Herbicidal 4-benzoyl-1-methyl-5-hydroxypyrazoles

BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to novel pyrazole derivatives and selective herbicidal composition containing as an active ingredient one or two or more of said pyrazole derivatives.
(2) Description of the Prior Art
Hitherto, extensive researches and development on herbicides have been conducted for long years to provide varieties of herbicides for practical use. These herbicides have contributed to saving the labors for controlling weeds and to increasing production of agricultural and horticultural crops.
Yet, it is still required at present to develop novel drugs having more superior herbicidal characteristics. Especially as to agricultural and horticultural herbicides, it is desirable that they selectively control intended weeds with a lower dosage without adversely effecting on cultivated crops. However, the drugs which have been already known do not necessarily exhibit such favorable herbicidal characteristics.
The present inventors have found, in the course of researches on herbicidal characteristics of various organic compounds to develop useful herbicides, that the compounds of the formula (I) given below exhibit excellent herbicidal action against true grasses (true grasses and umbrella plants) and various broadleaf weeds without showing substantial adverse effects on useful crops such as cultivated crops of, for example, corn and sorghum, and, thus, completed the invention.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a novel pyrazole derivative having selective herbicidal action against weeds and grasses.
Another object of the invention is to provide a selective herbicidal composition containing said derivative as an active ingredient.
Other object of the invention will be apparent from the description below.
The pyrazole derivatives according to the present invention are represented by the following formula I: ##STR2## wherein, X denotes a halogen, nitro or methanesulfonyl,
Y denotes hydrogen, a lower alkyl or a halogen,
Z denotes a halogen or methanesulfonyl, and
R denotes hydrogen; an organic acid residue; a lower alkynyl; a lower alkyl or a lower alkenyl which may be substituted by a halogen, hydroxy, cyano or an alkoxycarbonyl; or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.
The chemical structural characteristics of these compounds reside in that 3-position of the pyrazole ring is unsubstituted (i.e. hydrogen atom).
DETAILED DESCRIPTION OF THE INVENTION
The halogen in the formula I generally means fluorine, chlorine, bromine or iodine atom, and preferably chlorine or bromine atom.
The halogen as X is preferably chlorine or bromine, and more preferably chlorine.
The halogen as Y is preferably chlorine or bromine.
The halogen as Z is preferably chlorine or bromine.
The halogen on the lower alkyl defined for R is preferably fluorine.
The halogen on the benzyl defined for R is preferably chlorine.
The lower alkyl as R or a moiety of R (on the benzyl defined for R) is a straight or branched alkyl usually having 1 to 4 carbon atoms and is preferably methyl, ethyl, n-propyl or i-propyl.
The lower alkenyl as R is a straight or branched alkenyl having 1 to 4 carbon atoms and is preferably allyl, 2-chloro-2-propenyl or 2-bromo-2-propenyl.
The lower alkynyl as R is a straight or branched alkynyl having 1 to 4 carbon atoms and is preferably 2-propynyl.
The alkoxy as a moiety of the alkoxycarbonyl is a straight or branched alkoxy having 1 to 4 carbon atoms, and is preferably methoxy, ethoxy or propoxy.
The organic acid residue as R includes methanesulfonyl, p-toluenesulfonyl, benzoyl, tert-butoxycarbonyl, acetyl, cyclohexylcarbonyl, cinnamoyl, acryloyl, phenoxyacetyl, ethoxycarbonyl, N,N-dimethylcarbamoyl, N,N-dimethylsulfamoyl, benzenesulfonyl, trifluoromethanesulfonyl, diethylphosphoryl or diethylthiophosphoryl and is preferably methanesulfonyl or p-toluenesulfonyl.
The important compounds according to the present invention include the following compounds:
(1) Compounds of the formula IA: ##STR3## wherein, X denotes a halogen, and R denotes hydrogen; an organic acid residue; a lower alkyl; a lower alkenyl; a lower alkynyl; a lower alkyl or a lower alkenyl each substituted by a halogen, hydroxy, cyano or alkoxycarbonyl; or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.
(2) Compounds of the formula IB: ##STR4## wherein, R denotes hydrogen, methanesulfonyl or p-toluenesulfonyl, benzyl, propagyl or cyanomethyl.
The compounds according to the present invention exhibit strong herbicidal activities when used for soil-treatment and soil mixing-treatment or post emergence treatment; no practical damage or phytotoxity is observed at all with respect to cultivated crops such as corn, maize, Sorghum bicolor (sorghum), etc. by either the soil-treatment or soil mixing-treatment or post emergence treatment with these compounds. The compounds of the invention exhibit highly selective activities and, thus, are extremely useful for controlling weeds during the cultivation of crops. Namely, the compounds exhibit strong herbicidal activity against harmful weeds which grow during cultivation of corn and sorghum, such as Echinochloa crus-galli (barnyardgrass), Amaranthus ascendens (pigweed), Polygonum nodosum (smartweed), Xanthium strumarium (cocklebur), Abutilon theophrasti (velvet leaf), Cyperus rotundus (purple nutsedge), Cyperus esculantus (yellow nutsedge), etc. Particularly, herbicidal activity against nutsedges is markedly high and very unique. Hitherto have been used during cultivation of corn and sorghum a triazine herbicide, atrazine, or acid anilide herbicides, alachlor and metholachlor. However, atrazine exhibits low activity against true grasses and very low activity against nutsedge although it has a high activity against broadleaf weeds. On the other hand, alachlor and metholachlor exhibit low activity against broadleaf weeds and extremely insufficient activity against nutsedge although they have a high activity against true grasses. Thus, it has been difficult to destroy all kinds of weeds by a single treatment with a chemical.
The present inventors have found, after extensive researches on herbicidal compounds, the present compounds which exhibit activity against varieties of weeds and, especially, remarkably high activity against perennial weeds, nutsedge, which has been difficult to control among these weeds. Thus, the present inventors have completed the invention. The compounds according to the present invention are advantageous because they do not damage corn and sorghum at all and, thus, they can be used safely.
Hitherto, there have been known some pyrazole derivatives having herbicidal activity. For example, there is described in Japanese Patent Publication No. Sho. 54-36648 and Japanese Laid-open Patent Publication No. Sho. 54-41872 that 4-benzoyl derivatives are useful as a herbicide.
Among these pyrazole derivatives, however, only pyrazolate having the formula below (Compound A) is used practically and commercially as an active ingredient of a herbicide as far as the present inventors' knowledge is concerned. ##STR5##
All the pyrazole derivatives disclosed in the above mentioned Japanese Laid-open Patent Publication No. Sho. 54-41872 is substituted by methyl (CH.sub.3) at 3-position of the pyrazole ring.
The majority of the pyrazole derivatives disclosed in the above mentioned Japanese Patent Publication No. Sho 54-36648 have a lower alkyl group at 3-position of the pyrazole ring and the substituent at 5-position thereof is --OH, --SH, a salt thereof or an ester with a specified organic acid. Among these pyrazole derivatives, only the following compound is exemplified as a pyrazole derivative having hydrogen atom at 3-position of the pyrazole ring: ##STR6## (hereinafter referred to as Compound B).
