JP3093702B2 - Flower remover and flowering method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flower removing agent for deciduous trees and a method for flowering.

[0002]

2. Description of the Related Art Flowering is performed to promote proper fruit setting of deciduous fruit trees. By restricting the number of fruits by performing flower removal, nutrient depletion is prevented and fruit growth and branch and leaf development are promoted. First, as a method of performing flower removal, a method of picking a flower with a fingertip can be cited. With this method of picking up a flower with a fingertip, early flowering is difficult or it is difficult to actively save labor. Then, as a method of solving the problem, there is a method of spraying a flowering agent. As a drug conventionally used in flower removal, there is a lime-sulfur mixture. This lime-sulfur mixture inhibits fertilization of flower buds and exerts a flower-picking effect by the sterilizing power of sulfur as a component thereof.
Then, this lime-sulfur mixture was converted into an aqueous solution diluted 100 times, and sprayed with a power sprayer or the like at the time of flowering of the fruit tree, thereby performing flower removal.

[0003]

When spraying a lime-sulfur mixture, it is necessary to form fine particles and scatter them over a wide area.
At that time, the lime-sulfur mixture that has become fine particles may be sucked in or attached. Lime sulfur mixture is pH
Due to its strong basicity of 10.6, it has an adverse effect on the human body. Therefore, it was necessary to take protective measures such as putting on a mask. Therefore, handling of the lime sulfur mixture was troublesome.

[0004] The above problem can be solved by reducing the amount of lime (quick lime) as a component of the lime-sulfur mixture to make the pH of the lime-sulfur mixture near neutral. The following problems occur. Lime is originally used to counteract the harmful effects of sulfur, that is, the condition in which the leaves burn brown, so if lime is reduced, the harmful effects of sulfur will occur. Therefore, it is not preferable to adjust the pH of the lime-sulfur mixture.

[0005] Further, since the lime-sulfur mixture is not water-soluble, it is suspended when mixed with water and easily forms a film on the sprayed surface of the sprayed tree. Subsequent application of the pesticide often reduces the effectiveness of the pesticide through its coating. Therefore, even if a pesticide is sprayed after spraying the lime-sulfur mixture, it may hinder the protection of fruit and the like from bacteria and pests.

[0006] In view of the above, the present invention provides:
An object of the present invention is to provide a flower removing agent and a flower removing method which are harmless to the human body and have a high flower removing effect without forming a film on a spraying surface.

[0007]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention Calcium salts are often used as fertilizers that help grow trees, and are useful for trees. Then, when this calcium salt is tried as a flower remover as described later, a favorable result is obtained.
Not only use calcium salt as fertilizer like
It was found that it can be used as a flower remover.

In particular, when the calcium salt is water-soluble
Is conventionally different from the lime sulfur which has been used as a flower thinning agent, without suspending be mixed with water, it is not possible to form a film on spread side. Therefore, even if a pesticide is sprayed later, the effect of the pesticide is not reduced, and a flower remover containing a calcium salt as an active ingredient is more suitable than a lime sulfur mixture.

The calcium salt is a 1% aqueous solution (10%).
(0-fold aqueous solution), the pH should be near neutral
In many cases, when the pH is 6 to 8, unlike the lime-sulfur mixture conventionally used as a flower remover, the flower remover absorbs or adheres to the body without adversely affecting the human body. There is no need to prevent. Therefore, it is not necessary to take protective measures such as putting on a mask as in the related art, and a flower remover containing a calcium salt as an active ingredient is easier to handle than a lime sulfur mixture.

[0010] Among these water-soluble calcium salts, the
The water-soluble inorganic acid calcium according to claim 1 is high in flower removal
Some of them show an effect and are suitable as a flower remover. Inside
The calcium chloride according to claim 2 and the nitric acid according to claim 3
Calcium is preferred.

[0011] In addition, high flower removal in the organic acid calcium
5. The calcium formic acid according to claim 4, which has an effect.
A calcium acetate according to claim 5;
8. Calcium lopionate and ethylenedia according to claim 7.
Calcium mintetraacetate is preferred.

