JPH0937650A - Increasing sales of Japanese radish - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To easily improve the yield of Japanese radish. A method for increasing the yield of radish, which comprises applying a gibberellin biosynthesis-inhibiting plant growth regulator to radish plants in the late extraction stage or root enlargement stage.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for increasing the yield of Japanese radish.

[0002]

2. Description of the Related Art Generally, when increasing the yield of Japanese radish, it is known to apply fertilizers such as nitrogen, phosphoric acid and potash, and select a high-yielding excellent variety by a breeding method.

[0003]

However, in the case of fertilizer application, it is necessary to apply an appropriate amount separately according to each growing season of the plant in order to maximize the effect of the fertilizer. Appropriate management that conforms to is also essential. Further, selection of high-yielding excellent varieties by the breeding method takes a long period of several years and requires a lot of labor in the meantime, but it is not always expected to dramatically increase the yield. Even if an excellent variety appears, it is not easy to use the variety in a wide area because the adaptability varies depending on the cultivation area.

[0004]

Under such circumstances, the present inventors have conducted diligent studies and as a result, as a result of applying a plant growth regulator showing a certain physiological action to radish plants at a specific time by foliage application. As a result, they have found that the yield of Japanese radish can be remarkably improved, and thus completed the present invention. That is, the present invention provides a method for increasing the yield of radish (hereinafter referred to as the method of the present invention), which comprises applying a gibberellin biosynthesis-inhibiting plant growth regulator to radish plants in the root secondary hypertrophy growth early or middle stage. .) Is provided.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The target plant of the present invention is a Japanese radish plant. The term "radish plant" as used herein means a plant belonging to the genus Raphanus, for example, Raphanus sativus var. Ra.
dicula PERS., Raphanus sativus var. niger PERS.,
Raphanus sativus var.major L., Raphanus sativus va
r. hortensis BACKER.

The drug used in the present invention is "gibberellin".
"Biosynthesis-inhibiting plant growth regulator". Gibberellin Osamu
Growth-inhibiting plant growth regulators include, for example, plant height extension.
It shows typical actions such as suppressing
Examples of such compounds include (E) -1- (4-chloro)
Phenyl) -4,4-dimethyl-2- (1,2,4-to)
Reazol-1-yl) -1-penten-3-ol
(Compounds described in JP-A-56-25105)
Or its salt, (2RS, 3RS) -1- (4-chloro)
Rophenyl) -4,4-dimethyl-2- (1H-1,
2,4-triazol-1-yl) pentan-3-o
(Compound described in JP-A-53-28170)
Or a salt thereof, (E) -1-cyclohexyl-
4,4-dimethyl-2- (1H-1,2,4-triazo
1-yl) -1-penten-3-ol
No. 55-111477)
Is its salt, rel- (1R, 2R, 6S, 7R, 8R,
11S) -5- (4-chlorophenyl) -3,4,5,
9,10-Pentaazatetracyclo [5.4.1. O
^2,6 . O ^8,11] Dodeca-3,9-diene (Short
Review of Herbicides & PG
Rs, 1990, Hodogaya Chemical Co., Ltd., page 316
Compound or its salt, etc.
Compound and 4'-chloro-2 '-(α-hydroxybenzyl
Le) Isonicotine anilide (Short Review)
 of Herbicides & PGRs, 199
0, Compounds described on page 306, Hodogaya Chemical Co., Ltd.
Products) and the like, and isonicotine anilide compounds and (RS) -2
-Methyl-1-pyrimidin-5-yl-1- (4-tri
Fluoromethoxyphenyl) propan-1-ol (rice
Japanese Patent No. 4002628 and Short Review
w of Herbicides & PGRs, 19
90, published in Hodogaya Chemical Co., Ltd., page 318.
Or a salt thereof, α-cyclopropyl-4-
Methoxy-α- (pyrimidin-5-yl) -benzyla
Rucor (UK Patent 1218623 and Short
 Review of Herbicides & P
GRs, 1990, Hodogaya Chemical Co., Ltd., 318
Compounds described on page) or salts thereof, such as pyrimidines
Examples include system compounds. These drugs may be used alone or in combination.
It may be a mixture of two or more species. Of course, optically active
In compounds having isomers, the plant growth regulating activity
It is also possible to use the optically active isomer having.

The gibberellin biosynthesis-inhibiting plant growth regulator as described above is usually an emulsion, solution, wettable powder or suspension prepared by using a liquid carrier, a solid carrier, a surfactant or other auxiliary agents for formulation. It is used as a formulation. These formulations usually contain the active ingredient in a weight ratio of about 0.00001 to about 99.9%.

