Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Reexamination Certificate
1999-04-22
2001-03-13
Clardy, S. Mark (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
C504S128000, C504S206000
Reexamination Certificate
active
06200929
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an agricultural chemical composition which comprises one or more than one first component having herbicidal activity selected from nonselective phosphoric acid herbicides (group a) and one or more than one second component selected from phosphorus acid derivatives and the like (group b) and optionally one or more than one third component selected from maleic hydrazide and the like (group c); and the use of said composition as a plant growth retardant or crop selective herbicide.
BACKGROUND OF THE INVENTION
If weeds are allowed to grow in a place such as a railroad, superhighway, open space left as it is, factory site, bank, levee between rice fields, orchard, or unplowed paddy or field, they presumably exert various bad influences on the place, for example, disturb the visibility of transportation, become a source of generation of disease and insect damage or interfere with farm work. In consideration of recent shortage in labor and increase in the labor cost, it has been difficult to control such weed growth, depending only on the human power and machine and it has been important to use a nonselective herbicide such as glyphosate, glyphosine, bialaphos or glufosinate.
When a lethal amount of the above-described nonselective herbicide is employed on the face of a slope or a levee between rice fields, however, it destroys almost all the weeds and no plant is left on the surface of soil, which leads to a problem of an outflow of the soil. In such a place, there is accordingly a demand for an agent that does not kill weeds completely but leaves various weeds green and retards their growth over a long period of time, that is, a plant growth retardant. Upon actual weed growth control, on the other hand, an amount of the agent used differs with the place to be sprayed owing to the influence of wind or the like. A plant growth retardant is, consequently, required to exhibit plant growth retarding effects at a wide range of amount of it used. In other words, there is a requirement for the development of a plant growth retardant which does not destroy the root of weeds even if the amount of it used is a little larger than its standard amount and at the same time and which exhibits plant growth retarding effects even if the amount of it used is a little smaller than its standard amount.
There have been attempts to use the above-described nonselective herbicide at a reduced amount of it or to use the nonselective herbicide as a plant growth retardant after adding thereto an agent for suppressing its herbicidal activity (Japanese Examined Patent Publication No. Sho 56-6402, Japanese Unexamined Patent Publication No. Sho 59-101500, Weed Science, 39, 622-628(1991)). Such attempts are however accompanied with the drawbacks that the plant growth retarding effects are not exhibited at a wide range of amount of herbicide used, the plant growth retarding spectrum is narrow, the plant growth retarding effects do not continue long and the like and, therefore, have not yet reached a practical use. There is accordingly a demand for the development of a plant growth retardant which can overcome the above-described defects.
In addition, there have been various attempts to develop a herbicide which has a wide herbicidal spectrum, has high safety for circumstances and shows selectivity on crops (European Patent EP 431545 and the like), but it has not yet been practically utilized. There is accordingly a demand for the development of a herbicide having wide herbicidal spectrum and excellent selectivity on crops.
DISCLOSURE OF THE INVENTION
The present inventors have carried out an extensive investigation on a blending agent with a nonselective herbicide such as glyphosate for long years and have consequently found an agricultural chemical composition usable as a plant growth retardant or crop selective herbicide by incorporating the nonselective herbicide with a component composed of a phosphorus acid derivative and the like and optionally a component composed of a plant growth regulator, a bactericide and the like.
In the present invention, there are provided an agricultural chemical composition which comprises one or more than one first component having herbicidal activity selected from the below-described component group (a) consisting of nonselective phosphoric acid herbicides and one or more than one second component selected from the below-described component group (b) consisting of phosphorus acid derivatives and the like and optionally at least one third component selected from the below-described component group (c) consisting of maleic hydrazide and the like; and the use of said composition as a plant growth retardant and a crop selective herbicide;
said component group (a) consisting of:
N-(phosphonomethyl)glycine or a salt thereof,
N,N-bis(phosphonomethyl)glycine or a salt thereof,
4-[hydroxy(methyl)phosphinoyl]-L-homoalanyl-L-alanyl-L-alanine or a salt thereof, and
4-[hydroxy(methyl)phosphinoyl]-DL-homoalanine or a salt thereof;
said component group (b) consisting of:
phosphorus acid derivatives each represented by the following formula (I):
[wherein R
1
represents a C
1-8
alkyl group (said alkyl group may be substituted with 1 to 3 halogen atoms or 1 to 3 C
1-3
alkoxy groups), a phenyl group or a benzyl group; M represents a hydrogen atom, an ammonium group (said ammonium group may be substituted with 1 to 4 C
1-3
alkyl groups), a sodium atom, a potassium atom, a lithium atom, a magnesium atom, a calcium atom, a barium atom, a zinc atom, a manganese atom, a copper atom, an iron atom, a nickel atom or an aluminum atom; and m stands for an integer equivalent to the positive valency of M];
chitosan derivatives each represented by the following formula (II):
[wherein n stands for an integer not less than 1 and R
2
represents a hydrogen atom, a C
1-6
alkyl group or a C
1-11
acyl group.];
isopropyl phosphate salts selected from the group consisting of the magnesium salt, barium salt, aluminum salt, calcium salt and iron salt of isopropyl phosphate,
organic acid metal salts selected from the group consisting of magnesium salts, barium salts, aluminum salts and calcium salts of at least one organic acid selected from the group consisting of lactic acid, propionic acid, formic acid, acetic acid, levulinic acid, benzoic acid, citric acid, alginic acid, L-(+)-ascorbic acid and salicylic acid {with the proviso that magnesium acetate and calcium acetate are excluded when the first component having herbicidal activity contains N-(phosphonomethyl)glycine or a salt thereof}, and organic metal salts selected from magnesium ethoxide and aluminum acetyl acetate; and
inorganic metal salts selected from the group consisting of aluminum nitrate, calcium phosphinate, ammonium aluminum sulfate and potassium aluminum sulfate; and
said component group (c) consisting of:
plant growth regulators, fungicides (inhibitors of ergosterol biosynthesis), mefluidide, atrazine, pyridate and clopyralid.
The N-(phosphonomethyl)glycine which may be a first component having herbicidal activity of the present invention is a nonselective herbicide commonly known as glyphosate.
The N,N-bis(phosphonomethyl)glycine which may be a first component having herbicidal activity of the present invention is a nonselective herbicide commonly known as glyphosine.
The 4-[hydroxy(methyl)phosphinoyl]-L-homoalanyl-L-alanyl-L-alanine which may be a first component having herbicidal activity of the present invention is a nonselective herbicide commonly known as bialaphos.
The 4-[hydroxy(methyl)phosphinoyl]-DL-homoalanine which may be a first component having herbicidal activity of the present invention is a nonselective herbicide commonly known as glufosinate.
The followings are structures of the first component having herbicidal activity of the present invention.
There is no particular limitation on the “salt thereof” in the first component having herbicidal activity provided that it is an organic or inorg
Amagasa Tadashi
Horibe Yoshimichi
Sato Kazuo
Tsukiyama Takahiro
Clardy S. Mark
Frishauf, Holtz Goodman, Langer & Chick, P.C.
Sankyo Company Limited
LandOfFree
Crop-selective herbicide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crop-selective herbicide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crop-selective herbicide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2484855