JP3255192B2 - Plant growth regulator and plant growth regulation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant growth regulator, particularly to an apple and oyster coloring accelerator, and to a plant growth regulating method, particularly to an apple and oyster coloring promotion method.

[0002]

BACKGROUND OF THE INVENTION As plant growth regulators, auxins, gibberellins, cytokinins, ethylenes and the like have hitherto been known. Gibberellin is actually a plant growth promoter having a practical effect, and as a rooting promoter,
There are auxins such as IAA (indole acetic acid) and NAA (α-naphthalene acetic acid), and as anti-aging agents there are cytokinins such as kinetin (6-furfurylaminopurine) and benzyladenine.

As a technique for increasing the coloration of apples and promoting maturation for about one to two weeks, a 3,000 to 5,000-fold solution of a Madek emulsion containing 20% of MCPB (ethyl 2-methyl-4-chlorophenoxybutyrate) is to be harvested. It is practical to spray 30 to 20 days before.

The present inventors have found in Japanese Patent Application Laid-Open No. 61-115501 that choline salts are effective in increasing the yield of various crops. Choline salts have an effect of promoting rooting of rice, an effect of promoting photosynthesis of wheat, and an effect of increasing the yield of onions, sweet potatoes, and onions. However, the action of choline salts on plant growth regulators is not always sufficient, and further improvement is desired. On the other hand, 2-
(4-Chloro-2-methylphenoxy) propionic acid (common name mecoprop) is mainly used as a turf herbicide.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a plant growth regulator having a sufficient plant growth regulating effect by utilizing the action of choline, and to provide a useful plant growth regulating method. .

[0006]

Means for Solving the Problems The present inventors added various compounds for the purpose of improving the action and effect of choline salts, and conducted field tests. As a result, 2- (4
-Chloro-2-methylphenoxy) propionate, specific high plants not found when using choline salt and 2- (4-chloro-2-methylphenoxy) propionate alone. Exhibiting a growth-regulating effect, particularly a specific high effect not seen when using choline salt and 2- (4-chloro-2-methylphenoxy) propionate alone for enhancing the coloration of apples and oysters, respectively. The present invention has been found, and the present invention has been accomplished.

That is, the present invention provides a plant growth regulator comprising choline and / or a salt thereof, and 2- (4-chloro-2-methylphenoxy) propionic acid and / or a salt thereof, and This is a method for regulating plant growth using choline and / or a salt thereof and 2- (4-chloro-2-methylphenoxy) propionic acid and / or a salt thereof.

[0008] The choline salt used in the present invention is a hydrochloride,
Inorganic salts such as phosphates, polyphosphates, sulfates, nitrates, silicates, and carbonates; and organic acid salts such as acetate, citrate, and lactate L (+) tartrate. Choline) and phosphates (choline phosphate) are most preferred, and mixtures of two or more of these salts are also used. Table 1 shows an example of the physical properties of these choline salts.

[0009]

TABLE 1 Choline salts properties choline chloride 70% aqueous solution of specific gravity 1.095 (25 ℃), pH 7.0 phosphate choline mp 200-205 ° C. choline bitartrate (tartrate) mp 149-153 ° C. citrate dihydrogen choline (citrate ) Melting point 105-107.5 ℃

The active ingredient 2- (4-chloro-2)
(-Methylphenoxy) propionate is widely used as a herbicide and is easily obtained by synthetic methods.

The plant growth regulator of the present invention can be formulated as a wettable powder by mixing these active ingredients with, for example, talc, bentonite, clay or the like, or dissolved in water and formulated into a liquid formulation for use. You can also. Further, it is preferable to add a spreading agent to the agent of the present invention in order to make these agents easily adhere to and penetrate crops. Also, it can be used in combination with liquid fertilizer, fungicide and insecticide. As the spreading agent, for example, one or more nonionic spreading agents such as alkylphenol polyethylene glycol ether and polyoxyethylene alkyl allyl ether, and a cationic spreading agent such as ligninsulfonic acid are used in combination. be able to.

