Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1996-02-05
1997-09-30
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
A01N 4386
Patent
active
056725663
DESCRIPTION:
BRIEF SUMMARY
This application has been filed under 35USC 371 from International application PCT/JP94/01133 filed Jul. 12, 1994.
TECHNICAL FIELD
This invention relates to a herbicidal composition, and more detailedly relates to a herbicidal composition which contains as active ingredients a mixture of a certain 1,3-oxazin-4-one derivative and one or more certain known herbicides, and has a broad weed-control spectrum and can exert a sufficient herbicidal effect at a low dose of the active ingredients.
BACKGROUND ART
Many herbicides have so far been put to practical use in paddy fields, and they have generally widely been used as a single active ingredient preparation or a mixture containing two or more of active ingredients. However, although these agents are comparatively effective for annual weeds, they are less effective for perennial weeds, and thus it is the present state of things that perennial weeds having strong reproductivity such as Scirpus juncoides (Common name: Japanse bulrush), Sagittaria pygmaea (Japanese common name: Urikawa) and Cyperus serotenus (Japanese common name: Mizugayatsuri) tend to increase in paddy fields in Japan in recent years, and it is strongly desired to develop herbicides also effective for these perennial weeds.
The present inventors have intensely studied for developing herbicides satisfying the above requirements, and now found such herbicidal composition by combining the certain novel 1,3-oxazin-4-one derivative which the present inventors previously developed and proposed (see International Publication No. WO 93/15064) with certain known herbicides having different weed-control mechanisms and weed-control spectra. In this invention a wide range of weeds in paddy fields can selectively be controlled, moreover the herbicidal effect is synergistically increased compared with the case in which they are used alone respectively. Consequently this invention has made it applicable at a low dose of active ingredients, and furthermore the weed-control spectrum enlarged. Thus this invention has been completed.
DISCLOSURE OF INVENTION
The herbicidal composition of this invention is consisted of the following two components A and B. represented by the following general formula (I) ##STR2## wherein, R is a methyl or an ethyl group, Y is a halogen atom, a lower haloalkyl or a lower haloalkoxy group, and n is 0, 1, 2 or 3, and ole, midyl)urea, benzoate, 5-(4,6-dimethoxypyrimidin-2-yl-carbamoylsulfamoyl)-1-methylpyrazole-4-carb oxylate, and ethyl-1,2,3,4-tetrazol-5-yl)-pyrazole.
The herbicidal composition of the present invention is further detailedly described below.
1,3-Oxazin-4-one derivatives represented by the above general formula (I) used as component A in the herbicidal composition of the present invention are novel compounds not disclosed in prior publications, and details of preparation process, physical properties, herbicidal activities thereof are disclosed in the specification of International Publication No. WO 93/15064.
The term "lower" in the present specification means that a group or compound to which this term is attached has 6 or less carbon atoms.
In the compounds of the above formula (I), the "halogen atom" represented by Y includes fluorine, chlorine, bromine and iodine atoms; the "lower haloalkyl group" is a lower haloalkyl group of which at least one of the hydrogens is replaced with a halogen atom. This includes, for example, bromomethyl, dichloromethyl, trifluoromethyl, 2-iodoethyl, 1-chloroethyl, 3-chloropropyl, 2-methyl-2-chloropropyl and 2,2,2-trifluoroethyl groups, etc., and the "lower haloalkoxy group" is a lower haloalalkoxy group of which at least one of the hydrogen atoms is replaced with a halogen atom, and includes, for example, trifluoromethoxy, difluoromethoxy, chlorodifluoromethoxy, 2-chloroethoxy, 1,1,2,2-tetrafluroethoxy, 3-chloropropoxy and 2,2,3,3,3-pentafluoropropoxy groups, etc.
Representative examples of the compounds of the formula (I) are as follows. 1,3-oxazin-4-one oxazin-4-one oxazin-4-one oxazin-4-one oxazin-4-one xazin-4-one o-4H-1,3-
REFERENCES:
patent: 5436224 (1995-07-01), Hamatani et al.
Jikihara Kazuo
Makimura Futaba
Maruyama Toshishiro
Miyashita Yumiko
Morishige Jiro
Clardy S. Mark
Rhone-Poulenc Agrochimie
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