Plant growth regulator for inhibiting side buds and side branches of kiwi fruits and application of plant growth regulator

Abstract

The invention relates to the technical field of pesticides, in particular to a plant growth regulator for inhibiting lateral buds and lateral branches of kiwi fruits and application of the plant growth regulator. The plant growth regulator comprises indolebutyric acid and naphthylacetic acid, the effective concentration of the indolebutyric acid is 80-320 ppm, and the effective concentration of the naphthylacetic acid is 20-80 ppm. According to the plant growth regulator, indolebutyric acid and naphthylacetic acid are prepared according to a proper concentration and then sprayed to bearing branches of outer bores of kiwi fruits, lateral bud germination and lateral branch growth of the kiwi fruits can be effectively inhibited, fruit growth can be promoted, manual pruning can be effectively replaced, and the yield of the kiwi fruits is increased. The labor demand is reduced, the production cost is reduced, and the planting income of kiwi fruits is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, in particular to a plant growth regulator for inhibiting lateral buds and branches of kiwifruit and application thereof. Background Art

[0002] Kiwifruit is native to China and has been cultivated in my country for more than 1,300 years. At present, China is a veritable kiwifruit producing country, with a planting area of ​​more than 4 million mu nationwide, and the orchard area ranks first in the world. The production areas span the north and south, mainly distributed in Shaanxi, Sichuan, Hunan, Guizhou, Henan, Shandong, Yunnan and other places. The planting area continues to increase, excellent varieties are constantly being introduced, the circulation system is gradually improved, and the market is active.

[0003] Kiwifruit is a large vine plant. Most varieties have strong growth potential and large branch growth. If not controlled, the branches and vines will be entangled with each other in the later stage, resulting in poor ventilation and light transmission, which is not conducive to the growth and development of the fruit. It is also easy to aggravate the occurrence of diseases, causing fruit drop, and seriously reducing the yield and quality of kiwifruit. Therefore, in production, the method of pinching is often used to control the vigorous growth of branches. However, one week after pinching, 1-2 side buds will continue to sprout between the axils of the top of the fruiting branch and continue to grow. The growers will pinch or dig out the secondary buds, which will increase the workload and cause the labor cost per mu to be between 150 yuan and 220 yuan. Some large kiwifruit planting companies also often have insufficient workers due to the large area, and pinching is not timely, resulting in the closure of the orchard, and serious diseases and insects causing fruit drop. With the shortage of agricultural labor, the production cost increases, the output is limited, and the planting profit will further decline, resulting in difficulties in the development of large kiwifruit planting companies and limiting the scale development of the industry.

[0004] In order to reduce the field production cost of kiwifruit and promote the large-scale development of the kiwifruit industry, it is very necessary to find a safe and efficient plant growth regulator that can inhibit the germination of lateral buds and branches of kiwifruit. Summary of the invention

[0005] In order to solve the defects in the prior art, the present invention provides a plant growth regulator for inhibiting lateral buds and branches of kiwifruit and its application. The plant growth regulator of the present invention is prepared by mixing indolebutyric acid and naphthaleneacetic acid at appropriate concentrations and then spraying on the fruiting branches of the outer bore of kiwifruit, which can effectively inhibit the germination of lateral buds and the growth of lateral branches of kiwifruit, and can also promote the growth of fruits, can effectively replace manual pruning, reduce labor demand, reduce production costs, and increase the income of kiwifruit planting.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a plant growth regulator for inhibiting lateral buds and branches of kiwifruit, wherein the plant growth regulator comprises indolebutyric acid and naphthylacetic acid, wherein the effective concentration of the indolebutyric acid is 80 to 320 ppm, and the effective concentration of the naphthylacetic acid is 20 to 80 ppm.

[0008] Preferably, the effective concentration of the indolebutyric acid is 160 to 320 ppm, and the effective concentration of the naphthylacetic acid is 40 to 80 ppm.

[0009] Preferably, the effective concentration of the indolebutyric acid is 160 ppm, and the effective concentration of the naphthylacetic acid is 40 ppm.

[0010] Preferably, the mass ratio of indolebutyric acid to naphthylacetic acid is 4:1.