In the method for regulating plant growth of the present invention, choline salt and 2- (4-chloro-2-methylphenoxy) propionate are dissolved in, for example, water and used as an aqueous solution containing both compounds. When using, a spreading agent,
Liquid fertilizers, fungicides and insecticides can be used in admixture.

The use time of the agent of the present invention and the method of the present invention varies depending on the type of crop, but it is preferable for fruit trees to be from 70 days before harvest to 10 days before harvest. In particular, 60 days before harvest and 10 days before harvest are preferable for enhancing the coloring of apples and oysters.

When the agent of the present invention is used after being diluted with water or when the method of the present invention is used, the concentration of the active ingredient is 300 to 3,000 ppm for a choline salt. Preferably, it is 500-1500 ppm, and 2- (4-chloro-2-methylphenoxy) propionate is 30-500 ppm. Preferably it is 40 to 300 ppm.
Choline salt and 2- (4-chloro-2-methylphenoxy)
The mixing ratio (weight ratio) of the propionate is 1: 0.01 to 1: 1, preferably 1: 0.03 to 1: 0.5.

[0015]

Next, the content of the present invention will be described in more detail with reference to formulation examples and test examples of the plant growth regulator of the present invention. Formulation Example 1 (Wettable powder) 30 parts by weight of choline phosphate, 10 parts by weight of potassium 2- (4-chloro-2-methylphenoxy) propionate, 5 parts by weight of sodium dodecylbenzenesulfonate, polyoxyethylene alkyl allyl ether 2 Parts by weight and 53 parts by weight of talc were uniformly mixed and pulverized. This wettable powder is generally 200 to
Use diluted 600 times with water.

Formulation Example 2 (Liquid) 50% by weight of 75% choline chloride, 1.5 parts by weight of 2- (4-chloro-2-methylphenoxy) propionic acid, 2 parts by weight of polyoxyethylene alkyl allyl ether, lautylmethyldihydroxyethyl A solution (aqueous solution) was prepared by uniformly dissolving 1 part by weight of ammonium chloride in 45.5 parts by weight of water.

Test Example 1 On September 20 (47 days before harvest), an apple (cultivar Fuji) tree was
Each agent was sprayed on the backpack type semi-automatic sprayer so that the fruits and leaves were sufficiently wetted (about 4 L per tree). 1 ward, 1 tree, 3
It was repeated. On November 6, thirty fruits were examined indiscriminately from each test tree, and the average value was shown. The evaluation of the coloring was expressed as 1 for poorly colored fruits and 5 for the coloration considered to be ideal. Table 2 shows the results.

[0018]

[Table 2] Table 2 Treatment area Sugar content Hardness Acidity Coloring (%) (lb) (mg / dL) 1 ^* 14.4 13.8 0.34 4.5 2 ^* 13.5 14.0 0.36 3.2 3 ^* 13.5 14.2 0.37 3.5 4 ^* 13.2 14.0 0.37 3.0 * 1; Choline phosphate (concentration in spray solution 1,000 ppm) and potassium 2- (4-chloro-2-methylphenoxy) propionate (concentration in spray solution 50 ppm) 2; Choline phosphate (concentration in spray solution 1,000 ppm) 3; Potassium 2- (4-chloro-2-methylphenoxy) propionate (concentration in the spray liquid: 50 ppm) 4; No treatment Outline of effect: No. 1 group showed a coloring promoting effect. In particular, the effect of improving the coloring of fruits in the lower branches and shaded areas could be clearly identified.

