An efficient method for preventing and treating eucalyptus dieback disease

Abstract

The present application relates to the technical field of planting, in particular to a high-efficiency prevention and treatment method for eucalyptus scorch disease, which comprises spraying fungicides on the leaves of eucalyptus and then spraying mixed fertilizer on the eucalyptus. First, 40% benzylpyrazole 2000 times is used as a fungicide to sterilize the leaves of eucalyptus, which can effectively prevent and treat various diseases. In combination with the use of an additive, it can consolidate the prevention and treatment effect, avoid drug resistance of eucalyptus and reduce the side effects of fungicides. Then, mixed fertilizer is sprayed. Through the above combination, eucalyptus scorch disease can be treated from the root, and the leaves of the diseased tree turn from yellow to green after one month, and the tree returns to normal growth.

Description

Technical Field

[0001] This invention relates to the field of planting technology, and in particular to a highly efficient method for the prevention and control of eucalyptus scorch disease. Background Technology

[0002] Eucalyptus trees are valued for their rapid growth, high yield, wide range of uses, and short rotation period.

[0003] Eucalyptus scorch, a globally prevalent soil-borne disease, severely impacts the normal growth and timber production of eucalyptus trees, posing a significant threat to forestry economic development. Currently, reports indicate that eucalyptus scorch has occurred in Guangxi Zhuang Autonomous Region, Fujian Province, Hainan Province, Sichuan Province, and other regions, covering a wide area.

[0004] Based on this, after years of research, the applicant has proposed a highly effective prevention and control method for eucalyptus scorch disease, and this application has come into being. Summary of the Invention

[0005] In view of the above, it is necessary to provide a highly effective prevention and control method for eucalyptus scorch disease that can treat the disease at its root.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A highly effective method for controlling eucalyptus scorch disease, comprising spraying a fungicide on the leaves of eucalyptus trees and then spraying an adjuvant 2-3 days after spraying the fungicide; the adjuvant is mainly composed of the following raw materials in parts by weight: 5-12 parts pyrethrum, 4-9 parts sage, 3-8 parts licorice root, and 2-4 parts dandelion.

[0008] Furthermore, the method also includes spraying a mixed fertilizer onto the eucalyptus leaves one week after spraying the leaves with the adjuvant.

[0009] Furthermore, the bactericide is 40% benzoylpyrazole ester at a concentration of 2000 times.

[0010] Furthermore, the adjuvant is obtained by ethanol extraction of pyrethrum, sage, licorice root and dandelion respectively, followed by mixing, filtration and concentration.

[0011] Furthermore, the mixed fertilizer is composed of the following raw materials in parts by weight: 3-5 parts potassium fertilizer, 4-6 parts nitrogen fertilizer, 3-4 parts phosphate fertilizer, 2-4 parts sodium nitrophenolate, 3-5 parts banana juice, and 1-2 parts gibberellin.

[0012] Furthermore, the banana juice is obtained by the following method: collecting ripe banana fruits with peels, mixing the banana fruits with peels and hot water at 75°C to make juice, then adding sodium citrate at 0.3% of the weight of the banana fruits with peels, mixing and reacting for 3-5 minutes to obtain banana juice.

[0013] The present invention has at least the following beneficial effects:

[0014] 1. This application describes a highly effective control method for eucalyptus scorch disease, which involves spraying eucalyptus leaves with a 40% benzoylpyrazole solution diluted 2000 times. Benzylpyrazole, as a broad-spectrum fungicide, can effectively protect against various diseases and improve crop resistance to pathogens. However, in actual control practice, the applicant found that the effect of benzoylpyrazole treatment is not ideal if the plant is already infected with scorch disease. This fungicide is primarily preventative, with poor therapeutic effects. Moreover, it only shows good results in the early stages; in later stages, the dosage needs to be increased to maintain effectiveness. However, excessive dosage can cause phytotoxicity, leading to leaf drop and inhibited eucalyptus growth. Therefore, the applicant supplements the treatment with an adjuvant 2-3 days after spraying benzoylpyrazole. With the help of the adjuvant, eucalyptus scorch disease can be better treated, and the side effects of benzoylpyrazole can be effectively reduced, avoiding a series of phytotoxic phenomena and treating eucalyptus scorch disease from the root.

[0015] 2. After treating the eucalyptus trees with a fungicide and adjuvants, the applicant sprayed a mixed fertilizer one week later. The mixed fertilizer can supplement the nutrients required for the growth of eucalyptus trees. After the fungicide was sprayed, the applicant found that the eucalyptus trees had a greater demand for growth nutrients. If the appropriate nutrients could not be supplemented in a timely and effective manner, problems such as slow growth and leaf drop would occur. The mixed fertilizer of this application includes banana juice. The applicant found that adding banana juice prepared by the method of this application to the mixed fertilizer can effectively improve the leaf drop problem. Attached Figure Description

[0016] Figure 1 A schematic diagram illustrating the damage caused by eucalyptus seedlings to scorch disease;

[0017] Figure 2 One month after processing according to the implementation method of this application Figure 1 A schematic diagram illustrating the processing effect in a scenario;

[0018] Figure 3 This is a schematic diagram illustrating the damage caused by scorch disease to a 4.5-year-old eucalyptus forest.

