JP2003335607A - Crop growth-regulating agent and method for modulating crop growth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a crop growth-regulating agent having an excellent capability for accelerating the growth of various crops, and to provide a method for modulating the growth of the crops by using the same. <P>SOLUTION: The crop growth-regulating agent contains at least 1 kind of abscisic acid and at least 1 kind of jasmonic acid expressed by following formula (1) (wherein, R<SP>1</SP>is a hydrocarbon group; and R<SP>2</SP>is H or a hydrocarbon group), and the method for regulating the growth of the crops by using the crop growth-regulating agent is also provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a novel crop growth regulator and a method for regulating crop growth using the same.

[0002]

2. Description of the Related Art Increasing yield by promoting maturation and enlargement of crops is a major issue in agricultural technology.
Many methods have been devised for this in the past.
Promote crop growth by using plant growth regulators,
One method is to increase revenue.

Conventionally, a method of using abscisic acid has been known as a method of promoting the growth of crops and increasing the yield by utilizing a plant growth regulator. Abscisic acids are known as substances having a plant growth regulating action. As its action, for example, action for promoting hypertrophic maturation for oysters and apples (JP-A-4-264005, JP-A-4-264006, etc.), other, seed germination promotion, prevention of low temperature damage, root system growth promotion, etc. Is mentioned.

However, while abscisic acids have various kinds of actions as described above, they are required to act on crops at a high cost and in a high concentration, so that their application situations are limited. For example, Japanese Unexamined Patent Publication (Kokai) No. 5-139912 proposes a crop growth regulator using abscisic acid and gibberellin together. Even in the method described in this document, natural abscisic acid ((+)-2), which is expensive, is also used.
-Cis-4-trans-abscisic acid, hereinafter referred to as "natural abscisic acid". ) Is used.

On the other hand, n-propyl (2-pentyl-3-
When a jasmonic acid compound represented by oxo-cyclopentyl) acetate (generic name: prohydrojasmon) is applied to a plant, growth promotion, germination promotion to the plant,
It has been reported that various effects such as prevention of low temperature damage, promotion of delamination formation, prevention of fruit cracking of harvested fruits, and retention of freshness of flowers are produced, and application to the agricultural field is proposed (WO94 / 1).
39908, JP-A-8-113503, JP-A-11-139908, and JP-A-11-2556.
No. 01, No. 11-299352, No. 2
000-16902 publication).

Further, in WO94 / 18833,
It is described that this product has activities such as an effect of promoting coloring of grape fruits and an effect of improving sugar content; an effect of promoting growth of potato, rice, wheat and the like; an effect of fruit enlargement of fruits such as strawberry and tomato;

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel crop growth regulator having an excellent ability to promote the growth of various crops, and a crop growth regulation method using the same. .

[0008]

[Means for Solving the Problems] The present inventors have made extensive studies on a method for increasing crop yield by promoting the growth of crops by utilizing a plant growth regulator. As a result, it was found that, when abscisic acids and jasmonic acid compounds are used in combination, remarkable growth effects on fruits such as fruit growth effect, improved fruit coloring, and improved sugar content, which are not found in each single agent, can be obtained. The invention was completed.

Thus, according to the first aspect of the present invention, as an active ingredient, at least one abscisic acid compound and a compound of formula (1)

[0010]

[Chemical 2]

(Wherein R ¹ represents a hydrocarbon group and R ² represents a hydrogen atom or a hydrocarbon group), and at least one jasmonic acid compound represented by the formula: A crop growth regulator is provided. The second aspect of the present invention
According to the present invention, there is provided a method for controlling growth of a crop, which comprises applying the crop growth regulator of the present invention to the crop.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The crop growth regulator and crop growth regulating method of the present invention will be described in detail below. 1) Crop Growth Regulator The crop growth regulator of the present invention contains, as active ingredients, at least one abscisic acid compound and at least one jasmonic acid compound represented by the formula (1). And

(1) Abscisic Acid Abscisic acids used in the present invention are natural abscisic acid and natural abscisic acid analogs. Examples of natural abscisic acid analogs include synthetic abscisic acid,
Examples thereof include biosynthetic precursors of natural or synthetic abscisic acid, and plant metabolites of natural or synthetic abscisic acid.

