Inchlozate suspending agent as well as preparation method and application thereof

Abstract

The invention relates to an ethychlozate suspending agent as well as a preparation method and application thereof, and belongs to the technical field of plant growth regulators. The ethychlozate suspending agent mainly comprises water and the following components in percentage by mass: 5-20% of ethychlozate, 0.5-4% of a wetting agent, 0.3-3% of a dispersing agent, 1-2% of a thickening agent, 0.05-0.1% of a stabilizing agent and 4-10% of an anti-freezing agent, the wetting agent is selected from one of a sulfate anionic wetting agent, polyoxyethylene ether and isodecyl alcohol polyoxyethylene ether; the stabilizer is selected from one of formic acid, acetic acid, citric acid, sulfamic acid, sorbitol and sodium tripolyphosphate; the pH value of the ethychlozate suspending agent is 4 to 7. The ethychlozate suspending agent disclosed by the invention is high in suspension rate and good in low-temperature stability and heat storage stability in the storage and water-added use processes, can keep the drug effect stability of ethychlozate, and can adapt to reservoir conditions of various regions with relatively large temperature difference between south and north in China.

Description

Technical Field

[0001] The invention relates to an indole ester suspension and a preparation method and application thereof, belonging to the technical field of plant growth regulators. Background Art

[0002] Figaron (trade name: Figaron, other names: J-455, IAZZ, Fuguole, Fengguole, the active ingredient is ethyl 5-chloro-1-hydrogen-3-indazole acetate), is a new type of highly effective plant growth regulator. The original drug is white crystals with a melting point of 75-78°C and decomposes at about 250°C in the air. Indaron is insoluble in water, but easily soluble in organic solvents such as acetone, ethanol, methanol, and formaldehyde. It is stable under normal storage conditions and easily decomposes when exposed to alkali.

[0003] Indole ester is the only plant growth regulator that can both thin out fruits and improve fruit quality. It has different physiological activities from naphthylacetic acid and 2,4-D. It has the advantages of ripening, sweetening, improving fruit quality, low dosage, good yield increase effect, low toxicity, low environmental pollution, and easy use. It is widely used in economic crops such as citrus, watermelon, apple, peach, and grape. This product has the characteristics of high technology content, high added value, and high output value. It has a broad market prospect and plays an important role in improving the quality and increasing the yield of my country's economic crops. At present, the commonly used indole esters on the market are mainly emulsifiable concentrates.

[0004] EC is one of the basic formulations of pesticides. It is a homogeneous transparent oily liquid made by dissolving the original pesticide (crude oil or powder) in an organic solvent (xylene, toluene, methylnaphthalene, isopropanol, methyl isobutyl ketone, etc.) in a specified proportion, and then adding a certain amount of special emulsifier for pesticides. The ability to form a relatively stable emulsion when adding water is one of the important properties of EC. When in use, it is generally diluted with a large amount of water to form a stable emulsion and then spread with a sprayer. Due to the high content of active ingredients in emulsifiable concentrates, usually between 20% and 50%, emulsifiable concentrates have high efficacy, but they also have some disadvantages, mainly including: ① Poor safety: For example, they contain a considerable amount of flammable organic solvents, which makes the emulsifiable concentrate less safe during processing and storage, and there is a risk of easy combustion, and it is easy to cause adverse reactions such as skin irritation and respiratory discomfort during use; ② Poor stability: Its stability is not as good as other types of pesticide formulations, and it is easy to precipitate and decompose, which affects the effect of pesticides; ③ Serious environmental pollution: Most of the solvents used in emulsifiable concentrates are aromatic compounds, which cause serious environmental pollution after use, and the toxic substances released will cause irreversible damage to the ecological environment. In view of the shortcomings of emulsifiable concentrate formulations and the commonly used formulations of indole esters on the market, it is of great significance to develop an indole ester product with strong storage stability and green environmental friendliness to expand the scope of application of indole esters and improve their application value. Summary of the invention

[0005] The first object of the present invention is to provide an indole ester suspension, and to provide an indole ester product which is stable in storage and has little environmental pollution.

[0006] The second object of the present invention is to provide a method for preparing an indole ester suspension, and to provide a method for preparing an indole ester product which has strong storage stability and little environmental pollution.

