbamates), α-haloacetamides, heterocyclyl phenyl ethers, imidazolinones, ' pyridines and sulfonylureas. it is within the purview of this invention that other classes of J herbicides, e.g., triazines, ureas, diphenyl ethers, nitroanilines, thiazoles, pyrrolidinones, aromatic and heterocyclic di- and triketones, etc., the individual members of which classes may be derivatives having one or more substituents selected from a wide variety of radicals may suitably be used a co-herbicides. Such combinations can be used to obtain selective weed control with low crop injury in several varieties of crop plants such as com, grain sorghum, and cereals such as wheat, rice, barley, oats and rye. as well as several varieties of oil-seed crops such as soybeans and cotton. Insecticides, such as synthetic pvrethroids, and fungicides, such as carbamates and triazoles, may also be included in the herbicidal compositions of this invention.

(( Effective weed control coupled with low crop injury is a result of treatment of a plant locus with a combination of an herbicidal 4-benzoylisoxazole or 2-cyano-l,3-dione compound and an antidote compound in accordance with the present invention. By application to the “plant locus is meant application to the plant growing medium, such as soil, as well as to the seeds, emerging seedlings, roots, stems, leaves, or other plant parts.

The phrase “combination of an herbicidal 4-benzovlisoxazoie or 2-cvano-l,3-dione compound and an antidote compound includes various methods of treatment. For example, the soil of a plant locus may be treated with a tank-mix” composition containing a mixture of the herbicide and the antidote which is in combination. Or, the soil may be treated with

AP/P/ 57 / 0 1 0 2 3

AP. ο Ο 6 8 Ο the herbicide and antidote compounds separately so that the “combination” is made on, or in. the soil. After such treatments if the soil with a mixture of herbicide and antidote or by separate or sequential application of the herbicide and the antidote to the soil, the herbicide and antidote may be mixed into or incorporated into the soil either by mechanical mixing of the soil with implements or by “watering in” by rainfall or irrigation. The soil of a plant locus may aiso be treated with antidote by application of the antidote in a dispersible-concentrate form such as a granule. The granule may be applied to a furrow which is prepared for receipt of the crop seed and the herbicide may be applied to the plant locus either before or after infurrow placement of the antidote-containing granule so that the herbicide and antidote form a “combination.” Crop seed may be treated or coated with the antidote compound either while the crop seed is in-furrow just after seeding or. more commonly, the crop seed may be treated or coated with antidote prior to seeding into a furrow. The herbicide may be applied to the soil piant locus before or after seeding and a “combination” is made when both herbicide and an antidote-coated seed are in the soil. Also contemplated as a “combination is a commerciallv-convenient association or presentation of herbicide and antidote. For example, the herbicide and antidote components in concentrated form may be contained in separate containers, but such containers may be presented for sale or sold together as a “combination.” Or, the herbicide and antidote components in concentrated form may be in a mixture in a single container as a “combination.” Either such a “combination” may be diluted or mixed with adjuvants suitable for soil applications. Another example of a commercially-presented combination is a container of antidote-coated crop seed sole, or presented for sale, along with a container of herbicide material. These containers may. or may not. be physically attached to each other, but nonetheless constitute a “combination of herbicide and antidote” when intended for use ultimately in the same plant locus.

In the foregoing description of various modes of application of the herbicide-antidote combinations, it is inherent that each form of application requires that in some manner, the herbicide and antidote will physically combine to form a “composition of those agents.

The amount of a particular 4-benzoyiisoxazole or 2-cyano-1,3-dione herbicide to be applied to the plant locus or crop-growing area will vary with, inter alia, the nature of the weeds, the particular herbicide used, the time of application, the climate and the nature of the crop. Application rates of between about 0.01 kg/ha and 5.0 kg/ha of 4-benzoviisoxazole or 2AP/P/ 97 7 0 1 0 2 X

AP.0 0 68 0 * « cyano- 1,3-dione herbicide are generally suitable, with a rate of about 0.01 kg/ha to 4.0 kg/ha being preferred, and about 0.01 kg/ha to 2.0 kg/ha being especially preferred.

The amount of a given antidote to be utilized in combination with the herbicide according to this invention and the manner of its utilization and resulting efficacy can vary according to various parameters, such as the particular antidote to be employed, the crop which is to be protected, the amount or rate of herbicide to be applied, and the soil and climatic conditions of the agricultural environment in which the combination is to be applied. The selection of a specific antidote for use in the herbicide composition, the manner in which it is to be applied (e.g., tank-mix, in-furrow application, seed treatment, etc.), the determination of activity which is non-phytotoxic but antidotally-effective, and the amount necessary to provide this result, can be readily performed utilizing the test procedures in the cited patents, such as U.S. Patent No. 4,021,224, in accordance with common practice in the art.

For other descriptions of antidotes and methods of their use, reference is made to U.S. Patent No. 3,959,304; U.S. Patent No. 3,989,503; U.S. Patent No. 3,131,509; U.S. Patent No. 3,564,768; U.S. Patent No. 4,137,070; U.S. Patent No. 4,294,764; U.S. Patent No. 4,256,481; U.S. Patent No. 4,415,353; U.S. Patent No. 4,415,352; and WO International Publication No. WO 92/10095.

The antidote is applied in combination with the herbicide in a non-phytotoxic antidotally effective amount. By “non-phytotoxic” is meant an amount of the antidote which causes at most minor or no injury to the desired crop species. By “antidotally-effective” is meant an antidote used in an amount which is effective as an antidote with the herbicide to decrease the extent of injury caused by the herbicide to the desired crop species.

The ratio of herbicide to antidote may vary depending upon the crop to be protected, weed to be inhibited, herbicide used, etc., but normally an herbicide-to-antidote ratio ranging from 1:25 to 60; 1 parts by weight may be employed, although much higher rates of antidote may be used, e.g., 1:100 to 1:300 parts by weight of herbicide to-antidote. The preferred weight ratio of herbicide-to-antidote is from about 1:10 to about 30:1. Another preferred weight ratio range is from about 1:1 to about 20:1, with an even more preferred weight ratio range being from about 2:1 to about 15:1.