Examples of the liquid carrier used include aromatic hydrocarbons such as xylene and methylnaphthalene, alcohols such as isopropanol, ethylene glycol and cellosolve, ketones such as acetone, cyclohexanone and isophorone, soybean oil and cottonseed oil. Examples thereof include vegetable oil, dimethylsulfoxide, acetonitrile, liquid compound fertilizer, water and the like. As the solid carrier, for example, kaolin clay, attapulgite clay, bentonite, acid clay, pyrophyllite, talc, diatomaceous earth, calcite,
Fine powder or granules such as walnut shell powder, urea, ammonium sulfate, chemical fertilizer, and synthetic hydrous silicon oxide can be used.

Surfactants used for the purposes of emulsification, dispersion, wetting, spreading, binding, disintegration control, active ingredient stabilization, fluidity improvement, rust prevention and the like are nonionic, anionic and cationic. Both ionic and zwitterionic can be used, but usually nonionic and / or anionic ones are used. Representative nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene polyoxypropylene block copolymer,
Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters and the like can be mentioned. Representative anionic surfactants include, for example, alkyl sulfates, alkyl (aryl) sulfonates,
Examples thereof include dialkyl sulfosuccinates and polyoxyethylene alkyl aryl ether phosphate salts.

Other auxiliary agents for the preparation include lignin sulfonate, alginate, polyvinyl alcohol, gum arabic, CMC (carboxymethyl cellulose), PAP (isopropyl acid phosphate) and the like.

The treatment concentration and treatment amount of the gibberellin biosynthesis-inhibiting plant growth regulator thus prepared vary depending on the kind of the plant growth regulator and the like. A solution of about 1000 ppm is used as an active ingredient amount of about 0.01 to about 50,000 g / ha, preferably about 0.01 to about 50 in the case of a triazole compound.
The amount is 00 g / ha, about 0.1 to about 50,000 g / ha in the case of isonicotiline anilide compounds, and about 0.01 to about 5000 g / ha in the case of pyrimidine compounds. Of course, when treating a gibberellin biosynthesis-inhibiting plant growth regulator, it is possible to mix with a fertilizer, an insecticide, a fungicide, a herbicide, or another plant growth regulator as long as the effect of the present invention is not impaired. Is.

Next, the time of spraying the drug in the present invention, that is, "root secondary hypertrophy growth initial stage or middle stage" will be explained. In the present invention, it is essential that the plant growth regulator as described above is applied to the radish plants in the early or middle stage of the secondary root hypertrophy growth in roots. In radish plants, enlarged roots and hypocotyls are used for food. In the plant, root growth as well as growth of the above-ground part is important for determining yield. At the root of Japanese radish, the differentiation of primary tissue, which is generally composed of epidermis, cortex, endothelium, and central pillar, is completed about 4 days after seed germination. Subsequently, a cambium is formed in the central pillar, which is then connected in a ring shape, forming a cambium ring, and differentiation and development of secondary tissues occur. This cambium forms xylem parenchyma cells and xylem ducts on the inner side, and the primary hypertrophy of roots starts. About 28 ~ after germination
From about 30 days, some parenchyma parenchyma cells recovered their active mitotic function, formed meristems, increased the number of cells, and started root hypertrophy due to secondary meristems, leading to the initial growth stage of secondary hypertrophy. Become. The parenchymal cells of the secondary meristems continue to actively divide and grow, and then expand while promoting maturation of the radish roots, and reach the middle stage of secondary hypertrophic growth. In the mature roots that have matured completely, the ability of parenchyma to divide is markedly impaired, the cell membranes become thickened and become lignified, and secondary hypertrophy ends. According to the present invention, the period of the second root hypertrophy growth in the early stage or the middle stage is weather, variety,
Generally after seed germination, it depends on cultivation conditions etc.
It is between about 28 days and about 60 days. Specifically, depending on the weather, cultivation conditions, etc., for example, in the spring radish "Shunfu", the seeding period is from mid-September to mid-October, and the secondary root hypertrophy growth stage or mid-stage is October. From late to early January, the harvest season is from mid-February to mid-March,
For "Ninenji" and "Tokinashi", the sowing period is from late September to early January, the second stage of root hypertrophy is from the beginning of November to the beginning of March, and the harvest period is from mid March to 5 Mid-month,
In "Kameido", the sowing period is from early October to late February, the second root hypertrophy of the root is in the early or middle period from early November to late April, and the harvest period is from mid-February to late May. In the case of "Early Minnow" and "Spring Mino", the sowing period is from early April to mid May, the second root hypertrophy at the root stage is from early May to early July, and the harvest period is 6 From the beginning of the month to the middle of July, in the case of "Kuroha Mino" and "Late afternoon", the sowing period is from late May to early August, and the second stage of root hypertrophy is from late June to September. The harvest period is from late July to late 1
In the beginning of October, in the autumn radish "Mino-saisei",
The sowing period is from early August to early September, the second stage of root hypertrophy is from mid-September to late-October, and the harvest period is from late September to early November. “Miyashige” and “Nerima”・ In "Awa Bansei", "Shirogari", and "Shogoin", the sowing period is from mid-August to mid-September, the second root hypertrophy stage or mid-September to late-November, and the harvest period is 10 1 from the end of the month
Early February, winter radish "Okura" and "Miura"
・ In the "Shoseiin", the seeding period is from early September to late September, and the root secondary hypertrophic growth is from early October to mid October.
It is in early February and the harvest season is from late December to mid March.