Specific examples of abscisic acids to be used include:
Natural abscisic acid; Synthetic abscisic acid (ie,
(±) -2-cis-4-trans-abscisic acid, and / or (±) -2-trans-4-trans-abscisic acid); zeaxanthin, anseraxanthin, all-trans-violaxanthin, all-trans-neo Biosynthetic precursors of abscisic acid, such as xanthine, 9'-cis-neoxanthin, 9'-cis-violaxanthin, xanthoxin, xanthoxic acid, abscisic aldehyde; Abscisic acid plant metabolism, such as caseinates and dihydrocaseinates Thing; etc. are mentioned. Among these, it is preferable to use natural abscisic acid or synthetic abscisic acid because it is easily available and the plant growth regulating action is excellent. The abscisic acids may be used alone or in combination of two or more.

As the abscisic acids, general commercial products can be used. In addition, for example, JP-A-63-2966
It is also possible to use those manufactured by the methods described in Japanese Patent Application Laid-Open No. 97-97, and Japanese Patent Application Laid-Open No. 63-296696.

(2) Jasmonic Acid Compound In the present invention, the jasmonic acid compound represented by the above formula (1) is used together with abscisic acids. In the above formula (1), R ¹ represents a hydrocarbon group. Examples of the hydrocarbon group include an alkyl group having 1 to 20 carbon atoms and an alkenyl group having 2 to 20 carbon atoms.

Specific examples of R ¹ include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group,
sec-butyl group, t-butyl group, n-pentyl group, isopentyl group, 2-methylbutyl group, 1-methylbutyl group, n-hexyl group, isohexyl group, 3-methylpentyl group, 2-methylpentyl group, 1- C1-C20 alkyl groups such as methylpentyl group, n-heptyl group, isoheptyl group, n-octyl group, isooctyl group, 2-ethylhexyl group, nonyl group and decyl group; allyl group, 2-butenyl group, 3 -Butenyl group, isobutenyl group, 4-pentenyl group, 3-pentenyl group, trans-
2-pentenyl group, cis-2-pentenyl group, 1-pentenyl group, 3-methyl-2-pentenyl group, 5-hexenyl group, 3-hexenyl group, 2-hexenyl group, heptenyl group, octenyl group, nonenyl group, And alkenyl groups having 2 to 20 carbon atoms such as decenyl group; and the like.

Of these, R ¹ is preferably an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, more preferably an alkyl group having 4 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms. Preferred is the n-pentenyl group, and is particularly preferred.

R ² represents a hydrogen atom or a hydrocarbon group.
Examples of the hydrocarbon group include an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, and 2 to 2 carbon atoms.
20 alkynyl groups and the like. Moreover, the hydrocarbon group of R ² may contain a hetero atom such as an oxygen atom, a nitrogen atom, or a sulfur atom. Examples of such a hydrocarbon group include a hydroxyalkyl group having 1 to 20 carbon atoms.

Preferred specific examples of R ² are hydrogen atom; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, n-pentyl group, n-hexyl group, 2-methylbutyl group and the like. An alkyl group having 1 to 8 carbon atoms; an allyl group, a 3-butenyl group, a 2-pentenyl group, 4
An alkenyl group having 2 to 8 carbon atoms such as -methyl-3-pentenyl group and 2-hexenyl group; an alkynyl group having 2 to 8 carbon atoms such as bropargyl group, 3-butynyl group, 2-pentynyl group and 3-hexynyl group A hydroxymethyl group, 2
-Hydroxyethyl group, 2-hydroxypropyl group, 3
Examples thereof include a hydroxyalkyl group having 1 to 8 carbon atoms such as a hydroxypropyl group.

The jasmonic acid compound represented by the formula (1) may have optical isomers derived from an asymmetric carbon atom. Also, when R ¹ and / or R ² is an alkenyl group, cis-trans stereoisomers may exist. All of these compounds can be used in the present invention.

