Salicylic acid-based resistance enhancer for compositae plants

Abstract

The invention provides a salicylic acid-based resistance enhancer capable of being used for compositae plants, and belongs to the technical field of compositae plant protection. The preparation method of the resistance enhancer comprises the following steps: carrying out first mixing on salicylic acid and a solvent, and then mixing with water to obtain a salicylic acid solution; mixing the salicylic acid solution with a plant extract, and stirring to obtain a first mixed solution; and mixing the first mixed solution, a surfactant and a stabilizer to obtain the resistance enhancer for compositae plants. The salicylic acid is dissolved in the specific solvent and then mixed with water to prepare the salicylic acid solution, and the solubility of the salicylic acid is improved through the specific solvent; the activity of the salicylic acid is improved by adding the plant extract and the surfactant, and the stability of the salicylic acid is improved by adding the stabilizer, so that the stability and the use effect of the resistance enhancer are improved.

Description

Technical Field

[0001] The invention relates to the technical field of chrysanthemum plant protection, in particular to a resistance enhancer based on salicylic acid that can be used for chrysanthemum plants. Background Art

[0002] Asteraceae plants are a large and important economic crop, including chrysanthemum, dandelion, sunflower, etc. Asteraceae plants are widely distributed throughout the world, especially in temperate regions, but relatively rare in tropical regions. In China, there are about 233 genera and nearly 3,000 species of Asteraceae plants, which are distributed throughout the country. Asteraceae plants contain a variety of ingredients with medicinal value, such as sesquiterpene lactones, which have cardiotonic, anti-cancer, anthelmintic, and analgesic effects. In China, about 300 species of Asteraceae plants can be used as medicine, such as chrysanthemum, Artemisia annua, coltsfoot, and Senecio odoratus; there are many famous ornamental plants in Asteraceae plants, such as chrysanthemum, Artemisia selengensis, and Calendula. The flowers of these plants are rich in color and various in shape, and have high ornamental value; in addition to medicinal and ornamental uses, Asteraceae plants also have other economic values. For example, sunflower, Xanthium sibiricum, sunflower seed, etc. can be used as oil plants; stevia contains extremely high sugar content and can be used as raw material in the food industry; Jerusalem artichoke tubers can be processed into pickles; and the leaves of Artemisia balsamifera can be used to make borneol, etc.

[0003] However, these plants are often attacked by diseases and insect pests during their growth, resulting in reduced yield and quality. Therefore, improving the disease and insect pest resistance of Asteraceae plants is of great significance for agricultural production.

[0004] Salicylic acid (SA) is an important plant endogenous signal molecule that can activate the plant's disease resistance defense response. When plants are infected by pathogens (such as bacteria, fungi and viruses), salicylic acid will quickly accumulate in the plant body and trigger a series of disease resistance responses. These responses include inducing plants to produce proteins related to the disease process (PR-proteins). These proteins have the characteristics of anti-proteolytic enzymes, can resist the infection of pathogens, and are potential disease resistance substances for plants. Salicylic acid can also increase the activity of disease-resistant enzymes in plants, such as phenylalanine ammonia lyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO), thereby enhancing the disease resistance of plants; in addition to disease resistance, salicylic acid is also involved in regulating a variety of stress resistance in plants, including salt resistance, drought resistance, low temperature resistance, UV resistance and heavy metal resistance.

[0005] However, there are still few studies on the application of salicylic acid in enhancing the resistance of Asteraceae plants, and the salicylic acid products currently on the market have problems such as poor stability and unstable effects, which limit their widespread application.

[0006] Therefore, it is of great practical significance to provide a stable resistance enhancer based on salicylic acid that can be used in Asteraceae plants. Summary of the invention

[0007] The purpose of the present invention is to provide a resistance enhancer based on salicylic acid that can be used for Asteraceae plants, aiming to solve the technical problems of poor stability and unstable effects of salicylic acid products in the prior art. The resistance enhancer obtained by the present invention has good stability and stable effects.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0009] The present invention provides a resistance enhancer based on salicylic acid that can be used for Asteraceae plants, comprising the following components in parts by weight:

[0010] 10-20 parts of salicylic acid, 30-50 parts of solvent, 5-10 parts of plant extract, 2-5 parts of surfactant and 1-3 parts of stabilizer.

[0011] Furthermore, the plant extract is one or more of tea polyphenols and soy isoflavones.

[0012] Furthermore, the surfactant is Tween-80.

[0013] Furthermore, the stabilizer is vitamin C or vitamin E.

[0014] Furthermore, the solvent is ethanol or propylene glycol.

[0015] The present invention also provides a method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to the above technical solution, comprising the following steps:

[0016] The salicylic acid is first mixed with a solvent and then mixed with water to obtain a salicylic acid solution;

[0017] Mixing the salicylic acid solution with the plant extract and stirring to obtain a first mixed solution;

[0018] The first mixed solution, a surfactant and a stabilizer are mixed to obtain the resistance enhancer that can be used for plants in the family.

[0019] Furthermore, the temperature of the first mixing is 30-35°C.

