JPS5939803A - Plant growth regulator - Google Patents

Abstract

PURPOSE:To provide a plant-growth regulator containing a malonic acid anilide derivative as an active component, and useful as an agent for promoting the growth and ripening of a fruit, a flower thinning agent or a fruit thinning agent. CONSTITUTION:The objective plant-growth regulator contains the compound of formula (X is H, halogen, lower alkyl, or lower alkoxy; n is 1, 2 or 3; Ph is phenyl; R is H or lower alkyl) (e.g. 4-Me-PhNHCO-CH2COOEt), as an active component. The compound of formula is effective to promote as well as retard the data of ripening of tomato. When a blooming flower cluster is treated with the compound of formula, the blooming flowers are fallen, but the compound is inactive to the fertilized ovary. Accordingly, the ripening date can be made uniform by leaving the necessary number of fruits or removing the unnecessary flowers. The application concentration of the compound of formula is preferably 100-3,000ppm.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the formula [1] (X ), PhN11COCIl, C0OR (1) [wherein, X is a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, and n is 1 to 3 Ph represents a phenyl group, and R represents a hydrogen atom or a lower alkyl group. ]
The present invention relates to a plant growth regulator containing a malonic acid anilide derivative represented by the following as an active ingredient.

Plant hormones are generally thought to regulate plant growth, but in recent years there have been an increasing number of methods for regulating plant growth by externally applying plant hormones or related compounds.

This is the use of so-called plant growth regulators. Plant growth regulators that have been put to practical use include germination and rooting promoters, fruit thinning agents, fruit drop prevention agents, growth inhibitors, parthenocarpic agents, and the like. Broadly speaking, these technologies can be divided into (1) labor-saving technologies, (2) improvements in qualitative productivity, and (3) improvements in quantitative productivity, and their weight in agricultural technology is increasing. There is.

The present inventors discovered that the malonic acid anilide derivative represented by the above formula [1] has an activity different from that of existing plant hormones,
In addition, they discovered that it is a plant growth regulator with unique effects, including the effect of promoting fruit enlargement, the effect of regulating the ripening period of fruits, and the effect of deflowering plants. I have completed an invention related to its usage.

Gibberellins are already known as plant growth regulators that have the effect of promoting fruit enlargement, and gibberellins are used as enlargement and ripening promoters in grapes (Plauea species) and Japanese pears, but no other uses have been seen. However, this compound was found to have an effect of promoting fruit enlargement in apples and tomatoes.

In other words, in apples, the fruit clearly enlarged after the period of fruit drop, and in the case of tomatoes, during the green ripening and incandescent stages. Furthermore, the compound was applied to tomatoes during the green ripening stage.

The activity was divided into two groups: those that promoted coloring and those that delayed coloring. This is the structure of each individual compound.

Although they are similar, the relationship between auxin and antiauxin, which have opposite activities (similar to each other), is similar.Such promoting and suppressing effects can be reversed depending on the treatment concentration and timing. This is known to be a phenomenon that occurs very commonly with hormonal drugs.Therefore, this compound is a ripening-regulating agent that has both the ability to promote and suppress ripening.

Next, blooming tomato inflorescences were treated with the compound to cause the blooming flowers to drop. However, fertilization has already finished,
There was no effect on those with enlarged ovaries. Therefore, by treating flowers and fruits with different developmental stages with the compound at an appropriate time, it is possible to leave the required number of fruits or to remove unnecessary flowers. In other words, since it is possible to obtain fruits with a certain level of development, it is extremely advantageous to use one machine to harvest the fruits, as they can be harvested at the same ripening stage.

The concentration of the compound of the present invention is determined based on the intended use.

It varies depending on the type of target plant and other conditions.
O~5000ρpI11 is desirable, preferably 100
It is appropriate to use it at a concentration of about 3000 ppm.

When the plant growth regulator of the present invention is put to practical use, it can be mixed with various carriers depending on the usage situation and used as a solution, emulsion granule, etc. The carrier referred to herein may be either solid or liquid, or a combination thereof. Examples of these include clay, bentonite, talc, diatomaceous earth, water, and alcohol.

Examples include benzene, acetone, etc., and auxiliary agents used in the formulation of agricultural chemicals, such as spreading agents and emulsifiers.

A surfactant or the like may be used as appropriate.

Next, a more detailed explanation will be given by giving examples of formulations.

It is not limited only to these. In addition, in the following formulation examples, parts mean parts by weight.

Formulation Example 1 Liquid Formulation Compound of the Invention 3 parts Isopropanol 5 parts Water 92 parts The above components are uniformly mixed to form a liquid form. When used, it is diluted 10 to 300 times with water.

Formulation Example 2 Emulsion Compound of the present invention 30 parts Xylene 60 parts Trupol 2680 10 parts (mixture of nonionic surfactant and anionic surfactant, trade name of Toho Chemical Co., Ltd.) The above components are uniformly mixed to form an emulsion. When used, it is diluted 100 to 3000 times with water.

Formulation Example 3 Granule Compound of the present invention 3 parts CMC calcium salt 5 parts Bentonite 10 parts Clay 82 parts The above ingredients are uniformly mixed and pulverized and then compressed into granules.

Next, confirmation of practical effects when various plants are treated with the compound of the present invention will be specifically explained using test examples. However, the present invention is not limited to these.

