A cotton chemical topping agent and a cotton chemical topping method

Abstract

The present application belongs to the technical field of plant growth regulators, and relates to a cotton chemical topping agent and a cotton chemical topping method. The cotton chemical topping agent comprises methopromine and uniconazole, and further comprises an anti-high-temperature component and trace elements. The mass ratio of the anti-high-temperature component and the trace elements is (0.6-3.6):1. The anti-high-temperature component is selected from salicylic acid, proline and sucrose. The trace elements are selected from borax. The cotton chemical topping agent provided by the present application takes methopromine and uniconazole as the basic cotton chemical topping agent, and adds cotton anti-high-temperature formula, bud-retention and flower-promotion formula and trace element formula. The topping agent is sprayed when cotton is topped, so that chemical topping replaces manual topping, and the resistance of cotton to high temperature is effectively improved, the shedding of buds and bolls on the top is reduced, the boll formation rate on the top is increased, the boll weight on the top is increased, and finally the yield of seed cotton is improved.

Description

Technical Field

[0001] This invention belongs to the field of plant growth regulator technology, and relates to a cotton chemical topping agent and a cotton chemical topping method. Background Technology

[0002] Cotton is an important economic crop, as well as a major oilseed crop and textile fiber raw material. Cotton has an indeterminate growth habit, and during cultivation, it is necessary to remove apical dominance in the mid-to-late stages to coordinate the relationship between vegetative and reproductive growth, promote flowering and boll formation, reduce bud and boll shedding, increase boll weight, and thus increase yield. Xinjiang is my country's largest cotton-producing region. Statistics show that in 2025, Xinjiang's cotton planting area reached 38.875 million mu (approximately 2.25 million hectares), accounting for 87.0% of the national cotton planting area; its total lint cotton output was 6.165 million tons, accounting for 92.8% of the national total. In traditional cultivation management, manual topping is used to remove apical dominance. In recent years, with rising labor costs and labor shortages, cotton planting costs have increased year by year, while cotton planting efficiency has decreased. Furthermore, manual topping is time-consuming and labor-intensive, failing to meet the needs of mechanized, simplified, and sustainable cotton production management. Therefore, promoting chemical topping technology to replace manual topping is the only way to achieve full mechanization and simplification of cotton production management in Xinjiang.

[0003] Chemical topping technology for cotton involves spraying plant growth regulators to delay or inhibit apical growth, control apical dominance, suppress internode elongation of the upper main stem, accelerate the transformation of vegetative growth to reproductive growth, and induce natural topping. Currently, the main components of chemical topping agents on the Xinjiang cotton market are mepiquat chloride, paclobutrazol, flubendiamide, chlormequat chloride, and paclobutrazol. After spraying chemical topping agents on field cotton, the top fruiting branches are short, and the entire cotton plant can form an ideal "tower-shaped" plant structure. However, this also easily causes flower and bud drop on the top few fruiting branches, reducing the boll formation rate and thus easily leading to reduced cotton yield.

[0004] Cotton treated with chemical topping has 3-4 more fruiting branches than cotton treated with manual topping. The yield of cotton treated with chemical topping is most affected by the number of bolls and the weight of the bolls at the top. Therefore, the key to maintaining and increasing the yield of cotton treated with chemical topping is to reduce the shedding of buds and bolls on the top 3-4 fruiting branches, increase the boll formation rate and the weight of the bolls, and thus increase the yield of cotton. Summary of the Invention

[0005] The main objective of this invention is to overcome the deficiencies in the prior art and provide a cotton chemical capping agent and a cotton chemical capping method.

[0006] To achieve the above objectives, the specific technical solution is as follows: This invention provides a cotton chemical capping agent, comprising mepiquat chloride and uniconazole, and further comprising a high-temperature resistant component and trace elements; the mass ratio of the high-temperature resistant component and trace elements is (0.6-3.6):1; the high-temperature resistant component is selected from salicylic acid, proline and sucrose; the trace elements are selected from borax.

[0007] The cotton chemical topping agent provided by this invention uses mepiquat chloride and uniconazole as the basic chemical topping agents for cotton, and adds a certain mass ratio of high-temperature resistant components and trace elements; while achieving stable chemical topping, it effectively improves the cotton's resistance / tolerance to high temperatures, reduces top boll shedding, increases the top boll formation rate, and increases the top boll weight, ultimately improving the yield of seed cotton.