According to each of these claims 4 to 7,
All organic acid calcium are effective as flowering agents.
Can be Moreover, since it is water-soluble, it does not suspend when mixed with water and does not form a film on the sprayed surface of trees and the like. Even if the pesticide is sprayed for protection from insect pests, the effect of the pesticide is not reduced on the film surface, and the effect of the pesticide is not hindered. Further, the pH of the 1% aqueous solution is 6 to 8
Because it is between, there is no harm to the human body. Therefore, the claim
The flower removers 4 to 7 exhibit a flower removing effect while solving the problems of the conventional lime-sulfur mixture, and are suitable as flower removers.

[0013] The flower remover containing calcium formate as an active ingredient according to claim 4 has a flower removal effect equal to or higher than that of a lime-sulfur mixture which has been conventionally used as a flower remover. It is almost neutral with 02, and is very preferable as a flower remover. Conventionally, since it is mainly used as a calcium fertilizer, the effect of promoting the growth of fruit trees is also high.

In the case of a flower remover containing calcium formate as an active ingredient, a flowering effect can be obtained by using it in the range of pH 4 to pH 10, but it has an effect on the human body and is practically in the range of pH 4 to pH 8. It is preferable to use them. This is because trees are acidic at pH 4.5, and basicity of about pH 8 has no adverse effect on the human body. More preferably, more preferably,
It is preferable to use in the range of pH 6 to pH 7.02. This is because, in consideration of the effect on the human body, near neutrality is preferable, and the effect of suppressing fruit set of side flowers in the range of pH 6 to pH 7.02 is higher than that of other examples from the examples described later.

[0015] In the case of a flower remover containing calcium formate as an active ingredient, as described later, a test is performed on deciduous fruit trees such as apples and pears, and a suitable flowering effect is confirmed.
It was recognized.

A calcium sulfate salt according to claim 8
Calcium citrate combination is also used for conventional lime sulfur
While eliminating the problem of the mixture, it has a flowering effect,
It is suitable. As described above, the pH of the aqueous solution is 6 to
Claim 8 is because there is no harm to the human body when spraying.
As described, when the concentration of the active ingredient is 1% aqueous solution
The pH is desirably 6 to 8.

Next, a method of spraying the flower picking agent of the present invention on deciduous fruit trees will be described. In the flowering of deciduous fruit trees, the central flower of the top bud first becomes full bloom. Subsequently, the side flower of the top bud is in full bloom with a delay. Further, after about one week, the central flower and lateral flowers of the axillary buds are in full bloom. However, flowering of the axillary buds is not as good as the top buds are already fruiting and the nutrients of the tree are relatively concentrated on the top buds. In addition, many fruits do not bear fruit, and physiological fruit drop is likely to occur.

The mechanism of flowering of deciduous fruit trees as described above
According to the present invention, the spraying time of the flower-cutting agent of the present invention is based on
It is suitable when the heart flower is in full bloom.

When this flower remover is sprayed when the central flower of the top bud of the deciduous fruit tree is in full bloom, the flower remover adheres to the pollen of the stamen of the flower bud. Then, even if the pollen to which the flower disinfectant adheres subsequently pollinates the pistil, fertilization is inhibited by the germination suppression effect of the flower disinfectant, and fruit set is reduced, as shown in the examples described later. However, at this time, since only the central flower of the apical bud is in full bloom, many of them have already finished insemination, resulting in many fruits. As for the side flower of the top bud, some flower buds are in an open state, while some flower buds are in a half-open state. The flower bud in the half-open state has the flowering agent attached to the pollen of the stamen, so that even if the pollen is pollinated to the pistil after opening, germination is suppressed and fertilization cannot be achieved. Therefore, the side flower of the apical bud often cannot bear fruit, and the flowering effect becomes high. In addition, flowering and fruiting of axillary buds are not as good as above, but by using a flowering agent, it prevents fertilization and prevents fruiting.
Further, there is an effect that the concentration of nutrients can be promoted to the central fruit of the top bud.

By spraying in this way, the inside of the top bud
The fruits are fruitful and the other fruits are not very fruitful. This
Results in tree nutrients concentrating on top bud central fruit
In addition, there is an effect that a good fruit can be harvested.

[0021]

EXAMPLES Next, examples of the flower extract of the present invention will be described. In 1996, at the Iwate Prefectural Horticultural Experiment Station, a test was conducted on the test tree Apple Fuji / M9 to confirm the effect of flower removal by calcium formate belonging to the calcium salt. First
In Test 1 of the examples, the flower-cutting effect of the flower-cutting agent is observed from the fruiting rate of calcium formate, lime-sulfur mixture and untreated.
Test 2 of the second example is to check the flowering effect due to the difference in pH of calcium formate. Test 3 of the third embodiment
Shows the relationship between the rate of pollen germination and the rate of fruit set depending on the type of flowering agent applied.