[0007] The third object of the present invention is to provide an application of an indole ester suspension in improving the quality of fruits, thereby providing a safe and effective method for improving the quality of fruits in the prior art.

[0008] In order to achieve the above object, the technical solution of an indole ester suspension in the present invention is:

[0009] The invention discloses an indole ester suspension, which is mainly composed of water and the following components in percentage by mass: 5-20% indole ester, 0.5-4% wetting agent, 0.3-3% dispersant, 1-2% thickener, 0.05-0.1% stabilizer and 4-10% antifreeze agent; the wetting agent is selected from one of sulfate anionic wetting agents, polyoxyethylene ether and isodecyl alcohol polyoxyethylene ether; the stabilizer is selected from one of formic acid, acetic acid, citric acid, aminosulfonic acid, sorbitol and sodium tripolyphosphate; the pH value of the indole ester suspension is 4-7.

[0010] The beneficial effect of the above technical scheme is that the indole ester suspension of the present invention is a pioneering invention. Through a large number of experiments, the present invention preferably selects a wetting agent, a dispersant, a thickener and a stabilizer that match indole ester, and each component cooperates with each other to form an indole ester suspension. The indole ester suspension of the present invention has excellent properties, wherein the suspension rate of indole ester is high, the content of residues after pouring and washing is low, the passing rate through the 75μm aperture standard sieve is high, and the foam amount in the persistent foaming test is low; no stratification occurs at 0±2℃ low temperature storage for 7 days and 54±2℃ storage for 14 days, and the low temperature stability and heat storage stability tests meet the national standards of suspension preparations and liquid preparations in my country, showing excellent low temperature stability and heat storage stability, and can adapt to the reservoir conditions of various regions in my country with large temperature differences between the north and the south, maintain the stability of the efficacy of indole ester, and ensure that the suspension is stored for a long time without affecting its efficacy.

[0011] The wetting agent reduces the surface tension or interfacial tension of indole ester, allowing water to spread on its surface or penetrate into the surface, effectively increasing the wetting rate of the suspension, making it easier to process and use the preparation. The use of the above-mentioned type of wetting agent can effectively reduce the surface tension of indole ester, allowing water to spread evenly on the surface of indole ester, effectively increasing the wetting rate of the indole ester suspension, helping to improve production efficiency and the effect of actual application.

[0012] Preferably, the wetting agent is selected from one of YUS-FS7PG (sulfate anionic wetting agent), YUS-D1109S (polyoxyethylene ether), and RHODASURF 860 / P (isodecyl alcohol polyoxyethylene ether).

[0013] The stabilizer can effectively reduce the heat storage decomposition rate of the active ingredient indole ester and improve the heat storage stability of the suspension; the use of the above-mentioned type of stabilizer can maintain the pH of the suspension in the range of 4 to 7, effectively prevent the decomposition of indole ester and ensure the content of indole ester in the suspension.

[0014] Dispersants can effectively improve the dispersion effect of suspensions in water, making it easier to use them; thickeners can effectively improve the thermal storage stability and fluidity of suspensions.

[0015] Specifically, the suspension concentrate is a suspension preparation with a particle size of 0.5 to 5 μm formed by wet grinding with a sand mill, which is composed of a solid technical drug with low water solubility and high melting point, and a suitable wetting agent, dispersant, viscosity enhancer, antifreeze agent and water. It can still maintain high suspension performance after being diluted with water. The preparation can be directly diluted with water and sprayed according to the dosage.

[0016] As a further improvement, the dispersant is selected from one of lignin sulfonate, polynaphthaldehyde sulfonate, polycarboxylate, and alkylnaphthalene sulfonate.

[0017] The beneficial effect of the above technical solution is that the above type of dispersant can be well compatible with the components in the system, effectively improve the water dispersion effect of the suspension, and help improve the subsequent application effect of the suspension.

[0018] Preferably, the dispersant is selected from one of YUS-RXB (lignin sulfonate anion), YUS-207K (polynaphthaldehyde sulfonate), K77S (polycarboxylates), MNS90 (alkyl naphthalene sulfonate), and YUS-WG4 (lignin sulfonate).

[0019] As a further improvement, the thickener is xanthan gum and magnesium aluminum silicate; the mass ratio of the xanthan gum to magnesium aluminum silicate is (0.2-1):(0.8-1).