[0011] Preferably, the plant growth regulator further comprises a pharmaceutically acceptable carrier, and the pharmaceutically acceptable carrier includes but is not limited to one or a combination of two or more of a solvent, a dispersant, a wetting agent, a humectant, a thickener, and a penetrant.

[0012] The dosage form of the plant growth regulator includes but is not limited to any one of an aqueous solution, a soluble solution, a thermal mist, a soluble granule, a soluble powder, and a suspension.

[0013] In a second aspect, the present invention provides a method for preparing the plant growth regulator, comprising thoroughly mixing the indolebutyric acid and naphthylacetic acid with a pharmaceutically acceptable carrier.

[0014] In a third aspect, the present invention provides the use of the above-mentioned plant growth regulator in inhibiting lateral buds and branches of kiwifruit.

[0015] Preferably, the plant growth regulator is applied during the budding stage of kiwifruit, when the inflorescence begins to separate, the length of the outer fruiting branch is about 20 cm, and the lateral buds have not yet sprouted. The drug is applied after pinching off 5-7 leaves above the flower buds at the top of the kiwifruit.

[0016] Preferably, the application amount of the plant growth regulator is 1 L / tree.

[0017] Preferably, the plant growth regulator is applied mainly to the upper and middle parts of the outer fruiting branches of kiwifruit.

[0018] The beneficial effects of the present invention are:

[0019] Auxin is a type of endogenous hormone containing an unsaturated aromatic ring and an acetic acid side chain, abbreviated as IAA in English, and its chemical nature is indoleacetic acid. In addition, 4-chloro-IAA, 5-hydroxy-IAA, naphthylacetic acid (NAA), indolebutyric acid, etc. are auxin-like substances. Auxin has many physiological effects, which are related to its concentration. It can promote growth at low concentrations, but inhibit growth or even kill plants at high concentrations. When the concentration of auxin is high, it will bind to receptors on the cell membrane and start signal pathways, thereby affecting gene expression and metabolic processes in cells. In this process, certain specific proteins or enzymes are activated or become inactive, thereby affecting the speed and direction of cell division and elongation, and ultimately leading to changes in plant morphology. The apical dominance that inhibits the growth of axillary buds in plant growth is closely related to the polar transport and distribution of auxin. The present invention utilizes the characteristics that indolebutyric acid is not easily conducted in the body after being absorbed by plants and often stays in an external position, and that naphthylacetic acid can enter the plant body through the tender epidermis of leaves and branches and seeds and be transported to the site of action along with the nutrient flow. After kiwifruit is pinched, spraying at an appropriate concentration can inhibit the germination of kiwifruit lateral buds and the growth of lateral branches, and promote the growth of kiwifruit fruits, thereby achieving the purpose of reducing labor demand, reducing production costs, and increasing planting benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall picture of the germination of lateral buds on the fruiting branches of kiwifruit 50 days after the agent of Example 2 was used.

[0021] Figure 2 This is a detailed picture of the germination of lateral buds on the fruiting branches of kiwifruit 50 days after the agent of Example 2 was used.

[0022] Figure 3 This is a detailed picture of the side buds on the fruiting branches of the clear water control group.

[0023] Figure 4 This is a detail of the side branches of the fruiting branches in the clear water control group. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Example 1

[0026] Add 6-7 L of clean water to the container, then add 15 ml of 8% indolebutyric acid solution and 15 ml of 2% naphthylacetic acid solution, and finally add clean water to 15 L to prepare a solution preparation containing 80 ppm indolebutyric acid and 20 ppm naphthylacetic acid.

[0027] Example 2

[0028] Add 6-7 L of clean water to the container, then add 30 ml of 8% indolebutyric acid solution and 30 ml of 2% naphthylacetic acid solution, and finally add clean water to 15 L to prepare a solution preparation containing 160 ppm indolebutyric acid and 40 ppm naphthylacetic acid.

[0029] Example 3

[0030] Add 6-7L of clean water to the container, then add 60ml of 8% indolebutyric acid solution and 60ml of 2% naphthylacetic acid solution, and finally add clean water to 15L to prepare a solution preparation containing 320ppm indolebutyric acid and 80ppm naphthylacetic acid.