In the above formula (1), R ² is a hydrocarbon group, that is, specific examples of the jasmonic acid ester compound include methyl (2-n-pentyl-3-oxo-cyclopentyl) acetate and methyl [2- (3 -N-pentenyl) -3-oxo-cyclopentyl] acetate, ethyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, ethyl [2- (2-n-pentenyl)
-3-Oxo-cyclopentyl] acetate, n-propyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, n-propyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate, n
-Propyl [2- (3-n-pentenyl) -3-oxo-cyclopentyl] acetate, n-propyl [2-
(2-Methyl-n-butyl) -3-oxo-cyclopentyl] acetate, n-propyl [2- (2,2-dimethylpropyl) -3-oxo-cyclopentyl] acetate, isopropyl (2-n-pentyl-3) -Oxo-
Cyclopentyl) acetate,

Isopropyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate, Isopropyl [2- (3-n-pentenyl) -3-oxo-
Cyclopentyl] acetate, n-butyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, n
-Butyl [2- (2-n-pentenyl) -3-oxo-
Cyclopentyl] acetate, n-butyl [2- (3-
n-Pentenyl) -3-oxo-cyclopentyl] acetate, isobutyl (2-n-pentyl-3-oxo-
Cyclopentyl) acetate, isobutyl [2- (2-
n-pentenyl) -3-oxo-cyclopentyl] acetate, sec-butyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, sec-butyl [2
-(2-n-Pentenyl) -3-oxo-cyclopentyl] acetate, t-butyl (2-n-pentyl-3-)
Oxo-cyclopentyl) acetate, 2-methylbutyl (2-n-pentyl-3-oxo-cyclopentyl)
acetate,

N-Pentyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, n-pentyl [2
-(2-n-Pentenyl) -3-oxo-cyclopentyl] acetate, n-hexyl (2-n-pentyl-3
-Oxo-cyclopentyl) acetate, n-hexyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate, n-heptyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate , N-octyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, n-octyl [2- (2-
n-Pentenyl) -3-oxo-cyclopentyl] acetate, n-decyl (2-n-pentyl-3-oxo-
Cyclopentyl) acetate, allyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, 2-butenyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, cis-2-pentenyl (2-n-pentyl- 3-oxo-cyclopentyl) acetate, trans-2-hexenyl (2-n-pentyl-3-oxo-cyclopentyl) acetate,

4-methyl-3-pentenyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, cis-3-hexenyl (2-n-pentyl-3-oxo-)
Cyclopentyl) acetate, propargyl (2-n-
Pentyl-3-oxo-cyclopentyl) acetate,
2-Pentynyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, 3-butynyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, 3-
Hexynyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, 2-hydroxyethyl (2-n-
Pentyl-3-oxo-cyclopentyl) acetate,

2-hydroxypropyl (2-n-pentyl-3-oxo-cyclopentyl) acetate, allyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate, propargyl [2- (2-n -Pentenyl) -3-oxo-cyclopentyl] acetate,
3-butenyl [2- (2-n-pentenyl) -3-oxo-cyclopentyl] acetate, 3-butynyl [2-
(2-n-Pentenyl) -3-oxo-cyclopentyl] acetate, cis-3-hexenyl [2- (2-n
-Pentenyl) -3-oxo-cyclopentyl] acetate and the like. These jasmonic acid ester components may be used alone or in combination of two or more.

In the above formula (1), R ² is a hydrogen atom,
That is, as a specific example of the jasmonic acid compound, (2-
Ethyl-3-oxo-cyclopentyl) acetic acid, (2-n
-Propyl-3-oxo-cyclopentyl) acetic acid, (2
-Isopropyl-3-oxo-cyclopentyl) acetic acid,
(2-n-Butyl-3-oxo-cyclopentyl) acetic acid, (2-sec-butyl-3-oxo-cyclopentyl) acetic acid, (2-t-butyl-3-oxo-cyclopentyl) acetic acid, (2-n- Pentyl-3-oxo-cyclopentyl) acetic acid, (2-isopentyl-3-oxo-cyclopentyl) acetic acid, [2- (2-methyl-n-butyl) -3-oxo-cyclopentyl] acetic acid,

[2- (1-methyl-n-butyl) -3-
Oxo-cyclopentyl] acetic acid, (2-n-hexyl-
3-oxo-cyclopentyl) acetic acid, (2-isohexyl-3-oxo-cyclopentyl) acetic acid, [2- (3-
Methyl-n-pentyl) -3-oxo-cyclopentyl] acetic acid, [2- (2-methyl-n-pentyl) -3-
Oxo-cyclopentyl] acetic acid, [2- (1-methyl-
n-pentyl) -3-oxo-cyclopentyl] acetic acid,
(2-allyl-3-oxo-cyclopentyl) acetic acid,
[2- (3-n-butenyl) -3-oxo-cyclopentyl] acetic acid, (2-isobutenyl-3-oxo-cyclopentyl) acetic acid, [2- (4-n-pentenyl) -3-
Oxo-cyclopentyl] acetic acid,

