JP2014150744A - Method for enhancing fruit bearing of plant of rose family - Google Patents

Abstract

（式中、Ｒは水素、Ｃ_１〜Ｃ_６アルキル基、Ｃ_１〜Ｃ_６ハロアルキル基又はフェニル基を表わし、Ｒ^１は水素、Ｃ_１〜Ｃ_６アルキル基、Ｃ_３〜Ｃ_６シクロアルキル基又はベンジル基を表わす。）及び／又はその塩（例えば、カルシウム塩）を有効成分として含有する剤を施用する。
【選択図】なし[PROBLEMS] To provide an agent that can be easily implemented and that efficiently promotes fruit set of a rose family crop, and a method of applying the agent.
A cyclohexane derivative of formula (I) shown below:

(In the formula, R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group, and R ¹ represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₃ -C ₆ cycloalkyl group. Or a benzyl group) and / or a salt thereof (for example, calcium salt) as an active ingredient.
[Selection figure] None

Description

  The present invention relates to a method for promoting the fruit set of rose family crops, and more specifically, prevents a fruit set after flowering such as sweet cherry and is good even in an unfavorable environment such as high temperature conditions. The present invention relates to a method for realizing the fruiting rate.

  Most of the Rosaceae crops use fruits and other foods for food, but the fruiting rate of the Rosaceae crops for which the fruits are used for foods (especially, the fruiting rate of the fruit of the cherry fruit genus) is never high. The economy is greatly affected.

  For example, sugar beets usually bear 5-20% of the blossomed flowers. The fruiting rate of cherry varies depending on the year, but in recent years, the frequency of defective fruiting has increased, which is a major problem. The occurrence of defective fruiting is related to the high temperature before and after the flowering period, and this is considered to be caused by the accelerated degeneration of the ovule (Non-patent Document 1). In the future, with the progress of global warming, it is expected that more and more years will be around the flowering period of sweet cherry, and the problem of lowering the fruiting rate is likely to become more serious. Establishing a technology that stabilizes the fruiting of fruits is an urgent task in order to make the cultivation of sweet cherry etc. economically feasible.

  Sweet cherry is widely cultivated in the north of Yamanashi Prefecture. The flowering period varies from region to region, but is from early April to mid-May. During this period, the temperature gradually rises, but the fluctuation range is large, and it is inevitable that weather conditions will occur that will reduce the fruiting of sweet cherry.

  The fruiting rate of sweet cherry declines not only when the temperature is high before and after the flowering period, but also when it encounters a low temperature before and after the flowering period, and is also affected by rainfall and strong winds. In order to alleviate low temperatures, rainfall, strong winds, etc., for example, a method of covering with a rain-preventing film before the flowering period or a method of coping with installing a windproof net on the house wife side and sides have been devised. However, with regard to high temperatures, there have been no particular simple and practical techniques that can overcome this, although there have been cases in particular in recent years that have led to serious fruiting defects. In fact, no technology has been established to clearly promote fruiting even in poor environments.

  Thus, despite the fact that poor fruiting of Rosaceae crops such as sweet cherry is a serious problem that causes great losses for producers, no effective countermeasures have been established.

  In addition, the use of a plant growth regulator is considered as a method for increasing the fruit setting rate of sweet cherry, and it is known that the fruit fruit setting rate increases when paclobutrazol is applied to flower buds before flowering of sweet cherry (non-patented). Reference 2). However, when paclobutrazol is applied, the growth of sweet shoots is clearly suppressed, and if it is too effective, it may cause a decline in tree vigor and productivity, and the residual effect may remain strong for several years. Therefore, it is extremely difficult to use it practically (Non-patent Document 3).

Horticultural Society Magazine Vol. 65, no. 4 (1997) P.I. 707-712 Horticultural Society Magazine Vol. 70, no. 2 (2001) P.I. 157-162 Low-cost and labor-saving technology No. 22 (1991) p. 294-308

  In such a situation, the present invention provides an agent and method for easily and efficiently increasing the fruit set rate of a rose family crop such as sugar beet, and provides a producer with means for stably and economically producing the fruit. It was made for the purpose.