The Compound B, however, is inferior to the commercially available Compound A in herbicidal activity as apparent from the biological test data in the Japanese Patent Publication No. Sho. 54-36648.
The present inventors have confirmed that the compounds according to the invention have far superior herbicidal activity to Compounds A and B by conducting comparative tests of these compounds.
In spite of the facts that a number of pyrazole derivatives have been hitherto synthesized and the herbicidal activity tests thereof have been conducted, there has not been found a pyrazole derivative except the above-mentioned Compound B that has hydrogen atom at 3-position of the pyrazole ring.
This is because it has been very difficult to synthesize pyrazole derivatives having hydrogen atom at 3-position of the pyrazole ring while it has been relatively easy to synthesize pyrazole derivatives substituted by, for example, an alkyl, etc. at 3-position of said ring, and, moreover, because the former derivatives have been believed to be less active in herbicidal action than the latter alkyl derivatives and thus less practical than the latter ones.
The present inventors have made extensive researches on the pyrazole derivatives having hydrogen atom at 3-position of the pyrazole ring and have found a process for readily preparing such derivatives. Moreover, the present inventors have researched on the substituents at 5-position of the pyrazole ring and have unexpectedly found that the compounds of the formula (I) according to the present invention exhibit remarkably strong herbicidal action against true grasses and broadleaf weeds, as well as against nutsedges but are highly safe for corn and sorghum. Also the present inventors have found that such compounds exhibit extremely excellent properties as a herbicide to be used in a field. Moreover, the present inventors have found that these compounds not only exhibit high herbicidal activity against harmful weeds in a paddy field such as Echinochloa crus-galli (barnyardgrass), Monochoria vaginalis, Lindernia pyxidaria, Rotala indica, Sagittaria pygmaea and the like, but also have markedly high herbicidal activity against the weeds which have not been easily controlled, such as Cyperus serotinus, Scirpus hotarui and Eleocharis kuroguwai.
The superior effects on Cyperus serotinus etc. are brought about only by the chemical structure of pyrazole derivatives having hydrogen atom at 3-position of the pyrazole ring. It is also necessary, to provide such effects, that the benzoyl group on the pyrazole ring is substituted both at 2-position and 4-position of the benzyl ring.
Thus, the compounds according to the present invention exhibit remarkably high effects on perennial weeds such as Cyperus serotinus and Eleocharis kuroguwai which have not been easily controlled and against which no useful herbicide has been developed. The compounds according to the invention exhibit extremely excellent properties as a herbicide for a paddy field.
The compounds according to the present invention can be readily synthesized according to, for example, the following reaction: ##STR7## wherein, Q denotes a halogen or hydroxyl group, and X, Y and Z have the same meanings as defined in the formula (I).
Moreover, the Compound (b) can be readily converted to an appropriate organic acid ester through condensation reaction with an appropriate organic acid halide according to a conventional method.
Reaction (1) represents a reaction series comprising (i) synthesizing 4-carboethoxy-5-hydroxy-1-methylpyrazole from an ethoxymethylene malonate ester and methylhydrazine through cyclization reaction, followed by (ii) hydrolyzing and decarboxylating the resulting compound to obtain 5-hydroxy-1-methylpyrazole.
The compound (b) can be readily synthesized from the Compound (a) according to the Reaction (2). For example, compounds (b) may be prepared by reacting compound (a) with a substituted benzoyl halide in an inert solvent in the presence of a dehydrohalogenating agent, preferably such as sodium hydroxide, potassium hydroxide, sodium carbonate or triethylamine to produce the corresponding esters and then effecting rearrangement of the esters to obtain the compounds (b). As the solvent for the esterification reaction may be used, for example, organic solvents such as dioxane, acetonitrile, benzene, toluene or chloroform alone or in combination with each other or with water, namely two phase systems such as water-toluene, water-chloroform and the like.
The rearrangement reaction can be readily proceeded without any solvent or in a solvent inert to the reaction (desirably dioxane, acetonitrile and the like) in the presence of a Lewis acid such as aluminum chloride, tin chloride, zinc chloride, etc., or a base such as calcium hydroxide, potassium carbonate, sodium carbonate, etc.

The process for production of the compounds according to the invention will be illustrated specifically by way of the following examples. It should be noted that these examples are only illustrative and that the invention is not restricted to these examples.
SYNTHESIS EXAMPLE 1
Synthesis of 1-methyl-5-hydroxypyrazole ##STR8##
To a mixture of 150 ml of ethanol and 108 g (0.5 mol) of ethoxymethylenemalonate diethyl ester was added dropwise 23 g (0.5 mol) of methylhydrazine below 0.degree. C. After completion of the reaction mixture was stirred for 1 hour at room temperature, and then refluxed for 1 hour. Then the reaction mixture was added to 200 ml of concentrated hydrochloric acid and refluxed for 2 hours. After completion of the reaction, the reflux condenser was replaced by a water separator and, after adding butanol, the reaction mixture was subjected to azeotropic dehydration. After completion of the dehydration, butanol in the mixture was distilled off under reduced pressure and the residue was recrystallized from isopropylalcohol to give 38 g (0.38 mol) of the title compound as a hydrochloric salt (yield: 76%), m.p.: 135.degree.-147.degree. C.
SYNTHESIS EXAMPLE 2
Synthesis of 4-(2,4-dichloro-3-methylbenzoyl)-1-methyl)-1-methyl-5-hydroxypyrazole
(Compound No. 3)
In a 20% aqueous solution of 11.2 g (0.2 mol) of potassium hydroxide was dissolved 13.5 g (0.1 mol) of 1-methyl-5-hydroxylpyrazole hydrochloride and then 50 ml of chloroform was added to the resulting solution to give a two-layered mixture. Then, 22.4 g (0.1 mol) of 2,4-dichloro-3-methylbenzoyl chloride was added dropwise to the mixture and the resulting reaction system was subjected to reaction for 2 hours at room temperature. Chloroform layer was separated from the reaction liquid and dried. Then the solvent was distilled off under reduced pressure. The resulting solid was incorporated with 25 ml of 1,4-dioxane and 27.6 g (0.2 mol) of potassium carbonate and then heated at 100.degree. to 120.degree. C. Solid matter was obtained by the reaction approximately for 1 hour. After solvent was distilled off, the solid was added with 30 ml of isopropylalcohol and then refluxed for 30 minutes. The resulting powdery solid was poured into ice-water to dissolve the solid therein and acidified with hydrochloric acid. The solid thus produced was filtered off, dried and recrystallized from 95% ethanol to give 20.2 g of the end product (yield 71%), m.p. 131.0.degree..about.135.0.degree. C.
.sup.1 H-NMR(CDCl.sub.3, .delta., ppm): 2.50(3H, S), 3.66(3H, S), 7.10.about.7.46(3H), 8.16(1H, S).
