JPS58167501A - Preventing agent for germination of ear - Google Patents

Abstract

PURPOSE:A preventing agent for the germination of ears, containing propylene glycol as an active constituent, and capable of exhibiting a sufficient preventing effect on the germination of the ears, e.g. rice plants, wheat, barley, etc. without the phytotoxicity to crops, e.g. deterioration of the quality such as shattering of crops and deterioration in quality of harvested crops, without the toxicity to humans and cattle. CONSTITUTION:A preventing agent for the germination of ears containing propylene glycol (=1,2-propanediol) which is well known as a solvent, diluent, stabilizer, drift inhibitor, etc. of an active constituent in an agricultural chemical without the toxicity to humans and cattle and expressed by the formula as an active constituent. Seeds of rice plants, wheat, barley, etc. treated with the above-mentioned propylene glycol germinate normally by sewing after a given period and are usable at ease. The addition of an adjuvant, e.g. a surfactant, natural or synthetic high polymer, further enhances the preventing effect on the germination of the ears. The preventing agent is preferably applied 20 days before the harvesting of the rice plants, wheat, barley, etc. to just before the harvesting. EFFECT:Effective for the preventing effect on the germination of the rice plants, wheat, barley, etc. in storing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ear germination inhibitor for rice and wheat containing propylene glycol (chemical name: 1,2-propanediol, HO-OH2-♂H-CiHg) as an active ingredient.

The phenomenon of single germination is likely to occur when the first half of the ripening period is relatively low, the second half is slightly hot, and moreover, during the harvesting period F, long rains are encountered.

Harvesting irL song's ear germination company, with a significant decrease in yield ^-
1. It brings about a negative decline and causes a serious loss to the income of the noble family. To this end, attempts have been made to develop varieties that are resistant to panicle germination. For example, alpha-naphthalene acetic acid (IIAA) and maleic hydrazide (
Various practical tests have been conducted using plant hormone agents such as 1,2-dihydro-5,6-pyridazinedione (trade name: Mu-30).・However, the chemical agents tested in this trench have little ability to prevent panicle germination, or even if they have the ability to prevent panicle germination, sterility occurs after treatment and the harvested grains fail. This method has drawbacks such as significantly reducing the quality of rice grains or wheat flour. Furthermore, to prevent ear germination, chemicals must be sprayed just before harvesting.Secondly, special safety considerations (acute and chronic toxicity, etc.) are required for rice and wheat MKFi, which are mainly edible. Ru.

The drugs to date have not been satisfactory in terms of efficacy and safety, and have never been developed as panicle germination inhibitors. Therefore, at present, there are no drugs that have been put to practical use as panicle germination inhibitors.

The present inventors tested a large number of compounds in order to develop a safe anti-germination agent that has an accurate anti-germination effect, has no toxicity to humans or livestock, and is free from chemical damage to crops. It was discovered that even when propylene glycol is used at a high concentration, it does not cause any chemical damage to crops such as grain shedding or deterioration of the quality of the harvest, and exhibits its full effect as an ear germination inhibitor. It has no toxicity to propylene glycol. therefore,
The propylene glycol of the present invention can be put to practical use as an ear germination inhibitor for rice and wheat with extremely peace of mind.

The propylene glycol of the present invention not only has such an effect of preventing ear germination, but also has an effect of preventing germination during storage of rice and wheat.

Generally, sprouting occurs in nails and wheat if they are left at a temperature and humidity that facilitates germination during storage. Such a germination phenomenon results in great losses both when used as food and as seeds.

The propylene glycol of the present invention is useful as a germination inhibitor in such cases, and the seeds of rice and wheat that have been treated with the chemical according to the present invention will germinate normally if sown after a certain period of time. It has features that allow it to be used with confidence.

The propylene glycol of the present invention has been used as a solvent, an antifreeze, a lubricating oil for low temperatures, a fumicide, etc. [``Chemistry Encyclopedia'' Vol. 8, No. 125 (Kyoritsu Shuppan Co., Ltd.) ) Published in 1970].Especially in the field of agricultural chemical formulations, for example, Japanese Patent Publications No. 35-6399 and No. 57-17.
No. 594, No. 55-17653, No. 57-5
It is known as a solvent, diluent, stabilizer, anti-drift agent, etc. for active ingredients of agricultural chemicals, as described in Japanese Patent Publication No. 201 and Japanese Patent Application Laid-Open No. 48-75730. However, nothing has been disclosed regarding the use of propylene glycol as an active ingredient in an panicle germination inhibitor, which is one embodiment of a plant regulator.