  In order to achieve the above object, the present inventors examined from various directions, and as a result, when an agent containing a predetermined cyclohexane derivative as an active ingredient was applied, it was completely unexpected without causing harmful side effects, that is, For the first time, the inventors have found that the fruit fruiting rate can be increased without adversely affecting the fruit quality and the growth of the crop, and the present invention has been completed.

That is, the embodiment of the present invention is as follows.
(1) A method for promoting fruit set of a rose family crop, which comprises applying an agent containing a cyclohexane derivative represented by the formula (I) (the following chemical formula 1) and / or a salt thereof as an active ingredient.
(In the formula (I), R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group (including a substituted phenyl group), R ¹ represents hydrogen, C ₁ -C ₆ alkyl group, C ₃ -C (including substituted benzyl group) ₆ cycloalkyl group or a benzyl group represents, or as the salt represents an alkali metal or alkaline earth metal salt.)
(2) In the formula (I) (the following chemical formula 1), the cyclohexane derivative or a salt thereof is hydrogen or a C _{1 to} C ₆ alkyl group, R ¹ is a C _{1 to} C ₆ alkyl group, or C _{3 to} C _6. The method according to (1), wherein the method represents a cycloalkyl group, and the salt is a calcium salt.
(3) The cyclohexane derivative or a salt thereof is a compound represented by Formula (II) (Chemical Formula 3 below) or a calcium salt compound represented by Formula (III) (Chemical Formula 4 below), The method according to 2).
(4) The method according to any one of (1) to (3), wherein the Rosaceae crop is a fruit tree of the genus Sakura.
(5) The method according to (4), wherein the Rosaceae cherry tree is sugar beet.
(6) It should be applied from the germination period to the full bloom period of the harvest year, preferably from the exposure of the culm of the harvest year until the full bloom period, more preferably from the exposure of the culm of the harvest year to the start of flowering. The method according to any one of (1) to (5), wherein
(7) The method according to any one of (1) to (6), wherein spraying is applied to a bud or a flower.
(8) A fruit set accelerator for a fruit of a Rosaceae crop, comprising a cyclohexane derivative represented by the formula (I) (the following chemical formula 1) and / or a salt thereof as an active ingredient.
(In the formula (I), R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group (including a substituted phenyl group), R ¹ represents hydrogen, C ₁ -C ₆ alkyl group, C ₃ -C (including substituted benzyl group) ₆ cycloalkyl group or a benzyl group represents, or as the salt represents an alkali metal or alkaline earth metal salt.)
(9) In the formula (I) (the following chemical formula 1), the cyclohexane derivative or a salt thereof is hydrogen or a C _{1 to} C ₆ alkyl group, R ¹ is a C _{1 to} C ₆ alkyl group, or C _{3 to} C _6. The agent according to (8), which represents a cycloalkyl group and the salt is a calcium salt.
(10) The cyclohexane derivative or a salt thereof is a compound represented by Formula (II) (Chemical Formula 3 below) or a calcium salt compound represented by Formula (III) (Chemical Formula 4 below), The agent according to 9).
(11) The agent according to any one of (8) to (10), wherein the Rosaceae crop is a fruit tree of the genus Sakura.
(12) The agent according to (11), wherein the Rosaceae cherry tree is sugar beet.
(13) It is applied from the germination period to the full bloom period of the harvest year, preferably from the exposure of the culm of the harvest year to the full bloom period, more preferably from the exposure of the culm of the harvest year to the start of flowering. The agent according to any one of (8) to (12), wherein
(14) The agent according to any one of (8) to (13), wherein the agent is spray-applied to buds or flowers.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to easily and efficiently prevent fruit fruiting failure in fruit production of a rose family crop such as sweet cherry (promoting fruit fruiting easily and efficiently), even if it is defective under high temperature conditions or the like. Realizes a good fruiting rate even in the environment, enabling stable fruit production. Thus, the present invention is a technology that brings great benefits to fruit producers and is also beneficial to consumers.

