Composition for inhibiting flowering of photinia serrulata and application thereof

Abstract

The invention relates to the technical field of forest control, in particular to a composition for inhibiting flowering of photinia serrulata and application of the composition. The effective components of the composition comprise naphthylacetic acid, paclobutrazol. Mepiquat chloride and a macroelement fertilizer, and the mass ratio of the naphthylacetic acid to the paclobutrazol. Mepiquat chloride to the macroelement fertilizer is (1.25-5): (1.5-6): (2.5-10). When the composition is applied to the photinia serrulata, leaves can be protected and release of amine compounds such as trimethylamine can be reduced while flowering of flower buds of the photinia serrulata can be inhibited, so that the purposes of reducing pollution of the amine compounds such as trimethylamine to air and reducing human allergens are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of forest pest control, and specifically relates to a composition for inhibiting the flowering of Photinia serratifolia and its application. Background Art

[0002] Photinia serratifolia is an evergreen tree of the genus Photinia in the Rosaceae family, 5 - 12 meters tall, with a compact plant type and a spherical crown. The branches are brownish - gray; the scales are brown and hairless; the leaves are leathery, oblong - elliptic to obovate - elliptic laterally, with serrations, and the new leaves are red and shiny. It has a compound corymbose inflorescence with small white flowers. The flowering period is from April to May, the berries are red, and the fruit - ripening period is in October. It grows vigorously, has a wide adaptability, strong sprouting ability, is extremely resistant to pruning, and after pruning, the red - leaf period of the new shoots can last for 4 - 8 weeks, and the fruit - viewing period can last until winter. Photinia serratifolia is widely used in landscaping. However, when it blooms, the flowers will emit amine compounds such as trimethylamine. The smell of amine compounds such as trimethylamine is very unpleasant, a kind of fishy smell, which can cause adverse reactions in many people, such as nausea, vomiting, allergies and other symptoms. Moreover, Photinia serratifolia has a large amount of flowers, and flowering will also consume a large amount of tree body nutrients. After the flowers wither, the fruit - setting amount is also large. A large amount of flowering and fruiting leads to yellowing of the plants, premature leaf - falling, etc., which is not conducive to the growth of plants. Therefore, in many greening management units such as parks, communities, and streets, corresponding measures will be taken to control the flowering of Photinia serratifolia.

[0003] Currently, most of the measures are to spray the flowers with a high - pressure water gun during the flowering period to wash away the flowers. However, this method has extremely poor effects. First, after the flowers bloom, they will release amine compounds such as trimethylamine, and water flushing cannot absorb the smell. Second, high - pressure water gun flushing will also wash away the leaves, damaging the green plants. Third, the flushing is not thorough and cannot quickly wash away most of the flowers. Fourth, the flushing operation speed is slow and the efficiency is low. Fifth, the workers may also be allergic to this flower, causing physical discomfort. Summary of the Invention

[0004] In order to solve the defects existing in the prior art, the present invention provides a composition for inhibiting the flowering of Photinia serratifolia and its application. When the composition of the present invention is applied to Photinia serratifolia, it can inhibit the flowering of Photinia serratifolia flower buds while protecting the leaves, reducing the release of "amine compounds such as trimethylamine", so as to achieve the purpose of reducing the pollution of "amine compounds such as trimethylamine" to the air and reducing human allergens.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides a composition for inhibiting the flowering of Photinia serratifolia, and the active ingredients of the composition include naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer. The mass ratio of naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer is (1.25 - 5):(1.5 - 6):(2.5 - 10).

[0007] In some embodiments of the present invention, the mass ratio of naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer is any one or a value between any two of 1.25:1.5:2.5, 2.5:3:5, 3.75:4.5:7.5, and 5:6:10.

[0008] Preferably, the mass ratio of naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer is 3.75:4.5:7.5.

[0009] Preferably, the mass ratio of paclobutrazol to mepiquat chloride in the paclobutrazol·mepiquat chloride is 5:1.

[0010] Preferably, the macronutrient fertilizer contains a nitrogen source, a phosphorus source, and a potassium source.

[0011] Preferably, in the macronutrient fertilizer, N + P 2 O 5 + K 2 O ≥ 500 g / L.

[0012] The active ingredients in the composition of the present invention can be compounded by commercially purchasing the active ingredients, or the preparation containing the active ingredients can be directly purchased for compounding.

[0013] In a second aspect, the present invention provides a pesticide preparation for inhibiting the flowering of Photinia serratifolia, and the pesticide preparation includes the above composition.