[0031] Effect Example 1: Effect of inhibiting kiwifruit lateral bud germination

[0032] Experimental field conditions: Six experimental fields in Shaanxi and four experimental fields in Sichuan were selected for the experiment. Each experimental field had four treatments (specifically, the preparations prepared in Examples 1 to 3 and a water control group), three trees were selected for each treatment, and 30 fruiting branches of each tree were marked for statistics.

[0033] The applied agent was the preparation prepared in Examples 1 to 3 of the present invention, and a clear water control was set up in each test field.

[0034] Application time: during the budding period of kiwifruit, the inflorescence begins to separate, the outer fruiting branch is about 20cm long, and the lateral buds have not yet sprouted. Apply the pesticide after pinching off 5-7 leaves above the flower buds at the top of the kiwifruit. The application time is before 10:00 in the morning or after 16:00 in the afternoon.

[0035] Spraying amount: 1L / tree, focus on spraying the upper and middle parts of the outer fruiting branches of kiwifruit, without dripping.

[0036] Data statistics: 50 days after medication, the lateral bud germination rate was counted, lateral bud germination rate = lateral bud germination number / total bud number * 100%, the results are shown in Table 1 and Table 2.

[0037] Table 1. Test on the lateral bud germination effect of Shaanxi Xuxiang kiwifruit

[0038]

[0039]

[0040]

[0041] Table 2. Test on the germination effect of Sichuan Donghong kiwifruit lateral buds

[0042]

[0043] Through the statistical data of the Xuxiang kiwifruit test sites in Shaanxi and the Donghong kiwifruit test sites in Sichuan, it can be seen that the treatment with indolebutyric acid with an effective concentration of 80-320ppm and naphthaleneacetic acid with an effective concentration of 20-80ppm can significantly reduce the germination rate of kiwifruit side buds, thereby reducing the workload of manual secondary pinching, and with the increase of effective concentration, the effect of inhibiting side bud germination is better.

[0044] Effect Example 2: Effect of inhibiting the growth of kiwi fruit side branches

[0045] The same test field and the same dosing operation as in Effect Example 1 were used, and the kiwifruit lateral branch growth data were collected at the same time. Specifically, after dosing, the new shoots that had sprouted and grown from the fixed-point markers were measured to calculate the lateral branch growth rate. Side branch growth rate = {(new shoot length after treatment - new shoot length before treatment) / new shoot length before treatment} * 100%, and the results are shown in the following table:

[0046] Table 3. Test on the effect of lateral branch growth rate of Shaanxi Xuxiang kiwifruit

[0047]

[0048]

[0049] Table 4. Sichuan Donghong kiwifruit lateral branch growth rate effect test

[0050]

[0051]

[0052] Through the statistical data of the Xuxiang kiwifruit test sites in Shaanxi and the Donghong kiwifruit test sites in Sichuan, it can be seen that the treatment with indolebutyric acid at an effective concentration of 80 to 320 ppm and naphthylacetic acid at an effective concentration of 20 to 80 ppm can significantly reduce the growth rate of kiwifruit side branches, thereby reducing the nutritional growth consumption of the tree. The growth rates of kiwifruit side branches under the treatments of Example 2 and Example 3 are roughly equivalent, with no significant difference.

[0053] Figure 1 This is an overall picture of the Xuxiang kiwifruit treatment group after 50 days of using the pesticide formulation described in Example 2 of the present invention during the planting of Xuxiang kiwifruit in the experimental field of Nan Daping Village, Guangji Town, Zhouzhi County, Shaanxi Province, showing that the germination rate of the side buds of the fruiting branches is low. Figure 2 This is a detailed picture showing that the side buds of the fruiting branches have not yet sprouted. Figure 3 This is a detailed picture of the fruiting branches of the water control group under the same conditions in the same experimental field, showing that the lateral buds have sprouted. Figure 4 This is a detailed picture of the fruiting branches of the water control group under the same conditions in the same test field, showing that the side branches have been extended. It can be seen from the above pictures that the use of the agent of the present invention can significantly inhibit the germination of side buds and the growth of side branches of kiwifruit.

