JP3011534B2 - Life prolonging agent for cut flowers and life prolonging 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 life prolonging agent for cut flowers and a method for prolonging life.

[0002]

2. Description of the Related Art Generally, cut flowers are cut at a planted area by a producer, shipped to a market, and sold to consumers at retail stores. After being cut, the time it takes to reach consumers has been reduced as much as possible, but it is likely to have taken one or more days. During this time, the freshness of the flower is reduced, shortening its life span to consumers. For this reason, various means for extending the life of cut flowers have conventionally been taken.

[0003] There are pre-treatment methods and post-treatment methods for extending the life of flowers. The pretreatment method is a method of treating cut flowers after harvesting and before being immersed in water, and includes, for example, a method of cutting stems in water, a method of baking cuts, and a method of treating with silver thiosulfate. The post-treatment method is intended to be used by retailers and consumers continuously in addition to the water in the vase to extend the shelf life. For example, promotion of water raising by the addition of a surfactant, addition of nutrients such as sugar,
There is a method of preventing decay of water by adding a bactericide. JP-A-61-165301 discloses a cut flower life-promoting agent which generates oxygen in water like hydrogen peroxide.
No. 249701 discloses a preservative for cut flowers containing an hydrogen peroxide adduct of an inorganic compound as an active ingredient.

[0004]

The method of cutting stems in water by a pretreatment method and the method of baking cuts are not sufficient even if they have some effects. The method of treating with silver thiosulfate is quite effective and widely used, but since silver thiosulfate is produced by mixing sodium thiosulfate and expensive silver nitrate at a fixed ratio, The method is costly. In addition, silver nitrate is dangerous and dangerous, and is toxic, so it cannot be handled easily by consumers. Furthermore, this silver thiosulfate does not have an effect on all flowers, and has no effect on roses and chrysanthemums. (Chemistry and Industry 41 , 197 (19
88))

[0005] In any of the post-treatment methods, additives must be added again each time water is changed, which is considerably troublesome. Also, by immersing cut flowers for a long time,
Some additives may harm the flowers. The most reliable and effective method is to change the water frequently, but for a large number of containers this is labor intensive and difficult in practice.

The present inventors have proposed a flower life-prolonging agent that makes cut flowers containing roses and chrysat last longer without changing water or adding any water by pretreatment safely and easily. As a result of diligent research for the purpose of providing such means, the present invention has been completed.

[0007]

That is, the present invention relates to a life prolonging agent for cut flowers containing a water-soluble organic peroxide. Examples of the water-soluble organic peroxide include peracetic acid, formic acid, monoperphthalic acid, persuccinic acid, permaleic acid, and pertrifluorocarbonate. Peracetic acid is preferred because it is easily available. The water-soluble organic peroxide can also be obtained by mixing hydrogen peroxide or a peroxide that generates hydrogen peroxide in an aqueous solution with an activator that reacts with the peroxide to generate an organic peroxide. .

The peroxides that generate hydrogen peroxide in an aqueous solution include sodium percarbonate, sodium perborate, sodium tripolyphosphate hydrogen peroxide adduct, sodium pyrophosphate hydrogen peroxide adduct, sodium sulfate-hydrogen peroxide −
Examples thereof include sodium chloride double salt, urea hydrogen peroxide adduct, and melamine hydrogen peroxide adduct. Examples of the activator include glucose pentaacetate, tetraacetylethylenediamine, tetraacetylglycoluril, acetic anhydride, phthalic anhydride, and succinic anhydride.

The method of prolonging the life is extremely simple. It is only necessary to immerse a part of a stem including a cut end of a cut flower in an aqueous solution of a water-soluble organic peroxide, and then to live the city water normally. The concentration of the aqueous solution of the water-soluble organic peroxide is preferably 0.001 to 50%, more preferably 0.005 to 20%. The immersion time is 1 minute to 24 hours. When the concentration of the organic peroxide is high, the immersion time is short, and when the concentration is low, the immersion time is long.
If it is less than 1 minute, there is no effect, and if it is immersed for more than 24 hours, the chemical damage of the organic peroxide that has penetrated from the conduit of the cut flower comes out and the effect is opposite.

When a surfactant is added to a water-soluble organic peroxide aqueous solution, the immersion time can be shortened because the organic peroxide aqueous solution easily permeates the conduit. The addition amount of the surfactant is preferably 0.01 to 1%. After being placed in city water, you may change the water, but you can extend the life of cut flowers for a long time without changing the water.

