Application of ethychlozate in lettuce leaf shaping and medicament for lettuce leaf shaping

Abstract

The invention relates to application of ethychlozate in lettuce leaf shaping and a medicament for lettuce leaf shaping, and belongs to the technical field of plant growth regulation and control. Field pesticide effect experiments show that the ethychlozate can remarkably increase the width, the number and the dip angle of lettuce leaves and adjust the plant type of lettuce plants. Meanwhile, the width of the lettuce leaves is increased, the direction of the lettuce leaves is changed, the inclination angle of the leaves is increased, the actual receiving area of photosynthesis leaves is increased, and the method has positive significance in increasing the yield. In addition, the ethychlozate can also improve the content of chlorophyll in the lettuce leaves, and is beneficial to improving the quality of the lettuce. Furthermore, after the ethychlozate is compounded with one or two of known plant growth regulators such as mepiquat chloride, chlormequat chloride, ethephon and prohexadione calcium, the leaf growth angle of the lettuce can be effectively regulated, the plant type can be tidied, and the quality of the lettuce can be improved.

Description

Technical Field

[0001] The invention relates to application of indole ester in shaping lettuce leaves and a medicament for shaping lettuce leaves, belonging to the technical field of plant growth regulation. Background Art

[0002] Lettuce belongs to the Compositae Lactucae, and is an annual or biennial vegetable of the Compositae family. It is named because it is mainly eaten raw. It is rich in dietary fiber and trace elements such as calcium, iron, and zinc. It is widely planted and is a common green vegetable on the table.

[0003] Common lettuces are divided into three types: head lettuce, curly lettuce and upright lettuce. Lettuce heart-turning is often used on semi-head and upright lettuces. This type of lettuce has a large planting area and a short growth cycle, generally about 30 days. The main growth habit is that the heart leaves are slightly inward, the leaves are wrinkled, easy to poke, there are more than 30 leaves, weighing 200-300g, with a spread of 20cm, and a compact plant shape. Because there are many leaves, the leaves are easily twisted and the heart is strung together due to poor light in continuous rainy weather. However, high-quality lettuce requires a complete, stretched and upright appearance, and dark green and shiny leaves. Due to such market orientation, farmers tend to grow lettuces with green and shiny leaves, and the leaves are spread out, not twisted, and not strung together. Therefore, in addition to conventional fertilizer and water and plant protection management during lettuce planting, lettuce heart-turning is also required.

[0004] At present, the methods of shaping lettuce are generally divided into manual mechanical leaf stripping or using chemicals. Among them, manual shaping is laborious, easy to break the leaves, and easy to rebound, so the use of chemicals has gradually become the main shaping method adopted by lettuce farmers. However, the shaping chemicals on the market are uneven, and the number of times they are used is shocking. The high frequency of use will inevitably lead to serious excessive pesticide residues, and improper use can easily damage the leaves and cause pesticide damage. Therefore, it is an urgent problem to develop a shaping agent that can promote the shaping of lettuce leaf stripping, change the growth form of lettuce leaves, reduce pesticide damage, and improve the commercial quality of lettuce.

[0005] Ethychlozate, chemical name: 5-chloro-1H-indazole-3-acetic acid ethyl ester, CAS number 27512-72-7, its pure product is white to yellow crystals, insoluble in water, soluble in acetone, methanol, ethanol, isopropanol, ethyl acetate, etc. The physiological characteristics of ethoxylated esters are manifested in controlling plant vegetative growth and promoting the transformation of plant vegetative growth to reproductive growth. At present, ethoxylated esters are mainly used in thinning flowers and fruits of fruit trees, quality improvement and early maturity of melon and fruit economic crops, especially in thinning fruits, promoting fruit ripening, improving fruit quality and reducing floating skin in citrus. At present, there are reports on the application of ethoxylated esters in China, such as sweetening watermelon, thinning mango to increase single fruit weight, thinning grapes to improve quality, reducing acidity and sweetening loquat, etc., but there are few studies on its application in other aspects of crops. Summary of the invention

[0006] The first purpose of the present invention is to provide the application of indole ester in the shaping of lettuce leaves, so as to provide a safe and effective drug resource for the existing lettuce heart shaping technology.

[0007] The second purpose of the present invention is to provide a medicine for shaping lettuce leaves, which provides a medicine for the prior art that is safe and convenient to use, can effectively adjust the growth angle of lettuce leaves, and improve the quality of lettuce.