[0019] Figure 4 One month after processing according to the implementation method of this application Figure 3 The processing effect is illustrated in the scene diagram. Detailed Implementation

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Unless otherwise stated, each feature disclosed in this specification (including any appended claims and abstract) is merely one example of a series of equivalent or similar features.

[0022] Example 1:

[0023] This embodiment provides a highly effective method for controlling eucalyptus scorch disease, which includes the following steps:

[0024] (1) Spraying fungicide: Spray fungicide on the leaves of eucalyptus leaves. The fungicide is 40% benzyl pyrazole ester diluted 2000 times.

[0025] (2) Spraying adjuvant: Two days after spraying the fungicide, spray the adjuvant again; the adjuvant is mainly composed of the following raw materials in parts by weight: 5 parts pyrethrum, 4 parts sage, 3 parts licorice root and 2 parts dandelion; the adjuvant is obtained by ethanol extraction of pyrethrum, sage, licorice root and dandelion respectively, followed by mixing, filtration and concentration.

[0026] (3) Foliar fertilizer application: One week after spraying the eucalyptus leaves with the adjuvant, a mixed fertilizer is sprayed on the eucalyptus leaves; the mixed fertilizer is composed of the following raw materials in parts by weight: 3 parts potassium fertilizer, 4 parts nitrogen fertilizer, 3 parts phosphorus fertilizer, 2 parts sodium nitrophenolate, 3 parts banana juice and 1 part gibberellin; the banana juice is obtained by the following method: collecting mature banana fruits with peel, mixing the banana fruits with peel with hot water at 75°C to make juice, then adding sodium citrate accounting for 0.3% of the weight of the banana fruits with peel, mixing and reacting for 3 minutes to obtain banana juice.

[0027] All of the above were carried out using drones for spraying.

[0028] Example 2:

[0029] This embodiment provides a highly effective method for controlling eucalyptus scorch disease, which includes the following steps:

[0030] (1) Spraying fungicide: Spray fungicide on the leaves of eucalyptus leaves. The fungicide is 40% benzyl pyrazole ester diluted 2000 times.

[0031] (2) Spraying adjuvant: Two days after spraying the fungicide, spray the adjuvant again; the adjuvant is mainly composed of the following raw materials in parts by weight: 9 parts pyrethrum, 6 parts sage, 6 parts licorice root and 3 parts dandelion; the adjuvant is obtained by ethanol extraction of pyrethrum, sage, licorice root and dandelion respectively, followed by mixing, filtration and concentration.

[0032] (3) Foliar fertilizer application: One week after spraying the eucalyptus leaves with the adjuvant, a mixed fertilizer is sprayed on the eucalyptus leaves; the mixed fertilizer is composed of the following raw materials in parts by weight: 4 parts potassium fertilizer, 5 parts nitrogen fertilizer, 3 parts phosphorus fertilizer, 3 parts sodium nitrophenolate, 4 parts banana juice and 2 parts gibberellin; the banana juice is obtained by collecting mature banana fruits with peel, mixing the banana fruits with peel with hot water at 75°C to make juice, then adding sodium citrate accounting for 0.3% of the weight of the banana fruits with peel, mixing and reacting for 4 minutes to obtain banana juice.

[0033] All of the above were carried out using drones for spraying.

[0034] Example 3:

[0035] This embodiment provides a highly effective method for controlling eucalyptus scorch disease, which includes the following steps:

[0036] (1) Spraying fungicide: Spray fungicide on the leaves of eucalyptus leaves. The fungicide is 40% benzyl pyrazole ester diluted 2000 times.

[0037] (2) Spraying adjuvant: Three days after spraying the fungicide, spray the adjuvant again; the adjuvant is mainly composed of the following raw materials in parts by weight: 12 parts pyrethrum, 9 parts sage, 8 parts licorice root and 4 parts dandelion; the adjuvant is obtained by ethanol extraction of pyrethrum, sage, licorice root and dandelion respectively, followed by mixing, filtration and concentration.

[0038] (3) Foliar fertilizer application: One week after spraying the eucalyptus leaves with the adjuvant, a mixed fertilizer is sprayed on the eucalyptus leaves; the mixed fertilizer is composed of the following raw materials in parts by weight: 5 parts potassium fertilizer, 6 parts nitrogen fertilizer, 4 parts phosphorus fertilizer, 4 parts sodium nitrophenolate, 5 parts banana juice and 2 parts gibberellin; the banana juice is obtained by the following method: collecting mature banana fruits with peel, mixing the banana fruits with peel with hot water at 75°C to make juice, then adding sodium citrate accounting for 0.3% of the weight of the banana fruits with peel, mixing and reacting for 5 minutes to obtain banana juice.

[0039] All of the above were carried out using drones for spraying.