[0020] The beneficial effect of the above technical solution is that the use of the above type and amount of thickener can effectively improve the heat storage stability of the suspension while ensuring that the suspension has good fluidity.

[0021] As a further improvement, the antifreeze agent is selected from one of ethylene glycol, propylene glycol or glycerol.

[0022] As a further improvement, the indole ester suspension is mainly composed of water and the following components in percentage by mass: 5-20% indole ester, 2-4% wetting agent, 2-3% dispersant, 1-2% thickener, 0.05-0.1% stabilizer, and 4-10% antifreeze; the wetting agent is polyoxyethylene ether; the dispersant is one of polynaphthaldehyde sulfonate or polycarboxylate; the pH of the indole ester suspension is 4-7.

[0023] As a further improvement, the indole ester suspension includes one or both of a defoaming agent and a preservative; the defoaming agent is selected from one of organic siloxanes, silicones or tributyl phosphate; the mass percentage of the defoaming agent in the indole ester suspension is 0.05-0.1%; the preservative is selected from one or both of kason and sodium benzoate.

[0024] The beneficial effects of the above technical solution are: the preservative can effectively improve the stability of the suspension by inhibiting the production of microorganisms; and the defoaming agent can effectively inhibit or eliminate foam during production and transportation, which is beneficial to filling, etc.

[0025] In order to achieve the above object, the technical scheme of the preparation method of indole ester suspension in the present invention is:

[0026] A method for preparing an indole ester suspension, comprising the following steps: mixing indole ester, a wetting agent, a dispersant, a stabilizer, a thickener, an antifreeze agent and other additives uniformly, and grinding to obtain the suspension; the particle size D of the material obtained after grinding is 90 ≤5μm.

[0027] The beneficial effects of the above technical scheme are: the preparation process of the indole ester suspension of the present invention is safe, the process is simple, the suspension rate of the finished suspension is high, and it has the advantages of good physical stability, good stability after dilution with water, strong adhesion, not easy to be washed away by rainwater, low cost, safe production, storage and transportation, and easy use.

[0028] In order to achieve the above object, the technical scheme of the application of the indole ester suspension in improving the quality of fruits in the present invention is:

[0029] The invention discloses an application of an indole ester suspension in improving the quality of fruits, wherein the improvement of the quality of fruits is to increase the sweetness of fruits and / or promote the coloring of fruits.

[0030] The beneficial effect of the above technical solution is that: the present invention proves through experiments that, under the condition of the same active ingredients, compared with the indole ester emulsifiable concentrate, the indole ester suspension provided by the present invention has a better coloring effect on grapes and a higher sweetness.

[0031] As a further improvement, the fruit is grapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a comparison chart of the effects of different treatment groups on grape coloring in Experimental Example 10 of the present invention. DETAILED DESCRIPTION

[0033] The indole ester described in the present invention is an indazole plant growth regulator, which can be absorbed by the stems and leaves of plants and then metabolized into 5-chloroindazole carboxylic acid in the plant body to play a physiological role; it can also inhibit the operation of auxin, promote rooting, increase the absorption of water and mineral elements by the root system, control vegetative growth, promote reproductive growth, and transport photosynthetic products to the fruit part as much as possible, and has the effects of early maturity and sugar increase, and is widely used in economic crops such as citrus, watermelon, apple, peach, grape, etc. Indole ester has the characteristics of high technical content, high added value, high output value, etc., has a broad market prospect, and also plays an important role in improving the quality of my country's economic crops and increasing the yield. The common dosage form is currently a 20% indole ester emulsifiable concentrate. However, indole ester emulsifiable concentrate has the disadvantages of poor safety, poor stability and serious environmental pollution during use. Based on this, the present invention provides an indole ester suspension.

[0034] The indole ester suspension of the present invention mainly consists of water and the following components in percentage by mass: 5-20% of indole ester, 0.5-4% of wetting agent, 0.3-3% of dispersant, 1-2% of thickener, 0.05-0.1% of stabilizer and 4-10% of antifreeze agent; the wetting agent is selected from one of sulfate anionic wetting agent, polyoxyethylene ether and isodecanol polyoxyethylene ether; the stabilizer is selected from one of formic acid, acetic acid, citric acid, aminosulfonic acid, sorbitol and sodium tripolyphosphate; the pH of the indole ester suspension is 4-7.