The chemical treatment method of the present invention is foliar application by spraying, dusting or the like.

[0014]

EXAMPLES The present invention will be described in more detail with reference to formulation examples and test examples, but the present invention is not limited to these examples. First, formulation examples are shown. In these preparation examples, parts represent parts by weight.

Formulation Example 1 (Emulsion) (E) -1- (4-chlorophenyl) -4,4-dimethyl-2- (1,2,4-triazol-1-yl) -1
-Penten-3-ol (hereinafter referred to as compound A) 5
Parts, polyoxyethylene styryl phenyl ether 10
Xylene to 50 parts of cyclohexanone and 50 parts of cyclohexanone to make 100 parts as a whole, and mixed by stirring to obtain an emulsion.

Formulation Example 2 (Wettable powder) (2RS, 3RS) -1- (4-chlorophenyl)-
4,4-Dimethyl-2- (1H-1,2,4-triazol-1-yl) pentan-3-ol (hereinafter referred to as compound B) 10 parts, sodium lauryl sulfate 5 parts and aromatic sulfonic acid Kaolin clay is added to 2 parts of the formalin condensate of the salt to make 100 parts in total, and well mixed with a juice mixer and then finely pulverized with a jet mill to obtain a wettable powder. Next, a test example is shown.

Test Example 1 Japanese radish (cultivar, disease-resistant total weight) was cultivated in the field,
At the initial stage of root hypertrophy growth (28 days after germination), a 10 ppm solution of Compound A prepared as a wettable powder according to Formulation Example 2,
The foliage was sprayed at a drug treatment amount of 200 L / ha. After cultivation for 64 days after germination, the yield was investigated. Yield 4 in 1 ward
The root weight was investigated for 10 consecutive strains per square meter, and the average value per strain was determined. The results of the yield survey are shown in Table 1. In addition, this test was performed in 1 section and 3 repetitions. The yield was calculated by averaging three replicates, and the control (untreated) was 10
The relative value was defined as 0%. As is clear from Table 1, in the plot of the present invention, an extremely high yield-increasing effect was exhibited as compared with the control plot (untreated plot).

[0018]

[Table 1]

Test Example 2 Test Example 1 except that the chemical spraying time of Compound A was changed to the root second secondary hypertrophy growth stage (41 days after germination) instead of the second root hypertrophy growth stage (28 days after germination). Tested in a similar manner to. The results are shown in Table 2. As is clear from Table 2, in the plot of the present invention, compared with the control plot (untreated plot),
It showed a very high revenue increase effect.

[0020]

[Table 2]

Test Example 3 A test was conducted in the same manner as in Test Example 2 except that 50 ppm was used instead of the drug treatment concentration of 10 ppm. Table 3 shows the results. As is clear from Table 3, the plot of the present invention showed an extremely high yield-increasing effect as compared with the control plot (untreated plot).

[0022]

[Table 3]

Test Example 4 A test was conducted in the same manner as in Test Example 2 except that Compound B [drug treatment concentration (ppm): 100] was used instead of Compound A [drug treatment concentration (ppm): 10]. As a result, a similar increase in sales was confirmed.

[0024]

According to the present invention, it has become possible to easily and significantly improve the yield of Japanese radish.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // C07D 213/81 C07D 213/81 249/08 519 249/08 519 523 523

Claims (4)

[Claims] 1. A method for increasing the yield of radish, which comprises applying a gibberellin biosynthesis-inhibiting plant growth regulator to radish plants in the early or middle stage of root secondary hypertrophy growth. 2. The method for increasing the yield of radish according to claim 1, wherein the gibberellin biosynthesis-inhibiting plant growth regulator is a triazole compound, an isonicotianilide compound or a pyrimidine compound. 3. The triazole compound is (E) -1- (4
-Chlorophenyl) -4,4-dimethyl-2- (1,
2,4-triazol-1-yl) -1-pentene-3
-All or a salt thereof, or (2RS, 3RS)-
1- (4-chlorophenyl) -4,4-dimethyl-2-
(1H-1,2,4-triazol-1-yl) pentan-3-ol or a salt thereof, or an isonicotine anilide compound is 4′-chloro-2 ′-(α-hydroxybenzyl) isonicotine anilide or a salt thereof. The method for increasing the yield of Japanese radish according to claim 2, which is salt. 4. (E) -1- (4-chlorophenyl)-
4,4-dimethyl-2- (1,2,4-triazole-
1-yl) -1-penten-3-ol or a salt thereof is applied to radish plants in the early or middle stage of secondary hypertrophy of roots for foliage application, which is a method for increasing the yield of radish.