SYNTHESIS EXAMPLE 3
Synthesis of 4-(2,4-dichlorobenzoyl)-1-methyl-5-benzoyloxypyrazole
(Compound No. 11)
4-(2,4-dichlorobenzoyl)-1-methyl-5-hydroxylpyrazole 2.71 g (0.01 mol) was dissolved in a solution of 1.01 g (0.01 mol) of triethylamine in 30 ml of absolute benzene. Then a solution of 1.41 g (0.01 mol) of benzoylchloride in 5 ml of absolute benzene was added dropwise thereto under stirring at room temperature and then the resulting mixture was heated at 40.degree. to 50.degree. C. for 30 minutes. After cooling the reaction mixture, the resulting salt was filtered off and benzene was distilled off therefrom under reduced pressure. The resulting oil was purified by column chromatography on silica gel eluting with benzene to give 3.26 g of the end product (yield 87%), m.p. 119.degree..about.120.degree. C.
.sup.1 H-NMR(.delta., ppm, CDCl.sub.3): 3.72(3H, S), 7.16.about.8.04(9H).
SYNTHESIS EXAMPLE 4
Synthesis of 4-(2,4-dichloro-3-methylbenzoyl)-1-methyl-5-(4-methylbenzenesulfonyloxy)pyrazole
(Compound No. 19)
To a solution of 1.43 g (0.005 mol) of 4-(2,4-dichloro-3-methylbenzoyl)-1-methyl-5-hydroxypyrazole and 0.51 g (0.005 mol) of triethylamine in 20 ml of absolute benzene was added 0.95 g of p-toluenesulfonyl chloride and the resulting mixture was stirred for one hour at room temperature. The salt thus produced was filtered off and subjected to after-treatment and purification similarly as in Synthesis Example 3 to give 2.0 g of the final product (yield 91%).
.sup.1 H-NMR(.delta., ppm, CDCl.sub.3): 2.40(3H, S), 2.43(3H, S), 3.77(3H, S), 6.89.about.7.87(7H).
SYNTHESIS EXAMPLE 5
Synthesis of 4-(2,3,4-trichlorobenzoyl)-1-methyl-5-methanesulfonyloxypyrazole
(Compound No. 20)
To a solution of 1.53 g (0.005 mol) of 4-(2,3,4-trichlorobenzoyl)-1-methyl-5-hydroxypyrazole and 0.51 g (0.005 mol) of triethylamine in 20 ml of absolute benzene was added dropwise 0.57 g (0.005 mol) of methanesulfonyl chloride with stirring. The same reaction and after-treatment as in Synthesis Example 4 were repeated to give 1.7 g of the final product (yield 89%), m.p. 152.degree.-155.degree. C.
.sup.1 H-NMR(.delta., ppm, CDCl.sub.3): 3.59(3H, S), 3.89(3H, S), 7.15.about.7.58(3H).
SYNTHESIS EXAMPLE 6
Synthesis of O,O-diethyl-O-[4-(2,4-dichlorobenzoyl)-1-methyl-5-pyrazolyl]phosphorothionate
(Compound No. 13)
In 20 ml of benzene were dissolved 1.36 g (0.005 mol) of 4-(2,4-dichlorobenzoyl)-1-methyl-5-hydroxypyrazole, 0.51 g (0.005 mol) of triethylamine and 0.94 g (0.005 mol) of diethyl chlorothiophosphate, and the resulting solution was heated under reflux with stirring for 5 hours. After completion of the reaction, the reaction system was subjected to the same after-treatment and purification as in Synthesis Example 3 to give 0.53 g of the final product as an oil (yield 25%).
.sup.1 H-NMR(.delta., ppm, CDCl.sub.3): 1.35(6H, t, J=7 Hz), 3.82(3H, S), 4.28(4H, q, d, J=7 Hz, J=10 Hz), 7.39.about.7.50(4H).
SYNTHESIS EXAMPLE 7
Synthesis of 4-(2-chloro-4-methanesulfonylbenzoyl)-1-methyl-5-hydroxypyrazole
2-chloro-4-methanesulfonyl benzoic acid 3.87 g (0.0165 mol) was added to 40 ml of tert.-butanol, and then were added thereto 3.47 g (0.0168 mol) of N,N'-dicyclohexylcarbodiimide and 1.21 g (0.088 mol) of anhydrous potassium carbonate. The resulting mixture was incorporated with 1.65 g (0.0168 mol) of 1-methyl-5-hydroxypyrazole with stirring at room temperature and heated at 60.degree. C. to effect reaction for 5 hours. After completion of the reaction, solvent was distilled away from the reaction mixture under reduced pressure and the resulting residue was washed with chloroform. Thereafter, the residue was incorporated with 30 ml of water and stirred. Insoluble matter was filtered out. The aqueous solution thus obtained was incorporated with conc. hydrochloric acid to adjust the pH thereof to 1 or lower and then with chloroform to effect extraction. An organic layer was separated, dried over anhydrous sodium sulfate, freed of solvent by distillation under reduced pressure, and dried to give 2.75 g of the final product (yield: 53%), m.p. 272.degree.-275.degree. C.
SYNTHESIS EXAMPLE 8
Synthesis of 4-(2-chloro-4-methanesulfonylbenzoyl)-1-methyl-5-(4-methylbenzenesulfonyloxy)-pyrazole
To 30 ml of benzene were added 1.57 g (0.005 mol) of 4-(2-chloro-4-methanesulfonylbenzoyl)-1-methyl-5-hydroxypyrazole 1.57 g (0.005 mol) and 0.51 g (0.005 mol) of triethylamine to give a homogeneous solution. Then was added thereto 0.95 g (0.005 mol) of p-toluenesulfonyl chloride and the resulting mixture was subjected to reaction at the reflux temperature of the solvent for 3 hours.
After completion of the reaction, the reaction mixture was allowed to cool and added with water to separate liuids. Benzene layer was washed successively with 5% aqueous solution of sodium hydrogencarbonate, water and saturated brine and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was purified through silica gel chromatography eluting with benzene/ethyl acetate to give 1.76 g of the final product (yield 75%), m.p. 141.0.degree..about.145.0.degree. C.
In the similar manner as in Synthesis Examples 1 through 8 the compounds listed in Table 1 were synthesized. The compounds obtained in Synthesis Examples 2 through 8 are also listed in Table 1.