[0008] In order to achieve the above object, the technical scheme of the application of indole ester in the shaping of lettuce leaves in the present invention is:

[0009] Application of indole esters in shaping lettuce leaves.

[0010] The beneficial effect of the above technical scheme is that the application of indole ester in the shaping of lettuce leaves belongs to the invention of new use of known products. The present invention has found through experiments that indole ester can effectively adjust the growth angle of lettuce leaves, adjust the plant shape, and improve the quality of lettuce. The present invention provides a new available drug for the shaping of lettuce leaves, and further expands the application scope of indole ester, which has positive significance for greatly reducing the investment in manual leaf turning, improving the commerciality of leafy vegetables, and increasing the economic value of growing lettuce. At the same time, indole ester is very easy to metabolize in the plant body, has low residue, is green and efficient, and no obvious drug damage occurs in the observation of drug damage in field efficacy experiments, and it is used once during the entire growth period of lettuce, which is safe for crops.

[0011] As a further improvement, the blade shaping includes blade centering shaping.

[0012] As a further improvement, the blade centering shaping includes increasing the blade inclination angle.

[0013] As a further improvement, the blade shaping includes increasing the width and number of the blades.

[0014] The beneficial effect of the above technical solution is that: the present invention has found through field efficacy experiments that indole ester can significantly increase the width, number and inclination of lettuce leaves, thereby adjusting the plant type of lettuce plants. At the same time, increasing the width of lettuce leaves, changing the orientation of lettuce leaves, and increasing the inclination of leaves are helpful to increase the actual receiving area of ​​photosynthesis leaves, which is also of positive significance to the increase in yield. Moreover, indole ester can also increase the content of chlorophyll in lettuce leaves, which is helpful to improve the quality of lettuce.

[0015] In order to achieve the above object, the technical scheme of a medicament for shaping lettuce leaves in the present invention is:

[0016] A medicine for shaping lettuce leaves, comprising indole ester or indole ester and active substances; the active substances are selected from one of mepiquat, chlormequat chloride, ethephon and prohexadione-calcium.

[0017] The beneficial effect of the above technical solution is that: the present invention finds through field efficacy experiments that after the indole ester and the growth regulator component are compounded into a medicament, it can promote the shaping of lettuce leaves, change the growth form of lettuce leaves, reduce pesticide damage, improve the commercial quality of lettuce, and reduce labor costs, thereby achieving the purpose of increasing production and income. At the same time, the medicament of the present invention is applied less times and is convenient to use. Only one liquid surface spray is required on the lettuce to obtain a good effect, and the leaf damage caused by improper application of the medicament can be effectively reduced.

[0018] As a further improvement, when the active substance contains mepiquat, the mass ratio of indole ester to mepiquat is 1:40-2:1;

[0019] When the active substance contains chlormequat, the mass ratio of indole ester to chlormequat is 1:10-1:1;

[0020] When the active substance contains ethephon, the mass ratio of indole ester to ethephon is 1:10-1:1;

[0021] When the active substance contains prohexadione calcium, the mass ratio of indole ester to prohexadione calcium is 1:40-2:1.

[0022] As a further improvement, when the active substance contains mepiquat, the mass ratio of indole ester to mepiquat is 1:(2-5);

[0023] When the active substance contains chlormequat chloride, the mass ratio of indole ester to chlormequat chloride is 1:(3-5);

[0024] When the active substance contains ethephon, the mass ratio of indole ester to ethephon is 1:(2-2.5);

[0025] When the active substance contains calcium prohexadione, the mass ratio of indole ester to calcium prohexadione is (5-7):(13-25).

[0026] As a further improvement, the dosage form of the medicament includes soluble solution, powder, suspension, and emulsifiable concentrate.

[0027] Specifically, the medicament of the present invention can be added with auxiliary agents and dispersion media commonly used in the art to prepare different dosage forms, which can be selected from one or more of dispersants, wetting agents, penetrants, thickeners, stabilizers, and antifreeze agents.

[0028] Specifically, wetting and dispersing agents include Tween series (polyoxyethylene sorbitan fatty acid esters), OP series (alkylphenol ethylene oxide condensates), calcium dodecylbenzene sulfonate, penetrant JFC, dispersing and wetting agents fatty alcohol polyoxyethylene ether and sulfate anion compounds, polyethylene glycol series, sodium dodecyl sulfate, lignin sulfonates, polycarboxylates, phosphates, naphthalene sulfonate additives, etc.; antifreeze agents include ethylene glycol, propylene glycol, glycerol, etc.; thickeners include xanthan gum, guar gum, polyacrylamide, carboxymethyl cellulose, etc.; the dispersion medium can be solid or liquid, the solid can be kaolin, white carbon black, bentonite, calcium carbonate, etc., and the liquid can be water, solvent oil, ethanol, methanol, DMF, etc.