AP/P/ 97 / 0 1 0 2 3

AP .0 0 6 8 0

In fieid applications, the herbicide, antidote, or a mixture thereof, may be applied to the plant locus without any adjuvants other than a solvent. Usually, the herbicide, antidote, or mixture thereof, is applied in conjunction with one or more adjuvants in liquid or solid form. Compositions or formulations containing mixtures of an appropriate herbicide and antidote usually are prepared by admixing the herbicide and antidote with one or more adjuvants such as diluents, solvents, extenders, carriers, conditioning agents, water, wetting agents, dispersing agents, or emulsifying agents, or any suitable combination of these adjuvants These mixtures can be in the form of particulate solids, granules, pellets, wettable powders, dusts, solutions, aqueous dispersions, or emulsions.

Application of the herbicide, antidote, or mixture thereof, can be carried out by conventional techniques utilizing, for example, hand-carried or tractor-mounted spreaders, power dusters, boom and hand sprayers, spray dusters, and granular applicators. If desired, application of the compositions of the invention to plants can be accomplished by incorporating the compositions in the soil or other media.

The following examples are for illustrative purposes only and are not intended as necessarily representative of the overall testing performed and are not intended to limit the invention in any way. As one skilled in the art is aware, in herbicidal testing, a significant number of factors that are not readily controllable can affect the results of individual tests and render them non-reproducible. For example, the results may vary depending on environmental factors, such as amount of sunlight and water, soil type, pH of the soil, temperature, and humidity, among other factors. Also, the depth of planting, the application rate of the herbicide, the application rate of the antidote, and the ratio of the herbicide-toantidote application, as weil as the nature of crops being tested, can affect the results of the test. Results may vary from crop to crop within the crop varieties.

EXAMPLES

The herbicide compound 5-cyclopropyl-4-[2-chioro-3-ethoxy-4(ethylsulphonyDbenzovlj-isoxazole (“Herbicide”) and the antidote compound 2,2,5-trimeihylN-dichloroacetyi oxazolidine i“Safener'”l were applied (at the rates listed in Table 1 below) preemergence to aluminum flats (measuring 9 wide x 20 long x 7 cm deep) containing pasteurized, sandy loam soil in which the following species had been sown: Ipomoea hederacea (ivy leaf momingglorv) (“IPOHE); Seiana faberi (giant foxtail) (“SETFA);

AP/P/ 97 / 0 1 0 2 3

V

AP. Ο Ο 6 8 Ο

Triiicum aestivum ‘Prinqual’ (“Wheat'’); Oryza sativa ‘Katy’ (Rice”); Zea mays ‘Garst 8940’ (com) (“Com GA8940”); and Zea mays ‘Garst 8532’ (com) (Com GA8532”). The soil was fortified with fertilizer (10-10-10) prior to seeding. All of the compounds applied were technical grade materials. The compounds were dissolved in 50/50 acetone/water solution and applied with a carrier volume of 200 L/ha. All treatments were replicated two times.

After application, flats were placed in a greenhouse and maintained under good growing conditions. Injury to plants was evaluated 20 days after treatment (“DAT”). Injury was evaluated as percent control, with percent control being the total injury to the plants due to all factors including: inhibited emergence, stunting, malformation, albinism, chlorosis, and other types of plant injury. The control ratings range from 0 to 100 percent, where 0% represents no effect with growth equal to the untreated control and where 100% represents complete kill.

The results observed are summarized in Table 1 below.

TABLE 1

Herbicide (9/ha)	Safener (g/ha)	IPOHE	SETFA	SORVU	Rice	Wheat	Corn GA8940	Corn GA8532
125	0	90 j	95	98	75	0	3	3
250	0	98	100	99	78	0	53	45
500	0	100	100	100	85	0	85	85
125	250	93	93	95	70	0	0	0
250	250	98	99	100	85	0	0	0
500	250	100	100	98	90	10	8	18

A?/P/ 9 7 / 0 1 0 2 3

Although the invention has been described with reference to preferred embodiments and examples thereof, the scope of the present invention is not limited only to those described embodiments. As will be apparent to persons skilled in the an, modifications and adaptations to the above-described invention can be made without depaning from the spirit and scope of the invention, which is defined and circumscribed by the appended claims.

Claims

WHAT IS CLAIMED IS: ««xrtainfd cry/ntfr sai-a invciifrftA a*rtd tit wins m-jftmer the carat is to' be ρέ/ΙότΑβίτ «SaHaire that what l lv>i efalMV tt’ -2

1. An herbicidal composition comprising:

(a) an herbicidallv effective amount of an herbicidal 4-benzoylisoxazole or 2-cyano1,3-dione compound, or an agriculturally acceptable salt thereof; and (b) an antidotally effective amount of an antidote compound which is antidotally effective for said 4-benzovlisoxazole or 2-cyano-1.3-dione.
2. An herbicidal composition according to claim 1, wherein component (a) is a 4benzovlisoxazole of the formula (I) wherein,

R represents a hydrogen atom; a halogen atom: a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms: a cvcloalkvl group containing from 3 to 6 carbon atoms optionally substituted by one or more groups -R⁵. one or more halogen atoms or a group CChR³; or a group selected from -CO?R³, -COR⁵, cyano, nitro, or -CONR³R⁴;

R¹ represents a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; or a cvcloalkvl group containing from three to six carbon atoms optionally substituted by one or more groups R⁵ or one or more halogen atoms:

R² represents a halogen atom: a straight- or branched-chain alkyl, alkenyl, alkynyl or alkoxy group containing up to six carbon atoms which is optionally substituted by one or more groups -OR⁵ or one or more halogen atoms: or a group selected from nitro, cyano, CO?R³, -SfOjpR⁶, -O(CHi)mOR⁵. -COR⁵. -NR⁶¹R⁶². -NfR^SOnR⁷, -OR⁵, -OSO2R⁷, SO₂NR³R⁴. -CONR³R⁴. -CSNR³R⁴ and -(CR⁹R^l0),-S(O),R⁷;

A?/P/ 9 7 / 0 1 0 2 3 on nil AP. 0 0 6 β 0 n represents an integer from one to five; when n is greater than one, the groups R² may be the same or different;

R³ and R⁴ each independently represents a hydrogen atom; or a straight- or branchedchain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

R⁵ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; a straight- or branchedchain alkenyl or alkynyl group containing from three to six carbon atoms which is optionally substituted by one or more halogen atoms; or phenyl optionally substituted by from one to Five groups R² which may be the same or different;