TABLE 1__________________________________________________________________________The compounds of the formula: ##STR9## AppearanceCompound or .sup.1 HNMR (.delta., ppm, CDCl.sub.3)No. X Y Z R m.p. (.degree.C.) NC .sub.--H.sub.3 Other characteristic__________________________________________________________________________ peaks1 Cl H Cl H 181.0.about.181.5 3.68 7.38.about.7.61(4H), 8.01(1H, S)2 NO.sub.2 H Cl H 203.0.about.207.0 3.61 7.29(1H, S)3 Cl CH.sub.3 Cl H 131.0.about.135.0 3.66 2.50(3H, S), 7.32(1H, S)4 Cl H SO.sub.2 CH.sub.3 H 272.0.about.275.0 3.60 3.24(3H, S), 7.20(1H, S)5 Br H Br H 170.0.about.174.0 3.64 7.30(1H, S)6 Cl Cl Cl H 148.0.about.150.0 3.68 7.30(1H, S), 7.32(2H, double .alpha.)7 Cl Br Cl H 168.0.about.170.0 3.68 7.33(1H, S)8 Cl H F H 158.0.about.161.0 3.67 7.34(1H, S)9 Cl CH.sub.3 F H 122.0.about.124.0 3.62 2.32(3H, d, J=2Hz), 7.26(1H, S)10 Cl H Cl COCH.sub.3 oil 3.66 2.27(3H, S), 7.31.about.7.45(3H), 7.56(1H, S)11 Cl H Cl ##STR10## 119.0.about.120.0 3.72 7.16.about.8.04(9H)12 Cl H Cl ##STR11## 160.0.about.162.0 3.69 2.94(6H, S), 7.29.about.7.44(3H), 7.64(1H, S)13 Cl H Cl ##STR12## oil 3.82 1.35(6H, t, J=7Hz), 4.28(4H, q, d, J=7Hz, J=10Hz)14 Cl H Cl SO.sub.2 CH.sub.3 115.0.about.118.0 3.85 3.54(3H, S), 7.32.about.7.44(4H)15 Cl H Cl ##STR13## 109.0.about.112.0 3.70 --16 Cl H Cl ##STR14## -- 3.85 6.91.about.8.23(10H)17 Cl H Cl ##STR15## 177.0.about.179.0 3.78 --18 NO.sub.2 H Cl SO.sub.2 CH.sub.3 105.0.about.108.0 3.88 3.54(3H, S)19 Cl CH.sub.3 Cl ##STR16## oil 3.77 2.40(3H, S), 2.43(3H, S)20 Cl Cl Cl SO.sub.2 CH.sub.3 152.0.about.155.0 3.89 3.59(3H, S)21 Cl Cl Cl ##STR17## oil 3.74 2.40(3H, S)22 Cl Cl Cl ##STR18## 172.0.about.175.0 3.76 2.60(3H, S)23 Cl CH.sub.3 F ##STR19## oil 3.77 2.28(3H, d, J=2Hz), 2.40(3H, S)24 Cl Br Cl SO.sub.2 CH.sub.3 oil 3.80 3.26(3H, S), 7.29(2H, double d), 7.63(1H, S)25 Cl Cl Cl ##STR20## oil 3.81 1.37(6H, t, J=7Hz), 4.28(4H, q, d, J=7Hz, J=10Hz), 7.33(2H, d, d), 7.43(1H, S)26 Cl Br Cl ##STR21## oil 3.77 2.43(3H, S)27 Br H Br ##STR22## oil 3.77 2.42(3H, S), 7.00.about.7.83(8H)60 Cl H SO.sub.2 CH.sub.3 SO.sub.2 CH.sub.3 148.about.151 3.87 3.09(3H, S), 3.56(3H, S)83 Cl H SO.sub.2 CH.sub.3 ##STR23## 141.about.145 3.69 2.43(3H, S), 3.05(3H, S)324 Cl H SO.sub.2 CH.sub.3 ##STR24## 126.about.128 3.51 3.08(3H, S), 5.55(2H, S)298 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CCH 157.about.158 3.73 2.54(1H, t), 3.07(3H, S), 5.23(2H, d)299 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CN 166.about.167 3.77 3.08(3H, S), 5.43(2H,__________________________________________________________________________ S)
The compounds listed in Table 2 can be readily synthesized in accordance with the foregoing synthesis examples. Incidentally, it should be noted that the compounds according to the present invention are not restricted to these compounds.
TABLE 2______________________________________The compounds of the formula: ##STR25##Com-poundNo. X Y Z R______________________________________28 Cl H Cl COC.sub.2 H.sub.529 Cl H Cl COCH(CH.sub.3).sub.230 Cl H Cl COC(CH.sub.3).sub.331 Cl H Cl SO.sub.2 CF.sub.332 Cl H Cl SO.sub.2 N(CH.sub.3).sub.233 Cl H Cl ##STR26##34 Cl H Cl ##STR27##35 Cl H Cl ##STR28##36 Cl H Cl ##STR29##37 Cl H Cl ##STR30##38 Cl H Cl ##STR31##39 Cl H Cl COOC.sub.2 H.sub.540 Cl H Cl ##STR32##41 Cl H Cl ##STR33##42 Cl H Cl ##STR34##43 Cl H Cl ##STR35##44 Cl H Cl ##STR36##45 Cl H Cl ##STR37##46 Cl H Cl ##STR38##47 Cl H Cl ##STR39##48 Cl H Cl ##STR40##49 Cl H Cl ##STR41##50 Cl H Cl ##STR42##51 Cl H Cl ##STR43##52 Cl H Cl ##STR44##53 Cl H Cl ##STR45##54 Cl H Cl COOC(CH.sub.3).sub.355 Cl H Cl ##STR46##56 Cl H Cl ##STR47##57 Cl H SO.sub.2 CH.sub.3 COCH.sub.358 Cl H SO.sub.2 CH.sub.3 COC.sub.2 H.sub.559 Cl H SO.sub.2 CH.sub.3 COC(CH.sub.3).sub.361 Cl H SO.sub.2 CH.sub.3 SO.sub.2 CF.sub.362 Cl H SO.sub.2 CH.sub.3 ##STR48##63 Cl H SO.sub.2 CH.sub.3 ##STR49##64 Cl H SO.sub.2 CH.sub.3 ##STR50##65 Cl H SO.sub.2 CH.sub.3 ##STR51##66 Cl H SO.sub.2 CH.sub.3 ##STR52##67 Cl H SO.sub.2 CH.sub.3 ##STR53##68 Cl H SO.sub.2 CH.sub.3 COOC.sub.2 H.sub.569 Cl H SO.sub.2 CH.sub.3 ##STR54##70 Cl H SO.sub.2 CH.sub.3 ##STR55##71 Cl H SO.sub.2 CH.sub.3 ##STR56##72 Cl H SO.sub.2 CH.sub.3 ##STR57##73 Cl H SO.sub.2 CH.sub.3 ##STR58##74 Cl H SO.sub.2 CH.sub.3 ##STR59##75 Cl H SO.sub.2 CH.sub.3 ##STR60##76 Cl H SO.sub.2 CH.sub.3 ##STR61##77 Cl H SO.sub.2 CH.sub.3 ##STR62##78 Cl H SO.sub.2 CH.sub.3 COOC(CH.sub.3).sub.379 Cl H SO.sub.2 CH.sub.3 ##STR63##80 Cl H SO.sub.2 CH.sub.3 SO.sub.2 N(CH.sub.3).sub.281 Cl H SO.sub.2 CH.sub.3 ##STR64##82 Cl H