[0008] Among them, salicylic acid, proline and sucrose are used as a high-temperature resistance formula for cotton, which can work together to reduce the damage of high temperature to cotton; borax, as a trace element fertilizer, improves pollen vitality, promotes cotton flowering and pollination, promotes flower bud differentiation and boll development, and reduces shedding.

[0009] Furthermore, the cotton chemical capping agent, by weight, comprises: 3.6-8.4 parts of mepiquat chloride, 1.2-2.8 parts of uniconazole, 0.6-1.4 parts of salicylic acid, 6-14 parts of proline, 12-28 parts of sucrose, and 12-28 parts of borax.

[0010] The components of this invention are formulated in the above-mentioned proportions, which enables each effective ingredient to fully exert its synergistic effect. On the basis of completing chemical topping and growth control, it increases the boll formation rate of top cotton plants, increases the weight of a single top boll, and achieves an overall increase in cotton seed yield.

[0011] Furthermore, the cotton chemical capping agent, by weight, also includes: 6-14 parts of potassium dihydrogen phosphate and 6-14 parts of amino acids.

[0012] The synergistic effect of potassium dihydrogen phosphate and amino acids described in this invention can better promote photosynthesis in cotton, promote nutrient absorption and distribution, enhance stress resistance, improve boll development, and further increase seed cotton yield.

[0013] Furthermore, the cotton chemical capping agent, by weight, also includes: 4.2-9.8 parts zinc sulfate, 4.2-9.8 parts manganese sulfate and 4.2-9.8 parts ferrous sulfate.

[0014] This invention uses zinc sulfate, manganese sulfate and ferrous sulfate as medium-quantity fertilizers. After foliar spraying, these fertilizers can supplement medium-quantity elements, promote bud and boll development, enhance cotton's resistance to stress, and further increase seed cotton yield.

[0015] In one specific embodiment of the present invention, the cotton chemical capping agent, by weight, comprises: 6 parts of mepiquat chloride, 2 parts of uniconazole, 1 part of salicylic acid, 10 parts of proline, 20 parts of sucrose, 20 parts of borax, 10 parts of potassium dihydrogen phosphate, 10 parts of amino acids, 7 parts of zinc sulfate, 7 parts of manganese sulfate, and 7 parts of ferrous sulfate.

[0016] Under the above-mentioned proportions of the present invention, the synergistic effect of each component is particularly obvious, further increasing cotton yield.

[0017] The present invention also provides a method for chemical topping of cotton, wherein the cotton chemical topping agent is diluted with water and sprayed on the leaves of cotton during the topping period.

[0018] Furthermore, the cotton plant has 10-12 fruiting branches; the plant height is 70-85 cm.

[0019] At this time, the growth and development of the top of the cotton plant best matches the needs for nutrient regulation and growth inhibition. This ensures that the topping agent is precisely applied to the top growth point. While controlling the excessive growth of the terminal bud and achieving the goal of eliminating the need for topping, it will not excessively inhibit the overall vegetative growth of the cotton plant, nor will it have an adverse effect on the development of buds and bolls on the lower fruiting branches. This helps to stably achieve the effect of chemical topping and coordinate the balance between vegetative and reproductive growth of the cotton plant.

[0020] Furthermore, the cotton plant height using the one-film-six-row mulch planting pattern is 70-75 cm, while the cotton plant height using the one-film-three-row mulch planting pattern is 75-85 cm.

[0021] The specific timing for chemical topping depends on the annual cotton growth process and climate change in the cotton-growing areas. In Xinjiang cotton-growing areas, the suitable time for chemical topping of cotton in southern Xinjiang is July 15-20, while the suitable time for chemical topping of cotton in northern Xinjiang is July 9-15.

[0022] Furthermore, when the spraying method is vehicle spraying, 30-70 kg of water is added to every 100 g of the sealing agent for dilution; when the spraying method is aerial spraying, 1.5-2.0 kg of water is added to every 100 g of the sealing agent for dilution.

[0023] When the spraying method is machine spraying, the amount of water added per 100g of the sealing agent should not exceed 70kg to avoid the loss of the agent and the reduction of the efficacy.

[0024] Furthermore, based on mepiquat chloride and uniconazole, the amount of mepiquat chloride used in the capping agent sprayed per acre of cotton field is 3.6-8.4g and the amount of uniconazole is 1.2-2.8g; preferably, the amount of mepiquat chloride is 4.8-7.2g and the amount of uniconazole is 1.6-2.4g.

