JPH03109303A - crop yield enhancer - Google Patents

Abstract

PURPOSE:To provide an agent exhibiting an remarkable yield-increasing activity for grain crops such as rice and beans by containing N<6>-[2-(N-methoxy-N- methylamino)ethyl] adenine or a salt thereof as an active ingredient. CONSTITUTION:The subject agent contains a compound of the formula or its salt with hydrochloric acid, phosphoric acid, acetic acid, etc., as an active ingredient. The compound of the formula is employed in a form of emulsion, water- dispersible powder, powder, solution, etc., together with a liquid diluent such as an alcohol, water or DMF, a solid carrier such as talc, diatomaceous earth or phenolic resin, a surfactant (e.g. alkylbenzene sulfonic acid sodium salt), a dispersing agent, an adhesive agent, etc. The compound of the formula is applied in a rate of 0.01-1g per 10a of the field to a legaminous crop (e.g. soybean, azuki, bean, kidney bean, or peanut) between its flowering time and the grain filling early time of its grain and to the leaf and stem of a gramineous crop (e.g. rice, wheat or corn) between its booting time and its grain filling early time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a crop yield increasing agent, and more particularly to a crop yield increasing agent containing a novel adenine derivative as an active ingredient.

[Prior art, problems to be solved by the invention] Conventionally,
Many studies have been conducted to increase the yield of grain crops such as rice and beans. However, few of them are in practical use.

Therefore, it is desired to develop a drug that is safe and effective and has a yield-increasing effect.

Furthermore, it has been known that cytokinins such as kinetin, zeatin, 6-benzylaminopurine, and thidiazuron have activities such as promoting cell division, cell hypertrophy, promoting differentiation of undifferentiated tissues, preventing aging, and promoting seed germination, respectively. ing.

In recent years, attempts have been made to increase the yield of cereal crops such as paddy rice using cytokinin as described above.

For example, “Journal of the Crop Science Society of Japan, Vol. 51, Separate No. 1 (19
1982), pp. 147-148, conducted a test in which various plant hormones were directly injected into rice ears, and it was reported that zeatin and abscisic acid each had the effect of increasing the ripening rate and 1,000-grain weight.

In addition, 6-(N
It has been described that the yield of grass crops can be increased by treating their ears with (benzylamino)purine, thidiazuron, kinetin and zeatin.

The above-mentioned compounds, for example, have the problem that kinetin and zeatin are natural products and are extremely difficult to produce, and 6-(N-benzylamino)purine and thidiazuron are difficult to produce. Although it is relatively easy to use, it has the drawbacks of low solubility in water and poor absorption and transferability to crops, so it is not necessarily sufficient for practical use.

The present inventors previously discovered a novel adenine derivative, N6-
It has been found that [2-(N-methoxy-N-methylamino)ethyl]adenine and the like have strong cytokinin activity (Japanese Patent Application No. 1-73763).

The present inventor further investigated the action and effect of N6-[2-(N-methoxy-N-methylamino)ethylcoadenine on plants, and found that this compound not only has cytokinin activity but also It was also found that the yield of crops can be increased by applying it to the grass leaves of grass crops such as grasses.

Based on this new knowledge, we have arrived at the present invention.

[Means for solving the problem, made by IIJ] The present invention includes:
This is a crop yield increasing agent characterized by containing N6-[2-(N-methoxy-N-methylamino)ethylcoadenine or a salt thereof as an active ingredient. N6-[2-(N-
The structural formula of methoxy-N-methylamino)ethylcoadenine (hereinafter also referred to as MOMEA) is as shown below.

) fOMEA easily forms salts with acids such as chlorine, sulfuric acid, nitric acid, phosphoric acid, formic acid, and #acid (hereinafter, OMEA and its salts may be collectively referred to as MOMEA).

Like MOMEA, this salt also exhibits cytokinin activity on plants and yield-increasing effects on leguminous and gramineous crops.

MOMEAs can be used alone as crop yield enhancers, but they are usually used as liquid or solid diluents (carriers) commonly used in the agricultural chemical formulation field, and if necessary, as emulsifiers, dispersants, and spreading agents. It is used in the form of a formulation in combination with a surfactant and a fixing agent.

Specific forms include emulsions, wettable powders, powders, and liquids.

Examples of diluents used in preparing liquid formulations include alcohols such as methanol and ethanol, water, and polar solvents such as dimethylformamide and dimethylsulfoxide.

Examples of solid diluents (carriers) for preparing wettable powders, granules, powders, etc. include talc, clay bentonite, kaolin, montmorillonite, diatomaceous earth, phenolic resin, and white carbon.

Examples of surfactants include anionic surfactants such as sodium alkylbenzenesulfonate and sodium lauryl sulfate, cationic surfactants such as stearyltrimethylammonium chloride, and nonionic surfactants such as polyoxyethylene alkylphenyl ether. Examples include drugs.