It is the graph which showed the influence which prohexadione calcium salt processing has on the fruit set rate of sweet cherry (Sato Nishiki). The horizontal axis represents the concentration of prohexadione calcium salt of the chemical used for the treatment (cont. Is the untreated control group), and the vertical axis represents the fruiting rate. It is the graph which showed the influence which prohexadione calcium salt processing exerts on the fruit set rate of sweet cherry (Takasago). The horizontal axis represents the concentration of prohexadione calcium salt of the chemical used for the treatment (cont. Is the untreated control group), and the vertical axis represents the fruiting rate. It is the graph which showed the influence which each 200 ppm treatment of prohexadione calcium salt, trinexapac ethyl, and paclobutrazol exerts on the fruiting rate of sweet cherry (Sato Nishiki). The horizontal axis represents the type of drug used for treatment (cont. Is the untreated control group), and the vertical axis represents the fruiting rate. It is the graph which showed the influence which each 200 ppm treatment of prohexadione calcium salt, trinexapac ethyl, and paclobutrazole has on the shoot elongation of sweet cherry (Sato Nishiki). The horizontal axis represents the type of drug used for treatment (cont. Is the untreated control group), and the vertical axis represents the shoot length after stopping the shoot growth. It is the graph which showed the influence which prohexadione calcium salt processing density | concentration has on the fruiting rate of sweet cherry (Sato Nishiki). The horizontal axis represents the concentration of prohexadione calcium salt of the chemical used for the treatment (cont. Is the untreated control group), and the vertical axis represents the fruiting rate.

  The cyclohexane derivative used in the present invention is represented by the formula (I) and has the structure of the following chemical formula 1.

(Wherein R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group (including a substituted phenyl group), and R ¹ is hydrogen, a C ₁ -C ₆ alkyl group) , C ₃ -C ₆ cycloalkyl group or benzyl group (including substituted benzyl group), or a salt represents an alkali metal salt or an alkaline earth metal salt.

As the cyclohexane derivative (I), one or more of the above compounds may be used in combination. For example, in the formula (I), R is hydrogen or a C ₁ -C ₆ alkyl group, and R ¹ is C ₁ -C. ₆ alkyl group or C ₃ -C ₆ cycloalkyl group, salt is alkali metal (sodium, potassium, etc.), alkaline earth metal (calcium, magnesium, etc.), aluminum, copper, nickel, manganese, cobalt, zinc, iron Or a compound which represents silver, and preferably represents a calcium salt, is a preferred example.

  The cyclohexane derivative (I) can be produced, for example, as follows according to Japanese Patent Publication No. 4-29659 (Chemical Formula 2 below).

That is, compound (IV) or compound (V) (wherein M ¹ represents an alkali metal atom, R represents the same meaning as described above), and acid chloride (R ¹ COCl: R ¹ represents the same meaning as described above). In the presence or absence of γ-picoline, in the presence or absence of a base, in the presence of a solvent, in the temperature range from −20 ° C. to the boiling point of the solvent, preferably at room temperature or lower for 10 minutes. The compound (VI) can be produced by reacting for 7 hours.
Examples of the base include organic bases such as trimethylamine, triethylamine, tripropylamine, tributylamine, pyridine, 4-N, N-dimethylaminopyridine, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and hydrogen carbonate. An inorganic base such as sodium can be mentioned.

Compound (I) can be produced by reacting compound (VI) in the presence of a catalyst and a solvent at a temperature ranging from room temperature to the boiling point of the solvent for 1 to 10 hours.
Here, examples of the catalyst include pyridine derivatives such as 4-N, N-dimethylaminopyridine, 4-N, N-diethylaminopyridine and 4-pyrrolidinoaminopyridine, and N-alkylimidazole derivatives such as N-ethylimidazole. be able to.