R⁶, R⁶¹ and R⁶², which may be the same or different, each represents a straight- or .J branched-chain alkyl group containing up to six carbon atoms which is optionally substituted j by one or more halogen atoms; or phenyl optionally substituted by from one to five groups R²which may be the same or different;

R⁷ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; phenyl optionally substituted by from one to five groups R² which may be the same or different; or a halogen atom;

o

R represents a hydrogen atom: a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to ten carbon atoms which is optionally substituted by one or more halogen atoms; a cvcloalkyl group containing from three to six carbon atoms; phenyl optionally substituted by from one to five groups which may be the same or different selected from halogen, nitro, cyano, R³, -S(O)_PR⁵ and -OR³: or a group selected from -SOiR⁶ and OR⁵;

R⁹ and R¹⁰, which may be the same or different, each represents a hydrogen atom; a straight- or branched-chain aikvl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms: or phenyl optionally substituted by from one to five groups R² which may be the same or different:

R⁵' and R⁵', which may be the same or different, each represents a hydrogen atom: or a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

AP/P/ 97 / 0 1 0 2 3 *·

AP . Ο Ο 6 8 Ο ρ represents zero, one or two; q represents zero, one or two; m represents one, two or three;

r represents an integer from one to four; when r is greater than one the groups -CR⁹R¹⁰- may be the same or different:

or an agriculturally acceptable salt thereof which possesses herbicidal properties.
3. An herbicidal composition according to claim 1, wherein component (a) is a 2-cyano1,3-dione of the formula wherein:

R⁵⁰ is a straight- or branched-chain alkvi group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms which may be the same or different: or a cycloalkyl group containing from three to six carbon atoms which is optionally substituted by one or more groups selected from R⁵⁵ and one or more halogen atoms which may be the same or different;

one of R⁵¹ and R⁵³ is -S(O),R⁵⁶ and the other of R⁵¹ and R⁵³ is a halogen atom; a hydrogen atom: a straight- or branched-chain alkyl group containing up to six carbon atoms which is substituted by -OR⁵⁵; -R⁵⁵: nitro: cyano: -SR⁵⁵; -OR⁵⁵; -O(CH2)SOR⁵⁵; or -CO2R⁵⁵;

R⁵ and R⁵⁴, which may be the same or different, each is a halosen atom; a hvdrogen atom: a straight- or branched-chain alkyl group containing up to six carbon atoms which is substituted by -OR⁵⁵; -R⁵⁵; ηίσο; cyano; -OR⁵⁵; -O(CH2)SOR⁵⁵; or -CO2R⁵⁵;

R⁵⁵ and R⁵⁶, which may be the same or different, each is a staight- or branched-chain alkvi group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms which may be the same or different:

Ϊ C 0 t 0 / L 6 /d/dV

AP.00680 s is an integer from 1 to 3 ; and ris zero, 1 or 2;

or an agriculturally acceptable salt thereof.
4. An herbicidal composition according to claim 1 wherein component (b) is (i) a compound of the formula o

II c

Ν' (HD

J wherein R⁷⁰ is selected from the group consisting of haloalkyl; haloalkenyl; alkyl; alkenyl; cycioalkvl; cycloalkylalkyl; halogen; hydrogen; carboalkoxy; N-alkenvlcarbamylalkyl; Nalkenylcarbamyl: N-alkyl-N-alkynyicarbamvl; N-alkvl-N-alkynylcarbamylalkyl; Naikenylcarbamylalkoxyalkyl; N-alkyl-N-alkynvlcarbamylalkoxyalkyl; alkynoxy; haloalkoxy; thiocyanatoaikvl; alkenvlaminoalkyl; alkylcarboalkvl; cyanoalkyl; cvanatoalkyl; alkenyl aminosulfonaikyl; alkylthioalkvi; haloalkylcarbonyloxvalkyl; alkoxycarboaikyl; haloalkenyicarbonyloxvaikyl; hydroxyhaloalkvloxyalkyl; hvdroxyalkylcarboalkyloxvalkyl; hydroxy alkyl; alkoxysulfonoalkvl; furyl; thienyl; alkvldithiolenyl; thienaikvl; phenyl; substituted phenyl wherein the substitutents can be selected from halogen, alkyl, haloalkyl. alkoxy, carbamvl, nitro, carboxylic acids and their salts, and haloalkylcarbamvl; phenylalkvl; phenylhaloalkyl; phenylalkenvl; substituted phenvlalkenyl wherein the substituents can be selected from halogen, alkyl, alkoxy, and halophenoxy, phenylalkoxy;

phenylalkylcarboxvalkyl; phenylcycloalkvl; halophenylalkenoxv; halothiophenvlalkvl; halophenoxy alkvl; bicycloalkvl; alkenylcarbamylpyridinyl; alkvnvlcarbamvlpvridinyl; dialkenylcarbamylbicycloalkenyl: and aikynylcarbamylbicycloalkenvl;

R and R'. which may be the same or different, are selected from the group consisting of alkenyl; haloalkenyl: hydrogen: alkyl; haloalkyl; alkynyl; cyanoalkyl; hydroxvalkyl; hydroxvhaloaikyl: haloalkylcarboxyalkyl: alkylcarboxvalkyl; alkoxycarboxvalkyl: thioalkvIcarboxyalkyl; alkoxycarboaikyl; alkylcarbamyloxyaikyl: amino: formyl; haloalkyl-N-alkvlamido: haloalkviamido: haloalkylamidoalkvl; haloalkvl-Nalkyiamidoalkyl; haloalkylamidoalkenvl; alkvlimino: cycioalkvl: alkylcvcloalkyl; alkoxvalkyl