Test Example 2 On August 5th, an apple (variety Tsugaru, rootstock M.26) tree (14th grade) was sprayed with each agent using a backpack-type automatic sprayer so that the fruits and leaves were sufficiently wetted (1). About 8L per tree). In addition, each section had 1 tree, 1 tree and 3 repetitions. August 23, August 30, September
On the 6th, the fruits that reached the optimal harvest time were harvested, and the number of harvested fruits was counted. The quality of the fruits harvested on August 23 was investigated. Evaluation of coloring was performed in the same manner as in Example 1. Table 3 shows the results
And Table 4.

[0020]

[Table 3]Table 3 Processing zoneHarvest time August 23 August 30 September 6 Total(%) (%) (%) (%) 1^* 63 27 7 100 (313) 2^* 12 33 55 100 (253) 3^* 10 33 57 100 (297) 4 ^* 9 40 51 100 (323) * 1: Choline chloride (1,000 ppm) and 2- (4-
Rolo-2-methylphenoxy) propionic acid potassium salt
(45 ppm) 2; choline chloride (1,000 ppm) 3; 2- (4-chloro-2-methylphenoxy) pro
Potassium pionate (45 ppm) 4; 2- (2,4-dichlorophenoxy) propion
Acid triethanolamine salt (= dichloroprop) (45pp
m) (comparative agent)

[0021]

[Table 4 treated group hardness Brix acidity coloring (lb) (%) (mg / dL) 1 * 14.7 13.5 0.33 4 2 * 14.5 13.3 0.36 2 3 * 14.8 13.3 0.35 2 4 * 14.8 13.0 0.36 2 * 1; Choline chloride (1,000 ppm) and potassium 2- (4-chloro-2-methylphenoxy) propionate
(45 ppm) 2; choline chloride (1,000 ppm) 3; 2- (4-chloro-2-methylphenoxy) propionic acid potassium salt (45 ppm) 4; 2- (2,4-dichlorophenoxy) propionic acid triethanolamine salt (= Dichloroprop) (45pp
m) (comparative agent)

Test Example 3 On September 20 (30 days before harvest), persimmon trees (variety: Matsumoto Sayo Tomiyu) were sprayed with a semi-automatic sprayer on a persimmon tree so that the fruits and leaves were sufficiently wetted (approximately per tree). 5 L). In addition, 1 ward 1
The tree was repeated 3 times. The fruits were harvested all together on October 15, and 30 fruits were surveyed indiscriminately from each test tree, and the average value was calculated. The evaluation of coloring was carried out by examining the skin color using a color chart for shaving. Table 5 shows the results.

[0023]

[Table 5] Table 5 Treatment zone Fruiting sugar Hardness Coloring (g) (%) (lb) (color chart ) 1 ^* 242 16.4 1.8 4.7 2 ^* 220 15.8 1.9 3.5 3 ^* 217 15.7 2.0 3.8 4 ^* 216 15.7 2.2 3.0 * 1; choline phosphate (1,000 ppm) and 2- (4-
Chloro-2-methylphenoxy) propionic acid potassium salt (20 ppm) 2; Choline phosphate (1,000 ppm) 3; 2- (4-chloro-2-methylphenoxy) propionic acid potassium salt (20 ppm) 4;

[0024]

According to the present invention, when applied to fruit trees such as apples, oysters, pears, and citrus fruits, they are effective in preventing late-stage fruit dropping and setback dropping. Particularly in apples and oysters, the effect of promoting coloring and promoting the ripening period can be obtained without impairing the fruit quality.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-106728 (JP, A) JP-A-5-85906 (JP, A) JP-A-62-167704 (JP, A) JP-A-6-167704 172114 (JP, A) JP-A-3-24002 (JP, A) JP-A-63-284103 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01N 39/02 A01N 33 / 12

Claims (2)

(57) [Claims] (1) Choline and / or a salt thereof, and 2- (4
-Chloro-2-methylphenoxy) propionic acid and / or a salt thereof. 2. Choline and / or a salt thereof and 2- (4
-Chloro-2-methylphenoxy) a method for regulating plant growth using propionic acid and / or a salt thereof.