  Commercial products can also be used. For example, prohexadione and prohexadione calcium salts represented by the following chemical formulas 3 and 4 (formula (II), formula (III): these are all commercially available. Especially for prohexadione calcium salt, “Bibiful (Kumiai Chemical Industry Co., Ltd. product: registered trademark)”, “Caltime (Kumiai Chemical Industry Co., Ltd. product: registered trademark)”, “Biolock (RIKEN Green Product: registered trademark)” ) "Is commercially available under the trade name.)) Can be used as appropriate. As other examples, trinexapacethyl represented by the following chemical formula 5 (formula (VII)) (also “Primomomax (Syngenta Japan Co., Ltd. product: registered trademark)”), “Susanomax (Syngenta Japan Co., Ltd. product) : Registered trademark) ") is also commercially available.

  In the method of the present invention, the application amount of the cyclohexane derivative represented by the above formula (I) may be appropriately determined according to the kind of the target Rosaceae crop, the mode of use of the drug, the method of use, the time of use, etc. It is used at a concentration of 1-1000 ppm, preferably 10-500 ppm, more preferably 50-200 ppm. In order to dilute to the target concentration, water or an aqueous solution of a surfactant used for diluting ordinary agricultural chemicals is used.

  The cyclohexane derivative used in the method of the present invention contains other auxiliary agents such as a carrier, an emulsifier, a dispersant, a spreading agent, a wetting agent, a fixing agent, a disintegrating agent, etc., which are usually used in agriculture as necessary. It can be formulated into various forms such as wettable powder, emulsion, powder, granule, wettable powder, and paste.

  The following are mentioned as an adjuvant used here. Examples of the liquid carrier include water, alcohols such as ethanol and methanol, ketones such as acetone, and esters such as ethyl acetate. As the emulsifier or dispersant, a surfactant is usually used. For example, anionic surfactants such as higher alcohol sodium sulfate, stearyltrimethylammonium chloride, polyoxyethylene alkylphenyl ether, lauryl betaine, and cationic surfactants. Surfactants and zwitterionic surfactants can be mentioned. In the case of a paste, lanolin, petrolatum or the like is used.

In the method of the present invention, in addition to one or more cyclohexane derivatives represented by the above formula (I), other insecticides, acaricides, nematocides, fungicides, herbicides, microbial preparations Fertilizers, spreading agents, and other agriculturally acceptable ingredients may be mixed or used before and after.
In addition, this invention is the fruit set promotion effect (fruit setting promotion effect) of the fruit of a Rosaceae crop only by making only the 1 type, or 2 or more types of cyclohexane derivative shown by said Formula (I), and / or its salt only into an active ingredient. It is not necessary to use other plant growth promoters (plant growth regulators) in combination, but does not exclude the combined use of other plant growth promoters.

  In the method of the present invention, the application time of the cyclohexane derivative represented by the above formula (I) varies depending on the type of crop, but it is preferably between the germination period and the full bloom period of the fruit harvest year, more preferably It is applied between the time when the flower is exposed and the beginning of flowering. Examples of the application method include a method of spraying the dilute solution (preferably a liquid agent) on the buds or flowers. The present invention, when applied during the period from when the pods are exposed to the full bloom period, has only a predetermined effect when applied only to the buds or flowers, and does not need to be applied to the entire plant body. It does not exclude application to the whole plant. In addition, it is preferable that the application time is the same as the fruit harvest year (the application may be applied only during the fruit harvest year), but it does not exclude the application before the year before the fruit harvest.

Applicable crops of the present invention are not particularly limited as long as they are crops of the Rosaceae family, such as strawberries, apples, pears, loquats, but fruit trees of the genus Sakura (Prunus spp.) It is extremely effective for ume, apricot, yusraume, almond, etc.).
Further, the method of the present invention can be similarly used for crops transformed by a technique such as genetic recombination.

  Examples of the present invention will be described below, but the present invention is not limited to these examples, and various modifications can be made within the technical idea of the present invention.

(Test Example 1)
For sweet cherry, the effect of prohexadione calcium salt on fruit set was tested in the following experimental outline. In addition, the prohexadione calcium salt was performed using the Biolock Flowable (registered trademark, containing 25% prohexadione calcium salt) of Riken Green Co., Ltd.