AP/P/ 9 7 / 0 1 0 2 3

AP . Ο Ο 6 8 Ο

Μ/ alkylsulfonyloxyalkyl; mcrcaptoalkyl; alkylaminoalkyl; alkoxycarboaikenyl; haloalkylcarbonyl; alkylcarbonvl; alkenylcarbamyloxyalkyl; cycioalkylcarbamyloxyalkyl; alkoxycarbonyl; haloaikoxycarbonyl; halophenylcarbamyloxyalkyl; cycloaikenyl; phenyl; substituted phenyl wherein said substitutents can be selected from alkyl, halogen, haloalkyl, alkoxy, haloalkylamido, phthalamido, hydroxy, alkylcarbamyioxy, alkenylcarbamyloxy, alkylamido, haloalkylamido and alkylcarboalkenyl; phenylsulfonyl; substituted phenylalkyl wherein said substituents can be selected from halogen or alkyl; dioxyalkylene; halophenoxyalkylamido-alkvl; aikylthiodiazoiyl; piperidyl; piperidvlalkyl; dioxolanylalkyl; thiazolyl; alkylthiazolyl; benzothiazolvl; halobenzothiazolyl; furyl; alkyl-substituted furyl; furvlalkyl; pyridyl; alkylpyridyl; alkoxazolvl; tetrahydrofurylalkyl; 3-cyano- thienyl; alkyl substituted thienyl; A5-polyalkviene thienyl; a- haloalkylacetamidophenyialkyl; a>r._;< haloalkylacetamidonitrophenyialkyl; α-haloalkylacetamidohalophenylalkyl; and cvanoalkenyl; or

R⁷¹ and R⁷² taken together form a structure consisting of piperidinyl; alkyipiperidinyl; pyridyl; di- or tetrahydropyridinyl; alkvltetrahydropyridyl; morphoiyl; azabicyclononyl; diazacycioalkanyl; benzoaikylpyrrolidinyl; oxazolidinyl; perhydrooxazolidinyl; alkvloxazolidinyl; furyloxazolidinvl; thienyloxazolidinyl; pyridyloxazolidinyl; pyrimidinyloxazoiidinyl; benzooxazolidinyi; C3.7 spirocycloaikvl-oxazolidinyl; alkylaminoalkenvl; alkvlideneimino; pyrrolidinyl; piperidonyl; perhydroazepinyi; perhydroazocinyl; pyrazolyl; dihvdropyrazolyl; piperazinyl·, perhydro-1,4-diazepinyi; quinolinyl; isoquinolinyl; dihvdro-, tetrahvdro- or perhydroquinolyl or isoquinolyl; indolyl or di- or perhvdroindolyl; and which combined R'¹ and R⁷² members can be substituted with those independent R⁷¹ and R'² radicals enumerated above; or (ii) a compound selected from the group consisting of:

a-[(cyanomethoxy)imino]benzeneacetonitrile; a-(( 1,3-dioxoian-2-ylmethoxyhmmo]-benzeneacetonitrile; O-[3-dioxolan-2-ylmethyi]-2.2.2-trifluoromethyl-4’ -chloroacetophenone oxime;

benzenemetharmne. N-[4-(dichloromethvlene)-1,3-diotholan-2-ylidene[-amethvl. hydrochloride; diphenvlmethoxv acetic acid, methyl ester;

ΔΡ/Ρ/ &7/G1Q2 3

AP. ο Ο 6 8 Ο

1,8-naphthalic anhydride;

4,6-dichioro-2-phenylpyrimidine;

cloquintocet;

2-chJoro-N-( 1-(2, 4, 6-trimethylphenyl)ethenyl]acetamide: and ethylene glycol acetal of 1,1 -dichloroacetone.
5. An herbicidal composition according to claim 4, wherein component (b) is selected from the group consisting of 2,2,5-trimethyl-N-dichioroacetyi oxazolidine; 2j2-dimethyl-5phenyl- N-dichloroacetyl oxazolidine; 2,2-dimethyl-5-(2-furanyl)-N-dichloroacetyl oxazolidine; 2,2-dimethyl-5-(2-thienyl)- N-dichloroacetyl oxazolidine: N,N-diailyl dichloroacetamide; 2,2-spirocyciohexy-N-dichloroacetyi oxazolidine; 2,2-dimethyl-Ndichioroacetyl oxazolidine: 4-(dichloroacetyi)-3,4-dihydro-3-methyl-2if-l,4-benzoxaxine; 3[3-(dichioroacetyl)-2,2-dimethyl-5-oxaiidinyl]pyridine; 4-(dichloroacetyl)-l-oxa-4-azapiro(4,5)-decane; 2.2-dichloro-1-(1, 2. 3, 4-tetrahvdro-l-methyl-2-isoquinolyl)ethanone; cis/transl,4-bis(dichloroacetyl)-2. 5-dimethvipiperazine; N-(dichioroacetyl)-l. 2, 3, 4tetrahydroquinaldine: l,5-bis(dichloroacervl)- 1, 5-diazacvclononane: 1-(dichloroacetyl)-1azaspiro[4,4]nonane; a-[(cyanomethoxy)imino]benzeneacetonitrile: α-[( 1,3-dioxolan-2ylmethoxy)imino]benzeneacetonitrile: 0-[l,3-dioxolan-2-ylmethyl]-2,2,2-trifluoromethyl-4’chloroacetophenone oxime; benzenemethamme, N-[4-(dichioromethylene)-l,3-diotholan-2yiidene]-a-methvl; hydrochioride:diphenylmethoxy acetic acid, methyl ester; 1,8-naphthaiic anhydride;4,6-dichloro-2-phenylpynmidine: 2-chioro-N-[ 1-(2, 4, 6-trimethyiphenyl)ethenvl]acetamide: cloquintocet: and ethylene glycol acetal of 1,1-dichioroacetone.
6. An herbicidal composition according to claim 5, wherein component (b) is selected from the group consisting of : 2,2,5-trimethyl-N-dichioroacetyl oxazolidine; 2,2-dimethvl-5phenvl- N-dichloroacetyl oxazolidine; 2,2-dimethyl-5-(2-furanyl)-N-dichioroacetyl oxazolidine; 2,2-dimethyl-5-(2-thienyl)- N-dichloroacetyl oxazolidine; N.N-diallyl dichloroacetamide: 2,2-spirocyclohexy-N-dichloroacetyl oxazolidine; 2,2-dimethvl-Ndichioroacetvl oxazolidine: and 4-(dichloroacetyl)-3,4-dihydro-3-methyl-2//-l,4-benzoxazine.
7. An herbicidal composition according to claim 2. wherein component (a) is a 4benzovlisoxazole of formula (I) in which R¹ is a substituted or unsubstituted svslopropyl group.