[0054] Effect Example 3 Inhibitor Safety Test

[0055] The same test field and the same dosing operation as in Effect Example 1 were used to observe with the naked eye whether the branches grew normally and the leaf color was normal after the treatment. The results are shown in the following table:

[0056] Table 5. Safety test of Shaanxi Xuxiang kiwifruit after medication

[0057]

[0058]

[0059] Table 6. Safety test of Sichuan Donghong kiwifruit after medication

[0060]

[0061]

[0062] According to the safety data statistics of the above-mentioned Xuxiang in Shaanxi and Donghong kiwifruit test sites in Sichuan, in terms of safety, the use of an effective concentration of 320ppm indolebutyric acid + 80ppm naphthaleneacetic acid has a slight safety hazard, causing the branches to bend and unable to fully recover, indicating that if the concentration is too high, although it will better inhibit the germination of lateral buds and branches of kiwifruit, it will also cause certain safety hazards to the growth of kiwifruit; after the use of an effective concentration of 160ppm indolebutyric acid + 40ppm naphthaleneacetic acid, the leaves drooped briefly and recovered in three days, which is safer. Taking the above into consideration, the present invention preferably uses an effective concentration of 160ppm indolebutyric acid + 40ppm naphthaleneacetic acid.

[0063] Effect Example 4: Growth of kiwifruit

[0064] As described in Example 1, the fruit growth of kiwifruit trees in the 10 experimental plots was measured at the same time. Determination of average single fruit weight: The fruits of the branches marked at each treatment point were harvested, and 100 fruits were randomly selected and weighed to calculate the average single fruit weight, which is the total weight of the fruit / the number of fruits. The results are shown in the following table:

[0065] Table 7. Average single fruit weight test of Shaanxi Xuxiang kiwifruit

[0066]

[0067]

[0068] Table 8. Average single fruit weight test of Sichuan Donghong kiwifruit

[0069]

[0070] According to the statistics of the average single fruit weight after the application of the drug in the above-mentioned Xuxiang in Shaanxi and Donghong kiwifruit test sites in Sichuan, the average single fruit weight of the treatments of Examples 1-3 is better than that of the water control. Among them, Example 2 is better than the other treatments as a whole. Considering comprehensively, the present invention preferably uses an effective concentration of 160ppm indolebutyric acid + 40ppm naphthaleneacetic acid.

[0071] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A plant growth regulator for inhibiting lateral buds and branches of kiwi fruit, characterized in that: The plant growth regulator comprises indolebutyric acid and naphthylacetic acid, the effective concentration of the indolebutyric acid is 80-320 ppm, and the effective concentration of the naphthylacetic acid is 20-80 ppm.

2. The plant growth regulator according to claim 1, characterized in that The effective concentration of the indolebutyric acid is 160-320 ppm, and the effective concentration of the naphthylacetic acid is 40-80 ppm.

3. The plant growth regulator according to claim 1, characterized in that The effective concentration of the indolebutyric acid is 160 ppm, and the effective concentration of the naphthylacetic acid is 40 ppm.

4. The plant growth regulator according to any one of claims 1 to 3, characterized in that The plant growth regulator also includes a pharmaceutically acceptable carrier, and the pharmaceutically acceptable carrier includes but is not limited to one or a combination of two or more of a solvent, a dispersant, a wetting agent, a moisturizing agent, a thickener, and a penetrant.

5. The plant growth regulator according to any one of claims 1 to 3, characterized in that The dosage form of the plant growth regulator includes but is not limited to any one of an aqueous solution, a soluble solution, a thermal mist, a soluble granule, a soluble powder, and a suspension.

6. A method for preparing a plant growth regulator, characterized in that: The method comprises fully mixing the indolebutyric acid and naphthylacetic acid described in any one of claims 1 to 3 with a pharmaceutically acceptable carrier.

7. Use of the plant growth regulator according to any one of claims 1 to 5 in inhibiting lateral buds and branches of kiwifruit.

8. The use according to claim 7, characterized in that: The plant growth regulator is applied during the budding stage of kiwifruit, when the inflorescence begins to separate, the length of the outer fruiting branch is about 20 cm, and the lateral buds have not yet sprouted. The drug is applied after pinching off 5-7 leaves above the flower buds at the top of the kiwifruit.

9. The use according to claim 7, characterized in that: The application amount of the plant growth regulator is 1 L / tree.

10. The use according to claim 7, characterized in that: The plant growth regulator is mainly applied to the upper and middle parts of the outer fruiting branches of kiwifruit.

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