1) Test 1 (First Example) (1) Reagents The following reagents were used as reagents. In addition, the test section which was not sprayed with the flower-cutting agent, which was the standard for comparing the flower-cutting effect of the flower-cutting agent, was not treated (Comparative Example 1) so as to be easily understood.

Calcium formate, pH 7.02 100-fold aqueous solution (Example 1) Lime-sulfur mixture, pH10.6, 100-fold aqueous solution (Comparative Example 2) (2) Day of flowering and spraying In the test tree of this test, flowering started at 5 days. It was the 15th of May, and the bloom was in full bloom on May 20th. Spraying of each reagent agent as a flower remover is on May 21.

(3) Area of test plot and amount of spraying The area of the test plot for testing each flower extract is 10 ares.
The volume of each reagent is 350 liters. (4) Investigation date The inspection date of the test tree on which each reagent was sprayed is June 6 and June 26.

(5) Results The tests as described above were performed, and the results are shown in Table 1. Table 1
Shows the flower-cutting effect of the flower-pruning agent based on calcium formate, lime-sulfur mixture, and untreated fruiting rate. The flowering rate in Table 1 is the percentage of flower buds that blossomed from buds. The fruit set rate is the ratio of flower buds that have set among the flower buds that have opened.

[0026]

[Table 1]

(6) Evaluation The best evaluation for evaluating a flowering agent is that many central fruits of the top bud, which are most likely to be full, remain, and other fruits are not sufficiently full. Evaluate based on this.

Reference is made to the fruiting rate on June 26. First,
Although it is an untreated test tree, the fruiting rate of the central fruit of the top bud is 8
It is 9.7%. Even if it is good that many central fruits of the top bud are fruiting, the side fruits of the top bud are 26.9% and the central fruits of the axillary bud are 32.5%. A lot remains about. Therefore, without processing,
Since nutrients are easily distributed in addition to the central fruit of the top bud, there is much waste.

Next, a test tree sprayed with a conventional lime-sulfur mixture, the fruiting rate of the central fruit of the top bud was 76.9%. Range. And the side fruit of the top bud is 11.2%, and the central fruit of the axillary bud is 25.0%, which is less than that of no treatment.
Therefore, the lime-sulfur mixture is effective because nutrients concentrate on the central fruit of the top bud.

Next, in the test tree to which the calcium formate of the present invention was sprayed, the fruiting rate of the central fruit of the top bud was 75.0.
%, Which is inferior to untreated but comparable to lime-sulfur mixture. And the side bud of the top bud is 4.
0%, the central fruit of the axillary buds is 20.0%, which is less than that of the lime-sulfur mixture. Therefore, calcium formate concentrates on the central fruit of the top bud more than lime sulfur mixture,
More effective.

2) Test 2 (Second Example) (1) Reagents The following reagents were used as reagents. For calcium formate, an aqueous solution diluted 100 times was used. Also, to adjust the pH of calcium formate to 4-10,
When producing calcium formate, it was adjusted by changing the ratio of sodium formate and calcium chloride.

100% aqueous solution of calcium formate pH4 (Example 2) 100% aqueous solution of calcium formate pH5 (Example 3) 100% aqueous solution of calcium formate pH6 (Example 4) 100% aqueous solution of calcium formate pH 7.02 (Example 1) Formic acid Calcium pH8 100 times aqueous solution (Example 5) Calcium formate pH9 100 times aqueous solution (Example 6) Calcium formate pH10 100 times aqueous solution (Example 7) (2) Flowering date and spraying date It was May 15th, and flowering was in full bloom on May 20th. Spraying of each reagent agent as a flower remover is on May 21.

(3) Area of test plot and amount of application The area of test plot where each flowering agent is tested is 10 ares.
The volume of each reagent is 350 liters. (4) Investigation date The inspection date of the test tree on which each reagent was sprayed is June 6 and June 26.

(5) Results The tests as described above were performed, and the results are shown in Table 2. Table 2
Shows flowering effect due to the difference in pH of calcium formate. The flowering rate in Table 2 is the percentage of flower buds that blossomed from buds. The fruit set rate is the ratio of flower buds that have set among the flower buds that have opened.

