Transplanting defoliant suitable for Chinese scholartree as well as preparation method and application of transplanting defoliant

Abstract

The invention relates to the technical field of defoliating agents, and particularly discloses a transplanting defoliating agent suitable for Chinese scholartree as well as a preparation method and application of the transplanting defoliating agent. The defoliant provided by the invention comprises a component A and a component B, the component A is prepared from the following components: 3 to 7g / L of ethephon, 0.1 to 0.5 g / L of Silwet L-77 organic silicon, 0.02 to 0.08 g / L of pericarpium citri reticulatae viride orange oil and 0.1 to 0.5 g / L of mineral oil; the solvent is water; the component B comprises the following components: 3-7 g / L of thidiazuron, 5-8 g / L of diquat and 0.6-1.2 g / L of an auxiliary agent; the solvent is water; the auxiliary agent is prepared by mixing Break-Thru S240 organic silicon, pericarpium citri reticulatae viride orange oil, quercetin and sophocarpine according to the weight ratio of (8 to 12): (2 to 6): (1 to 3): (0.5 to 3). The defoliating agent provided by the invention can perform directional area defoliation on Chinese scholartree, and is low in comprehensive cost, simple in use method and efficient in defoliating effect.

Description

Technical Field

[0001] The present application relates to the technical field of defoliants, and in particular to a transplant defoliant suitable for Sophora japonica, and a preparation method and application thereof. Background Art

[0002] How to promote efficient tree survival during transplantation is a difficult point in landscaping projects. Usually, a variety of technical means are needed to balance the tree vigor and improve the survival rate, such as pruning and manual leaf removal. Traditional leaf removal requires a large amount of manpower in a short period of time to remove the leaves one by one, which is inefficient and costly. The high cost and time-consuming and labor-intensive nature of the process limits the implementation of the project. Currently, chemical defoliants are only used during the leaf-falling harvest period of agricultural crops (such as cotton) and have not been used during the growing season. At the same time, woody plants are large and strong in growth, have strong resistance, thick leaf cuticles, and poor penetration of chemicals. Currently, defoliation products on the market have no effect on tree defoliation, and the simple use of growth regulators has little effect on trees in their vigorous growth period.

[0003] In recent years, the research on the combination of growth regulators and herbicides, and growth regulators and defoliants has become a hot topic. In cotton applications, the defoliation time of defoliants generally lasts 10 to 25 days; however, there is currently a blank in the research on defoliation of garden tree species, and there is no special formula for specific Sophora japonica species. Summary of the Invention

[0004] In order to promote the efficient survival of Sophora japonica trees, the present application provides a transplant defoliant suitable for Sophora japonica, and a preparation method and application thereof.

[0005] In a first aspect, the present application provides a transplant defoliant suitable for Sophora japonica, comprising component A and component B; The A component includes the following components in the following concentrations: 3-7 g / L of ethephon, 0.1-0.5 g / L of Silwet L-77 silicone, 0.02-0.08 g / L of green citrus oil, and 0.1-0.5 g / L of mineral oil; the solvent is water; The B component includes the following components at the following concentrations: 3-7 g / L of thidiazuron, 5-9 g / L of diquat, and 0.5-0.9 g / L of an adjuvant; the solvent is water; and the adjuvant is a mixture of Break-Thru S240 silicone, citrus aurant oil, quercetin, and sophocarpine in a weight ratio of 8-12:2-6:1-3:0.5-3.

[0006] Preferably, the component A comprises the following components at the following concentrations: 4-6 g / L of ethephon, 0.2-0.4 g / L of silicone, 0.04-0.06 g / L of citrus oil, and 0.2-0.4 g / L of mineral oil; and the solvent is water.

[0007] In a specific embodiment, the A component includes the following components at the following concentrations: 5 g / L ethephon, 0.3 g / L silicone, 0.05 g / L green citrus oil, and 0.3 g / L mineral oil; and the solvent is water.

[0008] Preferably, the component A further comprises ethanol, and the weight ratio of ethanol to ethephon is 80-120:1.

[0009] Preferably, the B component comprises the following components at the following concentrations: 4-6 g / L of thidiazuron, 6-8 g / L of diquat, and 0.6-0.8 g / L of adjuvant.

[0010] Preferably, the B component comprises the following components at the following concentrations: 4.5-5.5 g / L of thidiazuron, 6.5-7.5 g / L of diquat, and 0.65-0.75 g / L of adjuvant.

[0011] Preferably, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green orange oil, quercetin and sophocarpine in a weight ratio of 9-11:3-5:1.5-2.5:1-2.

[0012] Preferably, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green citrus oil, quercetin and sophocarpine in a weight ratio of 9.5-10.5:3.5-4.5:1.7-2.2:1.2-1.8.