[0029] As a further improvement, when the agent is used, the concentration of indole ester is 10-100 mg / L. DETAILED DESCRIPTION

[0030] In the prior art, the use of medicaments for shaping has gradually become the main shaping method adopted by lettuce planting farmers. However, the shaping agents on the market are uneven, and the number of times they are used is shocking. The high frequency of use will inevitably lead to serious excessive pesticide residues, and improper use will easily damage the leaves and cause pesticide damage. Based on this, the present invention provides the application of indole ester in the shaping of lettuce leaves, which provides a safe and effective drug resource for the prior art lettuce turning and shaping. The present invention finds through field efficacy experiments that indole ester can significantly increase the width, number and inclination of lettuce leaves, thereby adjusting the plant type of lettuce plants. At the same time, increasing the width of lettuce leaves, changing the leaf orientation of lettuce, and increasing the leaf inclination are helpful to increase the actual receiving area of ​​photosynthesis leaves, which is also of positive significance to the increase in yield. Moreover, indole ester can also increase the content of chlorophyll in lettuce leaves, which is helpful to improve the quality of lettuce.

[0031] Furthermore, the present invention also provides an agent for shaping lettuce leaves, the agent comprising indole ester or indole ester and an active substance; the active substance is selected from one of mepiquat, chlormequat chloride, ethephon, and prohexadione-calcium.

[0032] When the active substance contains mepiquat, the mass ratio of indole ester to mepiquat is 1:40-2:1;

[0033] When the active substance contains chlormequat, the mass ratio of indole ester to chlormequat is 1:10-1:1;

[0034] When the active substance contains ethephon, the mass ratio of indole ester to ethephon is 1:10-1:1;

[0035] When the active substance contains prohexadione calcium, the mass ratio of indole ester to prohexadione calcium is 1:40-2:1.

[0036] The present invention has found through field efficacy experiments that after the indole ester and the growth regulator component are compounded into a medicament, the medicament can promote the shaping of lettuce leaves, change the growth form of lettuce leaves, reduce medicament damage, improve the commercial quality of lettuce, and reduce labor costs, thereby achieving the purpose of increasing production and income. At the same time, the medicament of the present invention is applied less times and is convenient to use. Only one liquid surface spray is required on the lettuce to obtain a good effect, and the leaf damage caused by improper medicament application can be effectively reduced.

[0037] 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.

[0038] A specific embodiment of a medicament for shaping lettuce leaves of the present invention:

[0039] Example 1

[0040] The dosage form of the agent for shaping lettuce leaves in this embodiment is an emulsifiable concentrate, which is composed of the following components in percentage by mass: 15% indole ester, 5% calcium dodecylbenzenesulfonate, 2% fatty alcohol polyoxyethylene ether O-4, 20% ethanol, and the balance solvent oil.

[0041] Example 2

[0042] The dosage form of the agent for shaping lettuce leaves in this embodiment is a soluble liquid, which is composed of the following components in percentage by mass: 5% indole ester, 25% mepiquat, 5% Tween-80, 3% polyethylene glycol 600, 30% ethanol, and the balance water.

[0043] Example 3

[0044] The formulation of the agent for shaping lettuce leaves in the present embodiment is a wettable powder, which is composed of the following components in percentage by mass: 7.5% indole ester, 37.5% chlormequat, 5% sodium lignin sulfonate (Borresperse NA), 63% polycarboxylate T3, 30% white carbon black, and kaolin to make up the balance.

[0045] Example 4

[0046] The agent for shaping lettuce leaves of the present embodiment is in the form of a soluble solution, and is composed of the following components in percentage by mass: 10% indole ester, 25% ethephon, 5% OP-10, 3% polyethylene glycol 600, 30% ethanol, and the balance made up of water.

[0047] Example 5

[0048] The dosage form of the agent for shaping lettuce leaves in this embodiment is a suspension, which is composed of the following components in percentage by mass: 5% of indole ester, 25% of prohexadione calcium, 3% of polycarboxylate T36, 3% of naphthalenesulfonate (Morwet D-425), 0.5% of xanthan gum 9280, 3% of ethylene glycol, and the balance is made up of water.