SO.sub.2 CH.sub.3 ##STR65##84 NO.sub.2 H Cl COCH.sub.385 NO.sub.2 H Cl COC.sub.2 H.sub.586 NO.sub.2 H Cl COC(CH.sub.3).sub.387 NO.sub.2 H Cl ##STR66##88 NO.sub.2 H Cl SO.sub.2 CF.sub.389 NO.sub.2 H Cl ##STR67##90 NO.sub.2 H Cl ##STR68##91 NO.sub.2 H Cl ##STR69##92 NO.sub.2 H Cl ##STR70##93 NO.sub.2 H Cl ##STR71##94 NO.sub.2 H Cl ##STR72##95 NO.sub.2 H Cl COOC.sub.2 H.sub.596 NO.sub.2 H Cl ##STR73##97 NO.sub.2 H Cl ##STR74##98 NO.sub.2 H Cl ##STR75##99 NO.sub.2 H Cl ##STR76##100 NO.sub.2 H Cl ##STR77##101 NO.sub.2 H Cl ##STR78##102 NO.sub.2 H Cl ##STR79##103 NO.sub.2 H Cl ##STR80##104 NO.sub.2 H Cl ##STR81##105 NO.sub.2 H Cl COOC(CH.sub.3).sub.3106 NO.sub.2 H Cl ##STR82##107 NO.sub.2 H Cl SO.sub.2 N(CH.sub.3).sub.2108 NO.sub.2 H Cl ##STR83##109 NO.sub.2 H Cl ##STR84##110 Br H Br COCH.sub.3111 Br H Br COC.sub.2 H.sub.5112 Br H Br COC(CH.sub.3).sub.3113 Br H Br SO.sub.2 CH.sub.3114 Br H Br SO.sub.2 CF.sub.3115 Br H Br ##STR85##116 Br H Br ##STR86##117 Br H Br ##STR87##118 Br H Br ##STR88##119 Br H Br ##STR89##120 Br H Br ##STR90##121 Br H Br COOC.sub.2 H.sub.5122 Br H Br ##STR91##123 Br H Br ##STR92##124 Br H Br ##STR93##125 Br H Br ##STR94##126 Br H Br ##STR95##127 Br H Br ##STR96##128 Br H Br ##STR97##129 Br H Br ##STR98##130 Br H Br ##STR99##131 Br H Br COOC(CH.sub.3).sub. 3132 Br H Br ##STR100##133 Br H Br SO.sub.2 N(CH.sub.3).sub.2134 Br H Br ##STR101##135 Br H Br ##STR102##136 Cl H F COCH.sub.3137 Cl H F COC.sub.2 H.sub.5138 Cl H F COC(CH.sub.3).sub.3139 Cl H F SO.sub.2 CH.sub.3140 Cl H F SO.sub.2 CF.sub.3141 Cl H F ##STR103##142 Cl H F ##STR104##143 Cl H F ##STR105##144 Cl H F ##STR106##145 Cl H F ##STR107##146 Cl H F ##STR108##147 Cl H F COOC.sub.2 H.sub.5148 Cl H F ##STR109##149 Cl H F ##STR110##150 Cl H F ##STR111##151 Cl H F ##STR112##152 Cl H F ##STR113##153 Cl H F ##STR114##154 Cl H F ##STR115##155 Cl H F ##STR116##156 Cl H F ##STR117##157 Cl H F COOC(CH.sub.3).sub.3158 Cl H F ##STR118##159 Cl H F SO.sub.2 N(CH.sub.3).sub.2160 Cl H F ##STR119##161 Cl H F ##STR120##162 Cl CH.sub.3 F COCH.sub.3163 Cl CH.sub.3 F COC.sub.2 H.sub.5164 Cl CH.sub.3 F COC(CH.sub.3).sub.3165 Cl CH.sub.3 F SO.sub.2 CH.sub.3166 Cl CH.sub.3 F SO.sub.2 CF.sub.3167 Cl CH.sub.3 F ##STR121##168 Cl CH.sub.3 F ##STR122##169 Cl CH.sub.3 F ##STR123##170 Cl CH.sub.3 F ##STR124##171 Cl CH.sub.3 F ##STR125##172 Cl CH.sub.3 F ##STR126##173 Cl CH.sub.3 F COOC.sub.2 H.sub.5174 Cl CH.sub.3 F ##STR127##175 Cl CH.sub.3 F ##STR128##176 Cl CH.sub.3 F ##STR129##177 Cl CH.sub.3 F ##STR130##178 Cl CH.sub.3 F ##STR131##179 Cl CH.sub.3 F ##STR132##180 Cl CH.sub.3 F ##STR133##181 Cl CH.sub.3 F ##STR134##182 Cl CH.sub.3 F ##STR135##183 Cl CH.sub.3 F COOC(CH.sub.3).sub.3184 Cl CH.sub.3 F ##STR136##185 Cl CH.sub.3 F SO.sub.2 N(CH.sub.3).sub.2186 Cl CH.sub.3 F ##STR137##187 Cl CH.sub.3 F ##STR138##188 Cl CH.sub.3 Cl COCH.sub.3189 Cl CH.sub.3 Cl COC.sub.2 H.sub.5190 Cl CH.sub.3 Cl COC(CH.sub.3).sub.3191 Cl CH.sub.3 Cl SO.sub.2 CH.sub.3192 Cl CH.sub.3 Cl SO.sub.2 CF.sub.3193 Cl CH.sub.3 Cl ##STR139##194 Cl CH.sub.3 Cl ##STR140##195 Cl CH.sub.3 Cl ##STR141##196 Cl CH.sub.3 Cl ##STR142##197 Cl CH.sub.3 Cl ##STR143##198 Cl CH.sub.3 Cl ##STR144##199 Cl CH.sub.3 Cl COOC.sub.2 H.sub.5200 Cl CH.sub.3 Cl ##STR145##201 Cl CH.sub.3 Cl ##STR146##202 Cl CH.sub.3 Cl ##STR147##203 Cl CH.sub.3 Cl ##STR148##204 Cl CH.sub.3 Cl ##STR149##205 Cl CH.sub.3 Cl ##STR150##206 Cl CH.sub.3 Cl ##STR151##207 Cl CH.sub.3 Cl ##STR152##208 Cl CH.sub.3 Cl ##STR153##209 Cl CH.sub.3 Cl COOC(CH.sub.3).sub.3210 Cl CH.sub.3 Cl ##STR154##211 Cl CH.sub.3 Cl SO.sub.2 N(CH.sub.3).sub.2212 Cl CH.sub.3 Cl ##STR155##213 Cl CH.sub.3 Cl ##STR156##214 Cl Cl Cl COCH.sub.3215 Cl Cl Cl COC.sub. 2 H.sub.5216 Cl Cl Cl COC(CH.sub.3).sub.3217 Cl Cl Cl SO.sub.2 CF.sub.3218 Cl Cl Cl ##STR157##219 Cl Cl Cl ##STR158##220 Cl Cl Cl ##STR159##221 Cl Cl Cl ##STR160##222 Cl Cl Cl ##STR161##223 Cl Cl Cl COOC.sub.2 H.sub.5224 Cl Cl Cl ##STR162##225 Cl Cl Cl ##STR163##226 Cl Cl Cl ##STR164##227 Cl Cl Cl ##STR165##228 Cl Cl Cl ##STR166##229 Cl Cl Cl ##STR167##230 Cl Cl Cl ##STR168##231 Cl Cl Cl ##STR169##232 Cl Cl Cl ##STR170##233 Cl Cl Cl COOC(CH.sub.3).sub.3234 Cl Cl Cl ##STR171##235 Cl Cl Cl SO.sub.2 N(CH.sub.3).sub.2236 Cl Cl Cl ##STR172##237 Cl Cl Cl ##STR173##238 Cl Cl Cl ##STR174##239 Cl Br Cl COCH.sub.3240 Cl Br Cl COC.sub.2 H.sub.5241 Cl Br Cl COC(CH.sub.3).sub.3242 Cl Br Cl SO.sub.2 CF.sub.3243 Cl Br Cl ##STR175##244 Cl Br Cl ##STR176##245 Cl Br Cl ##STR177##246 Cl Br Cl ##STR178##247 Cl Br Cl ##STR179##248 Cl Br Cl ##STR180##249 Cl Br Cl COOC.sub.2 H.sub.5250 Cl Br