AP/P/ 97 / 0 1 0 2 3

AP . Ο Ο 6 8 Ο
8. An herbicidal composition according to claim 7, wherein component (a) is selected from the group consisting of 5-cyclopropyl-4-(2-chloro-3-ethoxy-4(ethvisulfonyl)benzoyl]isoxazoie; 4-(4-chloro-2-methylsulphonylbenzoyi)-5cyclopropylisoxazoie; 5-cyclopropyl-4-(2-methylsulphonyl-4-trifluoromethylbenzoyi)isoxazoie; and 4-<4-bromo-2-methyisulphonyibenzoyi)-5-cyclopropylisoxazole; and agriculturally acceptable salts thereof.
9. An herbicidal composition according to claim 8, wherein component (b) is selected from the group consisting of : 2.2,5-trimethyl-N-dichloroacetyl oxazolidine; 2,2-dimethyl-5phenvi- N-dichloroacetyl oxazolidine; 2.2-dimethyl-5-(2-furanyl)-N-dichloroacetyi oxazolidine; 2,2-dimethyl-5-(2-thienvl)- N-dichloroacetyl oxazolidine; N.N-diallyl dichloroacetamide; 2.2-spirocyclohexy-N-dichloroacetvl oxazolidine; 2,2-dimethyl-Ndichloroacetvl oxazolidine; and 4-idichloroacetyl)-3,4-dihydro-3-methyl-2/i-l,4~benzoxazine.
10. A method of reducing injury to crops by a 4-benzovlisoxazole or 2-cyano-i,3-dione herbicide, which comprises applying to the soil, crop or seed a non-phytotoxic antidotally effective amount of an antidote compound which is antidotally effective for said 4benzoylisoxazole or 2-cvano-1.3-dione herbicide.
11. A method according to claim 10. wherein said antidote compound is:

(i) a compound of the formula

Μ*' £2010//6 /d/dV (ΠΓ) wherein R⁷⁰ is selected from the group consisting of haloalkyi; haioalkenyl; alkyl; alkenyl; cycloalkvl; cycloalkvlalkyl; halogen: hydrogen: carboalkoxy: N-alkenvlcarbamyialkyl; Nalkenylcarbamyl: N-aikyl-N-alkynvlcarbamyl: N-alkyi-N-alkynyicarbamyialkyl; Nalkenyicarbamvlalkoxyalkyl: N-aikyL-N-alkynylcarbamylalkoxyalkyl; alkynoxv; haloalkoxv; thiocvanatoalkyl: alkenylaminoalkvl; alkvlcarboalkyl; cvanoalkvl; cvanatoalkvl; alkenylaminosulfonalkvl; alkylthioalkvl: haloalkylcarbonyloxvalkyl; alkoxycarboalkvl; haioalkenylcarbonvloxyaikyl; hydroxy haloalkyloxvalkyl; hydroxvalkylcarboalky loxy alkyl;

AP.00680 hydroxyalkyi; alkoxysuifonoalkyl; furyl; thienyl; alkyldithiolenyl; thienalkyl; phenyl; substituted phenyl wherein the substitutents can be selected from halogen, alkyl, haloalkyl, alkoxy, carbamyl, nitro, carboxylic acids and their salts, and haloalkylcarbamyl; pbenylalkyl; phenylhaloalkyl; phenylalkenyl; substituted phenylalkenyl wherein the substituents can be selected from halogen, alkyl, alkoxy, and halophenoxy, phenylalkoxy;

phenyialkylcarboxyalkyl; phenylcycloalkyl; halophenylalkenoxy; halothiophenylalkyl; halophenoxy alkyl; bicycioalkyl; alkenylcarbamylpyridinyl; alkynyicarbamyipyridinyl; dialkenylcarbamyibicvcloalkenyl; and alkynylcarbamylbicycloalkenyl;

R⁷' and R⁷², which may be the same or different, are selected from the group consisting of alkenyl; haloalkenyl; hydrogen; alkyl; haloalkyl; alkynyl; cyanoalkyl; hydroxyalkyl; hydroxyhaloalkyl; haloalkylcarboxyaikyl; alkvlcarboxyalkyl;

(: j alkoxycarboxyalkyl; thioalkylcarboxyalkyl; alkoxycarboalkyl; aikylcarbamyloxyalkyl; amino;

«iii-*

.. formyl; haloalkyi-N-alkyiamido: haloalkylamido: haloalkvlamidoalkyl; haloalkyl-Nr •

alkyl amidoalkyl; haloalkvlamidoalkenyl; alkvlimino; cycloalkyl; alkylcycioalkyl; alkoxvalkyl; alkylsulfonyloxyalkvl; mercaptoaikvl; alkyiaminoalkyl; alkoxycarboalkenyl; haloalkylcarbonyl; aikyicarbonyi; alkenvlcarbamyloxyalkyl; cycloaikylcarbamyloxvalkyl; alkoxycarbonvl; haloalkoxvcarbonyl; halophenylcarbamyioxyalkyl; cycloalkenyl; phenyl; substituted phenyl wherein said substitutents can be selected from alkyl, halogen, haloalkyl, alkoxy, haloalkylamido, phthalamido, hydroxy, alkylcarbamyloxy, alkenylcarbamyloxy, aikylamido. haloalkylamido and alkylcarboalkenyl; phenylsulfonyl; substituted phenylalkvl wherein said substituents can be selected from halogen or alkyl; dioxyalkylene; halophenoxy alky 1 ami do-alkyl; alkvlthiodiazolyl; piperidyl; piperidylalkyl; dioxolanylalkyl;

' thiazolyl; alkvlthiazolvl; benzothiazolyl; halobenzothiazolvl; furyl; alkyl-substituted furyl; furylalkyl; pyridyl; aikylpyridyl: alkoxazolvl; tetrahydrofuryialkvl; 3-cvano- thienyl; alkyl substituted thienyl; 4.5-polyalkylene thienyl; a- haloalkylacetamidophenylalkvl; ahaioalkvlacetamidonitrophenylalkyl; cc-haloalkylacetamidohaiophenylalkyl; and cyanoalkenvl; or

R⁷¹ and R'² taken together form a structure consisting of piperidinvl; aikylpiperidinyl: pyridyl; di- or tetrahydropyridinyl; alkyltetrahydropyridvl: morpholyl; azabicyciononvl; diazacvcloalkanvl; benzoalkylpyrrolidinvl: oxazolidinyl: perhydrooxazolidinvl; alkvloxazolidinyl; furvloxazolidinyi: thienyloxazolidinvl; pyridyloxazolidinvl;