[0049] Example 6

[0050] The dosage form of the agent for shaping lettuce leaves in this embodiment is a soluble liquid, which is composed of the following components in percentage by mass: 2.5% indole ester, 5% mepiquat, 5% Tween-80, 3% polyethylene glycol 600, 30% ethanol, and the balance water.

[0051] Example 7

[0052] The formulation of the agent for shaping lettuce leaves in this embodiment is a wettable powder, which is composed of the following components in percentage by mass: 5% indole ester, 15% chlormequat, 5% calcium lignin sulfonate (Borresperse CA), 3% polycarboxylate T36, 30% white carbon black, and kaolin to make up the balance.

[0053] Example 8

[0054] The dosage form of the agent for shaping lettuce leaves in this embodiment is a soluble solution, which is composed of the following components in percentage by mass: 10% indole ester, 20% ethephon, 5% OP-10, 3% polyethylene glycol 600, 30% ethanol, and water to make up the balance.

[0055] Example 9

[0056] The dosage form of the agent for shaping lettuce leaves in this embodiment is a suspension, which is composed of the following components in percentage by mass: 7% indole ester, 13% prohexadione calcium, 3% polycarboxylate T36, 3% naphthalenesulfonate (Morwet D-425), 0.5% xanthan gum 9280, 3% ethylene glycol, and the balance is made up of water.

[0057] In the above embodiments, according to the preparation of soluble agent, the solvent is added to the reactor, the measured materials are put into the reactor in turn, and other raw materials are added after pre-stirring and dissolving, and a homogeneous transparent solution is formed after stirring for a certain period of time. According to the preparation of powder, after each material is measured, it is put into a conical mixing kettle and stirred and mixed evenly, and then passed through a jet mill and crushed to a fineness of more than 450 meshes. According to the preparation of suspension, water and materials are measured and added to a shearing machine, and after uniform shearing, it is pumped into a sand mill and ground for 2-3 hours to form a uniform suspension.

[0058] Experimental Example 1 Application of indole ester in shaping lettuce leaves

[0059] This experimental example verifies the efficacy of the agents of Examples 1 to 9 in the field, and the specific process is as follows:

[0060] Trial time: July 8, 2022 - July 25, 2022.

[0061] Experimental crops: lettuce.

[0062] Experimental location: Songming County, Yunnan.

[0063] Target of prevention and control: Adjust the growth direction of lettuce leaves.

[0064] Test agents: The agents prepared according to Examples 1 to 9 were all prepared by the laboratory of Zhengzhou Zhengshi Chemical Products Co., Ltd.; the comparative products were purchased from the market, and the control agent humic acid macroelement fertilizer was purchased by farmers themselves, and a blank water control was set up.

[0065] Test method: Apply pesticides on July 8 (using foliar spray, lettuce is a fast-growing period), Examples 1 to 9 and Comparative Examples 1 to 4 are applied once during the entire growth period, and the farmer's self-defense agent is applied twice on July 15. Each plot has an area of ​​12 square meters, and is repeated 4 times. At the same time, the index data on the day of application of pesticides are investigated, and the presence of pesticide damage is investigated 3 days later. At the same time, the number of leaves, leaf width, leaf inclination angle, and chlorophyll SPAD are investigated. Subsequently, the number of leaves, leaf width, leaf inclination angle, and chlorophyll SPAD values ​​are investigated at intervals of 7 days on July 18 and July 25, respectively. The growth of a single plant (single plant weight) was investigated for the last time. According to the 5-point sampling method, 25 lettuce seedlings were randomly selected from each plot.

[0066] Carry out normal water and fertilizer management and pest and disease control during the application period.

[0067] Methodology:

[0068] Leaf inclination: the angle between the leaf blade and the stem;

[0069] Leaf width: the widest part of the plant leaf;

[0070] Number of leaves: only the number of fully expanded leaves of the whole plant was counted;

[0071] Chlorophyll content was measured using a handheld SPAD instrument.

[0072] The treatments with different drugs are shown in Table 1.

[0073] Table 1 Experimental design and arrangement

[0074]

[0075] Note: EC, SL, WP, SC and WDG represent different dosage forms, among which EC stands for emulsifiable concentrate, SL stands for soluble concentrate, WP stands for wettable powder, SC stands for suspension concentrate and WDG stands for water dispersible granules.