Cl ##STR181##251 Cl Br Cl ##STR182##252 Cl Br Cl ##STR183##253 Cl Br Cl ##STR184##254 Cl Br Cl ##STR185##255 Cl Br Cl ##STR186##256 Cl Br Cl ##STR187##257 Cl Br Cl ##STR188##258 Cl Br Cl ##STR189##259 Cl Br Cl COOC(CH.sub.3).sub.3260 Cl Br Cl ##STR190##261 Cl Br Cl SO.sub.2 N(CH.sub.3).sub.2262 Cl Br Cl ##STR191##263 Cl Br Cl ##STR192##264 NO.sub.2 H SO.sub.2 CH.sub.3 COCH.sub.3265 NO.sub.2 H SO.sub.2 CH.sub.3 SO.sub.2 CH.sub.3266 NO.sub.2 H SO.sub.2 CH.sub.3 SO.sub.2 CF.sub.3267 NO.sub.2 H SO.sub.3 CH.sub.3 ##STR193##268 NO.sub.2 H SO.sub.3 CH.sub.3 ##STR194##269 NO.sub.2 H SO.sub.2 CH.sub.3 ##STR195##270 NO.sub.2 H SO.sub.2 CH.sub.3 ##STR196##271 NO.sub.2 H SO.sub.2 CH.sub.3 H272 SO.sub.2 CH.sub.3 H Cl SO.sub.3 CH.sub.3273 SO.sub.2 CH.sub.3 H Cl ##STR197##274 SO.sub.2 CH.sub.3 H Cl ##STR198##275 SO.sub.2 CH.sub.3 H Cl ##STR199##276 SO.sub.2 CH.sub.3 H Cl ##STR200##277 SO.sub.2 CH.sub.3 H Cl H278 SO.sub.2 CH.sub.3 H Cl COCH.sub.3279 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 COCH.sub.3280 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 SO.sub.2 CH.sub.3281 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 ##STR201##282 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 ##STR202##283 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 ##STR203##284 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 H285 Cl H SO.sub.2 CH.sub.3 COC.sub.2 H.sub.5286 Cl H SO.sub.2 CH.sub.3 SO.sub.2 CF.sub.3287 Cl H SO.sub.2 CH.sub.3 COCH.sub.3288 Cl H SO.sub.2 CH.sub.3 ##STR204##289 Cl H SO.sub.2 CH.sub.3 ##STR205##290 Cl H SO.sub.2 CH.sub.3 CH.sub.3291 Cl H SO.sub.2 CH.sub.3 C.sub.2 H.sub.5292 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CH.sub.2 CH.sub.3293 Cl H SO.sub.2 CH.sub.3 CH(CH.sub.3).sub.2294 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.3295 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CHCH.sub.2296 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CClCH.sub.2297 Cl H SO.sub.2 CH.sub.3 ##STR206##298 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CCH299 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CN300 Cl H SO.sub.2 CH.sub.3 CH.sub.2 COOC.sub.2 H.sub.5301 Cl H SO.sub. 2 CH.sub.3 CH.sub.2 CHCHCOOC.sub.2 H.sub.5302 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CH.sub.2 OH303 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CHCHCOOCH.sub.3304 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CHCHCH.sub.2 Cl305 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CHCHCH.sub.3306 Cl H SO.sub.3 CH.sub.3 CH.sub.2 CBrCH.sub.2307 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CCCH.sub.3308 Cl H SO.sub.2 CH.sub.3 CH.sub.2 CH.sub.2 Cl309 Cl H SO.sub.2 CH.sub.3 ##STR207##310 Cl H SO.sub.2 CH.sub.3 ##STR208##311 Cl H SO.sub.2 CH.sub.3 ##STR209##312 Cl H SO.sub.2 CH.sub.3 ##STR210##313 Cl H SO.sub.2 CH.sub.3 ##STR211##314 Cl H SO.sub.2 CH.sub.3 ##STR212##315 NO.sub.2 H SO.sub.2 CH.sub.3 CH.sub.3316 NO.sub.2 H SO.sub.2 CH.sub.3 CH.sub.2 CHCH.sub.2317 NO.sub.2 H SO.sub.2 CH.sub.3 CH.sub.2 CN318 NO.sub.2 H SO.sub.2 CH.sub.3 CH.sub.2 CCH319 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 CH.sub.3320 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 CH.sub.2 CHCH.sub.2321 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 CH.sub.2 CCH322 SO.sub.2 CH.sub.3 H SO.sub.2 CH.sub.3 CH.sub.2 CN323 Cl H SO.sub.2 CH.sub.3 COCClCCl.sub.2______________________________________
When the compounds according to the present invention are used for a herbicide, they may be applied generally together with appropriate carriers such as solid carriers, e.g. clay, talc, bentonite, diatomaceous earth, etc; or liquid carriers, e.g. water, alcohols (methanol, ethanol, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), chlorinated hydrocarbons, ethers, ketones, esters (ethyl acetate, etc.), acid amides (dimethylformamide, etc.). It is possible to add, as necessary, surfactants, dispersing agents, suspending agents, penetrating agents, spreaders, stabilizers, etc. to form arbitrary formulations such as emulsifiable concentrate, wettable powder, flowable (Suspension Concentrate), granule etc. for practical use.
If necessary, the compounds according to the invention may be mixed, during formulation or application, with other herbicides, various insecticides, bacteriocides, plant growth-regulator, cooperants, etc.
The other herbicides include the compounds described in "Farm Chemicals Handbook" 69th year of publication (1983).
In the following formulation examples, parts are by weight unless otherwise specified.