The types of rice and wheat to which the present invention can be applied, as well as the eight crops, are not limited to specific VCv11. Examples of such rice varieties include Japanese types (Sasanishiki, Koshihikari, etc.), Indian types (IR-8), etc.

'r126, etc.) and mixed types of these, and the secondary wheat types include wheat (Ikbayashi No. 61, Pikari wheat,
There are grass wheat (Japanese wheat, Japanese wheat, etc.), Japanese wheat (Japanese wheat, Japanese wheat, Japanese wheat, etc.), grouper: Japanese wheat, oat, rye, etc.

The panicle germination inhibitor of the present invention can be formulated into various dosage forms, such as liquids, powders, irrigation agents, and aqueous solutions. When used as a liquid, propylene glycol can be used as it is or diluted with water. In addition, when formulating formulations, considering wet-spreadability, permeability, adhesion, and fixation, additives such as various surfactants, natural polymers, and synthetic polymers can be added to improve panicle germination. The prevention effect can be further enhanced. As an adjuvant, Al*R 1a-cx chill salt,
Anionic surfactants such as alkylbenzene sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkyl sulfates, naphthalene sulfonic acid formalin condensates, lignin sulfonates, polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl Nonionic surfactants such as ether, polyoxyethylene fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, gum arabic, casein, carboxymethyl cellulose, starch, gelatin, polyethylene oxide,
Examples include water-soluble polymers such as polyvinyl alcohol, sodium polyacrylate, methylcellulose, and ethylcellulose.

The propylene glycol of the present invention can be prepared by conventional methods without using special methods or equipment.

Examples are shown below, but the present invention is not limited only to the examples.
It never happens. Furthermore, all parts in the examples refer to parts by weight. Example 1 The liquid propylene glycol stock solution is used as is.

Example 2 Liquid Form A liquid form was obtained by adding 2111 parts of polyoxyethylene nonylphenyl ether to 98 parts of propylene glycol and thoroughly stirring the mixture with t, t xer.

Example 3 Liquid formulation 2 parts of nrubitan lauric acid monoester are added to 98 parts of propylene glycol and thoroughly stirred with a mixer to obtain a liquid formulation.

Example 4 Powder 10 parts of propylene glycol, 10 parts of white carbon, 0.3 parts of isopropyl acid phosphate (physical property improver) and 797 parts of clay were added, and the powder was mixed with a hammer once to obtain a powder.

Example 5 Wettable powder 40 parts of propylene glycol, 40 parts of white carbon, 5 parts of calcium lignin sulfonate, 2 parts of polyvinyl alcohol and 13 parts of clay are added and mixed by crushing with a hammer bar to obtain a wettable powder.

Example 6 Water Solvent 40 parts of propylene glycol, 2 parts of polyoxyethylene nonylphenyl ether and 58 parts of curable starch were added and mixed by pulverization in a 1-hammer mill to obtain a water solvent.

The panicle germination inhibitor of the present invention formulated as described above may be administered in the same manner as general agricultural chemical formulations.

In the case of powder, it can be dusted with a regular duster, and the amount of preparation per 10 acres is around 10 k), which can be sprinkled once or several times.
Bye. In the case of liquid preparations, irrigation agents, water solvents, etc., they may be sprayed as is, but they can also be diluted with water to any concentration for convenience.

In this case, when a sufficient effect is expected for the purpose of preventing germination of rice and wheat, the concentration of the active ingredient in the spray solution is 1% or more, preferably 25% or more. When spraying at a low concentration with an active ingredient concentration of 25% or less, usually a single application of 100 to 300 per 10 are is sufficient to prevent germination, but depending on weather conditions, A more accurate effect can be expected if the frequency of spraying is increased depending on the conditions and growth state of the crop. In addition, when spraying at a high concentration of 25% or more, usually 10 to 10A per 10A.
The desired effect can be obtained by spraying tfC once in an amount less than that amount, or by increasing the number of sprayings depending on weather conditions, crop growth conditions, etc. The basic timing of use in order to achieve an accurate ear germination prevention effect is from 20 days before harvest of rice and wheat until just before t [7%], but in seasons where it is easy to rain, It is preferable to spray the chemical 2 to 7 days before the anticipated date of K to prevent germination of grains during storage.
The grains of rice and wheat are treated with chemicals (treatments such as powder dressing, spraying, and soaking) before storage, or they are washed once or several times at an appropriate time after storage. It is best to treat with chemicals.