[0040] Experimental example:

[0041] To illustrate the practical value of this application, the applicant compared the cultivation effects under different treatment groups, as follows:

[0042] Group 1: The prevention and control method described in Example 2;

[0043] Group 2: Remove the treatment step of spraying adjuvants; other methods are the same as Group 1.

[0044] Group 3: The adjuvants for spraying were changed to 5 parts pyrethrum, 4 parts coptis chinensis, 3 parts isatis indigotica and 2 parts artemisia argyi, and the other methods were the same as Group 1;

[0045] Group 4: Remove the banana juice from the mixed fertilizer; otherwise, follow the same steps as Group 1.

[0046] Group 5: The preparation method of banana juice is as follows: collect ripe banana fruits, peel off the outer skin and take out the pulp, mix the pulp with hot water at 75℃ and blend it into juice, then add sodium citrate at 0.3% of the weight of the bananas with peel, mix and react for 4 minutes to obtain banana juice; other methods are the same as Group 1.

[0047] Group 6: The method for preparing banana juice is as follows: collect ripe banana fruits with peels, mix the banana fruits with 75℃ hot water and blend them into juice to obtain banana juice; other methods are the same as Group 1.

[0048] The applicant treated eucalyptus seedlings for scorch disease according to the methods described in the above groups, and compared the disease severity and control effects after treatment with each group. The defoliation rate after treatment with each group's method was also compared. The results are shown in Table 1.

[0049] Table 1 Comparison of prevention and control effects among different groups

[0050] Disease severity index (%) Prevention and control efficacy (%) Leaf fall rate (%) Group 1 2.5 90.8 8.5 Group 2 26.3 8.2 8.1 Group 3 8.3 76.9 8.2 Group 4 3.1 88.7 38.3 Group 5 2.8 89.6 26.4 Group 6 2.6 90.1 24.5

[0051] According to the results in Table 1, the control method proposed in this application can effectively treat eucalyptus wilt. However, the control effect was significantly reduced in the third group after removing the spray adjuvant and after changing the spray adjuvant. The spray adjuvant used in the third group is also a traditional Chinese medicine ingredient with bactericidal effect, but it cannot achieve the effect of this application. This indicates that the composition of the adjuvant in this application is not simply a selection of bactericidal traditional Chinese medicine, but the effect of compounding is the key to this application. The fourth group, after removing the banana juice from the mixed fertilizer, experienced more serious leaf drop problems, indicating that the banana juice of this application can effectively solve the leaf drop problem in the process of controlling eucalyptus wilt. The results of the fifth and sixth groups also show that the banana juice prepared by peeling or removing the sodium citrate treatment in this application could not achieve the corresponding effect. It can be seen that this application also proposes a method for preparing banana juice, which can effectively improve the leaf drop problem that occurs during the storage of eucalyptus wilt, and has outstanding significance.

[0052] In addition, the applicant collected data on the growth of eucalyptus trees before and after treatment with the control methods described in this application, such as... Figure 1 A schematic diagram illustrating the damage caused by eucalyptus seedlings to scorch disease; Figure 2 One month after processing according to the implementation method of this application Figure 1 A schematic diagram illustrating the processing effect in a scenario; Figure 3 This is a schematic diagram illustrating the damage caused by scorch disease to a 4.5-year-old eucalyptus forest. Figure 4 One month after processing according to the implementation method of this application Figure 3The accompanying diagram illustrates the treatment effect. As can be seen from the comparison of the attached figures, the control method described in this application can effectively treat eucalyptus scorch disease, and it shows good treatment results in both eucalyptus seedlings and mature trees. This method is worth promoting in the market.

[0053] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A highly effective method for preventing and treating Oomycete diseases of Eucalyptus, characterized by, The prevention method comprises spraying fungicide on the eucalyptus leaves, and spraying the auxiliary agent 2-3 days after the spraying of the fungicide; the auxiliary agent is mainly composed of the following raw materials in parts by weight: pyrethrum 5-12 parts, sage 4-9 parts, licorice root 3-8 parts, and dandelion 2-4 parts; The method further comprises spraying the mixed fertilizer on the eucalyptus leaves one week after spraying the auxiliary agent on the eucalyptus leaves; the mixed fertilizer is composed of the following raw materials in parts by weight: potassium fertilizer 3-5 parts, nitrogen fertilizer 4-6 parts, phosphorus fertilizer 3-4 parts, complex sodium nitrophenol 2-4 parts, banana juice 3-5 parts, and gibberellin 1-2 parts; the banana juice is obtained by the following method: collecting ripe banana fruits with peels, mixing the banana fruits with peels with hot water at 75 DEG C to beat into juice, then adding 0.3% sodium citrate based on the mass of the banana fruits with peels, and mixing for 3-5 min to obtain the banana juice.

2. The method of claim 1, wherein, The fungicide is 40% benzylpyrazole 2000 times.

3. The method of claim 1, wherein, The auxiliary agent is obtained by separately subjecting pyrethrum, sage, licorice root, and dandelion to ethanol extraction, mixing, filtering, and concentrating.

Images