______________________________________Formulation Example 1: Emulsifiable concentrate______________________________________Compound No. 10 of the invention 30 partsxylene 45 partsSorpol 2680 10 parts(a mixture of non-ionic surfactantand anionic surfactant; trade namesupplied by Toho Chemical Co., Ltd.,Japan)dimethylformamide 15 parts______________________________________
The above ingredients are homogeneously blended with one another to give an emulsifiable concentrate. When in use, it is diluted with a suitable amount of water and applied.
______________________________________Formulation Example 2: Emulsifiable concentrate______________________________________Compound No. 4 of the invention 20 partsxylene 75 partsSorpol 2680 5 parts(a mixture of non-ionic surfactantand anionic surfactant; trade namesupplied by Toho Chemical Co., Ltd.,Japan)______________________________________
The above ingredients are homogeneously blended with one another to give an emulsifiable concentrate. When in use, it is diluted with a suitable amount of water and applied.
______________________________________Formulation Example 3: Wettable powder______________________________________Compound No. 11 of the invention 50 partsZeeklite A 46 parts(kaolin type clay: trade namesupplied by Ziecleid IndustriesCo., Ltd., Japan)Sorpol 5039 2 parts(a mixture of non-ionic surfactant andanionic surfactant: trade name suppliedby Toho Chemical Co., Ltd., Japan)Carplex (coagulation inhibitor) 2 parts(white carbon: trade name suppliedby Shionogi Pharmaceutical Co., Ltd.,Japan)______________________________________
The above ingredients are homogeneously crushed and mixed to give wettable powder. When in use, this wettable powder is diluted with an appropriate amount of water and applied.
______________________________________Formulation Example 4: Wettable powder______________________________________Compound No. 4 of the invention 50 partsZeeklite A 46 parts(kaolin type clay: trade namesupplied by Ziecleid IndustriesCo., Ltd., Japan)Sorpol 5039 2 parts(a mixture of non-ionic surfactant andanionic surfactant: trade name suppliedby Toho Chemical Co., Ltd., Japan)Carplex (coagulation inhibitor) 2 parts(white carbon: trade name supplied byShionogi Pharmaceutical Co., Ltd.,Japan)______________________________________
The above ingredients are homogeneously crushed and mixed to give wettable powder. When in use, this wettable powder is diluted with an appropriate amount of water and applied.
______________________________________Formulation Example 5: Flowable (Suspension Concentrate)______________________________________Compound No. 4 of the invention 25 partsAgrisol 8-710 10 parts(non-ionic surfactant: trade namesupplied by Kao Atlas Co., Ltd.,Japan)Lunox 1000C 0.5 part(anionic surfactant: trade namesupplied by Toho Chemical Co., Ltd.,Japan)1% aqueous Rhodopol 20 parts(thickening agent: trade name suppliedby Rhone-Poulenc S.A.Water 44.5 parts______________________________________
The above ingredients are homogeneously mixed to give flowable. When in use, this flowable is diluted with an appropriate amount of water and applied.
______________________________________Formulation Example 6: Flowable (Suspension Concentrate)______________________________________Compound No. 19 of the invention 25 partsAgrisol 8-710 10 parts(non-ionic surfactant: trade namesupplied by Kao Atlas Co., Ltd.,Japan)Lunox 1000C 0.5 part(anionic surfactant: trade namesupplied by Toho Chemical Co., Ltd.,Japan)1% aqueous Rhodopol 20 parts(thickening agent: trade name suppliedby Rhone-Poulenc S.A.Water 44.5 parts______________________________________
The above ingredients are homogeneously mixed to give flowable. When in use, this flowable is diluted with an appropriate amount of water and applied.
______________________________________Formulation Example 7: Granule______________________________________Compound No. 24 of the invention 5 partsbentonite 55 partstalc 40 parts______________________________________
After the above ingredients are homogeneously mixed and crushed, a small amount of water is added thereto and the mixture is kneaded well, granulated by means of an extrusion type granulator and dried to give granules.
The herbicidal compositions containing the compounds according to the present invention are applicable to non-cultivation lands such as athletic fields, vacant lands, railroad sides to damage and control a variety of weeds in addition to agricultural and horticultural lands such as farmlands, paddy fields, fruit gardens, etc. The application dosage of the compounds according to the invention may vary depending upon the place to be applied, application season, application manner, kind of weeds to be controlled, cultivated crops, etc., and is generally in the range of 0.025 to 10 kg per hectare (ha).
The herbicidal effectiveness of the compounds according to the present invention will be explained specifically by way of the following test examples.
BIOLOGICAL EXAMPLES
Test Example 1: Herbicidal effect by soil-treatment
Sterilized diluvial soil was placed in a plastic pot of 1/10000 are (a) in opening area and 10 cm in depth. Then were sown in spot-like Echinochloa crus-galli (barnyardgrass), Xanthium strumarium (cocklebur), Abutilon theophrasti (velvet leaf), Polygonum nodosum (smartweed), Amaranthus ascendens (pigweed) and Cyperus esculentus (yellow nutsedge), respectively. After the seeds were covered with the soil about 1.5 cm in depth, a diluted solution containing a predetermined amount of an active ingredient was applied uniformly over the surface of the soil.
The diluted solution was prepared by diluting with water the wettable powder or emulsifiable concentrate in the above formulation examples and applied by means of a small spray over the whole surface of the soil. Four weeks after the application, herbicidal effect against various weeds was evaluated according to the following evaluation rating. The results are shown in Table 3.
Evaluation rating:
5 . . . above 90% in herbicidal rate (completely withered)
4 . . . 70 to 90% in herbicidal rate
3 . . . 40 to 70% in herbicidal rate
2 . . . 20 to 40% in herbicidal rate
1 . . . 5 to 20% in herbicidal rate
0 . . . less than 5% in herbicidal rate (practically no effective)
The above herbicidal rate was calculated according to the following equation by measuring the weight of the living weeds above the soil each in a treated plot and an untreated plot. ##EQU1##
TABLE 3__________________________________________________________________________ Application dosage of Echinochloa Amaranthus Polygonum Xanthium Abutilon Cyperus an active ingredient crus-galli ascendens nodosum strumarium theophrasti esculentusCompound No. (Kg a .multidot. i/ha) (barnyardgrass) (pigweed) (smartweed) (cocklebur) (velvet leaf) (yellow__________________________________________________________________________ nutsedge) 1 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 2 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 3 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 4 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 5 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 8 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5 9 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 510 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 511 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 513 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 514 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 515 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 519 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 520 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 560 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 583 2.0 5 5 5 5 5 5 1.0 5 5 5 5 5 5 0.5 5 5 5 5 5 5atrazine 2.0 3 5 5 5 5 2(control comp.) 1.0 2 5 5 5 5 1 0.5 2 5 5 4 4 0alachlor 2.0 5 3 3 3 3 2(control comp.) 1.0 5 2 2 2 2 2 0.5 5 2 2 1 2 1Compound B 2.0 2 2 2 1 2 1(control comp.) 1.0 1 2 1 1 1 1 0.5 0 0 0 0 0 0__________________________________________________________________________
Test Example 2: Phytotoxity test against cultivated plants by soil-treatment
In a plastic box of 15 cm (length).times.22 cm (width).times.6 cm (depth) was placed sterilized diluvial soil, and corn and Sorghum bicolor (sorghum) were sown. After covering the seeds with the soil about 1.5 cm in depth, a diluted solution containing a predetermined amount of an active ingredient was uniformly applied over the surface of the soil. The diluted solution was prepared by diluting with water the wettable powder or emulsifiable concentrate in the above formulation examples, and the resulting diluted solution was applied by means of a small spray over the whole surface of the soil. Three weeks after the application, phytotoxity against the above crops was evaluated according to the following evaluating rating. The results are shown Table 4.
