JPH03130206A - Plant growth regulator and method for regulating plant growth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel plant growth regulator and a method for regulating plant growth using this novel plant growth regulator. More specifically, it is a plant growth regulator that contains at least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate as an active ingredient, and is mainly used to increase crop yield, improve cold resistance, and improve quality. and a method for regulating plant growth using this plant growth regulator.

[Prior Art and Problems to be Solved by the Invention] Up to now, many studies have been conducted to increase the yield and improve the quality of crops such as paddy rice. However, there are few that have been put to practical use. Therefore, the development of safe and effective drainage agents is desired.

Conventionally, 1-triacontanol has been known to regulate plant growth (for example, as disclosed in Japanese Patent Publication No. 61-40641. However, 1-) 1-triacontanol itself has poor reproducibility of its plant growth regulating effect in practice and the yield increase rate was also low, and it was not always possible to obtain a satisfactory plant growth regulating effect. The reason for this is that 1-triacontanol is extremely poorly soluble in water. emulsification method,
Although water dispersion methods and the like have been studied, it is said that it is extremely difficult to obtain a sufficient formulation and apply it uniformly to plants. For example, with 1-triacontanol prepared by ultrasonic dispersion, the dispersion state is broken due to low temperature, high temperature, vibration, etc., and precipitation occurs, so a stable effect cannot be obtained unless the dispersion is immediately prepared. There is a problem in product distribution that it cannot be stored properly.

In addition, regarding the synthesis method of 1-triacontyl phosphoric acid, 0
RGANIC PREPARATIONS AND PR
OCEDURESINT 13(1) 19-22(1
981).

On the other hand, CAN J PLANT SCI 60 (3)
(1980) 795-798 reported that as a result of treating wheat seeds with 1-triacontanol, 1-triacontyl phosphoric acid, l-triacontyl sodium sulfate, etc., these compounds had no growth promoting effect at all. It is stated that there was no. In addition, no reports have been found regarding test examples in which 1-triacontyl phosphate was used as a plant growth regulator. The inventor also studied paddy rice (
Although seeds of the cultivar Koshihikari were treated with 1-triacontyl phosphate, it was confirmed that clear effects such as growth promotion and yield increase were not obtained.

[Means for Solving the Problems, Effects] In order to solve the above-mentioned problems, the present inventors have intensively studied a large number of compounds.

As a result, 1-triacontyl phosphate and/or 1
- Salts of triacontyl phosphate meet the purpose, there is no phytotoxicity to crops, the formulation has great storage stability, and when applied to the foliage and roots, ■ - This is not seen in triacontanol. To demonstrate highly reproducible yield-increasing effects and quality-improving effects of extremely superior crops such as
The present invention was achieved by discovering that it exhibits remarkable plant growth regulating effects such as increased yield, improved quality, and improved cold resistance, particularly for grains, beans, tubers, vegetables, and fruit trees.

That is, the present invention provides 1-triacontyl phosphate and 1
-Salts of triacontyl phosphate (hereinafter sometimes referred to as 1-triacontyl phosphates without distinguishing between the two)
The present invention relates to a plant growth regulator containing at least one of the following as an active ingredient, and a method for regulating plant growth using this plant growth regulator.

The 1-triacontyl phosphoric acids used in the present invention are represented by the following general formula (1).

In the general formula (1), XI and x2 may be the same or different and represent a hydrogen atom, an alkali metal, an alkaline earth metal, an inorganic base such as an ammonium group, and the general formula (II) 2 R '-N-R'...(II) An organic base represented by 3. In the general formula (■), R', R2, R3, and R' are hydrogen atoms (except when all are hydrogen atoms), or alkyl groups, alkenyl groups, alkynyl groups, and hydroxy groups having at least 1 to 11 carbon atoms. It is an alkyl group, and these may be the same or different.

In the general formula (1), when both xl and X2 are hydrogen atoms, it represents 1-triacontyl phosphoric acid.