Dispersants include sodium ligninsulfonate, methylcellulose and sulfite pulp waste liquor.

Examples of the fixing agent include casein lime, glue, carboxymethyl cellulose, sodium alginate, and polyvinyl alcohol.

Although the application site, application amount, and application timing of the present invention vary depending on the type of crop and cannot be generally specified, leguminous crops and gramineous crops are exemplified.

In other words, for grain crops such as leguminous crops and gramineous crops, the chemical is applied to the foliage, but the application amount is M
The amount is usually 0.003 to 3 g per 10 a in terms of OMEA, but preferably 0.01 to Ig.

Regarding the timing of application, for leguminous crops, it is usually applied between the bud set stage and the grain ripening stage, but it can be applied from the beginning of flowering to the early stage of grain ripening. preferable.

Furthermore, for grass crops, the period from the panicle formation stage to the ripening stage is usually set, but the period from the panicle stage to the early stage of ripening is preferred.

Typical examples of crops to which the present invention is applied include leguminous crops such as soybeans, adzuki beans, kidney beans, shikaku beans, and peanuts, and grass crops such as rice, wheat, barley, rye, pigeon wheat, and oats. and corn.

[Examples] Example I HOMEA 0.1 g and Trupol-8222 (nonionic surfactant manufactured by Toho Chemical Industry Co., Ltd.) 10.
A MOMEA solution was prepared by dissolving 0g in 89.9g of water.

Example 2 An emulsion was prepared by dissolving 2 g of MOMEA and 38 g of Nearol CT-1 (tts ionic surfactant manufactured by Toho Chemical Industries, Ltd.) in 60 g of dimethylsulfoxide.

Example 3 HOMEAlog, 15 g of white carbon, 3 g of calcium lignin sulfonate, 1 g of polyoxyethylene nonylphenyl ether, 5 g of diatomaceous earth, and 88 g of clay
A wettable powder was prepared by pulverizing and uniformly mixing g.

Test Example 1 Seedlings of paddy rice (variety Koshihikari) were planted in a paddy field on April 20th, and the MOM prepared in Example 1 was planted on August 4th, which is the heading stage, and August 19th, which is the early stage of ripening.
The EA solution was diluted with water to a predetermined concentration shown in Table 1, and 1009 mg/10a was sprayed on the foliage.

In addition, as a comparison agent, 2 g of 6-(N-benzylamino)purine and 38 g of Nyalol CT-1 (anionic surfactant manufactured by Toho Chemical Industry Co., Ltd.) were dissolved in 60 g of dimethyl sulfoxide to form an emulsion (hereinafter referred to as BA emulsion). ) was prepared and applied at the same timing, concentration, and volume as the MOMEA solution.

In addition, the test was conducted with 3 repetitions of 6II12 in 1st section.

Several tests were conducted on September 19, 41 days after heading, and the weight of brown rice and the weight of 1,000 grains of brown rice were measured.

The results are shown in Table 1.

The weight of brown rice in the untreated area in Table 1 was 536 kg/10a, and the weight of 1,000 grains of brown rice was 21.0 g.

Test Example 2 Seeds of autumn sown wheat (variety Norin No. 61) were sown in a field on October 20th, and the seeds prepared in Example 1 were sown on April 20th, which is the peak elongation period, and May 10th, which is the early stage of ripening. The MOMEA solution and the BA emulsion prepared in Test Example 1 as a comparative agent were each diluted with water to the predetermined concentrations shown in Table 2, and 100Q per 10a was sprayed on stem vegetables.

235 days after sowing, the seeds were harvested and the grain type was measured.

The results are shown in Table 2.

Table 2 Test Example 3 On May 15th, soybean (variety Enrei) seeds were sown in the field.
On July 3rd, the beginning of flowering, and August 7th, the beginning of ripening, the MOMEA solution prepared in Experiment IH and the BA emulsion obtained in Test Example 1 as a comparison agent were added to the third experiment.
Dilute each with water to the specified concentration shown in the table,
1009 per loa was sprayed on the foliage.

In addition, 1 area was 12 m2, and the test was conducted in 4 repetitions.

Grain weight was measured 132 days after sowing.

The results are shown in Table 3.

Margin below The grain size per lOa in the untreated plot was 470 kg.

Table 3 The grain size in the untreated plot was 372 kg per 10 a.

[Effects of the Invention] The agent of the present invention exhibits a remarkable yield-increasing effect on crops, especially grain crops.

Claims (1)

[Claims] A crop yield increasing agent characterized by containing N^6-[2-(N-methoxy-N-methylamino)ethyl]adenine or a salt thereof as an active ingredient.