[2- (3-n-pentenyl) -3-oxo-cyclopentyl] acetic acid, [2- (trans-2-n
-Pentenyl) -3-oxo-cyclopentyl] acetic acid,
[2- (cis-2-n-pentenyl) -3-oxo-cyclopentyl] acetic acid, [2- (1-n-pentenyl)-
3-oxo-cyclopentyl] acetic acid, [2- (3-methyl-2-n-pentenyl) -3-oxo-cyclopentyl] acetic acid, [2- (5-n-hexenyl) -3-oxo-cyclopentyl] acetic acid, [2- (3-n-hexenyl) -3-oxo-cyclopentyl] acetic acid, [2- (2
-N-hexenyl) -3-oxo-cyclopentyl] acetic acid and the like. These jasmonic acid compounds can be used alone or in combination of two or more.

The jasmonic acid compounds represented by the above formula (1) are all known compounds and can be produced by a conventional method. For example, in the above formula (1), R ¹
Is an n-pentyl group and R ² is an alkyl group is 2-n-pentylcyclopentene-1.
It can be easily obtained by Michael-adding -one and an alkyl ester of malonic acid and then decarboxylation. Further, the alkyl ester thus produced can be transesterified with an alcohol according to a conventional method to produce another type of ester. Further, in the formula (1), the jasmonic acid compound in which R ² is a hydrogen atom can be obtained, for example, by hydrolyzing a jasmonic acid ester.

The mixing ratio of the abscisic acid compound and the jasmonic acid compound in the crop growth regulator of the present invention is not particularly limited, and can be appropriately set depending on the kind of crop, the action and the application method and the like. [Abscisic acids]:
The weight ratio of [jasmonic acid compound] is usually 1: 0.
001 to 1: 1,000,000, preferably 1: 0.
01 to 1: 10,000, more preferably 1: 0.05
To 1: 1,000, more preferably 1: 0.1 to 1:
When it is 100, the crop growth regulating action exhibits a particularly high synergistic effect, which is preferable.

(3) Crop Growth Regulator The crop growth regulator of the present invention may be produced by combining the above-mentioned two components as an active ingredient with at least one selected from solid carriers, liquid carriers and dispersants. it can.

Specific preferred examples of the solid carrier include kaolinite group, montmorillonite group, attapulgite group, clay group typified by Zyklide, talc,
Inorganic substances such as mica, pyrophyllite, pumice, vermiculite, gypsum, calcium carbonate, dolomite, diatomaceous earth, magnesium, lime, phosphorus lime, zeolite, anhydrous silicic acid, synthetic calcium silicate; soybean powder, tobacco powder, walnut Plant organic substances such as flour, wheat flour, wood flour, starch, crystalline cellulose, ester gum, copal gum and dumbrum gum; synthetic polymer compounds such as coumarone resin, petroleum resin, alkyd resin, polyvinyl chloride and ketone resin; carnauba wax, honey Waxes such as wax; ureas and the like. These solid carriers can be used alone or in combination of two or more kinds.

Specific preferred examples of the liquid carrier include kerosene, mineral oil, spindle oil, white oil, benzene, toluene, xylene, ethylbenzene, cumene, paraffinic, naphthenic or aromatic hydrocarbons such as methylnaphthalene; Chlorinated hydrocarbons such as carbon chloride, chloroform, trichloroethylene, monochlorobenzene, o-chlorotoluene; ethers such as dimethyl ether, diethyl ether, dioxane, tetrahydrofuran; acetone, methyl ethyl ketone, diethyl ketone, diisobutyl ketone, cyclopentanone, Ketones such as cyclohexanone, acetophenone and isophorone; ethyl acetate, amyl acetate, ethylene glycol acetate, diethylene glycol acetate, dibutyl maleate, koha Esters such as diethyl acid; alcohols such as methanol, ethanol, n-propanol, isopropanol, n-hexanol, ethylene glycol, diethylene glycol, and glycerin; ether alcohols such as ethylene glycol phenyl ether and diethylene glycol butyl ether; dimethylformamide, dimethyl sulfoxide And water.

Among these, hydrocarbons, ketones,
Alcohols and water are preferable, and alcohols and water are particularly preferable. These liquid carriers can be used alone or in combination of two or more.