Examples of alkali metals or alkaline earth metals in the salts of 1-triacontyl phosphate that can be used in the present invention include sodium, potassium, and calcium. In addition, organic bases represented by the above general formula (formerly) include, for example, primary, secondary, and tertiary amines such as allylamine, jetanolamine, and triethylamine, and quaternary ammoniums such as choline. can give.

Examples of the 1-triacontyl compounds represented by the general formula (1) include 1-triacontyl phosphoric acid, 1-triacontyl phosphoric acid, 1-triacontyl phosphoric acid,
Triacontyl phosphate-hydrogen sodium salt, ■-triacontyl phosphate-disodium salt, 1-triacontyl phosphate-potassium hydrogen 1'Ql-triacontyl phosphate calcium salt, 1-triacontyl phosphate-hydrogen isopropylamine salt , 1-triacontyl phosphate diisopropylamine salt, 1-triacontyl phosphate-hydrogenbutylamine salt, 1-triacontyl phosphate nibutylamine salt,
1-triacontyl phosphate-hydrogen isobutylamine salt,
1-triacontyl phosphate diisobutylamine salt, ■-
Triacontyl phosphate-hydrogen allylamine salt, 1-triacontyl phosphate-hydrogen allylamine salt, 1-triacontyl phosphate-hydrogen propargylamine salt, ■-triacontyl phosphate-hydrogen diethanolamine salt, 1-triacontyl phosphate dihydrogen diethanolamine salt Examples include diethanolamine salt, 1-triacontyl phosphate-hydrogen triethylamine salt, 1-triacontyl phosphate-nitriethylamine salt, 1-triacontyl phosphoric acid-hydrogen choline salt, and 1-triacontyl phosphate dicholine salt. Among these i-triacontyl phosphoric acids, from a practical standpoint, it is preferable that they are easily water-soluble and inexpensive;
Tricontyl phosphate-hydrogen sodium salt, 1-triacontyl phosphate disodium salt, l-triacontyl phosphate-hydrogen potassium salt, ■-triacontyl phosphate-hydrogen triethylamine salt, ■-triacontyl phosphate-hydrogen isopropylene salt Bylamine salts and dicholine 1-triacontyl phosphate salts are preferred.

In addition, the plant growth regulator of the present invention contains 1-
Triacontyl phosphoric acids are suitably prepared and used in a suitable form such as a wettable powder, a liquid, a flowable (sol), or a driftless (DL) powder by a conventional method.

The carrier used in this preparation can be either solid or liquid, as long as it is commonly used for agricultural and horticultural chemicals, and is not limited to specific substances.

For example, representative examples of solid carriers include minerals such as kaolin, bentonite, clay, montmorillonite, talc, diatomaceous earth, mica, vermiculite, lime, calcium carbonate, apatite, white carbon, slaked lime, silica sand, ammonium sulfate, and urea. In addition to organic powders such as soybean flour, wheat flour, wood flour, tobacco flour, starch and vegetable powders such as crystalline cellulose, polymeric compounds such as petroleum resins, polyvinyl chloride, ketone resins, and dammar gum, etc. Examples include alumina, silicates, sugar polymers, highly dispersed silicic acid, and waxes.

Representative examples of liquid carriers include water and alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, 1so-propyl alcohol, butanol, ethylene glycol, and benzyl alcohol.

In addition, when preparing formulations such as wettable powders and flowable agents, various surfactants and emulsifiers are added as necessary for the respective purposes of dispersion, solubilization, wetting, foaming, lubrication, and spreading. can be used. Such surfactants include, for example, nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl esters, polyoxyethylene sorbitan alkyl esters and sorbitan alkyl esters; Anionic surfactants such as esters, alkyl sulfates, polyoxyethylene alkyl sulfates and arylsulfonates, e.g.
Cationic type surfactants such as laurylamine, stearyltrimethylammonium chloride and alkyldimethylbenzylammonium chloride and polyoxyethylene alkylamine as well as amphoteric type surfactants such as laurylbetaine, stearylbetaine and sulfate ester salts. Of course, the surfactants are not limited to these exemplified surfactants.