[0013] In a second aspect, the present application provides a method for preparing the above-mentioned transplant defoliant suitable for Sophora japonica, which specifically comprises the following steps in sequence: Dilute ethephon to 80-120 times by weight of ethanol, then add it to water with Silwet L-77 silicone, green tangerine oil, and mineral oil to prepare component A of corresponding concentration; Thidiazuron, diquat and adjuvant are added into water to prepare component B of corresponding concentration.

[0014] In a third aspect, the present application provides the use of the above-mentioned defoliant in regulating the growth of Sophora japonica species.

[0015] In a fourth aspect, the present application provides a method for using the above-mentioned transplant defoliant suitable for Sophora japonica, which specifically comprises the following steps in sequence: Spray component A on 2 / 3 to 4 / 5 of the crown of garden tree species until water drips onto the leaves; After 2-4 hours, spray component B on 2 / 3 to 4 / 5 of the crown of the garden tree species until water drips from the leaves.

[0016] The present application designs a dual-stage action formula, and the defoliant consists of component A and component B; the ethephon in component A can release ethylene, first inducing the activation of abscission layer cells, promoting abscission layer formation, and accelerating leaf aging and shedding; the thiadiazole in component B used after a period of time acts as a cytokinin analogue, inducing leaf fall by blocking auxin transport, while reducing transpiration and enhancing ethephon-induced abscission layer formation; diquat, as a contact herbicide of the bipyridinium salt class, inhibits photosynthetic electron transfer, destroys cell membranes, destroys chloroplast structure, and accelerates leaf dehydration and death.

[0017] During testing, the applicant discovered that the combination of Break-Thru S240 silicone, tangerine oil, quercetin, and sophocarpine as adjuvants demonstrated excellent results. Break-Thru S240 silicone, a highly effective surfactant, reduces the surface tension of water, improving the wettability and spreadability of the defoliant on the leaf surface. This allows the defoliant to more evenly coat the leaf surface, enhancing its effectiveness. The silicone also enhances the defoliant's penetration, allowing it to more easily penetrate the leaf interior and improve defoliation efficiency. Tangerine oil, with its natural insecticide and fungicide properties, effectively controls pests and diseases, protecting plant health. Adding tangerine oil to the defoliant not only enhances defoliation effectiveness but also reduces the impact of pests and diseases on plants, improving their resistance to stress. Mineral oil, as an adjuvant, enhances the stability and durability of the defoliant. It forms a protective film on the leaf surface, preventing the defoliant from being washed away by rain or decomposed by ultraviolet rays, thereby extending its service life. Quercetin interferes with photosynthesis-related processes (such as inhibiting photosynthetic pigment synthesis or disrupting chloroplast structure) by affecting the osmotic pressure or enzyme activity of leaf cells. This may inhibit the transport or action of auxins (such as indoleacetic acid), disrupting the hormonal balance in the plant and causing premature leaf aging, withering, and shedding. Sophoracarpine can disrupt cell membrane permeability, leading to cellular dysfunction and accelerated leaf aging. It may also affect the synthesis or signal transduction of abscisic acid in the plant, thereby indirectly inducing leaf shedding. These components can promote the synthesis of abscisic acid or enhance its effects, while inhibiting the activity of auxins and cytokinins, causing leaves to shed.

[0018] In summary, the technical solution of this application has the following effects: The transplant defoliant suitable for Sophora japonica provided in this application can be used for chemical defoliation in the nursery, and the transplanted plants can be removed from the nursery after defoliation in a targeted area, which greatly reduces the pressure of emergency treatment during on-site construction.

[0019] The transplant defoliant suitable for Sophora japonica provided in this application is used as a chemical agent for treatment. A single spray of the agent can solve labor-intensive and heavy work. It has low overall cost, simple use method and efficient defoliation effect.

[0020] The transplant defoliant suitable for Sophora japonica provided in the present application causes little physical damage to the crown by chemically removing leaves, can fully preserve the crown structure and the ornamental value of the tree, and has a high survival rate of buds in the following year.

[0021] The transplant defoliant suitable for Sophora japonica provided in the present application can remove leaves in advance, which is beneficial for off-season planting and seedling acclimatization, and improves the survival rate of transplanting. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with examples, comparative examples and performance testing experiments. These examples should not be construed as limiting the scope of protection claimed in this application.