AP/P/ 9 7 / 0 1 0 2 3

AP. Ο Ο β 8 Ο pynmidinyloxazoiidinyl; benzooxazolidinyl; C3.7 spirocycloalky 1-oxazolidinyl; alkylaminoalkenyl; alkylideneimino; pyrrolidinyl; piperidonyl; perhydroazepinyl; perhydroazocinyl; pyrazolyl; dihydropyrazolyl; piperazinyl; perhydro-1,4-diazepinyl; quinoiinyl; isoquinolinyl; dihydro-, tetrahydro- or perhydroquinoiyl or isoquinolyl; indolyl or di- or perhydroindoiyl; and which combined R'¹ and R⁷² members can be substituted with those independent R⁷' and R'² radicals enumerated above; or (ii) a compound selected from the group consisting of:

a-[(cyanomethoxy)imino]benzeneacetoni trile;

a-[( 1,3-dioxolan-2-ylmethoxy)imino]-benzeneacetonitrile;

O-[3-dioxolan-2-ylmethyl]-2.2,2-trifluoromethyl-4’-chloroacetophenone oxime;

benzenemethamine, N-[4-(dichloromethylene)-l,3-diotholan-2-ylidene]-a/ methyl, hydrochloride:

diphenyl methoxy acetic acid, methyl ester;

1,8-naphthalic anhydride;

4,6-dichloro-2-phenylpvrimidine;

cloquintocet;

2-chloro-N-[ 1-(2, 4, 6-tnmethylphenvl)ethenyl]acetamide: and ethylene glycol acetal of 1,1-dichloroacetone.
12. A method according to claim 11, wherein said antidote compound is selected from the group consisting of 2,2,5-trimethyl-N-dichloroacetyl oxazolidine; 2.2-dimethvl-5-phenyl- N- dichloroacetvl oxazolidine; 2,2-dimethyi-5-(2-furanyl)-N-dichioroacetyl oxazolidine; 2,2dimethvl-5-(2-thienyl)- N-dichloroacetyl oxazolidine; N.N-diallvl dichloroacetamide; 2,2spirocyclohexy-N-dichloroacervl oxazolidine; 2.2-dimethyl-N-dichloroaceryl oxazolidine; 4(dichloroacetyl)-3,4-dihydro-3-methyl-2/Y-1,4-benzoxazine; 3-[3-(dichloroacetyl)-2,2dimethyl-5-oxaiidinyl]pyridine; 4-(dichloroacetvl)-1 -oxa-4-azapiro-(4,5)-decane; 2,2dichioro-1 -(1, 2, 3, 4-tetrahvdro- l-methyl-2-isoquinolvi)ethanone; cis/trans-1.4bisl dichloroacetvl)-?, 5-dimethvlpiperazine: N-(dichloroacetyl)-l, 2, 3, 4tetrahydroqumaidine: 1,5-bis( dichloroacetvl)- 1,5-diazacvclononane; 1-(dichloroacetyl)-1azaspiro(4.4]nonane: a-[(cyanomethoxy)imino]benzeneacetonitrile: α-[( 1,3-dloxolan-2ylmethoxy)imino]benzeneacetonitrile: O-[ 1.3-dioxolan-2-yimethyl]-2.2,2-trifluoromethyi-4’AP/P/ 97 / 0 1 0 2 3

AP . Ο Ο 6 8 Ο chloroacetophenone oxime; benzenemethamine. N-[4-(dichloromethylene)-l,3-<iiotholan-2ylidene]-a-methyi; hydrochloride:diphenylmethoxy acetic acid, methyl ester, 1,8-naphthalic anhydride;4,6-dichloro-2-phenylpyrimidine: 2-chloro-N-[ 1-(2, 4, 6-trimethylphenyl)ethenyl]acetamide; cloquintocet; and ethylene glycol acetal of 1,1-dichloroacetone.
13. A method according to claim 12, wherein said antidote compound is selected from the group consisting of; 2,2,5-trimethyl-N-dichloroacetyl oxazolidine; 2,2-dimethyl-5-phenyl- Ndichloroacetyl oxazolidine; 2,2-dimethyl-5-(2-furanyl)-N-dichloroacetyI oxazolidine; 2,2dimethyl-5-(2-thienyl)- N-dichloroacetyl oxazolidine; Ν,Ν-diallyl dichloroacetamide; 2,2spirocyclohexv-N-dichloroacetyl oxazolidine: 2,2-dimethyl-N-dichloroacetyl oxazolidine; and 4-(dichloroacetyl)-3,4-dihydro-3-methyl-2//-1,4-benzoxazine.
14. A method according to claim 10. wherein the crop is com.
15. A method of reducing injury to crops by a 4-benzoylisoxazole herbicide of the formula (I) wherein.

R represents a hydrogen atom: a halogen atom: a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; a cycloalkyl group containing from 3 to 6 carbon atoms optionally substituted by one or more groups -R⁵. one or more halogen atoms or a group CO2R³: or a group selected from -CO2R³, -COR⁵, cyano. ηίσο. or -CONR³R^J;

R¹ represents a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; or a cycloalkyl group containing from three to six carbon atoms optionally substituted bv one or more groups R⁵ or one or more halogen atoms:

AP/P/ 97 / 0 1 0 2 3

AP. Ο Ο 6 8 Ο

R² represents a halogen atom: a straight- or branched-chain alkyl, alkenyl, alkynyl or alkoxy group containing up to six carbon atoms which is optionally substituted by one or more groups -OR⁵ or one or more halogen atoms; or a group selected from nitro, cyano, CO2R³. -S(O)PR⁶, -O(CH2)mOR⁵, -COR⁵. -NR⁶¹R⁶², -N(R⁸)SO2R⁷, -OR⁵, -OSO2R⁷, SO2NR³R⁴, -CONR³R⁴, -CSNR³R⁴ and -(CR⁹R¹⁰),-S(O)<,R⁷;

n represents an integer from one to five; when n is greater than one, the groups R² may be the same or different;

R³ and R⁴ each independently represents a hydrogen atom: or a straight- or branchedchain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