As the dispersant, those which are commonly used in the field of agricultural chemicals can be used, and generally, a surfactant is used. As the surfactant, a nonionic surfactant,
Examples include cationic surfactants, anionic surfactants, and amphoteric surfactants. Among these, it is preferable to use a nonionic surfactant.

Examples of the nonionic surfactant include, for example,
Block condensation polymers of two or more alkylene oxides such as oxyethylene oxypropylene block polymers;
Polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene higher alcohol (C ₁₂ -C ₁₄ ). Polyoxyalkylene ether compounds such as ethers; polyoxyethylene glycol monolaurate, polyoxyethylene glycol monopalmitate, polyethylene glycol monostearate, polyethylene glycol distearate, polyoxyalkylene glycol fatty acid such as polyethylene glycol monooleate Ester compounds;

Glyceryl monostearate, glyceryl monooleate, sorbitol monolaurate, sorbitol monopalmitate, sorbitol monostearate, sorbitol distearate, sorbitol tristearate, sorbitol monooleate, sorbitol dioleate, sorbitol trioleate. Ate, sorbitol tetraoleate, sorbitan monolaurate,
Sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan tristearate, sorbitan monooleate, sorbitan dioleate, mannitan monolaurate, mannitan monostearate, mannitan distearate, mannitan mono Polyhydric alcohols such as oleate, hexitan monolaurate, hexitan monopalmitate, hexitan monostearate, hexitane distearate, hexitan tristearate, hexitan monooleate, hexitan dioleate Fatty acid ester compound;

Polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan distearate, polyoxyethylene sorbitan monooleate, polyoxyethylene mannitan monopalmitate, polyoxyethylene mannitan mono Polyoxyalkylene polyhydric alcohol fatty acid ester compounds such as stearate, polyoxyethylene mannitane monooleate, polyoxyethylene hexitane monolaurate, polyoxyethylene hexitane monostearate, polyoxyethylene sorbitol tetraoleate; And polyoxyalkylene alkylamine compounds such as polyoxyethylene alkyl amines; alkyl alkanolamide compounds; and the like.

Among these, alkylene oxide is 2
More than one kind of block condensation polymer, polyoxyalkylene ether compound, polyoxyalkylene glycol fatty acid ester compound, polyoxyalkylene polyhydric alcohol fatty acid ester compound, polyoxyalkylene ether compound are preferable, and polyoxyalkylene glycol fatty acid ester. More preferred are system compounds, polyoxyalkylene polyhydric alcohol fatty acid ester compounds, and polyoxyalkylene ether compounds. These dispersants may be used alone or in combination of two or more.

The amount of the dispersant used is usually 0.1 to 6 based on the total weight, regardless of whether the solid carrier or the liquid carrier is used.
The range is 0% by weight, preferably 3 to 50% by weight, more preferably 5 to 45% by weight.

If desired, the crop growth regulator of the present invention may contain other auxiliary agents such as a wetting agent, a sticking agent and a disintegrating agent. The plant growth regulator of the present invention, if necessary, auxin, cytokinin, indoleacetic acid, gibberellin, ethylene and other plant hormone agents such as ethylene generator, fungicides, insecticides, herbicides,
An acaricide, an agricultural / horticultural germicide, a soil germicide, a soil conditioner, or a nematicide may be added. It is also possible to add fertilizers or other crop growth regulators.

The formulation form of the crop growth regulator of the present invention is not particularly limited. For example, emulsion, suspension, powder, wettable powder,
Examples thereof include granular wettable powders, granules, pastes, aerosols and the like.

The method for formulating the crop growth regulator of the present invention is not particularly limited, and conventionally known methods can be adopted.
For example, an emulsion can be obtained by thoroughly mixing an abscisic acid compound and a jasmonic acid compound together with a dispersant in an alcoholic liquid carrier such as propanol. The suspending agent can be obtained by adding an abscisic acid compound and a jasmonic acid compound to a water by adding a dispersing agent. The wettable powder is obtained by dissolving abscisic acid compounds or jasmonic acid compounds in a liquid carrier, adding a dispersant and / or a solid carrier to the resulting solution, mixing them well, and then removing the liquid carrier as necessary. be able to. The paste can be obtained by mixing abscisic acid compounds and jasmonic acid compounds with lanolin, vaseline and the like.

