JPH02193902A - Treating agent for tea plant - Google Patents

Abstract

PURPOSE:To obtain a treating agent for tea plant providing excellently increasing effects on yield of tea leaf, quality improving effects, safely usable, containing choline or a salt thereof as an active ingredient. CONSTITUTION:0.001-95wt.%, preferably 0.01-90wt.% choline or at least one salt thereof is used as an active ingredient and, for example, in the case of powder or driftless powder, 0.01-5wt.% choline or at least one salt thereof is contained and in the case of wettable powder or solution, 1-75wt.% choline or at least one salt thereof is contained to give a treating agent for tea plant promoting growth of buds and leaves of tea, exhibiting improving effects on yield and qualities of tea leaves, not bringing about phytotoxicity to tea plants, not polluting environments and not having bad influence on human and animals.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel treatment agent for tea plants. More specifically, the present invention relates to a treatment agent for tea plants that contains at least one of choline and its salt as an active ingredient and is mainly used to increase the yield and improve the quality of tea.

[Conventional technology]

Conventionally, sweet potato seedlings have been soaked in a choline solution to promote rooting (Japanese Patent Publication No. 61-58441), and fruit trees such as oysters, peaches, and grapes have been treated with these treatments. It is known that this method has the effect of improving quality, such as greatly increasing accuracy and improving accuracy (Japanese Patent Application Laid-open No. 189209/1983).

However, no reports have been found that have been found to promote the growth of tea plants by treating them with choline and/or its salts, and to increase the yield and improve the quality of tea confections.

On the other hand, the picking time is extremely important for tea producers.
In particular, the rating of first-class tea, which sprouts from February to March and is picked from late April to early May, is about three times that of second- and third-grade tea. For this reason, it is desired for tea producers to accelerate the harvesting period and increase the yield of tea confectionery.

Therefore, the use of gibberellin to promote the elongation of tea plant buds and increase yield has been reported ("Chemical Regulation of Plants" Vol. 5, No. 14).
Pages 2 to 154 (1970)) and 6- (N-
Improvement of the quality of tea using benzylaminopurine (Japanese Unexamined Patent Publication No. 105058/1983) has been studied.

However, no drug has yet been put to practical use.

[Problem that the invention seeks to solve]

Until now, no drug has been developed that can be expected to increase the yield of tea leaves. Therefore, the development of safe and effective drugs is desired.

Therefore, the present invention promotes the growth of tea buds and leaves by spraying on tea plants, has the effect of increasing yield, does not adversely affect the quality of tea leaves before picking, and mainly increases the yield of tea confectionery. The purpose of the present invention is to provide a treatment agent for tea plants to improve quality.

[Means and effects for solving the problem] The present inventors,
In order to solve the above-mentioned problems, a large number of compounds were intensively studied. As a result, the present invention was achieved by discovering that Corinthe and/or its salts meet the purpose, cause no phytotoxicity to tea plants, and exhibit excellent effects on increasing the yield and improving the quality of tea confections.

That is, the present invention is a tea plant treatment agent characterized by containing at least one kind of choline or its salt as an active ingredient.

In the present invention, purines and/or their salts (hereinafter sometimes referred to as cholines without distinguishing between the two) are used as active ingredients, but the purine salts that can be used in the present invention are known per se. Typical examples include, but are not limited to, salts of inorganic acids such as hydrochlorides, phosphates, polyphosphates, sulfates, nitrates, silicates, and carbonates, as well as acetates, citrates, and lactic acids. salts, salts of organic acids such as L(+)tartrate, and the like.

In addition, the treatment agent for tea plants of the present invention contains choline compounds in a conventional formulation such as a wettable powder, liquid, flowable (sol), powder, etc.
It can be prepared in an appropriate form such as a driftless (DL) powder.

The carrier used at this time may be either solid or liquid as long as it is commonly used for agricultural and horticultural chemicals, and is not limited to any particular carrier.