[0035] Furthermore, the present invention also provides a method for preparing the indole ester suspension, and the specific preparation method comprises the following steps:

[0036] 1) 24 to 48 hours before producing the indole ester suspension, add a thickener (xanthan gum) and a preservative into deionized water and stir mechanically until a uniform translucent viscous liquid without lumps is formed to obtain a thickener mother solution;

[0037] 2) adding the wetting agent, antifreeze agent, defoamer and stabilizer in the components into deionized water and stirring for 20 to 30 minutes, then adding the dispersant and thickener (magnesium aluminum silicate) and stirring for 20 to 25 minutes to obtain a mixed solution, then adding indole ester into the mixed solution, stirring and shearing for 30 to 40 minutes, after fully mixing and dispersing, adding the thickener mother solution prepared in step 1), and continuing to stir and shear for 20 to 30 minutes to obtain a mixed material;

[0038] 3) The mixed material is coarsely ground by a colloid mill, and then subjected to three-stage sand grinding, and the final particle size of the sand-milled material is D90≤5μm.

[0039] The present invention is further described below in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments. The equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments are all conventional methods in the art unless otherwise specified.

[0040] 1. A specific embodiment of an indole ester suspension and a preparation method thereof in the present invention:

[0041] Example 1

[0042] The indole ester suspension of the present embodiment has a formulation composition as shown in Table 1 below.

[0043] Table 1 Indole ester suspension formulation composition of Example 1

[0044]

[0045] The preparation method of the indole ester suspension of the present embodiment is as follows:

[0046] 1) Pre-made xanthan gum mother liquor

[0047] 24 hours before the suspension is prepared, xanthan gum and kason are added into deionized water and mechanically stirred once every 8 hours. The swollen xanthan gum mother liquor is a uniform translucent viscous liquid without lumps.

[0048] 2) Raw material mixing

[0049] Deionized water was added to the mixing kettle, stirring was started, and YUS-D1109S, ethylene glycol, tributyl phosphate, and formic acid were added in sequence, and stirred for 30 minutes after the feeding was completed; K77S and aluminum magnesium silicate were added, and stirring was completed for 30 minutes to obtain a mixed solution; indole ester was added to the above mixed solution, shearing was started, and shearing was performed for 50 minutes during the stirring process to fully mix and disperse the raw materials, and then the xanthan gum mother solution prepared in step 1) was added, and stirring and shearing were continued for 40 minutes to obtain a mixed material;

[0050] 3) Coarse and fine grinding of mixed materials

[0051] The mixed material is coarsely ground by a colloid mill, and then subjected to three-stage sand grinding, and the final particle size of the sand-milled material is D90≤5μm, thereby obtaining an indole ester suspension.

[0052] Example 2

[0053] The indole ester suspension of the present embodiment has a formulation composition as shown in Table 2 below.

[0054] Table 2 Indole ester suspension formulation composition of Example 2

[0055]

[0056] The preparation method of the indole ester suspension of this embodiment is as described in Example 1.

[0057] Example 3

[0058] The indole ester suspension of the present embodiment has a formulation composition as shown in Table 3 below.

[0059] Table 3 Indole ester suspension formulation of Example 3

[0060]

[0061] The preparation method of the indole ester suspension of this embodiment is as described in Example 1.

[0062] 2. Experimental Examples

[0063] The following experimental examples illustrate the screening process and results of the indole ester suspension formulations of the present invention.

[0064] In the following experimental examples, the suspension rate, pH value, pourability, persistent foaming, low temperature stability, thermal storage stability and other properties were measured according to the following methods:

[0065] 1. The suspension rate shall be determined in accordance with 4.2 of GB / T 14825.

[0066] 2. The pH value shall be determined in accordance with GB / T 1601.

[0067] 3. The dumping test shall be carried out in accordance with GB / T 31737.

[0068] 4. The persistent foaming test is carried out in accordance with GB / T 28137.

[0069] 5. The wet screening test shall be carried out according to the “wet screening method” in GB / T 16150.