[0014] Preferably, the dosage form of the pesticide preparation is selected from any one of emulsifiable concentrate, microemulsion, aqueous emulsion, suspension concentrate, oil suspension concentrate, dry suspension concentrate, wettable powder, or water dispersible granule.

[0015] In a third aspect, the present invention provides an application of the above composition or pesticide preparation in inhibiting the flowering of Photinia serratifolia.

[0016] Preferably, the composition or pesticide preparation is applied in the initial stage of Photinia serratifolia flower buds (around the end of March to the middle and upper ten days of April every year).

[0017] Preferably, the composition or pesticide preparation is applied to the flower buds and the tree crown of Photinia serratifolia.

[0018] Preferably, the application is to apply the composition or pesticide preparation once a year.

[0019] The beneficial effects of the present invention are:

[0020] Most of the existing technologies use plant regulators to delay the flowering time. However, the composition of the present invention protects the leaves while inhibiting the continued growth of Photinia serrulata flower buds and causing the flower buds to wither and die, and the flower buds will not open again later. The present invention combines paclobutrazol·mepiquat chloride, naphthalene acetic acid, and a water-soluble fertilizer containing macronutrients. Each component complements each other. Paclobutrazol·mepiquat chloride can inhibit the synthesis of gibberellic acid and prevent the continued growth and development of Photinia serrulata flower buds. Among them, mepiquat chloride inhibits the formation of ent-kaurene, the precursor of gibberellin, and paclobutrazol inhibits the synthesis of gibberellin (GA) by inhibiting ent-kaurene oxidase (KO); naphthalene acetic acid stimulates the expression of ACC synthase, the precursor of ethylene synthesis, by activating the auxin signaling pathway, promoting ethylene biosynthesis. Ethylene promotes the blockage of the vascular bundles at the base of the flower (such as callose deposition), blocks the transport of water and nutrients, and accelerates the death of the flower; in the water-soluble fertilizer containing macronutrients, by inhibiting the 2 activity of ferric reductase, the 2+ availability of Fe is reduced,

[0021] hindering the synthesis of chlorophyll porphyrin ring, hindering the plant from providing nutrients for flower buds, and inhibiting the growth of flower buds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 are the on-site pictures during and after the application of the medicine in Example 3;

[0023] Figure 2 are the on-site pictures during and after the application of the medicine in Example 4;

[0024] Figure 3 are the on-site pictures during and after the application of the medicine in Comparative Example 1;

[0025] Figure 4 are the on-site pictures during and after the application of the medicine in Comparative Example 2;

[0026] Figure 5 is the on-site picture of Photinia serrulata without applying the medicine. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the invention, the present invention will be further described in detail below in conjunction with the specific embodiments.

[0028] Example 1

[0029] The active ingredients of the pesticide composition provided in this example are: naphthalene acetic acid, paclobutrazol·mepiquat chloride, and a macronutrient fertilizer (N + P 2 O 5 + K 2O ≥ 500 g / L), and their mass ratio is 1.25:1.5:2.5. The mass ratio of paclobutrazol to mepiquat chloride in paclobutrazol·mepiquat chloride is 5:1.

[0030] Preparation of the medicament: Take 25 g of naphthaleneacetic acid with a mass concentration of 5%, 5 g of paclobutrazol·mepiquat chloride with a mass concentration of 30%, and 5 g of water-soluble fertilizer for macronutrients (the content of macronutrient fertilizer is 50%, N + P 2 O 5 +K 2 O ≥ 500 g / L), mix them evenly, and add water to make up to 15 L.

[0031] Application of the medicament: Spray the prepared medicament on the flower buds and tree crowns of Photinia serratifolia in the initial stage of flower buds (around the end of March to the middle and upper ten days of April every year). Spray only once a year, and it is appropriate to spray until dripping. The spraying amount is 45 - 60 kg of liquid medicine per mu. The effects are shown in Table 1.

[0032] Table 1

[0033]

[0034] It can be seen that after the composition used in this example is applied to Photinia serratifolia, the leaves are normal, the continued growth of the flower buds of Photinia serratifolia can be inhibited, and the flower buds will wither and die, and the flower buds will no longer open in the later stage. The effect of inhibiting flowering is obvious.

[0035] Example 2

[0036] The active ingredients of the pesticide composition provided in this example are: naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer (N + P 2 O 5 +K 2 O ≥ 500 g / L), and their mass ratio is 2.5:3:5. The mass ratio of paclobutrazol to mepiquat chloride in paclobutrazol·mepiquat chloride is 5:1.