For example, representative examples of solid carriers include kaolin, bentonite, clay, montmorillonite, talc, diatomaceous earth, mica, permiekierite, gypsum, calcium carbonate, apatite, white carbon, slaked lime, silica sand, ammonium sulfate, and urea. Mineral 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, dammar gum, etc. Other examples include alumina, silicates, stacked polymers, highly dispersed silicic acids, 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, various surfactants and emulsifiers can be used for the purposes of dispersion, solubilization, wetting, foaming, lubrication, spreading, etc., as necessary when formulating wettable powders, flowable agents, etc. . Such surfactants include, for example, nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, ethylene sorbitan alkyl ester, and sorbitan alkyl ester; for example, alkylbenzene sulfonates, alkyl sulfosuccinates; , alkyl sulfates, polyoxyethylene alkyl sulfates and aryl sulfonates with surfactants, e.g., Lauri A/7
17, cationic surfactants such as stearyltrimethylammonium chloride and alkyldimethylbenzylammonium chloride and polyoxyethylene alkylamine, and amphoteric surfactants such as laurylbetaine, stearylbetaine and sulfate ester salts. Of course, the invention is not limited to these examples.

In addition to these ingredients, various auxiliary agents such as polyvinyl alcohol, carboxymethyl cellulose, 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, the various preparations contain choline in the range of 0.001% to 95% (weight %: the same hereinafter), preferably 0.01% to 90%. It can be formulated as follows. For example, in the case of powders and driftless powders, 0.01% to 5%
%, and in the case of wettable powders and liquid preparations, it can be contained in the range of 1% to 75%.

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.

The timing of application of this invention agent varies depending on the variety of tea plants, tea leaves, and production areas, etc., and cannot be definitively determined;
When the purpose is to improve quality, in practice it is generally about 30 days to about 5 days before the scheduled harvesting date, which corresponds to approximately the period from the budding stage to the second leaf development stage. Furthermore, it is preferably from about 30 days to about 10 days before the scheduled harvesting date, which corresponds to the period from the budding stage to the first leaf development stage.

The dosage during this period is 1 to 1001 i/10 are as purines (choline base equivalent).
It is about 1 g, preferably about 2 to 400 g.

In addition, when the purpose is to increase the yield and improve the quality of second and third tea, the timing of application is from immediately after picking the first tea to about 15 days after picking the first tea, and for the third tea, , from immediately after second tea picking to about 15 days after second tea picking.

The amount of choline applied during this period was 2 to 400 choline per 10 ares. ! It is about i+.

In the case of powders and driftless powders, each is sprayed in its original form on 1 to 3 edges per 10 ares.

In the case of irrigation agents, flowable agents, and liquid agents, each is dissolved in a solvent or water, and the amount of sprayed liquid is 9,100 to 5,000 per 10 ares for normal spraying. Preferably it is 150 to 300, and in the case of high concentration and small amount spraying, it is 10 to 991 per 10 are. Preferably 25-70j
You can spray it on the foliage.

〔Example〕

The formulation of the agent of the present invention will be explained in more detail with reference to Examples. However, the present invention is not limited to these examples.

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

Example 1 Wettable powder 15 parts of purine phosphate, 15 parts of white carbon, 3 parts of calcium lignin sulfonate, 2 parts of polyoxyethylene nonylphenyl ether, 5 parts of diatom and 60 parts of clay were pulverized and mixed uniformly. A hydrating agent was obtained.

Example 2 Powder choline citrate 0.5 part, hydroxysilicic acid fine powder 0.5 part,
A powder was obtained by uniformly mixing and pulverizing 0.5 parts of calcium stearate, 50 parts of clay, and 48.5 parts of talc.

Example 3 Liquid Agent 17 parts of choline hydrochloride (choline chloride), 2 parts of polyoxyethylene nonylphenyl ether, and 81 parts of water were uniformly mixed to obtain a liquid agent.

Next, the usefulness of the tea plant treatment agent of the present invention will be illustrated in more detail through test examples.