Outline of Experiment Material: Japanese cherry (variety: Nishiki Sato)
Beginning of flowering on April 8, 2010, fruit harvest on June 4, 2010 Treatment date: April 6, 2010 Treatment method: Spreaded over the surface to the extent that the chemical solution was dripped with a back-loading power sprayer.
Number of survey flowers: 100-150 per treatment area

Treatment area No treatment: Cont (no treatment control group)
Prohexadione calcium salt 200ppm treatment Prohexadione calcium salt 500ppm treatment

  The obtained results are shown in FIG. The fruit set in the untreated control group was 3.8%, whereas the treatment with prohexadione calcium salt 200ppm was 8.1%, and the treatment with prohexadione calcium salt 500ppm was 10.8%. A clear effect of improving the fruiting rate was recognized by dione calcium salt treatment.

  As is clear from the results in FIG. 1, an improvement in the fruit setting of sweet cherry was clearly observed by treatment with prohexadione calcium salt immediately before flowering, compared with the untreated control group. Moreover, the quality of the fruits was the same as that of the untreated control group, and there was no effect on the growth of fruit trees such as the growth of new treetops.

(Test Example 2)
The same evaluation test as in Example 1 was performed in the following experimental outline.

Outline of experiment Material: Japanese cherry (variety: Takasago)
Beginning of flowering on April 4, 2010, fruit harvest on June 4, 2010 Treatment date: April 2, 2010 Treatment method: Sprayed over the surface to the extent that the chemical solution was dripped with a shoulder-type power sprayer.
Number of survey flowers: 100-150 per treatment area

Treatment area No treatment: Cont (no treatment control group)
Prohexadione calcium salt 200ppm treatment

  The obtained results are shown in FIG. The untreated control group had a fruiting rate of 4.3%, whereas the treatment with prohexadione calcium salt 200ppm was 10.3%, which clearly improved the fruiting rate by treatment with prohexadione calcium salt. Admitted.

  As is clear from the results in FIG. 2, an improvement in the fruit setting of sweet cherry was clearly observed by treatment with prohexadione calcium salt immediately before flowering, compared with the untreated control group. Moreover, the quality of the fruits was the same as that of the untreated control group, and there was no effect on the growth of fruit trees such as the growth of new treetops.

(Test Example 3)
In the following experimental outline, the effects of prohexadione calcium salt (Biolock Flowable) and paclobutrazol (Bounty Flowable: Syngenta Japan Co., Ltd., registered trademark) on the fruit setting of sweet cherry were tested.

Outline of experiment Material: Japanese cherry (variety: Takasago)
Beginning of flowering on April 16, 2011, fruit harvest on June 4, 2011 Treatment date: April 13, 2011 Treatment method: The entire surface was sprayed to the extent that the drug solution was dripped with a shoulder-type power sprayer.
Number of survey flowers: 250-350 per treatment area

Treatment area No treatment: Cont (no treatment control group)
Prohexadione calcium salt 200ppm treatment Paclobutrazol 200ppm treatment

  The obtained results are shown in Table 1. As is clear from the results in Table 1, the treatment with prohexadione calcium salt and paclobutrazole clearly showed an improvement in the fruiting rate compared to the untreated control group, but the fruit quality was none. It was equivalent to the treated control. The growth of new shoots was suppressed in the paclobutrazole treated group, but no effect was observed in the prohexadione calcium salt treated group.

(Test Example 4)
Prohexadione calcium salt (Biolock Flowable), Trinexapac Ethyl (Primomox Solution: Syngenta Japan Co., Ltd., registered trademark), and Paclobutrazol (Bounty Flowable) give the fruiting rate of sweet cherry The effect was tested.

Outline of experiment Material: Japanese cherry (variety: Nishiki Sato)
Beginning of flowering on April 22, 2012, fruit harvest on June 18, 2012 Processing date: April 17, 2012 Processing method: The entire surface was sprayed to the extent that the chemical solution was dripped with a shoulder-type power sprayer.
Number of survey flowers: 250-400 per treatment area

Treatment area No treatment: Cont. (Untreated control zone)
Prohexadione calcium salt 200ppm treatment,
Trinexapac ethyl 200ppm treatment Paclobutrazol 200ppm treatment

  The obtained results are shown in FIG. The fruit set in the untreated control group was 19.2%, whereas prohexadione calcium salt treatment was 25.9%, trinexapac ethyl treatment was 26.5%, and paclobutrazole treatment was 29. It was 0.5%, and a clear effect of improving the fruit setting rate was recognized by each treatment.