[0025] When using the topping agent of this invention for chemical topping treatment of cotton, the above-mentioned dosage range is the safe dosage range. The actual dosage can be adjusted appropriately according to the growth and appearance of the cotton. For cotton fields with vigorous growth and high planting density, the dosage should be increased appropriately, while for cotton fields with weak growth and low density, the dosage should be decreased appropriately. Lower dosages result in relatively poor topping effect, failing to achieve the desired topping effect and thus reducing cotton yield. Higher dosages may cause excessive topping, preventing the top fruiting branches from opening, and excessive dosages may even damage the top buds and flowers, causing flower and bud drop, thereby reducing cotton yield.

[0026] Furthermore, 6-8 days before spraying the capping agent, spray 6-8 g of mepiquat chloride per acre of cotton field to slow cotton growth and make it appear older.

[0027] Mepiquat chloride is a plant growth retardant that inhibits gibberellin synthesis, shortening internodes and slowing rapid growth of stems and leaves. Applying it 6-8 days in advance can suppress excessive vegetative growth in cotton plants, preventing them from overshooting the desired topping effect. After application, cotton plants show darker leaf color, stronger stems, and slower sprouting of new branches and leaves, exhibiting a robust, mature appearance. It also inhibits the growth of ineffective branches and leaves, improves ventilation and light penetration in the field, and redirects nutrients from seedling and leaf growth to budding and boll formation, reducing boll shedding in the lower and middle parts and lowering the probability of boll rot and disease later on. It is safer than direct application of topping agents, avoiding excessive stunting of cotton plants and premature leaf aging, while increasing boll setting rate, increasing single boll weight, and improving cotton yield and quality.

[0028] Preferably, in plots where buds sprout after excessive water and fertilizer application, a second application of mepiquat chloride should be made, with a dosage of 10-15 g / mu.

[0029] Furthermore, the method also includes shaping and controlling the cotton.

[0030] By shaping and controlling the growth pattern of cotton plants, the population structure and ideal plant type can be regulated, thereby achieving a better chemical topping effect.

[0031] Specifically, from the time cotton seedlings emerge, implement full-process shaping and control: at the cotyledon stage, spray 1.0 g-2.0 g of chlormequat chloride per mu; at the 4-leaf stage, spray 0.5 g-1.5 g of chlormequat chloride per mu; at the budding stage, spray 1.5 g-2.5 g of chlormequat chloride per mu; at the peak budding stage, spray 2.0 g-3.0 g of chlormequat chloride per mu; at the initial flowering stage, spray 4.0 g-5.0 g of chlormequat chloride per mu; and at the peak flowering stage, spray 8.0-10.0 g of chlormequat chloride per mu.

[0032] Preferably, flowering-promoting and boll-protecting regulators are sprayed in combination during the initial flowering stage and the peak flowering stage of cotton.

[0033] Compared with the prior art, the present invention has the following significant advantages: The cotton chemical topping agent provided by this invention uses mepiquat chloride and uniconazole as the base agents for cotton chemical topping, and adds a cotton high-temperature resistance formula, a bud-protecting and flower-promoting formula, and a micronutrient formula. When the cotton is topping, the topping agent is sprayed to achieve chemical topping instead of manual topping, while effectively improving the cotton's resistance / tolerance to high temperatures, reducing top bud and boll shedding, increasing the top boll formation rate, and increasing the top boll weight, ultimately increasing the yield of seed cotton. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] Unless otherwise specified in the embodiments of the present invention, the techniques or conditions described in the literature in this field or the product instructions shall be followed; if the manufacturers of the reagents or instruments used are not specified, they are all conventional products that can be purchased through legitimate channels.

[0036] The embodiments and comparative examples of this invention were conducted in cotton fields of the 130th Regiment of the 7th Division of Xinjiang Production and Construction Corps, located in the cotton-growing area of ​​northern Xinjiang. Sowing was carried out on April 20, chemical topping agent was sprayed on July 10 (cotton fruiting branches 10-12; cotton plant height about 75 cm), defoliant and ripening agent was sprayed on September 5, and seed cotton yield was measured by hand-picking on October 5.

[0037] To regulate cotton population structure and plant type and effectively achieve topping effect, this invention implements full-process shaping and control from the time cotton seedlings emerge. The specific method is as follows: (1) During the cotton cotyledon stage, after emergence, the cotyledons are flat, thick, and slightly drooping, with thicker cotyledon nodes and a plant height of about 5 cm. Spray 1.5 g of chlormequat chloride per mu. (2) When the cotton plant has 4 leaves, the 4 leaves are horizontal and the plant width is greater than the plant height. The cotton plant is short and stout, with a plant height of about 15 cm and a daily growth of about 0.5 cm for the main stem. Spray 1.0 g of chlormequat chloride per mu.