Additionally, the panicle germination inhibitor of the present invention may be used in combination with other panicle germination inhibitors and others.
It can be mixed with other plant growth hormones, etc. at the time of use, or used as a mixed preparation in advance.

Next, a test example will be shown regarding the effect of the panicle germination inhibitor of the present invention.

Test Example 1 One plot of 2 m2 was planted in a field where wheat (product f! I: Norin No. 61) was grown, and the solution of Example 1 was used as it was or diluted to a predetermined concentration to determine the wheat yield. 17 days ago (
43 days after earing), 14 days ago (36 days after the same) and 21 days before (29 days after the same) 10 ares! 0.0100 tons, evenly spread to cover the entire wheat ear and peel. After 50 days of earing, the entire wheat ear was harvested with sufficient care to avoid shedding, and subjected to an ear germination test in a Petri dish using the following conventional method.

That is, PM was placed in a petri dish with a diameter of 15 mm, 10 ears of wheat were placed on top of it, and then covered with damp gauze to maintain sufficient humidity at KL, 20°C.
It was left in a dark room for 14 days. After that, the petri dish was taken out and the germination rate N was investigated.This test was conducted in 5 dishes per concentration, 7 days before harvest, 14 days before harvest, and 21 days before harvest, and the average germination rate (T) was calculated. In order to check for the presence or absence of E. trachea drug damage, yield and quality tests were conducted immediately after harvesting, and the results are shown in Table 1.

Test Example 2 (Residual effect test) Wheat during standing hair (product M: 30 days after harvesting (20 days before harvest))
The liquid preparation of Example 2 was sprayed as it was or diluted to a predetermined concentration onto Hikari wheat at a rate of 10 arem and 100 tons so as to sufficiently cover the entire ear. Immediately after the chemical spraying, 5 days later, 10 days later, and 15 days later from within one district.
After 50 days, the 50th ear of each ear was harvested, and the germination rate was examined using the same method as in Test Example 1.

This test was carried out in 5 Petri dishes per concentration (1 shear per dish).
0 seeds) and calculated the average germination rate (%).

i! 20 days after the next chemical spraying (50 days after earing), 50 ears were harvested from the same plot and treated in the same manner as in Test Example 1, yield and quality were investigated to determine the presence or absence of chemical damage.

The results are shown in Table 2.

Test Example 3 (Rain Resistance Test) The solution of Example 3 was applied as is or diluted to a specified concentration to wheat in the erecting stage (variety Kokeshi wheat) 40 days after earing (10 days before harvest) and applied to the whole ear at a rate of 100 tons per 10 ares. Spray it evenly so that it covers the area sufficiently. One day after the chemical solution treatment, the ears were harvested, stuck on styrofoam, and subjected to a rain resistance test.

Rainfall is 5.7 to 9 in 5 to 80 minutes using artificial rain equipment.
It rained &8■. After the rainfall treatment, the 1m small was immediately subjected to the panicle germination test in the same manner as Test Example 1, and after 3 days, 6
The germination rate was examined after 1 day and 10 days.

This germination test was conducted in 3 Petri dishes (10 large ears per shear) per concentration and 1 rainfall, and the average germination rate N was determined.
The results are shown in Table 3.

Table 3 Test Example 4 One plot of 2 m2 was taken out in a field where paddy rice (product aI: Asahi) was growing uniformly, and the solution of Example 3 was applied to it! Or dilute it to a specified concentration and use it at a rate of 50 to 300 tons per 10 ares 7 days before harvesting rice to ensure that the entire ear of rice is fully grown.
Spread it evenly. Seven days later (61 days after ear emergence), the entire ear of paddy rice was harvested with sufficient care to avoid shedding, and subjected to a germination test in the same manner as Test Example 1 (however, the culture temperature was 28 ° C.). After 14 days of testing, the germination rate (-) was examined.

This test was conducted using a 3-peel system (1 concentration per sprayed dose) (10 ears per petri dish), and the average germination rate N was determined. Immediately after harvesting the spikelets, the yield and quality are examined to check for chemical damage. The results are shown in Table 4.

Table 4

Claims (1)

[Claims] An ear germination prevention shaver for rice and wheat, characterized by containing propylene glycol as an active ingredient.