Evaluation rating:
5 . . . crops are almost completely withered.
4 . . . remarkable phytotoxity against crops is observed.
3 . . . phytotoxity against crops is observed.
2 . . . some phytotoxity against crops is observed.
1 . . . phytotoxity against crops is scarcely observed.
0 . . . no phytotoxity against crops is observed.
TABLE 4______________________________________ Application dosage of an activeCompound No. ingredient (Kg a .multidot. i/ha) corn sorghum______________________________________1 5.0 0 0 2.5 0 02 5.0 0 0 2.5 0 03 5.0 0 0 2.5 0 04 5.0 0 0 2.5 0 05 5.0 0 0 2.5 0 08 5.0 0 0 2.5 0 09 5.0 0 0 2.5 0 010 5.0 0 0 2.5 0 011 5.0 0 0 2.5 0 013 5.0 0 0 2.5 0 014 5.0 0 0 2.5 0 015 5.0 0 0 2.5 0 019 5.0 0 0 2.5 0 020 5.0 0 0 2.5 0 060 5.0 0 0 2.5 0 083 5.0 0 0 2.5 0 0atrazine 5.0 1 2(control comp.) 2.5 0 1 1.25 0 0alachlor 5.0 1 2(control comp.) 2.5 0 1______________________________________
Test Example 3: Herbicidal effect test (1) in submerged conditions
Alluvial soil was placed in a Neubauer pot of 1/10,000 are (a), and water was added thereto to obtain a submerged state of 2 cm in water depth through mixing. A mixture of the seeds of rice plant, Echinochloa crus-galli (barnyardgrass), Monochoria vaginalis (ducksalad), Lindernia pyxidaria, Rotala indica (toothcup) and Scirpus hotarui (bulrush) was sown in the pot and the tubers of Sagittaria pygmaea (arrowhead), Cyperus serotinus (perennial flate sedge) and Eleocharis kuroguwai (perennial spikerush) were planted and 3.5-4.0 of leaf stage rice plant were transplanted therein. The next day, a diluted solution containing a predetermined amount of an active ingredient was added dropwise over the surface of the water in the pot by means of a measuring pipette. Three weeks after the application, herbicidal effect against the above weeds were evaluated according to the following evaluation rating. The results are shown in Table 5.
Evaluation rating:
5 . . . above 90% in herbicidal rate (almost completely withered)
4 . . . 70.about.90% in herbicidal rate
3 . . . 40.about.70% in herbicidal rate
2 . . . 20.about.40% in herbicidal rate
1 . . . 5.about.20% in herbicidal rate
0 . . . below 5% in herbicidal rate (practically not effective)
The above herbicidal rate was calculated according to the following equation by measuring the weight of the living weeds above the soil each in a treated plot and an untreated plot. ##EQU2##
TABLE 5__________________________________________________________________________ Herbicidal effects Application Echinochloa Monochoria Lindernia Rotala Scirpus Sagittaria Cyperus EleocharisCompound No. dosage (Kg/ha) Rice plant crus-galli vaginalis pyxidaria indica hotarui pygmaea serotinus kurogwai__________________________________________________________________________ 1 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 5 5 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 5 6 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 5 7 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 5 8 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 510 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 511 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 513 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 514 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 515 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 516 0.5 0 5 5 5 5 5 5 5 5 0.25 0 4 5 5 5 5 5 5 5 0.125 0 3 5 5 5 5 5 5 517 0.5 0 5 5 5 5 5 5 5 5 0.25 0 4 5 5 5 5 5 5 5 0.125 0 3 5 5 5 5 5 5 518 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 520 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 521 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 522 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 523 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 524 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 525 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 526 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 527 0.5 0 5 5 5 5 5 5 5 5 0.25 0 5 5 5 5 5 5 5 5 0.125 0 5 5 5 5 5 5 5 5Compound A 0.5 0 4 4 4 3 3 4 3 2(control comp.) 0.25 0 3 3 3 2 2 2 2 1 0.125 0 2 2 1 1 1 1 1 0Compound B 0.5 0 3 3 3 3 2 4 1 0(control comp.) 0.25 0 2 2 2 2 1 2 0 0 0.125 0 1 1 1 1 0 1 0 0__________________________________________________________________________
Test Example 4: Herbicidal effect test (2) in submerged conditions
Alluvial soil was placed in a Wagner pot of 1/5,000 are (a), and water was added thereto to obtain a submerged state of 2 cm in water depth through mixing.
In the submerged soil in the Wagner pot were planted the tubers of Cyperus serotinus (perennial flat sedge) and Eleocharis kuroguwai (perennial spikerush) which had been picked in the previous year from a paddy field in which perennial weeds frequently occur and the seeds of Scirpus hotarui (bulrush) were scattered. Soon after germination of the weeds took place, a diluted solution of an active ingredient was added dropwise by means of a measuring pipette over the surface of the water in the pot to apply a predetermined amount of the active ingredient. Three weeks after the application, the weights of living weeds were measured and herbicidal rates (%) were calculated. Incidentally, the whitened portions of the weeds were regarded as withered portions. The results are shown in Table 6. ##EQU3##
TABLE 6______________________________________ Application dosageCompound of an active ingre- Scirpus Cyperus EleocharisNo. dient (Kg a .multidot. i/ha) hotarui serotinus kuroguwai______________________________________ 1 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 2 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 3 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 4 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 5 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 6 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 7 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 8 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100 9 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10010 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10011 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10013 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10014 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10015 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10016 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10017 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10018 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10019 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10020 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10021 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10022 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10023 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10024 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10025 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10026 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10027 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10060 0.5 100 100 100 0.25 100 100 100 0.125 100 100 10083 0.5 100 100 100 0.25 100 100 100 0.125 100 100 100Compound A 0.5 65 58 25(control comp.) 0.25 28 25 10 0.125 11 10 0Compound B 0.5 48 38 8(control comp.) 0.25 23 12 0 0.125 8 0 0______________________________________
The control compounds used in Test Examples 1 through 4 have the following structural formula: ##STR213## (a compound described in Japanese Patent Publication No. Sho 54-36648).

Number	Name	Date	Kind
4063925	Konotsune et al.	Dec 1977
4230481	Nishiyama et al.	Oct 1980

Herbicidal 4-benzoyl-1-methyl-5-hydroxypyrazoles

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