[0038] (3) When cotton buds appear, the main stem has 6-8 leaves, the cotton plant is narrow at the top and bottom and wide in the middle, the leaves are bright green, the top is spread out, the plant height is about 25 cm, the daily growth of the main stem is 1.2 cm-1.5 cm, and 2.0 g of chlormequat chloride is sprayed per mu.

[0039] (4) During the peak budding stage of cotton, the main stem has 9-11 leaves, dark green in color, plant height of about 50 cm, daily growth of the main stem of 1.5-2.0 cm, internode length of the main stem of about 5 cm, large and strong buds, 4-5 fruit branches, and spray 2.5 g of chlormequat chloride per mu.

[0040] (5) When cotton plants are about 80 cm tall at the initial flowering stage, the main stem has 15-17 leaves, the daily growth of the main stem is 1.8 cm-2.2 cm, there are 8-10 fruiting branches, the leaves are of moderate size and slightly dark in color, and the growing point is spread out. Spray 4.5 g of chlormequat chloride per mu. During the initial flowering stage of cotton, spray flowering and boll-protecting regulators in conjunction with the application of these regulators.

[0041] (6) When cotton plants are in full bloom, the plant height is 80-90 cm, the leaves are of moderate size and not thick, the leaf color begins to fade, the red stem ratio is about 70%, and the rows are close to closing. Spray 9.0 g of chlormequat chloride per mu. During the full bloom period of cotton, spray flowering and boll-protecting regulators in conjunction with the application of these regulators.

[0042] In the embodiments and comparative examples of this invention, 7 days before spraying the capping agent, 7g of mepiquat chloride was sprayed per acre of cotton field, which slowed down the growth of cotton and made it appear old.

[0043] Example 1 This embodiment provides a cotton chemical capping agent and a cotton chemical capping method, wherein, by weight, the cotton chemical capping agent comprises: 6 parts of mepiquat chloride, 2 parts of uniconazole, 1 part of salicylic acid, 10 parts of proline, 20 parts of sucrose, and 20 parts of borax.

[0044] The method for chemical topping of cotton is as follows: 59g of the above-mentioned chemical topping agent is diluted with 40kg of water and sprayed onto the cotton leaves using a machine sprayer during the topping period. The dosage of the cotton chemical capping agent sprayed is 59 g / mu, namely 6 g / mu of mepiquat chloride + 2 g / mu of uniconazole + 1 g / mu of salicylic acid + 10 g / mu of proline + 20 g / mu of sucrose + 20 g / mu of borax.

[0045] Example 2 This embodiment provides a cotton chemical capping agent and a cotton chemical capping method, wherein, by weight, the cotton chemical capping agent comprises: 6 parts of mepiquat chloride, 2 parts of uniconazole, 1 part of salicylic acid, 10 parts of proline, 20 parts of sucrose, 20 parts of borax, 10 parts of potassium dihydrogen phosphate, 10 parts of amino acids, 7 parts of zinc sulfate, 7 parts of manganese sulfate, and 7 parts of ferrous sulfate.

[0046] The method for chemical topping of cotton is as follows: dilute 100g of the above-mentioned chemical topping agent with 40kg of water, and spray it on the cotton leaves using a machine sprayer during the topping period. The dosage of the cotton chemical topping agent sprayed is 100 g / mu, namely, 6 g / mu of mepiquat chloride + 2 g / mu of uniconazole + 10 g / mu of potassium dihydrogen phosphate + 10 g / mu of amino acids + 1 g / mu of salicylic acid + 10 g / mu of proline + 20 g / mu of sucrose + 20 g / mu of borax + 7 g / mu of zinc sulfate + 7 g / mu of manganese sulfate + 7 g / mu of ferrous sulfate.

[0047] Example 3 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 70g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 70g / mu.

[0048] Example 4 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 80g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 80g / mu.

[0049] Example 5 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 90g is diluted with 40kg of water; the amount of the cotton chemical topping agent used for spraying is 90g / mu.

[0050] Example 6 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 110g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 110g / mu.

[0051] Example 7 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 120g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 120g / mu.