[0011]

It is known that the main causes of the fall of cut flowers are the decrease in dissolved oxygen in water due to the decay of water and the obstruction of conduits. That is, the organic matter eluted from the cut end of the stem of the cut flower and the stem surface became a nutrient source of the microorganism, and a large amount of the microorganism was propagated in the water. This is because the conduit is obstructed by secretions of bacteria, especially filamentous fungi, and it becomes difficult to absorb water. In general, the decrease in dissolved oxygen in water is considered to be a decrease due to the respiratory action of cut flowers, and in order to compensate for this dissolved oxygen, the addition of a substance that generates oxygen in water has been considered. In the experiment, it was found that the consumption of dissolved oxygen by the cut flowers was small, and rather the consumption by dissolved microorganisms was large.

In the present invention, the water-soluble organic peroxide is
Acts as a fungicide, suppresses the growth of microorganisms in the water and in the conduit of cut flowers, prevents the decrease of dissolved oxygen in the water,
It is also presumed to have the effect of preventing the conduit from being blocked.

[0013]

The present invention will be described in detail with reference to the following examples. Examples 1 to 4 A small chrysanthemum cut into a length of 30 cm with water in a knife was immersed in a 0.01% aqueous solution of peracetic acid at a stem of 10 cm from the cut for a predetermined time, and then immersed in 300 ml of city water. After 10 days, the state of the cut flowers was observed, and the dissolved oxygen in the water was measured. Table 1 shows the results. In addition, the thing which lived in the city water immediately after cutting | disconnecting in water and the thing which lived in the 0.04% aqueous hydrogen peroxide solution were shown as a comparative example.

(Table 1) Immersion time Dissolved oxygen State of cut flower --------------------------------------------------------------------------------------------------------- Example 1 1 minute 6.7ppm Freshness 210 10 minutes 7.3ppm ３ 360 minutes 7.7ppm ４ 45 hours 7.1ppm 比較 Comparative Example 1 Water 5.8ppm Withered 2H2O2 (0.04%) solution 6.7ppm 〃

Examples 5 to 6 A chrysanthemum with a flower of about 10 cm in diameter was cut into a length of 50 cm with a knife in water, and three pieces of perilla were used at a peracetic acid concentration of 0.01% and 0.1%.
A stem of 10 cm from the cut was immersed in a 03% aqueous solution for 1 hour, and then placed in 500 ml of city water to observe the state of cut flowers after 10 days, and the dissolved oxygen in water was measured. The amount of water sucked was measured. Table 2 shows the results. Water was added once a day.
These were compared with those that were cut in water and immediately lived in city water.

(Table 2) Suction of water Peracetic acid concentration Dissolved oxygen Increased amount / day Cut flower condition -------------------------------------------- −−−−− Example 5 0.01% 6.9 ppm 43 ml Native 6 0.03% 7.0 ppm 47 ml 例 Comparative Example 3 −5.6 10 ml Withered

EXAMPLE 7 A chrysanthemum with a flower of about 10 cm in diameter was cut into a length of 50 cm with a knife in water, and three pieces of the chrysanthemum were subjected to a peracetic acid concentration of 0.01% and a nonionic surfactant concentration of 0.1%. The stem portion 10 cm from the cut was immersed in the aqueous solution for 30 minutes, and then placed in 500 ml of city water to observe the state of the cut flower 10 days later. The cut flowers are kept fresh and the dissolved oxygen in the water is 7.
0ppm, 50ml of water per day for cut flowers
Met.

Example 8 A cut rose flower cut into a length of 30 cm with a knife in water 1
The book was placed in an aqueous solution with a peracetic acid concentration of
After immersing the stem of 0 cm for 1 hour, the stalk was placed in a 500 ml Erlenmeyer flask containing city water, and the state of the flower, the dissolved oxygen in the water, and the amount of water sucked up after 9 days were examined. Table 3 shows the results. In addition, it was similarly cut in water and immediately compared with one that had been lived in city water.

(Table 3) Dissolved oxygen (ppm) Water on the ninth day Water absorption on the first day and the ninth day State of cut flowers −−−−−−−−−−−−−−−−−−−−−−−− -------------------------------------------------------------------------------------------------------------------

[0020]

According to the present invention, cut flowers laid in city water can be kept fresh for a long time without changing water.

Claims (3)

(57) [Claims] 1. A life-promoting agent for cut flowers, comprising a water-soluble organic peroxide. 2. A life-prolonging agent wherein the water-soluble organic peroxide according to claim 1 is peracetic acid. 3. A method for extending the life of cut flowers immersed in city water after soaking the cut flowers in an aqueous solution of a water-soluble organic peroxide for 1 minute to 24 hours.