In addition to these, various adjuvants such as polyvinyl alcohol, carboxymethylcellulose, gum arabic, polyvinyl acetate, gelatin, casein, sodium alginate, and gum tragacanth can also be used.

In the present invention, when preparing the various preparations described above, each of the 11 preparations contains 1-triacontyl phosphate esters from o,ooooooi% to 95 stones (wt%: the same below).
, preferably in the range of 0.000001% to 90%. For example, in the case of powders and driftless powders, 0.000001% to
0.1%, 0.00001% to 7 for wettable powders and liquids
It can be contained within a range of 5%.

Furthermore, when using the agent of the present invention, it can also be used in combination with known plant regulators, fungicides, insecticides, liquid fertilizers, and the like.

This formulation may be prepared immediately before use (or may be prepared and stored prior to use).

The timing of application of the agent of the present invention varies depending on the type of crop, weather, production area, etc., and cannot be absolutely specified, but typical usage examples are as follows. Namely, paddy rice, upland rice, barley, wheat,
When the purpose is to promote ripening of grains such as beer barley and corn to increase yield and improve quality, it is applied to the foliage and foliage surfaces and roots of the grains from the two-leaf stage to the early stage of grain ripening.

Furthermore, if the purpose is to reduce sterility due to low temperature damage in paddy rice, it is applied to the grass leaves and roots between the panicle formation stage and the meiosis stage.

When the purpose is to promote ripening of paddy rice and wheat and increase yield, it is preferably applied to the grass leaves and roots between the 5-leaf stage and the heading stage.

When promoting the early growth of corn, it is preferably applied to the foliage or roots between the 2-leaf stage and the 5-leaf stage.

When the purpose is to promote ripening of corn and increase grain yield, it is preferably applied to grass leaves and silk threads from the ear formation stage to the silk thread extraction stage.

The dosage when applied to these cereals varies depending on the variety and the region of cultivation; - Although it cannot be generally specified, when applied to the foliage as an aqueous solution, 10a! ! The amount of the active ingredient is from 0.02 μmol to 0.2 mmol, preferably from 0.2 μmol to 5 mmol.

For example, if the purpose is to promote the ripening of legumes such as soybeans, adzuki beans, shikaku beans, and peanuts, and increase yield, it is applied to the foliage and roots of legumes from the flowering stage to the early stage of ripening.

The dosage when applied to these legumes varies depending on the variety and cultivation area, and cannot be generally specified, but for example, when applied to the grass foliage, the amount of active ingredient ranges from 0.02 μmol to 0.02 μmol per 10 a. 2 mmol,
Preferably it is 0.2 μmol to 0.15 mmol.

For example, when the purpose is to increase the yield of potatoes such as Yamato potatoes, long potatoes, potatoes, and sweet potatoes, it is applied to the foliage and roots 1 to 4 times from the stage of tuber formation to the early stages of tuber enlargement.

For example, in the case of potatoes, the tuber formation period and the tuber enlargement period correspond to the bud setting period and the full flowering period, respectively. The total amount of the drug when applied to these tubers varies depending on the variety and cultivation area, and cannot be generally specified, but for example, when applied to the foliage, 0.0% of the active ingredient per loa is applied.
．． 02 μmol to 0.8 mmol, preferably 0.4 μmol to 0.5 mmol.

When the purpose is to increase the yield and improve the quality of vegetable crops, the timing of application of the present invention varies depending on the type of vegetable, production area, weather, etc., and cannot be determined unconditionally. Apply to the surface and roots.

For example, if the purpose is to increase the yield of root vegetables such as radish, carrot, burdock, and taro, it is preferable to germinate
It is applied once or twice to the foliage and roots between one week and 1.5 months after germination.

For example, if the purpose is to increase the yield of fruit vegetables such as tomatoes, cucumbers, green peppers, melons, and Japanese strawberries, it is preferably applied to the foliage and roots in 1 to 4 times from 2 weeks after germination until the flowering stage. do.