[0076] 1) Effects of different treatment groups on lettuce leaf width

[0077] The effects of different treatment groups on the width of lettuce leaves are shown in Table 2. From the data in Table 2, it can be seen that for the agents of Examples 1-9, the width of the leaves of lettuce increased 3 days after the application of the agent compared with the blank control and the control, and the increase in Example 7 was the most significant, while the differences in the other treatments were not significant; 10 days after the application, the width of the lettuce leaves increased significantly compared with the blank control, the control treatment, and the farmer's self-protection treatment, and the difference was significant; 17 days after the application, the leaf width of the agent treatment groups of Examples 1-1, 1-2, and 2-9 was significantly higher than that of the blank control and the farmer's self-protection agent, and the leaf width was also significantly increased compared with the control treatment; the leaf width of the high concentration of indole ester 100 mg / L treatment was not significantly increased compared with that of Example 2-9, but was significantly different from the blank control.

[0078] Table 2 Effects of different treatments on lettuce leaf width

[0079]

[0080] Note: Lowercase letters indicate significant differences (P<0.05)

[0081] (2) Effects of different treatment groups on the inclination angle of lettuce leaves

[0082] The effects of different treatment groups on the inclination angle of lettuce leaves are shown in Table 3. From the data in Table 3, it can be seen that for the agents of Examples 1-9, there is no significant difference in the inclination angle of the lettuce leaves compared with the blank control and the control group 3 days after the application of the agent. As time goes by, the inclination angle of the leaves gradually increases. Ten days after the application of the agent, the inclination angle of the lettuce leaves in the treatment group of Examples 1-9 increases compared with the control group, the farmer's self-defense treatment and the blank control treatment, and the difference is significant. Seventeen days after the application of the agent, the amplitude of the expansion of the leaf angle of the treatment of Examples 1-1 and 1-2 decreases, and there is no significant difference from the control groups 1, 2, 3, and 4. The duration of the efficacy of the treatment with indole ester alone is lower than that of the mixed agent treatment.

[0083] This indicates that the use of the agent prepared according to the present invention can significantly change the leaf orientation of lettuce, increase the leaf inclination angle, and simultaneously increase the actual receiving area of ​​the photosynthetic leaves, which is also of positive significance to the increase in yield.

[0084] Table 3 Effects of different treatments on the inclination angle of lettuce leaves

[0085]

[0086] Note: Lowercase letters indicate significant differences (P<0.05)

[0087] (3) Effects of different treatment groups on the number of lettuce leaves

[0088] The effects of different treatment groups on the number of lettuce leaves are shown in Table 4. From the data in Table 4, it can be seen that in the treatment groups of Examples 3, 7 and 8, the number of lettuce leaves increased and the difference was significant compared with the blank control 3 days after the drug was applied, and the differences in the treatments of other examples were not significant. As time goes by, the number of leaves also increases. Ten days after the drug was applied, the number of leaves in the treatment groups of Examples 1-9 increased and the difference was significant compared with the blank control and the comparative example. 17 days after the drug was applied, the number of leaves treated with the agent prepared in the example increased and the difference was still significant compared with the blank control and the comparative example. Among them, the treatments of Examples 1-2, 3, 5, 6, 8 and 9 were significantly higher than the farmers' self-defense agent. It shows that the number of lettuce leaves can be increased overall after spraying the agent prepared by the present invention.

[0089] Table 4 Effects of different treatments on the number of lettuce leaves

[0090]

[0091] Note: Lowercase letters indicate significant differences (P<0.05)

[0092] (4) Effects of different treatment groups on lettuce chlorophyll (SPAD)

[0093] The effects of different treatment groups on the chlorophyll (SPAD) of lettuce are shown in Table 5. From the data in Table 5, it can be seen that after the application of the agents of Examples 1-9, the chlorophyll content of lettuce is promoted compared with the blank control, and at the same time, the SPAD value of the mixed agent is 1-3 higher than that of the single agent of indole ester at a certain concentration. It shows that the application of the agent of the present invention can significantly increase the chlorophyll content of lettuce and improve the quality of lettuce.