[0020] Furthermore, the mass ratio of salicylic acid to water is 1-5:50-100.

[0021] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0022] (1) The present invention first dissolves salicylic acid in a solvent such as ethanol to increase the solubility of salicylic acid in the solution, so that salicylic acid can maximize its resistance-enhancing effect;

[0023] (2) The present invention enhances the activity of salicylic acid by adding surfactants and plant extracts. The added plant extracts can also be antioxidant, maintain the stability of salicylic acid activity, and thus enhance the activity of the resistance enhancer;

[0024] (3) The present invention improves the stability of salicylic acid itself by adding a stabilizer, making it less likely to decompose and having a long effective period, thereby improving the stability of the resistance enhancer. DETAILED DESCRIPTION

[0025] The present invention provides a resistance enhancer based on salicylic acid that can be used for Asteraceae plants, comprising the following components in parts by weight:

[0026] 10-20 parts of salicylic acid, 30-50 parts of solvent, 5-10 parts of plant extract, 2-5 parts of surfactant and 1-3 parts of stabilizer.

[0027] In the present invention, unless otherwise specified, the required raw materials for preparation are all commercially available products well known to those skilled in the art.

[0028] The salicylic acid-based resistance enhancer for Asteraceae plants of the present invention preferably comprises 10-20 parts of salicylic acid, 30-50 parts of solvent, 5-10 parts of plant extract, 2-5 parts of surfactant and 1-3 parts of stabilizer, further preferably comprises 10-18 parts of salicylic acid, 30-40 parts of solvent, 5-8 parts of plant extract, 2-4 parts of surfactant and 1-2 parts of stabilizer, more preferably comprises 10-15 parts of salicylic acid, 30-35 parts of solvent, 5-6 parts of plant extract, 2-3 parts of surfactant and 1-2 parts of stabilizer.

[0029] In the present invention, the plant extract is one or more of tea polyphenols and soybean isoflavones.

[0030] The present invention enhances the activity of salicylic acid by adding plant extracts, and the tea polyphenols can also be used as antioxidants to effectively reduce the possibility of oxidative decomposition of salicylic acid and enhance its activity.

[0031] In the present invention, the surfactant is preferably Tween-80.

[0032] In the present invention, the stabilizer is vitamin C or vitamin E.

[0033] The present invention maintains the stability of salicylic acid by adding a stabilizer. Meanwhile, the stabilizer used in the present invention is a non-chemical preparation, which is more environmentally friendly and will not cause additional damage to plants.

[0034] In the present invention, the solvent is preferably ethanol or propylene glycol.

[0035] The present invention also provides a method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to the above technical solution, comprising the following steps:

[0036] The salicylic acid is first mixed with a solvent and then mixed with water to obtain a salicylic acid solution;

[0037] Mixing the salicylic acid solution with the plant extract and stirring to obtain a first mixed solution;

[0038] The first mixed solution, a surfactant and a stabilizer are mixed to obtain the resistance enhancer that can be used for plants in the family.

[0039] The present invention preferably dissolves salicylic acid in a solvent first and then mixes it with water to obtain the salicylic acid solution. The solvent can further increase the solubility of salicylic acid, thereby increasing the resistance enhancing effect of the resistance enhancer on plants.

[0040] In the present invention, the temperature of the first mixing is preferably 30 to 35°C, and more preferably 30 to 33°C.

[0041] The present invention appropriately raises the temperature of the solvent and salicylic acid to improve the solubility of salicylic acid in the solvent, thereby improving the solubility of salicylic acid in the final resistance enhancer and further maintaining its activity.

[0042] In the present invention, the mass ratio of salicylic acid to water is preferably 1-5:50-100, more preferably 1-4:50-80, and even more preferably 1-3:50-60.

[0043] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0044] Example 1

[0045] (1) mixing 10 parts of salicylic acid and 30 parts of ethanol at 30° C., stirring the mixture evenly, and then mixing the mixture with 100 parts of water, stirring the mixture evenly to obtain a salicylic acid solution;

[0046] (2) mixing the salicylic acid solution with 5 parts of tea polyphenols, and stirring evenly to obtain a first mixed solution;

[0047] (3) The first mixed solution is mixed with 2 parts of Tween-80 and 1 part of vitamin C, and stirred evenly to obtain the resistance enhancer that can be used for Asteraceae plants.

[0048] Example 2

[0049] (1) mixing 20 parts of salicylic acid and 50 parts of ethanol at 30° C., stirring the mixture evenly, and then mixing the mixture with 200 parts of water, stirring the mixture evenly to obtain a salicylic acid solution;

[0050] (2) mixing the salicylic acid solution with 8 parts of tea polyphenols, and stirring evenly to obtain a first mixed solution;

[0051] (3) The first mixed solution is mixed with 5 parts of Tween-80 and 3 parts of vitamin C, and stirred evenly to obtain the resistance enhancer that can be used for Asteraceae plants.