[0052] Comparative Example 1 This comparative example provides a cotton chemical capping agent and a cotton chemical capping method, wherein, by weight, the cotton chemical capping agent comprises: 6 parts of mepiquat chloride and 2 parts of uniconazole.

[0053] The method for chemical topping of cotton is as follows: 8g of the above-mentioned chemical topping agent is diluted with 40kg of water and sprayed on the cotton leaves using a machine sprayer during the topping period. The dosage of the cotton chemical capping agent sprayed is 8 g / mu, that is, 6 g / mu of mepiquat chloride + 2 g / mu of uniconazole.

[0054] Comparative Example 2 This comparative example provides a cotton chemical capping agent and a cotton chemical capping method, wherein, by weight, the cotton chemical capping agent comprises: 6 parts of mepiquat chloride, 2 parts of uniconazole, 10 parts of potassium dihydrogen phosphate, and 10 parts of amino acids.

[0055] The method for chemical topping of cotton is as follows: 28g of the above-mentioned chemical topping agent is diluted with 40kg of water and sprayed on the cotton leaves using a machine sprayer during the topping period. The dosage of the cotton chemical capping agent sprayed is 28g / mu, which is 6 g / mu of mepiquat chloride + 2 g / mu of uniconazole + 10 g / mu of potassium dihydrogen phosphate + 10 g / mu of amino acids.

[0056] Comparative Example 3 This comparative example provides a cotton chemical capping agent and a cotton chemical capping method, wherein, by weight, the cotton chemical capping agent comprises: 6 parts of mepiquat chloride, 2 parts of uniconazole, 7 parts of zinc sulfate, 7 parts of manganese sulfate and 7 parts of ferrous sulfate.

[0057] The method for chemical topping of cotton is as follows: 29g of the above-mentioned chemical topping agent is diluted with 40kg of water and sprayed onto the cotton leaves using a machine sprayer during the topping period. The dosage of the cotton chemical capping agent sprayed is 29 g / mu, namely 6 g / mu of mepiquat chloride + 2 g / mu of uniconazole + 7 g / mu of zinc sulfate + 7 g / mu of manganese sulfate + 7 g / mu of ferrous sulfate.

[0058] Comparative Example 4 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 40g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 40g / mu.

[0059] Comparative Example 5 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 60g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 60g / mu.

[0060] Comparative Example 6 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 130g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 130g / mu.

[0061] Comparative Example 7 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 140g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 140g / mu.

[0062] Comparative Example 8 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 160g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 160g / mu.

[0063] Comparative Example 9 The cotton chemical topping agent and method provided in this embodiment are the same as those in Embodiment 2, except that 180g is diluted with 40kg of water; the amount of the cotton chemical topping agent to be sprayed is 180g / mu.

[0064] Comparative Example 10 This comparative example involves manual topping. Five days before spraying the chemical topping agent, the top leaf and bud of the cotton plant were removed manually.

[0065] Comparative Example 11 The cotton chemical topping agent used in this comparative example was a commercially available chemical topping agent: 25% mepiquat chloride aqueous solution, with a dosage of 60 g / mu, equivalent to spraying pure mepiquat chloride at a dosage of 15 g / mu.

[0066] Comparative Example 12 This comparative example is a blank example, meaning that no pesticides were sprayed, only water was sprayed.

[0067] The seed cotton yields produced from cotton treated with the capping agents of Examples 1-2, Comparative Examples 1-3, and Comparative Examples 10-12 are shown in Table 1.

[0068] Table 1. Seed cotton yield of different formulation examples (unit: kg / mu)

[0069] As shown in Table 1, the seed cotton yields of Examples 1, 2, Comparative Examples 1-3, 9, and 10 were all higher than that of Comparative Example 12, indicating that topping treatment (including manual topping and chemical topping) can increase cotton yield. The seed cotton yields of Examples 1, 2, and Comparative Examples 1-3 were all higher than that of Comparative Example 11, indicating that the chemical topping agent of mepiquat chloride and uniconazole can increase cotton yield more than mepiquat chloride alone. The seed cotton yields of Examples 1 and 2 were higher than that of Comparative Example 10, indicating that these two compound formulations also showed a higher yield increase compared to manual topping, with Example 2 showing the highest seed cotton yield.

[0070] The seed cotton yields produced from cotton treated with the capping agents of Examples 3-7 and Comparative Examples 4-12 are shown in Table 1.