[0037] Preparation of the medicament: Take 50 g of naphthaleneacetic acid with a mass concentration of 5%, 10 g of paclobutrazol·mepiquat chloride with a mass concentration of 30%, and 10 g of water-soluble fertilizer for macronutrients (the content of macronutrient fertilizer is 50%, N + P 2 O 5 +K 2 O ≥ 500 g / L), mix them evenly, and add water to make up to 15 L.

[0038] Application of the medicament: Directly spray the prepared medicament on the flower buds and tree crowns of Photinia serratifolia in the initial stage of flower buds (around the end of March to the middle and upper ten days of April every year). Spray only once a year, and it is appropriate to spray until dripping. The spraying amount is 45 - 60 kg of liquid medicine per mu. The effects are shown in Table 2.

[0039] Table 2

[0040]

[0041] It can be seen that after the composition used in this example is applied to Photinia serratifolia, the leaves are normal, the continued growth of the flower buds of Photinia serratifolia can be inhibited, and the flower buds will wither and die, and the flower buds will no longer bloom in the later stage, and the effect of inhibiting flowering is obvious.

[0042] Example 3

[0043] The active ingredients of the pesticide composition provided in this example are: naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer (N+P 2 O 5 +K 2 O≥500 g / L), and their mass ratio is 3.75:4.5:7.5. The mass ratio of paclobutrazol to mepiquat chloride in paclobutrazol·mepiquat chloride is 5:1.

[0044] Preparation of the medicament: Take 75 g of naphthaleneacetic acid with a mass concentration of 5%, 15 g of paclobutrazol·mepiquat chloride with a mass concentration of 30%, and 15 g of macronutrient water-soluble fertilizer (the content of macronutrient fertilizer is 50%, N+P 2 O 5 +K 2 O≥500 g / L), mix evenly, and add water to 15 L.

[0045] Application of the medicament: At the initial stage of the flower buds of Photinia serratifolia (around the end of March to the middle and upper ten days of April every year), directly spray the prepared medicament on the flower buds and the tree crown of Photinia serratifolia. Spray only once a year, and it is appropriate to spray until dripping wet. The spraying amount is 45-60 kg of liquid medicine per mu. The corresponding on-site diagram is shown in Figure 1 .

[0046] Table 3

[0047]

[0048] It can be seen that after the composition used in this example is applied to Photinia serratifolia, the leaves are normal, the continued growth of the flower buds of Photinia serratifolia can be inhibited, and the flower buds will wither and die, and the flower buds will no longer bloom in the later stage, and the effect of inhibiting flowering is obvious.

[0049] Example 4

[0050] The active ingredients of the pesticide composition provided in this example are: naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer (N+P 2 O 5 +K 2 O≥500 g / L), and their mass ratio is 5:6:10. The mass ratio of paclobutrazol to mepiquat chloride in paclobutrazol·mepiquat chloride is 5:1.

[0051] Preparation of the medicament: Take 100 g of naphthaleneacetic acid with a mass concentration of 5%, 20 g of paclobutrazol·mepiquat chloride with a mass concentration of 30%, and 20 g of macronutrient water-soluble fertilizer (the content of macronutrient fertilizer is 50%, N+P2 O 5 +K 2 O ≥ 500 g / L), mix evenly, and add water to 15 L.

[0052] Application of the medicament: At the initial stage of Photinia serratifolia buds (around the end of March to the first and middle ten days of April every year), directly spray the prepared medicament on the Photinia serratifolia buds and the tree crown. Spray only once a year, and it is appropriate to spray until dripping. The spraying amount is 45 - 60 kg of liquid medicine per mu. The effects are shown in Table 4, and the corresponding on-site pictures are shown in Figure 2 .

[0053] Table 4

[0054]

[0055] It can be seen that after the composition used in this example is applied to Photinia serratifolia, there are some abnormalities in the leaves in the short term, and the leaves are normal in the later stage. The effect of inhibiting flowering is obvious.

[0056] Comparative Example 1

[0057] The active ingredients of the pesticide composition provided in this comparative example are: naphthaleneacetic acid, paclobutrazol·mepiquat chloride, and macronutrient fertilizer (N + P 2 O 5 +K 2 O ≥ 500 g / L), and their mass ratio is 7.5:9:15. The mass ratio of paclobutrazol to mepiquat chloride in paclobutrazol·mepiquat chloride is 5:1.