  As is apparent from the results in FIG. 3, the treatment with prohexadione calcium salt, trinexapac-ethyl, and paclobutrazole clearly showed an improvement in sweet berries compared with the untreated control group. It was. Moreover, the fruit quality was the same as that of the untreated control group.

(Test Example 5)
In the same test outline as in Test Example 4, the effects of prohexadione calcium salt, trinexapac ethyl, and paclobutrazol on sweet shoot elongation were tested.

Outline of Experiment Same as Test Example 4.
Number of survey branches: 15 per treatment area (3 bowls x 5 new shoots)

  The obtained results are shown in FIG. The shoot length of the untreated control group was 107.1 mm, whereas the prohexadione calcium salt treatment was 95.7 mm, the trinexapac ethyl treatment was 36.7 mm, and the paclobutrazole treatment was 15.6 mm. Met.

  As is clear from the results of FIG. 4, the shoot length was significantly shorter in the paclobutrazol-treated group than in the untreated control group. Thus, when paclobutrazol was applied, the growth of new shoots was clearly suppressed, and when it was too effective, it was confirmed that it was difficult to use because it caused a decrease in vigor and a decrease in productivity. On the other hand, the prohexadione calcium salt treatment did not show a large difference in the shoot length compared to the untreated control group.

(Test Example 6)
In the following experimental outline, the effect of the treatment concentration of prohexadione calcium salt (Biolock Flowable) on the fruit setting of sweet cherry was tested.

Outline of experiment Material: Japanese cherry (variety: Nishiki Sato)
Beginning of flowering on April 24, 2012, fruit harvest on June 20, 2012 Processing date: April 18, 2012 Processing method: The entire surface was sprayed to the extent that the chemical solution was dripped with a shoulder-type power sprayer.
Number of surveyed flowers: 150-300 per treatment area

Treatment area No treatment: Cont. (Untreated control zone)
Prohexadione calcium salt 12.5 ppm treatment Prohexadione calcium salt 25 ppm treatment Prohexadione calcium salt 50 ppm treatment Prohexadione calcium salt 100 ppm treatment Prohexadione calcium salt 200 ppm treatment

  The obtained results are shown in FIG. The fruit set in the untreated control group was 16.0%, whereas the prohexadione calcium salt 12.5ppm treatment was 24.8%, the 25ppm treatment was 26.9%, and the 50ppm treatment was 29.6%. The 100 ppm treatment was 25.9% and the 200 ppm treatment was 37.9%, and a clear effect of improving the fruit setting was recognized in any of the treatment sections.

  As is clear from the results of FIG. 5, in the prohexadione calcium salt-treated group, an improvement in the fruit set rate was observed between the treatment concentrations of 12.5 ppm and 200 ppm as compared with the untreated control group. In all the test plots, the fruit quality was the same as that of the untreated control plot, and no difference was observed in the growth of new shoots.

(Test Example 7)
In the following experimental outline, the effect of treatment concentration and treatment time of prohexadione calcium salt (Biolock Flowable) on the fruit set rate of sweet cherry was tested.

Outline of experiment Material: Japanese cherry (variety: Nishiki Sato)
Beginning of flowering on April 24, 2011, fruit harvest on June 4, 2011 Treatment method: The entire surface was sprayed to the extent that the drug solution was dripped with a backpack power sprayer.
Number of survey flowers: 300-400 per treatment area

Treatment area No treatment: Cont (no treatment control group)
Prohexadione calcium salt 50ppm treatment (Treatment date: April 21, 2011)
Prohexadione calcium salt 100ppm treatment (treatment date: April 21, 2011)
Prohexadione calcium salt 200ppm treatment (Treatment date: April 21, 2011)
Prohexadione calcium salt 200ppm treatment (Treatment date: April 7, 2011)

  The obtained results are shown in Table 2. As is clear from the results in Table 2, all the test plots treated with 50 ppm, 100 ppm, and 200 ppm of prohexadione calcium salt on April 21 improved the fruiting rate clearly compared with the untreated control plot. In addition, the fruit set rate was also clearly improved in the test group treated with 200 ppm of prohexadione calcium salt on April 7. In all the test plots, the fruit quality was the same as that of the untreated control plot, and no difference was observed in the growth of new shoots.