The content of the abscisic acid compound and the jasmonic acid compound in the crop growth regulator of the present invention is appropriately selected according to the kind of the target crop, application form, application method, application time and the like.

For example, when used in combination with a solid carrier, the content of abscisic acids is usually 0.001 to 45% by weight, preferably 0.01 to 25% by weight, based on the whole crop growth regulator. It is preferably in the range of 0.1 to 10% by weight. The content of the jasmonic acid compound is usually 0.001 to 1 with respect to the entire crop growth regulator.
It is 45% by weight, preferably 0.01 to 25% by weight, more preferably 0.1 to 10% by weight.

When used in combination with a liquid carrier, the content of abscisic acids is usually 0.001 to 45% by weight, preferably 0.01, based on the whole crop growth regulator.
-25% by weight, more preferably 0.1-10% by weight. The content of the jasmonic acid compound is usually 0.001 to 45% by weight, preferably 0.01 to 25% by weight, more preferably 0.1 to 10% by weight, based on the entire crop growth regulator. It is a range.

When the crop growth regulator of the present invention is a powder or paste, it can be applied directly to the crop or soil. When the preparation is a suspension, a wettable powder, a wettable granule, an emulsion or the like, a water-diluted solution diluted or dispersed with water to a predetermined concentration can be applied to the crop.

The water-diluted solution can be prepared by a conventional method. For example, it can be obtained by diluting a predetermined amount of the crop growth regulator with a predetermined amount of water. The concentrations of abscisic acid compounds and jasmonic acid compounds in the water diluent are appropriately selected according to the type of the target crop, application form, application method, application time and the like.

The concentration of abscisic acid is usually 0.01 to
3,000 ppm, preferably 0.1-1,500 pp
m, more preferably 0.1 to 1,000 ppm, most preferably 1 to 500 ppm. The concentration of the jasmonic acid compound is usually 0.01 to 1,000 p.
pm, preferably 0.1 to 500 ppm, more preferably 0.5 to 300 ppm, most preferably 1 to 100 p.
pm. When the concentration of the abscisic acid compound or the jasmonic acid compound is within the above range, a particularly excellent crop growth regulating action is exhibited.

(4) Method for Regulating Growth of Crop The method for regulating growth of a crop of the present invention is characterized in that the abscisic acid compound and the jasmonic acid compound represented by the above formula (1) are applied in combination to the crop. To do. As a method of applying abscisic acids and a jasmonic acid compound represented by the above formula (1) to a crop in combination, (a) a method of applying the crop growth regulator of the present invention to a crop, (b) abscidin A method in which an acid and a jasmonic acid compound are mixed immediately before application (tank mix) and applied to a crop, (c) each compound is separately absicidin within a period effective to exert a growth regulating effect on the crop. The method of applying an acid and a jasmonic acid type compound to a crop is mentioned. Among these, the method (a) is preferable because it is simple and an excellent crop growth regulating effect can be obtained.

When the method (a) is adopted, the crop growth regulator of the present invention may be applied to crops. When the methods (b) and (c) are adopted, a single agent containing an abscisic acid compound or a jasmonic acid-based compound is prepared, and the effect of each single agent is maintained immediately before the application of each agent or the effect of each agent is maintained. Both agents are applied before and after the same period, usually within 1 week, preferably within 3 days, and more preferably within 2 days. Incidentally, a single agent containing an abscisic acid compound or a jasmonic acid compound is a bulk powder, an emulsion, a suspension, a powder, a wettable powder, a granular wettable powder, a granule, a paste,
It may be formulated into an aerosol or the like.

The concentration of the abscisic acid compound and the jasmonic acid compound when applied to a crop is appropriately selected according to the kind of crop, action and effect, application method, etc., but as described above, the crop growth regulator of the present invention is used. A concentration similar to that when used as a water diluting solution is suitable in order to obtain a high crop growth control effect.

(5) Applicable crops The use ratio of the abscisic acid compound and the jasmonic acid compound applied to the crop is appropriately selected according to the kind of the crop, the action and effect, the application method, and the like. It is preferable that the mixing ratio of the abscisic acid compounds as the growth regulator and the jasmonic acid compound is the same in order to obtain a high synergistic effect.