R⁵ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; a straight- or branchedchain alkenyl or alkynyl group containing from three to six carbon atoms which is optionally substituted by one or more halogen atoms; or phenyl optionally substituted by from one to five groups R^x which may be the same or different;

R⁶, R⁶¹ and R⁶², which may be ihe same or different, each represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; or phenyl optionally substituted by from one to five groups R²which may be the same or different;

R⁷ represents a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms; phenyl optionally substituted by from one to five groups R² which may be the same or different; or a halogen atom;

R° represents a hydrogen atom; a straight- or branched-chain alkyl, alkenyl or alkynyl group containing up to ten carbon atoms which is optionally substituted by one or more halogen atoms: a cycloalkvl group containing from three to six carbon atoms; phenyl optionally substituted by from one to five groups which may be the same or different selected from halogen, nitro, cyano. R'. -SfO)_nR⁵ and -OR³; or a group selected from -SO₂R⁶ and OR⁵:

R⁹ and R^{l( 3}. which may be the same or different, each represents a hydrogen atom: a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally

AP/P/ 9 7 / 0 1 0 2 3

AP . 0 0 6 8 0 substituted by one or more halogen atoms: or phenyl optionally substituted by from one to five groups R² which may be the same or different;

R⁵¹ and R⁵², which may be the same or different, each represents a hydrogen atom; or a straight- or branched-chain alkyl group containing up to six carbon atoms which is optionally substituted by one or more halogen atoms;

p represents zero, one or two; q represents zero, one or two; m represents one, two or three;

t represents an integer from one to four: when t is greater than one the groups -CR⁹R¹⁰- may be the same or different;

or an agriculturally acceptable salt thereof which possesses herbicidal properties; which comprises applying to the soil, crop or seed a non-phytotoxic antidotally effective amount of an antidote compound which is antidotally effective for said 4-benzovlisoxazoie herbicide.
16. A method according to claim 15. wherein said antidote compound is:

(i) a compound of the formula

O _R70-^C

N'

AP/P/ 97/01023 (HT) wherein R'° is selected from the group consisting of haloalkyl; haloalkenyl; alkyl; alkenyl; cvcloalkyl; cycloalkylalkvl; halogen: hydrogen; carboalkoxy; N-alkenylcarbamylalkvl; Nalkenvlcarbamyl; N-alkyl-N-alkynylcarbamvl; N-alkyl-N-alkynvlcarbamylalkyl; Nalkenvlcarbamylaikoxyalkyl; N-alkyl-N-alkynylcarbamylalkoxyalkvl; alkynoxv; haloalkoxy; thiocyanatoalkyi; aikenviaminoaikyl: alkylcarboalkvl; cvanoalkyl; cyanatoalkyl; alkenvlaminosulfonalkyl: alkylthioalkvl: haloalkylcarbonyloxvalkyl; alkoxycarboalkyl; haloaikenylcarbonyloxyalkyi: hydroxyhaioalkyloxvalkyl; hydroxyalkylcarboaikyloxyalkyl: hydroxvalkyl; alkoxvsulfonoalkyl; furyl: thienvi: alkyldithiolenvl; thienalkvl; phenyl; substituted phenyl wherein the substitutents can be selected from halogen, alkyl, haloalkyl, alkoxy, carbamvl. nitro, carboxylic acids and their salts, and haloalkylcarbamvl; phcnylalkvl

AP. Ο Ο 6 8 Ο phenylhaioalky 1; phenylalkenyl; substituted phenylalkenyl wherein the substituents can be selected from halogen, alkyl, alkoxy, and halophenoxy, phenylaikoxy; phenylalkylcarboxyalkyl; phenylcycioalkyl; halophenylalkenoxy; halothiophenylalkyl; halophenoxy alkyl; bicycioalkyl; alkenyicarbamylpyridinyl; alkynylcarbamylpyridinyl; dialkenylcarbamylbicycloalkenyl; and alkynylcarbamylbicycioaikenyi;

R⁷¹ and R⁷², which may be the same or different, are selected from the group consisting of alkenyl; haloalkenyl; hydrogen: alkyl; haloalkyl; alkynyl; cyanoalkyl; hydroxyaikyl; hydroxyhaloaikyl; haloalkyicarboxvalkyl; alkvlcarboxyalkyl; alkoxycarboxyalkyl; thioalkylcarboxyaikyl; alkoxvcarboalkyl; alkylcarbamyioxyalkyl; amino; formyl; haloalkyl-N-alkylamido; haloalkylamido; haloalkylamidoalkyl; haloalkyl-Nalkylamidoalkyl; haJoaikylamidoalkenvl; alkylimino; cycloalkyl; alkylcycloalkyl; alkoxyalkyl;

• alkvlsulfonyloxyalkyl; mercaptoalkvl; alkylaminoalkyl; alkoxycarboalkenyl;

haloaikylcarbonyl; alkylcarbonvi; alkenvlcarbamyloxvalkyl; cycioaikvlcarbamyioxyaikyl; alkoxycarbonvl; haloalkoxycarbonvl; halophenvlcarbamyloxyaikyl; cycloalkenyl; phenyl; substituted phenyl wherein said substitutents can be selected from alkyl, halogen, haloalkyl, alkoxy, haloalkylamido, phthalamido, hydroxy, alkylcarbamyioxy, alkenylcarbamyioxy, alkvlamido, haloalkylamido and alkyicarboaikenyi; phenylsulfonyl; substituted phenylalkyl wherein said substituents can be selected from halogen or alkyl; dioxvalkylene; halophenoxvalkylamido-alkyl: alkvlthiodiazolyl; piperidyl; piperidylalkyl; dioxolanylalkyl; thiazolyl; aikylthiazolvl; benzothiazolvl: halobenzothiazolyl; furyl; alkvl-substituted furyl; furylalkyl; pyridyl; alkylpyridyl; alkoxazolvl; tetrahydrofuryialkyl; 3-cvano- thienyl; alkyl substituted thienyl; 4,5-polvaikylene thienyl; a- haloalkylacetamidophenylalkyl; ahaloalkylacetamidomtrophenyialkyl: ct-haloalkylacetamidohalophenylalkyi; and cyanoalkenyl; or

