Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1991-06-06
1993-06-29
Robinson, Allen J.
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
504134, 504140, 504132, 504139, 504138, A01N 4316, A01N 3710, A01N 3902, A01N 43707
Patent
active
052230163
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a herbicidal composition and a herbicidal method. More specifically, this invention relates to a herbicidal composition which exhibits excellent herbicidal activity even in a comparatively small dosage, and a method of controlling weeds with same.
TECHNICAL BACKGROUND
Wheat, corn, rice, soybean, etc., are important crops, and a variety of herbicides have been used to achieve an increase in yields of these crops. However, conventional herbicides are hardly satisfactory in respect of herbicidal activity and safety for crops. It is desired to develop a safe herbicide which kills detrimental weeds in a small dosage, and shows no phytotoxicity to crops.
As such a herbicide, Japanese Laid-Open (Kokai) Patent Publication No. 10779/1988 (Sho 63-10779) discloses and proposes compounds of the following formula (IA) ##STR1## wherein Ar.sup.o is a group of the formula, ##STR2## in which R.sup.11 to R.sup.13 and R.sup.15 to R.sup.19 are the same as or different from each other and each is a hydrogen atom, a methyl group or an ethyl group, and each of R.sup.14 and R.sup.20 is a hydrogen atom, a hydroxyl group, a methyl group, a methoxy group or an ethoxy group, and
R.sup.o is a methyl group or a methoxy group.
Japanese Laid-Open (Kokai) Patent Publication No. 201180/1988 (Sho 63-201180) discloses a herbicidal composition comprising, as active ingredients, at least one compound selected from the group of urea derivative compounds of the following formula (IB) ##STR3## wherein:
Ar' is a group of the formula ##STR4## wherein R.sup.21 to R.sup.35 are the same as or different from each other and each is a hydrogen atom, a lower alkyl group or a lower alkoxyl group, R.sup.36 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a hydroxyl group provided that R.sup.22 and R.sup.23, R.sup.26 and R.sup.27, R.sup.29 and R.sup.30, R.sup.31 and R.sup.33, or R.sup.33 and R.sup.35 may be bonded to each other to form an alkylene chain optionally substituted with a lower alkyl group and may form a 5- or 6-membered ring together with carbon atoms to which these groups are bonded, or R.sup.31 and R.sup.32 may be bonded to each other to form an ethylenedioxyl group, or R.sup.34 and R.sup.35 may be bonded to each other to form a dichloromethylene group, A is a nitrogen atom or ##STR5## in which X is a hydrogen atom, a chlorine atom, a nitro group or a trifluoromethyl group, and B is a hydrogen atom, a methyl group or a methoxy group, and at least one compound selected from the group consisting of the following compounds (2A) to (2P): (2A) 4-chlorobutyn-2-yl N-(3-chlorophenyl)carbamate, (2B) 1,2-dimethyl-3,5-diphenyl-1H-pyrazolium methylsulfate, (2C) methyl 2-[4-(2,4-dichlorophenoxy)phenoxy]propionate, (2D) 3-(4-isopropylphenyl)-1,1-dimethylurea, (2E) 3-(3-chloro-4-methylphenyl)-1,1-dimethylurea, (2F) ethyl 2-[N-benzoyl-N-(3,4-dichlorophenyl)amino]propionate, (2G) S-2,3,3-trichloro-2-propenyl-N,N-diisopropylthiocarbamate, (2H) 4-hydroxy-3,5-diiodobenzonitrile, (2I) 2-chloro-N-(4-methoxy-6-methyl-1,3,5-triazin-2-ylaminocarbonyl)benzene sulfonamide, (2J) 3-(2-benzothiazolyl)-1,3-dimethylurea, (2K) 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine, (2L) 2-(4-chloro-6-ethylamino-1,3,5-triazin-2-yl)amino-2-methylpropionitrile, (2M) 2-(3,5-dichlorophenyl)-2-( 2,2,2-trichloroethyl)oxirane, (2N) 2-chloro-2'-ethyl-N-(2-methoxy-1-methylethyl)-6'-methylacetanilide, (20) 2-chloro-2',6'-diethyl-N-methoxymethylacetanilide, and (2P) 2-chloro-N-isopropyl-N-(3,3,5-trimethylcyclohexenyl)acetamide.
Further, the following compounds (3A) to (3P) are known to be herbicidally active compounds: (3A) 3-(5-tert-butyl-1,3,4-thiadiazolyl-2-yl)-1,3-dimethylurea, (3B) 1,3-dimethyl-3-(5-trifluoromethyl-1,3,4-thiadiazoyl-2-yl)urea, (3C) 1-(5-ethylsulfonyl-1,3,4-thiadiazoyl-2-yl)-1,3-dimethylurea, (3D) 3-(3,4-dichlorophenyl)-1,1-dimethylurea, (3E) 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea, (3F) 3,6-dichloro-2-methoxybenzoic acid, (3G) [(3,5,6-trichloro-2-pyridyl)-oxy]acetic acid triethylamine salt, (3H) 4-chl
REFERENCES:
patent: 4838924 (1989-06-01), Takematsu et al.
Kuramochi Hitoshi
Sato Takashi
Takematsu Tetsuo
Clardy S. Mark
Mitsui Petrochemical Industries Ltd.
Robinson Allen J.
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