The crop to which the crop growth regulator and the crop growth regulation method of the present invention are applied is not particularly limited. Examples of crops to be applied include fruits such as melons, grapes, apples, cherry, peaches, oysters, pears, mandarin oranges, strawberries, etc .; leaf vegetables such as cabbage, spinach, lettuce, komatsuna, shungiku; radish. Root crops that harvest roots such as beets, beets and potatoes; Grains such as rice, barley, wheat and corn; Fruits such as tomatoes, eggplants and cucumbers; Beans such as peas, adzuki beans and soybeans; Roses, chrysanthemums, budaldia and carnations , Sweet pea, gypsophila, gerbera, lily, gentian,
Orchids, gladiolus, eustoma, tulips,
Flowers such as stocks, statice, cyclamen, and saxifrage; industrial crops such as tea, tobacco, peanut, sugar cane, and konjac; Among these, fruits, fruit vegetables, leaf vegetables, root vegetables, beans, cereals, and flowers are preferable, fruits, fruit vegetables, and beans are more preferable, and fruits are particularly preferable. Among the fruits, fruit trees are preferable, and grape or sweet cherry is particularly preferable.

The part to be applied to the crop can be appropriately selected according to the kind of crop and the expected effect. Examples of application sites include seeds, flower buds, flowers (flower clusters), fruits (flower clusters), leaves,
Examples include stems, roots, and lumps. Among these, more effective application sites include seeds of leaf vegetables, beans, grains and the like; leaves and stems of root vegetables, leaf vegetables, beans, grains and the like; flower buds or flower bud precursors (flowering promotion); Flowers or inflorescences of fruits; flowers or inflorescences of fruits or fruits or clusters of fruits; and the like.

The application method is not particularly limited, and it is possible to employ the method that gives the best effect depending on the type of crop and the effect. Examples of the application method include a dipping method, a foliage spraying method, a soil watering method, a fruit surface spraying method, and a plant body injecting method.

(6) Growth-regulating action of crops As the growth-regulating action of crops obtained in the present invention, for example, rooting promotion, germination promotion, flower setting promotion, flowering promotion, growth promotion, fruiting rate improvement, fruit enlargement, It has actions such as accelerating maturity, improving coloring, improving sugar content, and preventing fruit fall. Among these, improvement of coloring, promotion of germination, promotion of flowering, promotion of growth, fruit enlargement, promotion of maturity and the like are preferable, and improvement of coloration, growth promotion, fruit enlargement and promotion of maturity are particularly preferable.

(I) The root-promoting action and germination-promoting action are obtained when applied to various crops. To obtain these effects, fruit vegetables, root vegetables, leaf vegetables,
It is preferably applied to beans and cereals, more preferably to root vegetables, beans and cereals. The application method in this case is not particularly limited, but a method of soaking seeds is preferable. Immersion treatment of seeds, the seeds in a chemical solution of the concentration of abscisic acids and jasmonic acid compounds similar to the water dilution, usually 0.1 to 48 hours, preferably 1 to 24 hours, more preferably 1 to 12 hours. It is performed by soaking for a time.

(Ii) The flower setting promoting action and flowering promoting action are obtained when applied to fruit vegetables, leaf vegetables, flowers and the like. In order to obtain these effects, it is particularly preferable to apply it to strawberries, spinach, etc., which require low-temperature treatment or long-day treatment for flowering. Further, when applied to greenhouse flowers such as carnations, summer chrysanthemums, cyclamen, primulas, and Miyakosures, an excellent flowering promoting effect can be obtained. Examples of the application method in this case include a method of spraying a plant body before flower bud differentiation.

(Iii) The growth promoting action is obtained when applied to various crops. In order to obtain this action, it is preferably applied to fruit vegetables, root vegetables, leaf vegetables, beans, grains and the like, and more preferably applied to leaf vegetables, root vegetables, beans and the like. Examples of the application method in this case include a method of foliar application at the time of young leaves (2 to 6 leaves) or 1 to 5 weeks before harvesting, preferably 2 to 3 weeks before harvesting.

(Iv) The fruit enlargement effect is obtained when applied to fruits. Among them, the case of applying to fruit trees is preferable, and the case of applying to grapes is particularly preferable.
There are no particular restrictions on the types of grapes applied. Examples include Delaware, Kyoho, Pione, Muscat Berry A, Muscat of Alexandria, Neo Muscat, Koshu, Himrod, Hiro Hamburg, Campbell Early, Niagara, and Takao.