[0070] 6. The low temperature stability test is carried out according to the "suspension preparation" method in GB / T 19137. After cold storage at 0±2℃ for 7 days, the beaker is taken out and returned to room temperature for suspension rate determination and wet sieving test. The product that meets the requirements of this standard is qualified.

[0071] 7. The determination of heat storage stability shall be carried out according to the "Liquid Preparation" method in GB / T 19136. Take 30 mL of the sample, store it at 54±2℃ for 14 days, take it out and return it to room temperature. For the sample whose mass has not changed, determine the mass fraction of the active ingredient according to 4.3 within 24 hours. The mass fraction of the active ingredient shall not be less than 95% of that before heat storage, and the pH value, wet sieve test, suspension rate and pourability shall meet the requirements of this standard.

[0072] Experimental Example 1 Screening of antifreeze

[0073] This experimental example screens the antifreeze in the indole ester suspension, and the antifreeze screening experiment is carried out according to Table 4.

[0074] Table 4 Screening experiment of antifreeze

[0075]

[0076] Under the same conditions (0±2℃), different antifreeze agents were used and the samples were placed at low temperature to observe whether crystals were precipitated. The results are shown in Table 5.

[0077] Table 5 Screening test results of antifreeze

[0078]

[0079] Combined with the above low temperature experiments, the addition of antifreeze improves the low temperature stability of the indole ester suspension. However, in experiment 5, a small amount of crystals precipitated at 0±2°C in 5 days, and due to the high price of propylene glycol, ethylene glycol was preferred as the antifreeze.

[0080] Experimental Example 2 Screening of Wetting Agents

[0081] This experimental example screens the wetting agent in the indole ester suspension, and the wetting agent screening experiment is carried out according to Table 6.

[0082] Table 6 Screening experiment of wetting agent

[0083]

[0084] On the basis of antifreeze screening, different wetting agents were added respectively, and the wetting phenomenon and persistent foaming of each sample were observed and measured to see whether the wetting time and foam volume were high. The results are shown in Table 7.

[0085] Table 7 Screening test results of wetting agents

[0086]

[0087] Combined with the above experiments, by adding different wetting agents, the wetting rate of the preparation can be effectively improved, which is convenient for production and application. By comparing the persistent foaming properties of each sample and combining it with the field use, considering that high foam volume can easily cause inconvenience in use, it is advisable to keep the foam volume below 30mL, and YUS-D1109S is preferably used as the wetting agent.

[0088] Experimental Example 3 Screening of dispersants

[0089] This experimental example screens the dispersants in the indole ester suspension, and the screening experiment of the dispersants is carried out according to Table 8.

[0090] Table 8 Screening experiment of dispersant

[0091]

[0092]

[0093] Based on the screening of antifreeze and wetting agents, different dispersants were added respectively, and the water dispersion phenomenon of each sample was observed and measured. The results are shown in Table 9.

[0094] Table 9 Screening test results of dispersants

[0095]

[0096] Combined with the above experiments, by adding different dispersants, the water dispersion effect of the preparation can be effectively improved, which is convenient for the application of the suspension. According to the results of Experiment 5, the water dispersion is faster, and K77S added in Experiment 5 is preferably used as the dispersant.

[0097] Experimental Example 4 Screening of defoaming agent

[0098] This experimental example screens the defoaming agent in the indole ester suspension, and the screening experiment of the defoaming agent is carried out according to Table 10.

[0099] Table 10 Screening experiment of defoamer

[0100]

[0101] On the basis of wetting agent YUS-D1109S and dispersant K77S, different defoaming agents were added respectively, the defoaming results of each sample were observed, and the foam amount was measured. The results are shown in Table 11.

[0102] Table 11 Screening test results of defoamers

[0103]

[0104]

[0105] Combined with the above experiments, the generation of foam can be effectively suppressed or eliminated by adding different types of defoaming agents. Considering the factors that high amount of foam may cause inconvenience in filling and flying defense, and silicone is easy to decompose in water, tributyl phosphate in Experiment 4 is preferred as the defoaming agent.

[0106] Experimental Example 5 Screening of Stabilizers

[0107] This experimental example screens the stabilizer in the indole ester suspension, and the screening experiment of the stabilizer is carried out according to Table 12.