[0035]

[Table 2]

(6) Evaluation In a 100-fold aqueous solution of calcium formate, each of the aqueous solutions whose pH was changed was sprayed on a test tree. Among them, calcium formate 10 of pH 7.02 which is slightly basic
The ratio of the fruiting rate between the central fruit and the lateral fruit of the top bud of the 0x aqueous solution is
It was particularly suitable. Although a test was performed in which calcium formate was sprayed as a 100-fold aqueous solution, even when calcium formate was sprayed as an aqueous solution diluted to about 1000-fold,
The effect can be expected sufficiently.

3) Test 3 (Third Example) (1) Reagents The following reagents were used as reagents. In addition, the test section which was not sprayed with the flower-cutting agent, which was the standard for comparing the flower-cutting effect of the flower-cutting agent, was not treated (Comparative Example 1) so as to be easily understood.

Calcium formate, pH 7.02 100-fold aqueous solution (Example 1) Lime-sulfur mixture, pH10.6, 100-fold aqueous solution (Comparative Example 2) (2) Day of flowering and spraying In the test tree of this test, flowering started at 5 days. It was the 15th of May, and the bloom was in full bloom on May 20th. Spraying of each reagent agent as a flower remover is on May 21.

(3) Area of test plot and amount of sprayed plot The test plot area for testing each flower extract is 10 ares.
The volume of each reagent is 350 liters. (4) Investigation method First, pollen is extracted from the flower buds of the test tree selected for each test plot in which each reagent was sprayed. Then, the taken pollen is sprayed on a petri dish coated with a culture medium such as agar. Further, a plurality of locations having the same area are selected in all the petri dishes, and the number of pollen germinated in all the pollens at the specific location is measured.

(5) Investigation date The investigation date of the germination status of the pollen sprayed with the reagent was May 2
8 days. The test date of the test tree sprayed with each reagent was
June 26. (6) Results The tests as described above were performed, and the results are shown in Table 3. Table 3
Shows the relationship between the rate of pollen germination and the rate of fruit set depending on the type of flowering agent applied. The germination rate of the pollen in Table 3 is the ratio of the germinated pollen to the total pollen in the petri dish.
The fruit set rate is the ratio of flower buds that have set among the flower buds that have opened.

[0041]

[Table 3]

(7) Evaluation First, the difference in the germination of pollen due to application of the untreated, lime-sulfur mixture and calcium formate will be examined. The germination rate of the pollen collected from the untreated test tree was 40 to 50%. Next, looking at the germination rate of pollen collected from the test tree sprayed with the lime-sulfur mixture, which is a conventional flowering agent,
30%. Next, the germination rate of pollen collected from the test tree sprayed with the calcium formate of the present invention was 5%.
-10%.

From the above results, it can be seen that the germination rate of the pollen of the calcium formate of the present invention is lower than the germination rate of the lime-sulfur combination, which is a conventional flower remover. Therefore, it was found that calcium formate had a high effect of suppressing germination of pollen. In addition, the relationship between the germination rate of the pollen of calcium formate, lime-sulfur mixture and untreated in Test 1 and the fruit set rate of the fruit on June 26 will be examined.

First, the relationship between the germination rate of untreated pollen and the fruit set rate, which is a criterion for comparing the flower-picking effects of flower-picking agents, will be described. It can be seen that the pollen germinates almost half, and the fruit of the central fruit of the top bud reaches nearly 90%, and that many fruits other than the central fruit of the top bud also produce fruit. Next, the relation between the germination rate of pollen and the fruit set rate of lime-sulfur mixture, which has been conventionally used as a flower remover, will be examined.

Pollen germinates only about 10 to 30%. As proportional to the pollen germination, the fruit set of the central bud of the apical bud and axillary bud is reduced by about 10% as compared with the untreated one.
In addition, the fruit set of the side buds of the top buds is reduced to less than half the number of the untreated plants. The fruit set of axillary buds has increased compared to untreated but the number of fruits is relatively small, so there is almost no effect on the whole fruit set. Also, it is often preferable that the fruit of the central fruit be reduced to some extent. The reason is that the nutrients of the tree concentrate on the remaining fruit as much as the fruit set decreases, and the remaining fruit becomes more fruitful. As described above, the relationship between the germination rate of pollen and the fruit set rate of the lime-sulfur mixture is that the fruit set rate is reduced in proportion to the decrease in the germination rate compared to the untreated one. .