For example, when the purpose is to increase the yield of leafy vegetables such as cabbage, lettuce, and spinach, it is preferably applied to the leaves and roots in 1 to 2 times from 1 week after germination to 1.5 months after germination. .

The total amount of the drug when applied to rapeseed vegetables varies depending on the variety and cultivation area, and cannot be generally specified, but for example, when applied to the stem and foliage surfaces, the amount of active ingredient ranges from 0.04 μmol to 0.00 μmol per 10 a. 4 mmol, preferably 0.4 μmol to 0.2 mmol.

For example, apples, grapes, peaches, and tangerines.

If the purpose is to promote the enlargement and improve the quality of fruits of fruit trees such as daikon, kiwifruit, pears, and persimmons, use the branches of fruit trees during the fruit enlargement period.

The agent of the present invention is applied to leaves and/or fruits.

The dosage when applied to these fruit trees varies depending on the variety and cultivation area, etc. - It cannot be generally specified, but when applied to the foliage surface, it is 0.04% as an active ingredient per 10a.
μmol to 0.8 mmol, preferably 0.8 mmol.
It is 4 μmol to 0.4 mmol.

When applying to the roots of crops instead of the above-mentioned application to the foliage surfaces of crops, aqueous solutions and granules are generally suitably used and applied to the soil where the roots are located.

The dosage when applied to the roots cannot be unconditionally determined depending on the type of soil, the depth of the roots of the crop, etc., but the dosage required is 2 to 20 times that when applied to the foliage surface.

That is, the amount of active ingredient per 10a is about 0.2 μmol to 16 mmol.

It is preferable to apply it to the foliage surface because a stable effect can be obtained with a small amount of the drug.

Root applications when applied to cultivation in closed systems such as pot cultivation, hydroponics and frame cultivation,
Medication doses can be saved.

The amount of liquid applied is the same for soil irrigation as in conventional cultivation.
Usually 1,000 to 10,000 Q per 10a,
Foliar spraying is usually 50-300Q per 10a.

The agent of the present invention can be suitably used as a plant growth regulator for grains, beans, potatoes, vegetables, and fruit trees.

[Example] The present invention will be explained in more detail with reference to Examples and Test Examples. However, the present invention is not limited to these examples.

In addition, all parts in Examples indicate parts by weight.

Example 1 rORGANIc PREPARATIONS A
ND PROCEDURES TNT13 (1
) 19-22 (1981) J. 1-triacontyl phosphoric acid was synthesized by the method described in J.

That is, 1.5 g of phosphorus oxychloride was dissolved in a mixed solvent of pyridine and methylene chloride, and the solution was cooled.
Add 0.91 g of Aldrich's reagent 1-triacontanol (purity 9, melting point 88-90°C) to a mixed solvent of pyridine and methylene dichloride, dissolve the solution by heating, and gradually dissolve the solution over 20 minutes. The mixture was added dropwise and stirring was continued for an additional 2 hours. This mixture was added to 10 g of ice to precipitate 1-triacontyl phosphoric acid. This precipitate was collected by filtration, washed with water and methanol, and then dried to obtain 0.9 g of white powder of 1-triacontyl phosphoric acid. (Melting point 93-95°C) Example 2 0.1 part of 1-triacontyl phosphoric acid, 15 parts of white carbon, 3 parts of calcium lignosulfonate, 1 part of polyoxyethylene nonylphenyl ether, ±5 parts of diatom, and 75 parts of clay. Nine parts were ground and mixed uniformly to obtain a wettable powder.

Example 3 1-triacontyl phosphate-potassium hydrogen 0.011%
0.5 part of aqueous solution, 0.5 part of silicic acid powder, 0.001 part of calcium stearate, 50 parts of clay, and 4 parts of talc.
A powder was obtained by uniformly mixing and pulverizing 8,499 parts.