[0023] The ethephon (CAS: 16672-87-0; model Y0201-100G) used in this application was purchased from Hefei BASF Biotechnology Co., Ltd.; thidiazuron (active ingredient content 50%; product standard number HG / T 5238-2017) was purchased from Jiangsu Ruibang Agrochemical Co., Ltd.; diquat (active ingredient content 200 g / L; product standard number HG / T 5246-2017) was purchased from Shandong Shengpeng Technology Co., Ltd.; green citrus oil (Keosun) was purchased from Shantou Feixiang Agricultural Materials Co., Ltd.; mineral oil was purchased from Guoguang Lepu; quercetin (product number MF-003025), sophocarpine (product number MF-005345), and berberine hydrochloride (product number MF-000982) were purchased from Xinyang Mufan Biotechnology Co., Ltd.; other raw materials can be obtained commercially. Example

[0024] Examples 1-5 Examples 1-5 respectively provide a transplant defoliant suitable for Sophora japonica and a preparation method thereof.

[0025] The difference between the above embodiments is that the composition concentration of each component in the transplant defoliant suitable for Sophora japonica is different, as shown in Table 1.

[0026] The specific method for preparing the transplant defoliant suitable for Sophora japonica in the above embodiment is as follows.

[0027] Ethephon was diluted in ethanol, and then added to water with Silwet L-77 silicone, green orange oil, and mineral oil to prepare component A of corresponding concentration (measured with water as solvent); Thidiazuron, diquat, and an adjuvant (composed of a mixture of Break-Thru S240 silicone, citrus aurant oil, quercetin, and sophocarpine in a weight ratio of 10:4:2:1.5) are added to water to prepare a component B of corresponding concentration; wherein quercetin and sophocarpine are used by dissolving the corresponding weight of the raw materials in 10 times the weight of ethanol, and then serving as an adjuvant.

[0028] Table 1 Composition of the transplant defoliant suitable for Sophora japonica in Examples 1-5 and Comparative Examples 1-2 Examples 6-9 Examples 6-9 respectively provide a transplant defoliant suitable for Sophora japonica and a preparation method thereof.

[0029] The difference between the above embodiment and embodiment 1 is that the composition of the auxiliary agent in component B is different, as shown below.

[0030] In Example 6, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green orange oil, quercetin, and sophocarpine in a weight ratio of 8:6:1:3.

[0031] In Example 7, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green orange oil, quercetin, and sophocarpine in a weight ratio of 12:2:3:0.5.

[0032] In Example 8, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green orange oil, quercetin, and sophocarpine in a weight ratio of 9:5:1.5:3.

[0033] In Example 9, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green orange oil, quercetin, and sophocarpine in a weight ratio of 11:3:2.5:1.

[0034] The other process parameters in the above embodiment are the same as those in Example 1.

[0035] Comparative Example Comparative Example 1-2 Comparative Examples 1-2 respectively provide a transplant defoliant suitable for Sophora japonica and a preparation method thereof.

[0036] The difference between the comparative example and Example 1 is that the composition concentration of each component in the transplant defoliant suitable for Sophora japonica is different, as shown in Table 1.

[0037] The other process parameters in the above comparative example are the same as those in Example 1.

[0038] Comparative Examples 3-5 Comparative Examples 3-5 respectively provide a transplant defoliant suitable for Sophora japonica and a preparation method thereof.

[0039] The differences between the comparative example and Example 1 are specifically as follows.

[0040] In Comparative Example 3: no quercetin or sophocarpine was added to the adjuvant.

[0041] In Comparative Example 4, an equal amount of berberine hydrochloride was used in place of sophoracarpine in the adjuvant.

[0042] In Comparative Example 5, the auxiliary agent is composed of a mixture of Break-Thru S240 silicone, green citrus oil, quercetin, and sophocarpine in a weight ratio of 15:1:0.5:5.

[0043] The other process parameters in the above comparative example are the same as those in Example 1.

[0044] Performance testing Effects of Defoliants on Garden Tree Species-Sophora japonica Test garden tree species: healthy adult Sophora japonica (5-7 years old, with similar crown width), randomly divided into groups (test group - defoliant prepared in Example or Comparative Example). Test time: September 20, 2024.

[0045] Spray component A on 2 / 3 to 4 / 5 of the crown of garden tree species until water drips onto the leaves; After 3 hours, spray component B on 2 / 3 to 4 / 5 of the crown of the garden tree species until water drips from the leaves.

[0046] (1) Defoliation effect detection: record the time when leaves begin to fall off, the time when the leaf shedding rate reaches 80%, the time when the leaf shedding rate reaches 90%, and the time when new buds sprout (the time is based on the time and dosage of spraying the solution).

[0047] (2) Morphological evaluation of bud survival rate: direct observation was used for 2 consecutive weeks starting from March 1 of the following year. The evaluation criteria are as follows.

[0048] Level 0: The buds are plump, green, and germinated normally; the result is considered to be survival; Level 1: The buds are slightly shrunken and partially germinated; the result is half-survival; Level 2: The buds are dry and brown, with no signs of germination; the result is death; The calculation formula is: bud eye survival rate (%) = (number of level 0 buds + 0.5 × number of level 1 buds total number of marked buds) / total number of marked buds × 100.