Next, the relationship between the pollen germination rate of the calcium formate of the present invention and the fruit set rate will be examined. Pollen is 5
Only about 10% germinate. As proportional to the germination of pollen, the fruiting of the apical buds and the central fruit of the axillary buds is slightly reduced as compared with the lime sulfur mixture. In addition, the fruit of the side bud of the top bud is
Reduced to less than half compared to lime sulfur mixture. And the fruit set of axillary buds is slightly reduced compared to the untreated. As described above, the relationship between the germination rate of the pollen of calcium formate and the fruit set rate of the fruit is such that the fruit set rate is proportionally reduced by the reduced germination rate as compared with the non-treatment. Furthermore, the germination rate of calcium formate is lower than the germination rate of the lime-sulfur mixture, and is similarly lower with respect to the fruit set rate. Therefore,
Since calcium formate has a higher effect of suppressing germination of pollen than a lime-sulfur mixture, it is presumed that the effect of flower removal is also high.

Next, in 1997, in the cultivation department of the Akita Prefectural Fruit Tree Experimental Station, the test tree apple Makita Gold was
A test was conducted to confirm the effect of flowering with calcium salts. In Test 4 of the fourth example, the germination rate of pollen sprayed with each reagent was observed. 4) Test 4 (Fourth Example) (1) Reagents The following reagents were used as reagents. In addition, it was set as untreated (Comparative Example 1) so that the case where the reagent was not sprayed, which is the standard for comparing the germination inhibitory effects of the respective reagents, was easily understood. In addition, pH shows the case of 1% aqueous solution.

Calcium formate, pH 7.02, 100-fold aqueous solution (Example 1) Calcium formate, pH 7.02, 300-fold aqueous solution (Example 8) Ca sulfate Ca chloride Ca citrate Ca mixture pH 6.80 1
00-fold aqueous solution (Example 9) (2) Investigation method After pollen collected from a test tree was sprayed on an agar medium of a petri dish, a test solution was sprayed. Then, the same area is selected at a plurality of locations in all the petri dishes, and the number of pollen germinated in all the pollens at the specific location is measured.

(3) Investigation day The pollen in the petri dish was sprayed with the test solution on May 13
Day. The survey date of the pollen germination status in the petri dish is May 14th. (4) Results The tests as described above were performed, and the results are shown in Table 4. Table 4
The figure shows the pollen germination rate due to the difference between flower removers. The germination rate of the pollen in Table 4 is a ratio of the germinated pollen to all the pollens at a specific location in the petri dish.

[0050]

[Table 4]

(5) Evaluation The germination rate of untreated petri dishes was 79.2%.
Met. Then, the germination rate of the pollen of the petri dish sprayed with water was 77.6%. On the other hand, the germination rate of the petals of the petri dish sprayed with the Ca sulfate / Ca chloride / Ca citrate mixture is 59.5%, which indicates an effect of suppressing germination. Further, the germination rate of the petri dish sprayed with calcium formate was 39.5% in a 100-fold aqueous solution, which was about half the germination rate of the untreated or water-dispersed pollen. And a suitable germination inhibitory effect is observed. In addition, as for calcium formate, the germination rate is 40.2% for pollen sprayed with a 300-fold aqueous solution, and a suitable germination inhibitory effect is recognized.

Next, in 1997, a test was conducted in a fruit tree laboratory of the Iwate Prefectural Agricultural Research Center (former Iwate Prefectural Horticultural Experiment Station) to confirm the effect of flowering by calcium salts on the test tree Apple Fuji. . Test 5 of the fifth embodiment
The flowering effect of each reagent is observed from the fruit set rate of the test plot in which each reagent was sprayed.

5) Test 5 (Fifth Example) (1) Reagents The following reagents were used. In addition, the test section which was not sprayed with the reagent agent, which is the standard for comparing the flower removing effect of each reagent agent, was not treated (Comparative Example 1) so as to be easily understood. In addition, pH shows the case of 1% aqueous solution.