  As described above, the present invention uses the cyclohexane derivative represented by the above formula (I) and / or a salt thereof as a single active ingredient, and remarkably promotes fruit set without negatively affecting the rose family crop, Has a characteristic (simpleness, economy, etc.) that is not effective in the prior art that it is effective even when applied just before flowering in the year of harvest of the Rosaceae crop, not before the harvest.

  The present invention is summarized as follows.

  An object of this invention is to provide the agent which can be implemented simply and accelerates | stimulates the fruiting of the fruit of a Rosaceae crop efficiently, and the method of applying the said agent.

  Then, by applying an agent containing a cyclohexane derivative represented by the above formula (I) and / or a salt thereof as an active ingredient, fruit set of a rose family crop is easily and efficiently promoted.

Claims (14)

A method for promoting fruit set of a rose family crop, which comprises applying an agent containing a cyclohexane derivative of formula (I) represented by the following chemical formula 6 and / or a salt thereof as an active ingredient.

(Wherein R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group (including a substituted phenyl group), and R ¹ is hydrogen, a C ₁ -C ₆ alkyl group) , C ₃ -C ₆ cycloalkyl group or benzyl group (including substituted benzyl group), or a salt represents an alkali metal salt or an alkaline earth metal salt. The cyclohexane derivative or a salt thereof, in formula (I), R is hydrogen or _C 1 -C ₆ alkyl group, ^{R 1} _C 1 -C ₆ alkyl or _C 3 -C ₆ cycloalkyl group, salts The method according to claim 1, wherein the method is a calcium salt. The cyclohexane derivative or a salt thereof is a compound of the formula (II) represented by the following chemical formula 7 or a calcium salt compound of the formula (III) represented by the following chemical formula 8: Method.

  The method according to any one of claims 1 to 3, wherein the Rosaceae crop is a fruit tree of the genus Sakura.   The method according to claim 4, wherein the Rosaceae cherry tree is sugar beet.   The method according to any one of claims 1 to 5, wherein the method is applied from the germination period to the full bloom period of the harvest year.   7. The method according to any one of claims 1 to 6, characterized in that the mist or flower is sprayed. A fruit set promoter for fruit of a rose family crop, comprising a cyclohexane derivative of formula (I) represented by the following chemical formula 6 and / or a salt thereof as an active ingredient.

(Wherein R represents hydrogen, a C ₁ -C ₆ alkyl group, a C ₁ -C ₆ haloalkyl group or a phenyl group (including a substituted phenyl group), and R ¹ is hydrogen, a C ₁ -C ₆ alkyl group) , C ₃ -C ₆ cycloalkyl group or benzyl group (including substituted benzyl group), or a salt represents an alkali metal salt or an alkaline earth metal salt. The cyclohexane derivative or a salt thereof, in formula (I), R is hydrogen or _C 1 -C ₆ alkyl group, ^{R 1} _C 1 -C ₆ alkyl or _C 3 -C ₆ cycloalkyl group, salts The agent according to claim 8, wherein the agent is a calcium salt. The cyclohexane derivative or a salt thereof is a compound of the formula (II) represented by the following chemical formula 7 or a calcium salt compound of the formula (III) represented by the chemical formula 8 below: Agent.

  The agent according to any one of claims 8 to 10, wherein the Rosaceae crop is a fruit tree of the genus Sakura.   The agent according to claim 11, wherein the Rosaceae cherry tree is sugar beet.   The agent according to any one of claims 8 to 12, which is applied from the germination stage to the full bloom stage of the harvest year.   The agent according to any one of claims 8 to 13, wherein the agent is applied to buds or flowers by spraying.

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