Example 4 190 g of an aqueous solution containing 1.87 mg of choline base was added to warmed stock solution, and 1=triacontyl phosphate 6 was added to heated ethanol.
．． Gradually add 10 g of a solution in which 0 mg of
(referred to as Agent C) was obtained. The concentration of 1-triacontyl phosphate dicholine salt in this TPC agent is 30 ppm in terms of 1-triacontyl phosphate.

Example 5 180 g of an aqueous solution containing 0.432 mg of potassium hydroxide was heated, and 10 g of a solution of 4.0 mg of 1-triacontyl phosphate dissolved in warmed ethanol were gradually added and mixed uniformly. Further, 10 g of an aqueous solution containing 40 mg of polyoxyethylene alkyl allyl ether was gradually added to the solution and dissolved to obtain a liquid preparation of potassium hydrogen salt of 1-triacontyl phosphate (hereinafter referred to as TPK agent). The concentration of 1-triacontyl phosphate-hydrogen potassium salt in this TPK agent is 20 pp in terms of 1-triacontyl phosphate.
It is m.

Example 6 A solution Log of 10.0 mg of 1-triacontyl phosphoric acid dissolved in warmed ethanol was gradually added to a heated solution of 190 g of an aqueous solution containing 1.95 mg of triethylamine.
The mixture was dissolved to obtain a solution of 1-triacontyl phosphate-hydrogen triethanolamine salt.

The concentration of this 1-triacontyl phosphate-hydrogen triethylamine salt is 50% in terms of 1-triacontyl phosphate.
It is ppm.

Example Aqueous solution 190 containing 14 mg of fiisoprobilamine 1
10 g of a solution prepared by dissolving 10.0 mg of 1-triacontyl phosphate in warmed ethanol was gradually added to the heated solution to obtain a solution of 1-triacontyl phosphate-hydrogen isopropylamine.

The concentration of this 1-triacontyl phosphate-hydrogen isopropylamine salt is 50% in terms of 1-triacontyl phosphate.
It is ppm.

Test Example 1 In a 1/10,000 are plastic pot filled with field soil, three seeds each of feed corn (variety White Punto corn) were immersed in Benlate T-200 times solution overnight to sterilize the seeds. Seeds were sown, and after germination, one individual per pot was arranged in each pot.

At the two-leaf stage, the TPK agent of the present invention obtained in Example 5 was diluted with water to a predetermined triacontyl phosphate concentration,
For some of the pots, the foliage was sprayed with lomR/boft at an amount that sufficiently wetted the grass, and for the remaining pots, the soil was irrigated at an amount that sufficiently wetted the soil (200 mQ/boft).

In addition, as a comparative agent, a dispersion of ■-triacontanol was prepared in the same manner as in US Pat. No. 4,420,329. That is, 0.01 parts by weight of an aqueous solution of taloalkyl sulfate dissolved in water to a concentration of 10 ppm.
Part by weight of 1-triacontanol was added, heated to 90°C, and subjected to ultrasonic treatment to obtain a preliminary dispersion of 1-triacontanol. This preliminary dispersion was cooled to 20° C., and then large particles of 1-triacontanol were removed using a glass filter to prepare a dispersion having a 1-triacontanol concentration of about 90 ppm.

This dispersion was diluted with water to prepare a 1-triacontanol dispersion (hereinafter referred to as TR dispersion) having a concentration of 2-triacontanol of 20 ppm.

This TR dispersion was diluted with water to a predetermined concentration, and T
An R diluted solution was obtained, and this TR diluted solution was applied to the foliage and soil in the same manner and in the same amount as the agent of the present invention, and after the drug treatment, 1
Cultivation was carried out in a glass greenhouse (daytime: 25°C, night: 20°C) for several months, and the stems, leaves, and roots were each measured.

The results are shown in Table 1.

The dry weight of the stems and leaves of the untreated plot was 902 mg/plant, and the dry weight of the roots was 352 mg/plant.