Calcium formate, pH 7.02, 100-fold aqueous solution (Example 1) Calcium propionate, pH 7.78, 100-fold aqueous solution (Example 10) Ca sulfate, Ca chloride, Ca citrate, Ca mixture, pH 6.80 2
00-fold aqueous solution (Example 11) Calcium acetate pH 7.67 100-fold aqueous solution (Example 12) Calcium nitrate pH 6.79 500-fold aqueous solution (Example 13) Calcium ethylenediaminetetraacetate pH 7.90 1
00-fold aqueous solution (Example 14) Calcium chloride pH6.81 500-fold aqueous solution (Example 15) Lime-sulfur mixture pH10.6 100-fold aqueous solution (Comparative Example 2) (2) Day of flowering and pollination The flowering start was May 5 and the flowering full bloom was May 9. The pollination of the test tree was performed by artificial pollination on May 6 for the central flower of the 50 buds of the top bud.

(3) Spraying day Each reagent was sprayed on each flower flora on May 8 using a hand spray. (4) Test plot and spraying rate There are two test plots for testing each reagent. The volume of each reagent is 200 milliliters.

(5) Survey Date The survey date of the test tree on which each reagent was sprayed is June 26. (6) Results The test as described above was performed, and the results are shown in Table 5. Table 5
Shows the flowering effect from the fruit set rate of each test agent and the untreated test plot. The fruit set rate in Table 5 is the percentage of flower buds that set among the flower buds that opened.

[0057]

[Table 5]

(7) Evaluation First, looking at the fruiting rate of the central flower of the top bud, the fruiting rate of the test plot of each calcium salt was lower than that of the untreated test plot. Or equivalent. Among these, calcium formate, calcium propionate, and calcium ethylenediaminetetraacetate had particularly low fruit set rates.

Next, looking at the fruiting rate of the lateral flower of the top bud,
The seed setting rate of the untreated test plot was 17.3%, which was lower than that of the test plot for each calcium salt. Considering that it is better that the fruit other than the central fruit of the top bud is not as rich as a flower remover, it is recognized that each calcium salt is effective as a flower remover. Calcium formate, calcium propionate, and calcium ethylenediaminetetraacetate had particularly low fruit set rates. Each of these calcium salts is less than half the fruiting rate of the untreated test plot, and exhibits a suitable effect as a flowering agent.
In addition, these calcium salts have a flowering effect equal to or higher than that of a conventional lime-sulfur mixture, and are suitable as flowering agents.

Next, in 1997, a test was conducted at the Nanshin Agricultural Experiment Station in Nagano Prefecture to confirm the effect of calcium formate on flower removal on the test tree Apple Fuji. In Test 6 of the sixth example, the flower-picking effect of each of the reagents was examined based on the fruit drop rate of the untreated test group with calcium formate, lime-sulfur mixture.

In addition, a test was conducted to confirm the effect of flower removal by calcium formate on the test tree-free water. Test 7 of the seventh example is to check the flower-pickling effect of calcium formate from the fruit drop rate of the test group without treatment with calcium formate. 6) Test 6 (Sixth Example) (1) Reagents The following reagents were used as reagents. In addition, the test section which was not sprayed with the reagent agent, which is the standard for comparing the flower removing effect of each reagent agent, was not treated (Comparative Example 1) so as to be easily understood. In addition, pH shows the case of 1% aqueous solution.

100% aqueous solution of calcium formate, pH 7.02 (Example 1) 500-fold aqueous solution of calcium formate, pH 7.02 (Example 16) Lime sulfur mixture, pH 10.6 100-fold aqueous solution (Comparative Example 2) (2) Date of flowering and Pollination Day In the test tree of this test, flowering started on April 23 and flowering on full bloom on April 29. The pollination of the test tree is 4
On May 29, artificial pollination was performed at three locations in units of side branches.

(3) Spray Date Spraying of each reagent agent is on April 30. (4) Test plot and amount of spray The test plots for testing each reagent were three test plots per side branch. The volume of each reagent is 3 liters.

(5) Survey Date The survey date of the test tree on which each reagent was sprayed is June 6. (6) Results The tests as described above were performed, and the results are shown in Table 6. Table 6
Shows the flower-picking effect based on the fruit set rate of the untreated test plot with calcium formate, lime-sulfur mixture. The fruit set rate in Table 6 is the percentage of flower buds that set among the flower buds that opened. The fruit drop rate is
It is the percentage of flower buds that have fallen out of flowering buds.