[0071] Table 2: Seed cotton yield in examples with different pesticide application rates (unit: kg / mu)

[0072] As shown in Table 2, the seed cotton yield of Comparative Example 12 was lower than that of the other examples and comparative examples, indicating that topping treatment (including manual topping and chemical topping) can increase cotton yield. The seed cotton yield of Comparative Example 10 was higher than that of Comparative Example 11, indicating that cotton with manual topping yielded more than cotton topped with conventional chemical topping agents. The seed cotton yields of Examples 2-7 were higher than those of Comparative Example 10, indicating that within the appropriate dosage range, topping with the reagent of this invention on field cotton can achieve a higher seed cotton yield than manual topping. The seed cotton yields of Examples 2-7 and Comparative Example 6 were higher than those of Comparative Example 11, indicating that within the appropriate dosage range, topping with the topping agent of this invention on field cotton is superior to topping with conventional chemical topping agents. Example 2 had the highest seed cotton yield and was the optimal dosage example, indicating that the dosage of Example 2 was approximately the most suitable dosage for chemical topping of field cotton.

[0073] Other technical support and precautions for implementing this invention are as follows: (1) After using the sealing agent of this invention on cotton, water and fertilizer should be applied in appropriate amounts. It is strictly prohibited to use it on plots where there is severe water and fertilizer deficiency and flower and boll drop. It is not recommended to use it on cotton that is growing too vigorously or too tall.

[0074] (2) If there is a missed spraying when applying pesticides to cotton, the expected topping effect will not be achieved.

[0075] (3) Before and after using the capping agent of this invention, it is forbidden to spray gibberellin or other growth-promoting products on cotton.

[0076] (4) Excessive water use and nitrogen fertilizer application in cotton fields will affect the topping effect.

[0077] (5) Avoid watering and fertilizing for 3 days before and after spraying the sealing agent of this invention. For drip-irrigated cotton fields, the drip interval needs to be adjusted.

[0078] (5) It is strictly forbidden to mix with pesticides containing hormones. Pay attention to the prevention and control of cotton bollworm and spider mites.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cotton chemical capping agent, comprising mepiquat chloride and uniconazole, characterized in that, It also includes a high-temperature resistant component and trace elements; the mass ratio of the high-temperature resistant component to the trace elements is (0.6-3.6):1; the high-temperature resistant component is selected from salicylic acid, proline and sucrose; the trace elements are selected from borax.

2. The cotton chemical capping agent according to claim 1, characterized in that, By weight, it includes: 3.6-8.4 parts of mepiquat chloride, 1.2-2.8 parts of uniconazole, 0.6-1.4 parts of salicylic acid, 6-14 parts of proline, 12-28 parts of sucrose, and 12-28 parts of borax.

3. The cotton chemical capping agent according to claim 2, characterized in that, By weight, it also includes: 6-14 parts of potassium dihydrogen phosphate and 6-14 parts of amino acids.

4. The cotton chemical capping agent according to claim 2 or 3, characterized in that, By weight, it also includes: 4.2-9.8 parts zinc sulfate, 4.2-9.8 parts manganese sulfate and 4.2-9.8 parts ferrous sulfate.

5. The cotton chemical capping agent according to claim 4, characterized in that, By weight, it includes: 6 parts mepiquat chloride, 2 parts uniconazole, 1 part salicylic acid, 10 parts proline, 20 parts sucrose, 20 parts borax, 10 parts potassium dihydrogen phosphate, 10 parts amino acids, 7 parts zinc sulfate, 7 parts manganese sulfate, and 7 parts ferrous sulfate.

6. A method for chemical capping of cotton, characterized in that, The cotton chemical topping agent according to any one of claims 1 to 5 is diluted with water and sprayed on the leaves of cotton during the topping period.

7. The method according to claim 6, characterized in that, The cotton plant has 10-12 fruiting branches; the plant height is 70-85 cm.

8. The method according to claim 6, characterized in that, When spraying by vehicle, dilute 100g of the sealing agent with 30-70kg of water; when spraying by aerial spraying, dilute 100g of the sealing agent with 1.5-2.0kg of water.

9. The method according to claim 7 or 8, characterized in that, Based on mepiquat chloride and uniconazole, the amount of mepiquat chloride used in the capping agent sprayed per acre of cotton field is 3.6-8.4g and the amount of uniconazole is 1.2-2.8g; preferably, the amount of mepiquat chloride is 4.2-7.2g and the amount of uniconazole is 1.4-2.4g.

10. The method according to claim 6, characterized in that, Apply 6-8 g of mepiquat chloride per acre of cotton field 6-8 days before spraying the capping agent.

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