Test Example 2 Seedlings of paddy rice (variety Koshihikari) were planted in a paddy field, and at each of the 8-leaf stage and the heading stage, the TPC agent of the present invention obtained in Example 4 was applied at a concentration of 1-triacontyl phosphate. is 0. A TPC diluted solution was obtained by diluting it with water to lppm, and this diluted solution was sprayed on the leaves at a rate of 100Ω per 10a. As a comparative agent, a TR dispersion prepared in the same manner as in Test Example 1 was further diluted with water to obtain a TR diluted solution.
The diluted solution was sprayed on foliage in the same manner as the agent of the present invention.

The test was conducted with 1 section of 6 m and 2.3 repetitions.

130 days after planting, the weight of brown rice was measured.

The results are shown in Table 2.

Table 2 The weight of brown rice in the untreated area was 553 kg/10'a.

Test example 3 Paddy rice (variety Yukihikari) was placed in a pot of 115,000 a.
One plant was planted and cultivated outdoors.

The agent of the present invention obtained in Example 4 on day 7719, which corresponds to the meiosis phase, was mixed with a concentration of 1-triacontyl phosphate of 0. lpp
The diluted solutions were diluted with water to a concentration of 0.3 ppm and 0.3 ppm, and each of these diluted solutions was sprayed on 30 ml of foliage per bot.

The plants were placed in a greenhouse maintained at 16°C for 6 days starting on day 7,729, 10 days before heading, to artificially cause sterility due to low temperature damage.

Ears that emerged within 10 to 15 days after starting the low-temperature damage treatment were marked, and after ripening, a fertility survey was conducted using tentacles.

In addition, TR prepared in the same manner as Test Example 1 was used as a comparative agent.
The dispersion was diluted with water to a predetermined concentration of 1-) liacontanol, and this diluted solution was added at 30% per pot.
0m2 of foliage was sprayed. The fertility rate was measured on the 125th day after planting.

The results are shown in Table 3.

The TR dispersion prepared as shown in Table 3 was diluted with water to a predetermined triacontanol concentration to obtain a diluted solution.

This diluted solution was sprayed onto grass leaves in the same manner as the agent of the present invention.

120 days after sowing, grain type was measured.

The results are shown in Table 4.

Table 4 Example 4 Corn (variety Heigenwase) was cultivated in the field, and during the silk thread extraction period, the agent of the present invention obtained in Example 4 was added at a concentration of triacontyl phosphate of 0.003PPII+, 0.01p.
pm and 0. A diluted solution diluted with water to give an O3 ppm was sprayed on foliage at a volume of 1002 per 10 a. In addition, as a comparative agent, test example 5 soybeans (variety Enrei) were cultivated in the field in the same manner as in Test Example 1, and the soybean obtained in Example 5 was used on July 5th, which is the beginning of flowering, and on August 10th, which is the beginning of ripening. The concentration of 1-triacontyl phosphoric acid in the TPK agent of the invention was 0. Diluted solutions were obtained by diluting with water to O3ppm and 0.1ppm, and each diluted solution was sprayed on stem vegetables at a liquid amount of 1009 per 10a. In addition,
As a comparative agent, a TR diluted solution prepared in the same manner as the TR diluted solution prepared in Test Example 1 was sprayed on foliage in the same manner as the present invention agent.

A yield survey was conducted 135 days after sowing.

The results are shown in Table 5.

Table 5 Test Example 6 Potatoes (variety Danshiyaku) were cultivated in the field, and the TPC solution of the present invention agent obtained in Example 4 was obtained by cultivating potatoes (variety Danshiyaku) alone or repeatedly at each of the bud setting stage, the beginning of flowering, and the peak flowering stage. 1
- The concentration of triacontyl phosphate is 0. Dilute with water to obtain O3ppm, and dilute these diluted solutions with 10
Each was sprayed on the foliage at a liquid volume of 1,002 kg/a. In addition,
As a comparison agent, a TR diluted solution prepared in the same manner as in Test Example 1 was sprayed on foliage in the same manner as the present agent.

A yield survey was conducted 170 days after sowing.

The results are shown in Table 6.

The grain size of the untreated plot was 397 kg/10a.