[0049] Test results: as shown in Table 2.

[0050] Table 2 Test results of the application effect of defoliants in Examples and Comparative Examples From the test results in the above table, it can be seen that the defoliant prepared using the technical solution provided by the present application has excellent defoliation performance for Sophora japonica garden tree species, and the bud survival rate in the following year is relatively high, indicating that the defoliant prepared by the present application has a low degree of damage to Sophora japonica buds and a high safety of the agent.

[0051] By comparing the test results of Examples 1-5 and Comparative Examples 1-2, it can be seen that the amount of each raw material component in Component B of the transplant defoliant suitable for Sophora japonica has a significant impact on the performance of the defoliant. The present application utilizes specific concentrations of raw materials as Component A and Component B, respectively, to prepare a defoliant with excellent performance.

[0052] By comparing the test results of Examples 1, 6-9, and Comparative Example 3, it can be seen that in Comparative Example 3, no quercetin or sophocarpine was added to the adjuvant, in Comparative Example 4, an equal amount of berberine hydrochloride was used instead of sophocarpine, and in Comparative Example 5, the adjuvant was composed of a mixture of Break-Thru S240 silicone, green tangerine oil, quercetin, and sophocarpine in a weight ratio of 15:1:0.5:5. The performance of the defoliants prepared in the above comparative examples was poor. In contrast, the defoliant prepared in the present application, which was composed of a mixture of Break-Thru S240 silicone, green tangerine oil, quercetin, and sophocarpine in a weight ratio of 8-12:2-6:1-3:0.5-3, was excellent in performance.

[0053] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the present invention. Therefore, such modifications and improvements, which do not depart from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A transplant defoliant suitable for Sophora japonica, characterized in that: It includes component A and component B; The A component includes the following components in the following concentrations: 3-7 g / L of ethephon, 0.1-0.5 g / L of Silwet L-77 silicone, 0.02-0.08 g / L of green citrus oil, and 0.1-0.5 g / L of mineral oil; the solvent is water; The B component includes the following components at the following concentrations: 3-7 g / L of thidiazuron, 5-9 g / L of diquat, and 0.5-0.9 g / L of an adjuvant; the solvent is water; and the adjuvant is a mixture of Break-Thru S240 silicone, citrus aurant oil, quercetin, and sophocarpine in a weight ratio of 8-12:2-6:1-3:0.5-3.

2. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that The component A comprises the following components in the following concentrations: 4-6 g / L of ethephon, 0.2-0.4 g / L of organosilicon, 0.04-0.06 g / L of green citrus oil, and 0.2-0.4 g / L of mineral oil; and the solvent is water.

3. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that The component A also includes ethanol, and the weight ratio of ethanol to ethephon is 80-120:

1.

4. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that The B component includes the following components at the following concentrations: 4-6 g / L of thidiazuron, 6-8 g / L of diquat, and 0.6-0.8 g / L of adjuvant.

5. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that The B component includes the following components at the following concentrations: 4.5-5.5 g / L of thidiazuron, 6.5-7.5 g / L of diquat, and 0.65-0.75 g / L of adjuvant.

6. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that The auxiliary agent is prepared by mixing Break-Thru S240 silicone, green citrus oil, quercetin and sophocarpine in a weight ratio of 9-11:3-5:1.5-2.5:1-2.

7. The transplant defoliant suitable for Sophora japonica according to claim 1, characterized in that: The auxiliary agent is prepared by mixing Break-Thru S240 silicone, green citrus oil, quercetin and sophocarpine in a weight ratio of 9.5-10.5:3.5-4.5:1.7-2.2:1.2-1.

8.

8. A method for preparing a transplant defoliant suitable for Sophora japonica according to any one of claims 1 to 7, characterized in that: Specifically, the following steps are performed in sequence: Dilute ethephon to 80-120 times by weight of ethanol, then add it to water with Silwet L-77 silicone, green tangerine oil, and mineral oil to prepare component A of corresponding concentration; Thidiazuron, diquat and adjuvant are added to water to prepare component B of corresponding concentration.

9. Use of the defoliant according to any one of claims 1 to 7 in regulating the growth of Sophora japonica species.

10. A method for using the transplant defoliant suitable for Sophora japonica according to any one of claims 1 to 7, characterized in that: Specifically, the following steps are performed in sequence: Spray component A on 2 / 3 to 4 / 5 of the crown of garden tree species until water drips onto the leaves; After 2-4 hours, spray component B on 2 / 3 to 4 / 5 of the crown of the garden tree species until water drips from the leaves.

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