R⁷¹ and R'² taken together form a structure consisting of piperidinyl; alkylpiperidinyi; pyridyl; di- or tetrahydropyridinvl; alkyltetrahydropyridyl; morpholvl; azabicyclononvl; diazacycloalkanvl: benzoalkvlpyrrolidinyl; oxazolidinvl; perhvdrooxazolidinyl; alkyloxazolidinyi; furyloxazolidinvl: thienvloxazolidinyl; pyridyloxazolidinvl; pyrimidinvloxazolidinvl; benzooxazolidinvl; C3.7 spirocycloalkyl-oxazolidinyl; alkvlammoaikenyl; aikylideneimino: pyrrolidinyl; piperidonvl: perhydroazepinvl; perhvdroazocinyl; pyrazolyi: dihvdropyrazolyl; piperazinyl; perhydro-1,4-diazepinyl;

AP/P/ 97/01023

AP. Ο Ο 6 8 Ο quinolinyl; isoquinolinyl; dihydro-, tetrahydro- or perhydroquinolyl or isoquinolyl; indolyl or di- or pcrhydroindolyl; and which combined R⁷¹ and R⁷² members can be substituted with those independent R⁷¹ and R⁷² radicals enumerated above; or (ii) a compound selected from the group consisting of:

a-[(cyanomethoxy)imino]benzeneacetonitrile;

α-[( 1,3-dioxoian-2-yimethoxy)imino]-benzeneacetonitrile;

0-[3-dioxolan-2-ylmethyl]-2,2,2-trifluoromethyl-4’-chloroacetophenone oxime;

benzenemethamine. N-[4-(dichloromethylene)-1,3-diotholan-2-ylidene]-ocmethyl, hydrochloride; diphenylmethoxv acetic acid, methyl ester;

1,8-naphthalic anhydride;

4,6-dichioro-2-pbenylpynmidine;

cloquintocet:

2-chloro-N-[ 1-(2, 4, 6-trimethylphenyl)ethenyl]acetamide; and ethylene glycol acetal of 1,1-dichloroacetone.
17. A method according to claim 16, wherein said antidote compound is selected from the group consisting of 2.2,5-trimethyl-N-dichloroacetyl oxazolidine; 2,2-dimethyI-5-phenyl- Ndichloroacetvl oxazolidine; 2.2-dimethyi-5-(2-furanyi)-N-dichloroacetvl oxazolidine; 2,2dimethyl-5-(2-thienyi)- N-dichloroacetyl oxazolidine; Ν,Ν-diallyl dichioroacetamide; 2,2spirocyclohexy-N-dichloroacetvl oxazolidine; 2.2-dimethyl-N-dichloroacetyl oxazolidine; 4(dichloroacetyi)-3.4-dihydro-3-methyI-2H-1,4-benzoxazine; 3-[3-(dichloroacervl)-2,2dimethyl-5-oxalidinyl]pyridine·. 4-(dichloroacetvl)- l-oxa-4-azapiro-(4,5)-decane; 2,2dichloro-1-(1, 2, 3, 4-tetrahvdro-l-methvl-2-isoquinolyl)ethanone; cis/trans-1,4bis(dichioroacetyl)-2, 5-dimethvlpiperazine; N-(dichloroacetvl)-l, 2, 3, 4tetrahydroquinaldine·. l,5-bis(dichloroacetvl)- 1, 5-diazacvclononane; 1-(dichloroacetyl)-1azaspiro[4,4]nonane; a-[(cyanomethoxyjimino]benzeneacetonitrile; a-[(l,3-dioxolan-2ylmethoxv)imino]benzeneacetomtiile; O-[l,3-dioxolan-2-ylmethyl]-2.2.2-trifluoromethyl-4’chloroacetophenone oxime; benzenemethamine, N-[4-(dichioromethvlene)-1.3-diotholan-2yiidene]-a-methyl: hydrochioride:diphenylmethoxy acetic acid, methyl ester; 1,8-naphthaiic

AP/P/ 9 7 / 0 1 0 2 3

AP. Ο Ο 6 8 Ο anhydride;4,6-dichioro-2-phenyipyrimidine; 2-chioro-N-[ 1-(2, 4, 6-trimethyiphenyl)ethenyi]acetamide; cloquintocet; and ethylene glycol acetal of 1,1-dichloroacetone.
18. A method according to ciaim 17, wherein said antidote compound is selected from ±e group consisting of: 2.2,5-trimethyl-N-dichloroacetyl oxazolidine; 2.2-dimethyl-5-phenyl- Ndichloroacetyl oxazolidine; 2,2-dimethyi-5-(2-furanyl)-N-dichloroacetyl oxazolidine; 2,2dimethyl-5-(2-thienyl)- N-dichloroacetyl oxazolidine; Ν,Ν-diallyl dichloroacetamide; 222spirocyclohexy-N-dichloroacetvl oxazolidine; 2,2-dimethyl-N-dichloroacetyl oxazolidine; and 4-(dichloroacetyl)-3,4-dihydro-3-methyl-2/7-1,4-benzoxazine.
19. A method according to ciaim 15, wherein the crop is com,
20. A method according to claim 15. wherein the 4-benzoylisoxazole herbicide of formula (I) is selected from the group consisting of 5-cvclopropyl-4-[2-chloro-3-ethoxy-4(ethylsuifonyl)benzovl]isoxazole; 4-(4-chioro-2-methyisulphonvlbenzoyl)-5cyclopropvlisoxazole; 5-cyclopropyl-4-(2-methylsuiphonyl-4~trifluoromethylbenzoyl)isoxazole; and 4-(4-bromo-2-methylsulphonylbenzoyl)-5-cyclopropylisoxazoie; and agriculturally acceptable salts thereof; and the antidote compound is selected from the group consisting of 2,2,5-trimethyl-N-dichIoroacetyl oxazolidine; 2,2-dimethyl-5-phenyl- Ndichloroacetyl oxazolidine; 2,2-dimethyl-5-(2-furanyl)-N-dichloroacetyl oxazolidine; 2,2dimethyl-5-(2-thienyl)- N-dichloroacervl oxazolidine; Ν,Ν-diallyl dichloroacetamide; 2,2spirocyciohexy-N-dichloroacetyi oxazolidine; 2,2-dimethyl-N-dichloroacetvl oxazolidine; and 4-(dichloroacetyl)-3,4-dihydro-3-methvl-2i/’-1,4-benzoxazine.