In addition, in the test examples below 2, the numerical values are percentages of untreated, Ph is phenyl group, Me is methyl group,
Et represents an ethyl group.

Further, the two compounds of the present invention (1), (2), and (3) are as follows.

Compound of the present invention (1) 4-Me -PhNIICOC
112COOEtCompound of the present invention (2) PhN11C
OC1rQCOOEt Compound of the present invention (3) PhNl
IC0C1l□COO11 Test Example 1 Fruit enlargement promotion effect test (1) Seven-year-old Japanese apples planted in a clay pot with a diameter of 25 cm were used. After the menstrual fruit drop (fruit 1y!!
10-12 mm) + An aqueous solution of the compound of the present invention at a predetermined concentration was sprayed over the entire surface. Fruit insects appear during the ripening and coloring stage, 3 months after treatment.

Sugar content (by Atago refracting needle), acid (N / 10 N
Titration with a011) was measured. The results are shown in Table 1.

Table 1 Fruit enlargement promoting effect (1) Concentration ppm Fruit weight Sugar content No acid treatment -100100100 As is clear from Table 1, 400.2000pp in Himeru apples
Fruit enlargement was promoted in M.

Test Example 2 Fruit enlargement promotion effect test (2) An aqueous solution of the compound of the present invention at a predetermined concentration was sprayed over the entire surface of tomatoes (cultivar: Fukufuku No. 2) grown in the field during the incandescent and ripening stages. The fruit was harvested at the ripening stage when about half of the fruit was colored, and the fruit type was examined. The results are shown in Table 2.

Table 2 Fruit enlargement promoting effect (2) No treatment -100100 As shown in Table 2, the benzene ring is unsubstituted (the compound of the present invention (2)
)), the hypertrophy-promoting effect was seen at 400 ppm at all times. 4-Me substituted product (compound of the present invention (1)
), 2000 ppm in the incandescent period, 2000 ppm in the linear hot period,
Both 40°Oppm were effective.

Test Example 3 Wire heat jl of tomatoes (variety: Fukufuku No. 2) grown in the ripening period adjustment effect test field
An aqueous solution of the compound of the present invention at a predetermined concentration was sprayed over the entire surface of JI. When the untreated plants had become about half colored, they were harvested all at once and the degree of coloration was investigated. The results are shown in Table 3.

Table 3 Ripening period adjustment effect concentration ppm Coloration 400 2.8 No treatment -2,7 Judgment criteria for degree of coloration (indicated by the average value of 20 fruits) 0: Completely white edges 1 Partially colored 2: Only the top of the fruit Coloring 3: Some greenish white remaining 4: Completely colored As shown in Table 3, the benzene ring is unsubstituted (the compound of the present invention (2)
)), coloring was promoted at 2000 ppm. 4-
2000 for Me-substituted product (compound (1) of the present invention),
Test example 4 in which coloring was delayed for both 400pplll
An aqueous solution of the compound of the present invention at a predetermined concentration was sprayed only on the blooming inflorescences of tomatoes (Shinseki; Fukuju No. 2) cultivated in the flower thinning effect test field. After one week of treatment, the status of flowering and fruit set was investigated.

The results are shown in Table 4.

Table 4 Flower thinning effect concentration ppm Flower drop rate As shown in Table 4, the flower thinning effect was clearly shown, and the effect was higher with the 4-Me substituted product (the compound (1) of the present invention).

Patent applicant: Nissan Chemical Industries, Ltd.

Claims (9)

[Claims] (1) Formula [1] (X )%PhN11COC112COOR (1)' [
In the formula, X represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, n represents an integer of 1 to 3, Ph represents a phenyl group, and R represents a hydrogen atom or a lower alkyl group. ] A plant growth regulator containing a malonic acid anilide derivative represented by the following as an active ingredient. (2) Formula [2] 4-1? -PhN1100+':II□COO5C2)
[In the formula, R represents a hydrogen atom or a lower alkyl group, and Ph represents a phenyl group. The plant growth regulator according to claim 1, which contains a malonic acid anilide derivative represented by the following as an active ingredient. (3) Formula [3] PhNHCOCHUC00II (3) In the c formula, P
h represents a phenyl group. ] The plant growth regulator according to claim 2, which contains malonic acid anilide represented by the following as an active ingredient. (4) Formula [4] PhNlIC0CII, C00Et (4) In formula c,
The plant growth regulator according to claim ff12, which contains a malonic acid anilide derivative represented by the following formula: Ph represents a phenyl group and ht represents an ethyl group. (5) Formula [5] 4-Me-PhNtlCOCIIICOOEt (,
5) [In the formula, Me represents a methyl group, Ph represents a phenyl group, and F and t represent an ethyl group. ] The plant growth regulator according to claim 2, which contains a malonic acid anilide derivative represented by the following as a component. (6) The plant growth regulator according to claim 1, which is an agent for promoting enlargement or ripening of plant fruits. (7) Claim 1, which is a flower thinning or fruit thinning agent for plants
The plant growth regulator described in Section 1. (8) The plant growth regulator according to claim 2, 3, 4, or 5, which is an agent for promoting the enlargement or ripening of plant fruits. (9) Claim 2, which is a flower thinning or fruit thinning agent for plants.
The plant growth regulator according to item 1, 3, 4 or 5.