For the purpose of fruit enlargement, abscisic acids and jasmonic acid compounds (or preparations containing them) are applied to flowers or fruits, and in the case of grapes, inflorescence or inflorescence. The application time in this case is from the beginning of flowering to the end of flowering, preferably about 4 weeks after full bloom, more preferably 1 to 3 weeks after full bloom, and most preferably 1 to 2 weeks after full bloom. is there. The number of times of application is 1 to several times.

The application time in this case is from 4 weeks before the planned full bloom to before the full bloom, preferably 1 day on the planned full bloom.
~ 3 weeks before, more preferably at least once 2 weeks before the planned full bloom, and up to 4 weeks after full bloom, preferably 1 to 3 weeks after full bloom, more preferably 1 to 1 full bloom.
Between two weeks. The number of times of application is 1 to several times.

(V) The maturity promoting action, sugar content improving action and coloring improving action have the effect of accelerating the harvest time. These effects are obtained when applied to fruits, and among them, it is preferable to apply them to fruit trees, and particularly to grapes. Examples of the application method include a method of dipping the fruit or the fruit cluster and a method of spraying, and the dipping method is preferable. The application time in this case is usually 1 to 5 weeks before harvest, preferably 2 to 4 weeks before harvest.

[0066]

The present invention will be described in more detail with reference to the following examples and comparative examples. The present invention is not limited to the following examples.

Production Example 1 Preparation of Liquid (1) 5 parts of natural abscisic acid and 15 parts of oleic acid ester of polyoxyethylene sorbitan were added to 40 parts of ethanol.
Solution A was dissolved in a mixed solvent of 40 parts of water and 40 parts of water to obtain a liquid preparation A.

Production Example 2 Preparation of liquid preparation (2) n-propyl (2-pentyl-3-oxo-cyclopentyl) acetate (generic name: prohydrojasmon) 5
And 15 parts of oleic acid ester of polyoxyethylene sorbitan were dissolved in a mixed solvent of 40 parts of ethanol and 40 parts of water to obtain a liquid preparation B.

Example 1 Growth promotion test of sweet cherry In a real cell of sweet cherry (variety name: "Red Shuho"), liquid agent A prepared in Production Example 1, liquid agent B prepared in Production Example 2, and liquid agent A and liquid agent B The liquid agent C prepared by mixing and was mixed so as to have the concentrations shown in Table 1, and was sprayed evenly on the leaves 2 weeks before harvesting. 2 weeks after spraying, harvested and fruit weight (g)
Was measured. In addition, the coloring state was evaluated on a scale of 5 by comparison observation, with 5 showing that the whole of the fruit was completely red and 1 showing yellow. The average weight and the average degree of coloring are shown in Table 1.

[0070]

[Table 1]

From Table 1, when natural abscisic acid was used in combination with prohydrojasmon (solution C), it was superior to natural abscisic acid alone (solution A) and prohydrojasmon alone (solution B). A growth promoting effect was recognized.

Example 2 Grape Maturation Acceleration Test Grape (variety name: “Pione”) seedlings were uniformly sprayed with the above-mentioned solution A, solution B and solution C on the leaves 3 weeks before harvest. Three weeks after the spraying treatment, harvesting was performed, and the tuft weight and the number of grains were measured to determine the average grain weight. In addition, the colored state was evaluated in the same manner as in Example 1 on a scale of 1 to 5. The sugar content (Brix%) was also measured. Table 2 shows the average grain weight, average coloring degree and average sugar content. The sugar content was measured with crushed grape juice using a refractometer.

[0073]

[Table 2]

From Table 2, when abscisic acid and prohydrojasmon are used in combination (solution C), growth promotion is superior to natural abscisic acid alone (solution A) and prohydrojasmon alone (solution B). The effect was recognized.

[0075]

Industrial Applicability According to the crop growth regulator and the crop growth regulation method of the present invention, the effects of promoting the maturation and enlargement of crops and increasing the yield can be obtained.

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Claims (2)

[Claims] 1. An active ingredient comprising at least one of abscisic acids and a compound of formula (1): (Wherein R ¹ represents a hydrocarbon group and R ² represents a hydrogen atom or a hydrocarbon group) and at least one kind of jasmonic acid compound represented by the formula Agent. 2. A method for controlling growth of a crop, which comprises applying the crop growth regulator according to claim 1 to the crop.