[0108] Table 12 Screening experiment of stabilizer

[0109]

[0110] Since indole ester decomposes under alkaline conditions, different stabilizers were used to adjust the pH of the samples to below neutral. The samples were heat stored at 54°C and the content of the active ingredient was measured after 14 days. The decomposition rate of the active ingredient was calculated. The results are shown in Table 13.

[0111] Table 13 Screening test results of stabilizers

[0112]

[0113]

[0114] In combination with the above experiments, different stabilizers were added and heat stored at 54±2℃ for 14 days. The decomposition rate of each sample was measured. The decomposition rate of indole ester after adding the stabilizer was less than 5%, which improved the heat storage stability of the suspension. The decomposition rate of the active ingredient after adding the stabilizer was compared. The decomposition rate of Experiment 2 was the lowest, and formic acid was preferred.

[0115] Experimental Example 6 Selection of Thickener

[0116] This experimental example screens the thickener in the indole ester suspension, and the thickener screening experiment is carried out according to Table 14.

[0117] Table 14 Screening experiment of thickener

[0118]

[0119] Based on the screening of antifreeze, wetting and dispersing agent, stabilizer and defoaming agent, thickeners were added respectively, and the pourability and thermal stability (degree of stratification) of the samples were observed. The results are shown in Table 15.

[0120] Table 15 Thickener screening test results

[0121]

[0122] Combined with the above experiments, by adding different thickeners and heat storing at 54±2℃ for 14 days, the water precipitation degree and pourability of each sample were measured. The appropriate ratio of xanthan gum and magnesium aluminum silicate can effectively improve the heat storage stability of the preparation and have good fluidity. The use of xanthan gum combined with magnesium aluminum silicate is preferred.

[0123] Experimental Example 7 Screening of preservatives

[0124] This experimental example screens the preservatives in the indole ester suspension, and the preservative screening experiment is carried out according to Table 16.

[0125] Table 16 Screening experiment of preservatives

[0126]

[0127] Based on the screening of antifreeze, wetting and dispersing agent, stabilizer, defoaming agent and thickener, preservatives were added respectively and the antiseptic effect of the samples was observed. The results are shown in Table 17.

[0128] Table 17 Screening test results of preservatives

[0129]

[0130] Combined with the above experiments, by adding different preservatives and storing at room temperature for 6 months, the preservative effect was observed. Preservatives can effectively improve the stability of the preparation and inhibit the production of microorganisms. Considering that Kason is easy to use and cost-effective as a liquid, Kason with better cost-effectiveness is preferred.

[0131] Experimental Example 8 Screening of the Optimal Addition Amount of Wetting Agent and Dispersant

[0132] This experimental example screened the optimal addition amounts of wetting agents and dispersants, and the screening experiment was conducted according to Table 18. The specific results are shown in Table 19.

[0133] Table 18 Screening experiment of optimal addition amount of wetting agent and dispersant

[0134]

[0135]

[0136] Table 19 Results of screening experiments on the optimal addition amount of wetting agent and dispersant

[0137]

[0138] Combining the test results of samples from Experiments 1 to 7, and comprehensively considering the results of pourability test, sustained foaming, low temperature stability, hot storage stability, wet screening test, etc., it can be concluded that the low temperature and hot storage stability of the samples from Experiments 1 to 3 are unqualified. The experiment shows that Experiments 4 to 7 are comprehensively judged to be qualified. Combined with the foam volume index, the formula of Experiment 4 is selected as the best.

[0139] Experimental Example 9 Performance Test of the Indole Suspension Prepared in Example 3

[0140] In this experimental example, the performance of the indole ester suspension prepared in Example 3 was tested, and the specific results are shown in Table 20.

[0141] Table 20 Experimental test results of indole ester suspension prepared in Example 3

[0142]

[0143] Experimental Example 10 Application of indole ester suspension in improving fruit quality

[0144] This experimental example tests the efficacy of the indole ester suspension prepared in Example 3.

[0145] Experimental crops: Grapes (variety: black and yellow)

[0146] Experimental period: July 2024-August 2024

[0147] Experimental location: Xingyang City, Henan Province

[0148] Experimental method: Spray the whole plant with the used concentration at the beginning of grape color change, investigate the color development every 7 days, and measure the sugar content of each treatment with a sugar meter when the harvest time comes.