[0058] Preparation of the medicament: Take 150 g of naphthaleneacetic acid with a mass concentration of 5%, 30 g of paclobutrazol·mepiquat chloride with a mass concentration of 30%, and 30 g of water-soluble macronutrient fertilizer (the content of macronutrient fertilizer is 50%, N + P 2 O 5 +K 2 O ≥ 500 g / L), mix evenly, and add water to 15 L.

[0059] Application of the medicament: At the initial stage of Photinia serratifolia buds (around the end of March to the first and middle ten days of April every year), directly spray the prepared medicament on the Photinia serratifolia buds and the tree crown. Spray only once a year, and it is appropriate to spray until dripping. The spraying amount is 45 - 60 kg of liquid medicine per mu. The effects are shown in Table 5, and the corresponding on-site pictures are shown in Figure 3 .

[0060] Table 5

[0061]

[0062] It can be seen that after the composition used in this comparative example is applied to Photinia serratifolia, although the effect of inhibiting flowering is obvious, it will cause leaf abnormalities, indicating that when the composition ratio used exceeds the limit range of the present invention, it is easy to cause leaf abnormalities and is not suitable for use.

[0063] Comparative Example 2

[0064] The active ingredients of the pesticide composition provided in this comparative example are: naphthalene acetic acid, mepiquat chloride, and macronutrient fertilizer (N + P 2 O 5 + K 2 O ≥ 500 g / L), and their mass ratio is 3.75:0.75:7.5.

[0065] Preparation of the medicament: Take 75 g of naphthalene acetic acid with a mass concentration of 5%, 7.5 g of mepiquat chloride with a mass concentration of 10%, and 15 g of macronutrient water-soluble fertilizer (the content of macronutrient fertilizer is 50%, N + P 2 O 5 + K 2 O ≥ 500 g / L), mix them evenly, and add water to make up to 15 L.

[0066] Application of the medicament: At the initial stage of Photinia serratifolia flower buds (around the end of March to the first and middle ten days of April every year), directly spray the prepared medicament on the flower buds and tree crowns of Photinia serratifolia. Spray only once a year, and it is appropriate to spray until dripping. The spraying amount is 45 - 60 kg of liquid medicine per mu. The results are shown in Table 6, and the corresponding on-site pictures are shown in Figure 4 .

[0067] Table 6

[0068]

[0069]

[0070] It can be seen that after the composition used in this comparative example was applied to Photinia serratifolia, it caused obvious abnormalities in the leaves and had a poor effect on inhibiting flowering.

[0071] The on-site picture of Photinia serratifolia without applying any medicament is shown in Figure 5 , and it can be seen that after a period of time, the flowers bloom luxuriantly. It shows that the composition with the defined ratio in the present invention can protect the leaves while significantly inhibiting the flowering of Photinia serratifolia, achieving the purpose of reducing the release of "amine compounds such as trimethylamine", thereby reducing the air pollution caused by "amine compounds such as trimethylamine" and reducing human allergens.

[0072] The above are only the preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as a limitation to the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art, without departing from the spirit and scope of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A composition for inhibiting flowering of Photinia serrulata, characterized in that: The effective components of the composition include naphthylacetic acid, paclobutrazol·mepirac-chloride and macronutrient fertilizer, and the mass ratio of the naphthylacetic acid, paclobutrazol·mepirac-chloride and macronutrient fertilizer is (1.25-5): (1.5-6): (2.5-10).

2. The composition according to claim 1, characterized in that The mass ratio of paclobutrazol to mepiquat in the paclobutrazol·mepiquat is 5:

1.

3. The composition according to claim 1 or 2, characterized in that The macronutrient fertilizer contains a nitrogen source, a phosphorus source and a potassium source.

4. The composition according to claim 3, characterized in that The content of N+P2O5+K2O in the macro-element fertilizer is ≥500g / L.

5. A pesticide preparation for inhibiting flowering of Photinia serrulata, characterized in that: The pesticide preparation comprises the composition according to any one of claims 1 to 4.

6. The pesticide formulation according to claim 5, characterized in that: The dosage form of the pesticide preparation is selected from any one of emulsifiable concentrate, microemulsion, aqueous emulsion, suspension, oil suspension, dry suspension, wettable powder or water dispersible granules.

7. Use of the composition according to any one of claims 1 to 4 or the pesticide preparation according to any one of claims 5 to 6 in inhibiting the flowering of Photinia fraseri.

8. The use according to claim 7, characterized in that: The composition or pesticide preparation is applied to the early stage of heather buds.

9. The use according to claim 7, characterized in that: The composition or pesticide preparation is applied to heather flower buds and tree crowns.

10. The use according to claim 7, characterized in that: The composition or pesticide formulation is applied once a year.

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