[0065]

[Table 6]

(7) Evaluation Looking at the average fruit drop rate of the untreated test plot, the central fruit was 1%.
1.7% and side crop was 58.8%. In addition, looking at the average rate of fruit drop in the test section of the lime-sulfur mixture, the central fruit was 18.6% and the side fruit was 61.1%. From this, it can be seen that in this test tree, there are many physiological droppings in the side fruits. However, it is presumed that the central fruit has a flowering effect.

The average fruit drop rate in the test plot of the 100-fold aqueous solution of calcium formate showed that the central fruit was 23.1%.
The lateral fruit is 77.6%, and as in the above, the effect of physiological fruit drop is considered for the lateral fruit, and a high flowering effect is not obtained, but the central fruit is an untreated test. More than twice the fruit drop rate can be obtained compared to the ward. Therefore, even in consideration of many physiological fruit drop in this test,
It is recognized that calcium formate has a high flowering effect. In addition, looking at the average rate of fruit drop in the test plot of a 500-fold aqueous solution of calcium formate, a flowering effect equivalent to that of the lime sulfur mixture was obtained.

7) Test 7 (Seventh Example) (1) Reagents The following reagents were used as reagents. In addition, the test section where the test agent was not sprayed, which is a reference for comparing the flower removing effect of each test agent, was untreated (Comparative Example 1) so as to be easily understood. In addition, pH shows the case of 1% aqueous solution.

Calcium formate, pH 7.02, 100-fold aqueous solution (Example 1) Calcium formate, pH 7.02, 500-fold aqueous solution (Example 16) (2) Day of flowering and pollination On the test tree of this test, flowering started on April 14 It is the day, and flowering full bloom is on April 20. For the pollination of the test tree, artificial pollination was carried out on April 20 at three locations per side branch.

(3) Spray Date The spray date of each reagent is April 21. (4) Test plot and amount of spray The test plots for testing each reagent were three test plots per side branch. The volume of each reagent is 150 milliliters.

(5) Survey Date The survey date of the test tree on which each reagent was sprayed is May 30. (6) Results The tests as described above were performed, and the results are shown in Table 7. Table 7
Shows the flower removing effect from the fruit drop rate in the test plots of the 100 times aqueous solution of calcium formate and the 500 times aqueous solution of calcium formate. The fruit set rate in Table 7 is the percentage of flower buds that set among the flower buds that opened.
The fruit drop rate was calculated from the ratio of the fruit set rate on May 30 to the fruit set rate on May 4.

[0072]

[Table 7]

(7) Evaluation Looking at the average fruit drop rate of the untreated test plot, it was found that 4
9.2% and axillary buds were 33.1%. On the other hand, when looking at the average fruit drop rate in the test plot of a 100-fold aqueous solution of calcium formate, the short branch was 61.7% and the axillary bud fruit was 72.2%. The test zone for calcium formate
Axillary buds show more than twice the fruit drop rate as compared to the untreated test plot. Therefore, calcium formate can drop axillary buds and concentrate nutrients on short fruit branches. Also, in the test plot of the 500-fold aqueous solution of calcium formate, the flower removing effect was obtained as compared with the untreated test plot.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01N 59/06 A01G 7/00 604 A01N 37/02 A01N 37/36 A01N 37/44

Claims (9)

(57) [Claims] 1. A flower remover for deciduous fruit trees, comprising water-soluble inorganic acid calcium as an active ingredient. 2. The flower remover according to claim 1, wherein the inorganic acid calcium is calcium chloride . 3. The method according to claim 2, wherein the inorganic acid calcium is calcium nitrate.
The flower remover according to claim 1, wherein 4. A method of using calcium formate as an active ingredient.
Characterized as a flower remover for deciduous fruit trees. 5. A method comprising using calcium acetate as an active ingredient.
Characterized as a flower remover for deciduous fruit trees. 6. Calcium propionate as an active ingredient.
A flower remover for deciduous fruit trees. 7. A composition comprising calcium ethylenediaminetetraacetate.
A flower remover for deciduous fruit trees, characterized as an active ingredient. 8. Calcium sulfate calcium chloride citric acid
Leaf litter characterized by using a calcium mixture as an active ingredient
Fruit tree flower remover. 9. An aqueous solution having a concentration of the active ingredient of 1%.
Wherein the pH is between 6 and 8
The flower remover according to any of item 8 above.