[0052] Example 3

[0053] (1) mixing 18 parts of salicylic acid and 40 parts of propylene glycol at 33° C., stirring the mixture evenly, and then mixing the mixture with 180 parts of water, stirring the mixture evenly to obtain a salicylic acid solution;

[0054] (2) mixing the salicylic acid solution with 5 parts of soy isoflavones, and stirring evenly to obtain a first mixed solution;

[0055] (3) The first mixed solution is mixed with 3 parts of Tween-80 and 1 part of vitamin E, and stirred evenly to obtain the resistance enhancer that can be used for Asteraceae plants.

[0056] Example 4

[0057] (1) 15 parts of salicylic acid and 35 parts of propylene glycol are mixed at 33° C., stirred evenly, and then mixed with 150 parts of water, and stirred evenly to obtain a salicylic acid solution;

[0058] (2) mixing the salicylic acid solution with 6 parts of soy isoflavones, and stirring evenly to obtain a first mixed solution;

[0059] (3) The first mixed solution is mixed with 3 parts of Tween-80 and 1 part of vitamin E, and stirred evenly to obtain the resistance enhancer that can be used for Asteraceae plants.

[0060] Application Example 1

[0061] (1) Prepare 100 pots of well-grown chrysanthemums and place them in an environment of 20°C for cultivation;

[0062] (2) The resistance enhancer obtained in Example 1 was sprayed on the surface of leaves of 50 prepared pots of chrysanthemums, once every 7 days, for 3 consecutive times, and the growth and occurrence of diseases and insect pests of the chrysanthemums sprayed with the resistance enhancer and those not sprayed with the resistance enhancer were observed.

[0063] Application Example 2

[0064] (1) Prepare 100 pots of well-grown chrysanthemums and place them in an environment of 20°C for cultivation;

[0065] (2) The resistance enhancer obtained in Example 2 was sprayed on the surface of leaves of 50 prepared pots of chrysanthemums, once every 8 days, for 4 consecutive times, and the growth and occurrence of diseases and insect pests of the chrysanthemums sprayed with the resistance enhancer and those not sprayed with the resistance enhancer were observed.

[0066] Application Example 3

[0067] (1) Prepare 100 pots of well-grown chrysanthemums and place them in an environment of 20°C for cultivation;

[0068] (2) The resistance enhancer obtained in Example 3 was sprayed on the surface of leaves of 50 prepared pots of chrysanthemums, once every 9 days for 3 consecutive times, and the growth and occurrence of diseases and insect pests of the chrysanthemums sprayed with the resistance enhancer and those not sprayed with the resistance enhancer were observed.

[0069] Application Example 4

[0070] (1) Prepare 100 pots of well-grown chrysanthemums and place them in an environment of 20°C for cultivation;

[0071] (2) The resistance enhancer obtained in Example 4 was sprayed on the surface of leaves of 50 prepared pots of chrysanthemums, once every 10 days, for 4 consecutive times, and the growth and occurrence of diseases and insect pests of the chrysanthemums sprayed with the resistance enhancer and not sprayed with the resistance enhancer were observed.

[0072] By observing and recording the growth and growth conditions of the chrysanthemums sprayed with the resistance enhancer and those not sprayed with the resistance enhancer in Application Examples 1 to 4, and comparing them, it was found that the growth of the chrysanthemums sprayed with the resistance enhancer was better than that of the chrysanthemums not sprayed with the resistance enhancer, and the occurrence of diseases and insect pests was also less. Based on this, it can be seen that the resistance enhancer obtained by the present invention can significantly improve the disease and insect pest resistance of Asteraceae plants, reduce the losses caused by diseases and insect pests, and is beneficial to the growth of Asteraceae plants. At the same time, based on the components of the resistance enhancer of the present invention, it can be seen that the resistance enhancer components are environmentally friendly, non-toxic and harmless, and are environmentally friendly, meeting the development requirements of green agriculture, and the use method of the resistance enhancer of the present invention is simple and convenient, and easy to promote.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A resistance enhancer based on salicylic acid that can be used for Asteraceae plants, characterized in that: The composition includes the following components in parts by weight: 10-20 parts of salicylic acid, 30-50 parts of solvent, 5-10 parts of plant extract, 2-5 parts of surfactant and 1-3 parts of stabilizer.

2. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 1, characterized in that: The plant extract is one or more of tea polyphenols and soybean isoflavones.

3. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 1, characterized in that: The surfactant is Tween-80.

4. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 1, characterized in that: The stabilizer is vitamin C or vitamin E.

5. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 1, characterized in that: The solvent is ethanol or propylene glycol.

6. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to any one of claims 1 to 5, characterized in that: The following steps are involved: The salicylic acid is first mixed with a solvent and then mixed with water to obtain a salicylic acid solution; Mixing the salicylic acid solution with the plant extract and stirring to obtain a first mixed solution; The first mixed solution, a surfactant and a stabilizer are mixed to obtain the resistance enhancer that can be used for plants in the family.

7. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 6, characterized in that: The temperature of the first mixing is 30-35°C.

8. The method for preparing a resistance enhancer for Asteraceae plants based on salicylic acid according to claim 6, characterized in that: The mass ratio of salicylic acid to water is 1-5:50-100.