[0094] Table 5 Effects of different treatments on lettuce chlorophyll (SPAD)

[0095]

[0096] Note: Lowercase letters indicate significant differences (P<0.05)

[0097] (5) Effects of different treatment groups on lettuce biomass

[0098] The effects of different treatment groups on the biomass of lettuce are shown in Table 6. It can be seen from the data in Table 6 that after the lettuce was sprayed with the agent of the present invention, 17 days after the drug was applied, the average biomass increased compared with the blank control, the comparative agent and the farmer's self-defense agent, and the difference was significant. Among them, the biomass of the dish treated in Example 5 reached 163g, with the largest increase; followed by Examples 7, 6, 3, 2, 9 and 1-2, with an increase in weight of 37-50 grams per plant. The single-dose high-concentration treatment of indole ester 1-3 had a significant difference in weight from the blank control, but the increase was not significantly different from that of Comparative Examples 1, 2, 3, and 4. And the mixed formulation Examples 2 to 9 were superior to the single-dose indole ester treatment in terms of weight, among which the single-dose indole ester treatments of Examples 3, 5, 6 and 7 had a significant increase in weight compared with the single-dose indole ester treatment, with significant differences. This shows that using the agent of the present invention once can promote the growth of lettuce and increase yield.

[0099] Table 6 Effects of different treatments on lettuce biomass (average biomass per plant)

[0100]

[0101] Note: Lowercase letters indicate significant differences (P<0.05)

[0102] (6) Medication safety

[0103] From the safety perspective, no obvious pesticide damage occurred during this experiment, and it was used once throughout the entire growing period of lettuce, which is safe for crops and can fill the gap in pesticide use in the market.

[0104] The above test results show that the use of the agent of the present invention can significantly change the angle of the lettuce leaves, stretch the leaves, increase the effective photosynthetic area of ​​the leaves, increase the chlorophyll content of the lettuce, and form a plant shape with spread leaves and no twisting. At the same time, the yield of lettuce is increased, the quality and commerciality of lettuce are improved, the production cost is reduced, and huge economic value and social value can be created.

[0105] The above test results show that indole ester and various mixed agents can effectively increase the angle of lettuce leaves and have a yield-increasing effect. However, the duration of the high-concentration treatment of indole ester alone in changing the plant type and increasing the angle of leaves is lower than that of the mixed agent treatment. In terms of yield, low-concentration and high-concentration single agents significantly increased yield compared with the blank control, but the increase in yield was slightly lower than that of the mixed agent.

[0106] By mixing indomethacin with other agents, indomethacin can reduce the amount of indomethacin used to a certain extent, thereby reducing costs (currently indomethacin has limited manufacturers and high prices). Mixing can also reduce the amount of other single agents used. At the same time, mixing can increase the chlorophyll content of lettuce, thicken the leaves, increase yield, improve the commercial quality of lettuce, and increase the purchase price of lettuce.

[0107] 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 description of the present invention should also be included in the protection scope of the present invention.

Claims

1. Application of indole ester in shaping lettuce leaves.

2. The use of indole ester according to claim 1 in shaping lettuce leaves, characterized in that: The blade shaping includes blade centering shaping.

3. The use of indole ester in the shaping of lettuce leaves according to claim 2, characterized in that: The blade centering shaping includes increasing the blade inclination angle.

4. The use of indole ester in the shaping of lettuce leaves according to claim 1, characterized in that: The blade shaping includes increasing the width and number of the blades.

5. A medicament for shaping lettuce leaves, characterized in that: The medicament comprises indole ester or indole ester and active substance; the active substance is selected from one of mepiquat, chlormequat chloride, ethephon and prohexadione-calcium.

6. The agent for shaping lettuce leaves according to claim 5, characterized in that: When the active substance contains mepiquat, the mass ratio of indole ester to mepiquat is 1:40-2:1; When the active substance contains chlormequat, the mass ratio of indole ester to chlormequat is 1:10-1:1; When the active substance contains ethephon, the mass ratio of indole ester to ethephon is 1:10-1:1; When the active substance contains prohexadione calcium, the mass ratio of indole ester to prohexadione calcium is 1:40-2:

1.

7. The agent for shaping lettuce leaves according to claim 6, characterized in that: When the active substance contains mepiquat, the mass ratio of indole ester to mepiquat is 1:(2-5); When the active substance contains chlormequat, the mass ratio of indole ester to chlormequat is 1:(3-5); When the active substance contains ethephon, the mass ratio of indole ester to ethephon is 1:(2-2.5); When the active substance contains calcium prohexadione, the mass ratio of indole ester to calcium prohexadione is (5-7):(13-25).

8. The agent for shaping lettuce leaves according to any one of claims 5 to 7, characterized in that: The dosage forms of the medicament include soluble solutions, powders, suspensions and emulsifiable concentrates.

9. The agent for shaping lettuce leaves according to any one of claims 5 to 7, characterized in that: When the agent is used, the concentration of indole ester is 10-100 mg / L.

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