Test Example 1 A solution containing choline chloride prepared in the same manner as in Example 3 was applied to a tea plant (variety: Yabukita) at the budding stage corresponding to 24 days before plucking or at the first leaf development stage corresponding to 14 days before plucking. 150-e per 10 are of each chemical solution with a specified concentration.
1 was sprayed over the entire tea plant.

Then, on April 30th, the seeds were picked from a total of three locations, one location being 20×20Cffl, on the center line of the harvesting surface.

The effect of increasing the yield and improving the quality of tea confections by the agent of the present invention was summarized based on weight, weight, and chlorophyll (a, b) content. That is, the picked tea confectionery was divided into unopened buds of excellent quality and developed buds of inferior quality, and the weight and weight of each were examined and expressed as a ratio of untreated plots.

In addition, the degree of opening was determined using the following formula, and the appropriate harvesting period was investigated.

Furthermore, the chlorophyll content was quantified by the Arnon method ["Latest Crop Physiological Experiment Methods" published October 15, 1985 (Ik Industry Technology Association), pages 337 to 339] using expanded leaves, and untreated Shown by ward ratio.

This test was conducted in three groups per drug concentration, with each animal containing three samples.

The results are shown in Table 1.

In addition, the numerical value within 0 for the untreated area in the table is the weight of Itosa (9), the number of cavities (9), and the chlorophyll (a, b) content per fresh type (g). Indicates weight (da).

By spraying the present invention on the leaves of tea plants during the budding stage or the first leaf development stage, the weight and weight of first-class tea leaves (unopened buds) of high quality are significantly increased compared to the case where it is not sprayed. The number of inferior tea confections (emerging buds) has decreased.

Furthermore, the chlorophyll (a%b) content of the tea confectionery also increased, and the effect of increasing the yield and improving the quality of first-class tea was observed.

In addition, the degree of bud emergence in the plots of the present invention was lower than that in the untreated plots, and not only did the percentage of undeveloped buds increase, but the overall yield of tea confectionery also increased.

On the other hand, when treated with gibberellin, the effect was rather inhibitory, and no effect of increasing yield or improving quality was observed.

Test Example 2 The choline chloride solution prepared in Example 3 and the choline phosphate-containing solution prepared in the same manner as in Example 3 except that choline chloride was replaced with choline phosphate were used on tea plants (variety: Sayama Mido). A chemical solution with a prescribed concentration is applied per 10 ares at the sprouting stage, which corresponds to 23 days before picking the first tea leaves, or at the leaf development stage, which corresponds to 14 days before picking the first tea leaves.
was sprayed over the entire tea plant.

Thereafter, the first tea leaves were picked on May 13th, and the second tea leaves were picked on July 3rd in the same manner as in Test Example 1.

The effect of increasing the yield of tea confections by the agent of the present invention was determined by examining the weight of the first and second tea confections and the high degree of opening in the same manner as in Test Example 1, and was shown by the ratio of untreated plots.

This test was conducted twice, with 5 tests per group.

The results are shown in Table 2.

In addition, the numbers in parentheses for the non-sprayed area in the table indicate the weight (-) of the tea leaves from our 10-are school.

By spraying the agent of the present invention on the leaves during the budding stage or the first leaf development stage, not only the first tea leaves but also the second tea ratio was increased, and the yield of the whole tea leaves was also increased.

〔Effect of the invention〕

By spraying the agent of the present invention on the stems and leaves of tea plants, excellent effects of increasing the yield and improving the quality of tea confections are observed. That is, first of all, the yield of high-quality first tea and the chlorophyll a%b content of first tea are increased. This tendency is observed not only in first-grade tea but also in second-grade tea.

Second, the agent of the present invention not only does not cause phytotoxicity to tea plants, but also does not pollute the environment and has no adverse effects on humans or livestock, so it can be used safely.

Claims (1)

[Claims] A tea plant treatment agent characterized by containing at least one type of choline or its salt as an active ingredient.