[0149] Experimental agents: 20% indole ester suspension, 20% indole ester emulsifiable concentrate, 30% ammonium sulfoxide and ethephon (mass concentration ratio is 3:27) aqueous solution, and a clean water blank control. The specific experimental treatments are shown in Table 21.

[0150] Table 21: Drug treatment concentrations in Experimental Example 10

[0151] serial number Pharmacy Dilution multiple Active ingredient concentration A 20% indole ester emulsifiable concentrate 1000 times 200mg / L B 20% indole ester suspension 1000 times 200mg / L C 30% amine·ethephon (3:27) aqueous solution 600 times 500mg / L D Shimizu 0 0

[0152] The coloration of grapes in each treatment group is as follows Figure 1 The sugar increase situation is shown in Table 22.

[0153] Table 22 Sugar content of grapes in each treatment group after treatment

[0154] Experimental treatment A B C D Brix 16.72 17.44 16.29 15.77

[0155] Depend on Figure 1It can be seen that the coloring effect of 20% indole ester suspension is better than that of indole ester EC. The reason may be that the EC contains organic solvents, which have a certain adverse effect on crop metabolism and fruit coloring. The control agent 30% amine·ethephon has the best coloring effect, but from the sugar content value determination in Table 22, the sugar content of the grapes in the control agent 30% amine·ethephon treatment group is not as good as that of the indole ester suspension treatment group. In summary, combined with the two indicators of coloring and sugar content, the grapes treated with indole ester suspension can reach the expected harvest index, and the sugar content is increased by 10.6% compared with the clear water control.

[0156] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An indole ester suspension, characterized in that: The indole ester suspension is mainly composed of water and the following components in percentage by mass: 5-20% indole ester, 0.5-4% wetting agent, 0.3-3% dispersant, 1-2% thickener, 0.05-0.1% stabilizer, and 4-10% antifreeze agent; the wetting agent is selected from one of sulfate anionic wetting agents, polyoxyethylene ether, and isodecyl alcohol polyoxyethylene ether; the stabilizer is selected from one of formic acid, acetic acid, citric acid, aminosulfonic acid, sorbitol, and sodium tripolyphosphate; the pH of the indole ester suspension is 4-7.

2. The indole ester suspension according to claim 1, wherein: The dispersant is selected from one of lignin sulfonate, polynaphthaldehyde sulfonate, polycarboxylate and alkylnaphthalene sulfonate.

3. The indole ester suspension according to claim 1, wherein: The thickeners are xanthan gum and magnesium aluminum silicate; the mass ratio of the xanthan gum to magnesium aluminum silicate is (0.2-1): (0.8-1).

4. The indole ester suspension according to claim 1, wherein: The antifreeze agent is selected from one of ethylene glycol, propylene glycol or glycerol.

5. according to any one of claims 1 to 4, characterized in that: The indole ester suspension is mainly composed of water and the following components in percentage by mass: 5-20% indole ester, 2-4% wetting agent, 2-3% dispersant, 1-2% thickener, 0.05-0.1% stabilizer, and 4-10% antifreeze agent; the wetting agent is polyoxyethylene ether; the dispersant is one of polynaphthaldehyde sulfonate or polycarboxylate; and the pH of the indole ester suspension is 4-7.

6. The indole ester suspension according to claim 5, wherein: The indole ester suspension comprises one or two of a defoamer and a preservative; the defoamer is selected from one of organic siloxane, silicone or tributyl phosphate; the mass percentage of the defoamer in the indole ester suspension is 0.05-0.1%; the preservative is selected from one or two of kason and sodium benzoate.

7. A method for preparing the indole ester suspension according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: mixing indole ester, a wetting agent, a dispersant, a stabilizer, a thickener, an antifreeze agent and other additives uniformly, and grinding the mixture to obtain the obtained product; the particle size D of the material obtained after grinding is 90 ≤5μm.

8. An application of the indole ester suspension according to any one of claims 1 to 6 in improving the quality of fruits, characterized in that: The improving of fruit quality is to increase the sweetness of the fruit and / or promote the coloring of the fruit.

9. The use of the indole ester suspension according to claim 8 in improving the quality of fruits, characterized in that: The fruit is grapes.

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