The potato weight in the untreated plot was 2,750 kg/10a.

Test Example 7 Daikon radish (no variety) was cultivated in the field, and one month after sowing, the liquid preparation of the agent of the present invention obtained in Example 5 was added to the solution with a concentration of 1-triacontyl phosphate of 0. O2ppm and 0, O4ppm
Dilute with water to obtain a diluted solution, and use these diluted solutions as
Each was sprayed on foliage at an amount of 602 per 10a.

In addition, TR prepared in the same manner as Test Example 1 was used as a comparative agent.
The diluted solution was sprayed on foliage in the same manner as the agent of the present invention.

A live weight survey was conducted during the harvest period 152 days after sowing.

The results are shown in Table 7.

Table 7 Example 8 The agent of the present invention obtained in Example 5 was applied to the branches, leaves, and fruits of a peach tree (10 years old, mainly 1 variety Shiratama) 60 days after flowering, which is the middle stage of fruit enlargement. The TPK agent was mixed with 1-triacontyl phosphate at a concentration of 0, O3ppm and O;O5.
The solution was diluted with water to a ppm, and 3,002 kg per 10 a was sprayed on each of these diluted solutions. In addition,
As a comparative agent, a TR diluted solution prepared in the same manner as in Test Example 1 was also sprayed in the same manner as the present invention agent.

After 98 days of flowering, several varieties were tested for fruit weight and sugar content.

The results are shown in Table 8.

Margin below The live weight of the untreated plot was 3,980 kg/10a.

Table 8 Test Example 9 TPK agent of the present invention agent obtained in Example 5 and Test Example 1
A TR dispersion prepared in the same manner as above was stored in a refrigerator at 5° C. for one month.

Table 9 shows the R observation results of the state of the TPK agent and TR dispersion liquid immediately after preparation and after storage in a 5°C refrigerator for one month.

In addition, the TPK agent and TR dispersion that had been stored in a refrigerator at 5°C for one month were diluted with water to a predetermined concentration. Corn plants at the two-leaf stage were treated with foliage spraying.

After spraying, we kept it in a glass greenhouse for 29 days (25°C during the day and 20°C at night).
The plants were cultivated at a temperature of 15°C (°C), and the stems, leaves, and roots were measured. The results are shown in Table 10.

Note that the untreated area in this test example is the same as the untreated area in Test Example 1.

In addition, in the test of Test Example 1, T
The PK agent and the TR dispersion were each diluted with water and immediately subjected to foliage spraying treatment.

The dry weight of the stems and leaves of the untreated plot was 902 mg/plant, and the dry weight of the roots was 352 mg/plant.

〔Effect of the invention〕

The agent of the present invention has a high storage stability as a formulation, and is effective in improving the quality and increasing yield of grains such as rice and corn, legumes such as soybeans, tubers such as potatoes, vegetables such as radish, and fruit trees such as peaches. Shows remarkable plant growth regulating effect.

Claims (6)

[Claims] (1) A plant growth regulator containing at least one of 1-triacontyl phosphoric acid and a salt of 1-triacontyl phosphate. (2) A method characterized by applying at least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate to the foliage surface or roots of cereal crops between the two-leaf stage and the early stage of ripening. Method for regulating plant growth of cereal crops. (3) Legumes characterized in that at least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate is applied to the foliage or roots of the legumes from the flowering stage to the early stage of ripening. Methods for regulating plant growth of crops. (4) At least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate is applied to the foliage or roots of the tuber crop from the stage of tuber formation to the early stage of enlargement. A method for regulating plant growth of tuber crops. (5) Vegetables characterized in that at least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate is applied to the foliage or roots of the rapeseed from the early stage of growth to the middle stage of growth. method for regulating plant growth. (6) A fruit tree plant characterized in that at least one of 1-triacontyl phosphate and a salt of 1-triacontyl phosphate is applied to branches, leaves and/or fruits of the fruit tree during the fruit enlargement period. Growth regulation method.