Biopesticide for efficiently preventing and treating asparagus stem blight and preparation method thereof

Abstract

The invention discloses a biopesticide for efficiently preventing and treating asparagus stem blight. Comprising the following raw materials in parts by weight: 5-10 parts of carbendazim, 3-6 parts of mancozeb, 5-8 parts of chlorothalonil, 1-5 parts of benlyte missible oil, 1-4 parts of Bordeaux mixture, 2-5 parts of bacteriostat, 150-200 parts of water, 20-30 parts of radix isatidis, 15-25 parts of coptis chinensis, 25-30 parts of purslane, 10-15 parts of dandelion, 10-15 parts of folium isatidis, 5-10 parts of fructus amomi and 8-15 parts of fennel. An extracting solution B extracted from Chinese herbal medicines including radix isatidis, rhizoma coptidis, herba portulacae, herba taraxaci, folium isatidis, fructus amomi and fennel is added into chemical agents including carbendazim, mancozeb, chlorothalonil, benomyl missible oil, Bordeaux mixture and bacteriostat, so that the biopesticide for efficiently preventing and treating the asparagus stem blight is finally obtained. The biological pesticide for efficiently preventing and treating the asparagus stem blight avoids the situation that the prevention and treatment effect on the asparagus stem blight is reduced due to the fact that only chemical agents are used for a long time, and experimental data show that the prepared biological pesticide for efficiently preventing and treating the asparagus stem blight can effectively and efficiently prevent and treat the asparagus stem blight.

Description

Technical Field

[0001] The invention relates to the technical field of preventing and treating asparagus stem blight, in particular to a biological pesticide for effectively preventing and treating asparagus stem blight and a preparation method thereof. Background Art

[0002] Asparagus, also known as Asparagus officinalis, is a perennial herb of the genus Asparagus in the Asparagaceae family. Its young shoots can be used as vegetables, and it is known as the "king of vegetables" in the international market. Asparagus has high nutritional value, can moisten the lungs, relieve cough, and eliminate phlegm, and has the function of inhibiting tumor growth. It is deeply loved by people. In recent years, with the expansion of asparagus cultivation area, the occurrence of diseases has become more serious year by year, especially the occurrence and harm of stem blight have seriously affected the yield and quality of asparagus.

[0003] The pathogen of asparagus stem blight is Phomopsis asparagus, a devastating disease distributed worldwide. The disease spreads rapidly under rainy and windy conditions and can also be transmitted by rain splashing. Air transmission is the main cause of large-scale disease. The direction of spread in the field and the rapidity of onset are often affected by wind. In addition, low-lying terrain, heavy soil, and excessive nitrogen fertilizer can easily aggravate the onset of the disease. In mild cases, it leads to poor growth and development of asparagus, reduced yield and quality. In severe cases, the diseased plants die prematurely and the entire field is destroyed.

[0004] At present, the prevention and control of asparagus stem blight mainly relies on the use of chemical agents. Long-term use will greatly reduce the prevention and control effect of asparagus stem blight, which is not conducive to the efficient prevention and control of asparagus stem blight, thereby affecting the healthy growth of asparagus. Therefore, a biological pesticide that can effectively prevent and control asparagus stem blight is urgently needed to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a biological pesticide for effectively preventing and treating asparagus stem blight and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

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

[0007] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 5-10 parts of carbendazim, 3-6 parts of mancozeb, 5-8 parts of thiophanate-methyl, 1-5 parts of benlate emulsifiable concentrate, 1-4 parts of Bordeaux mixture, 2-5 parts of antibacterial net, 150-200 parts of water, 20-30 parts of isatis root, 15-25 parts of coptis root, 25-30 parts of purslane, 10-15 parts of dandelion, 10-15 parts of isatis indigotica leaf, 5-10 parts of amomum villosum and 8-15 parts of fennel.

[0008] As a further scheme of the present invention, the invention comprises the following raw materials in parts by weight: 7-10 parts of carbendazim, 4-6 parts of mancozeb, 5-7 parts of thiophanate-methyl, 1-3 parts of benlate emulsifiable concentrate, 2-4 parts of Bordeaux mixture, 3-5 parts of antibacterial net, 160-200 parts of water, 22-30 parts of isatis root, 18-25 parts of coptis root, 26-30 parts of purslane, 10-14 parts of dandelion, 11-15 parts of isatis indigotica, 7-10 parts of amomum villosum, and 10-15 parts of fennel.

[0009] As a further scheme of the present invention, the following raw materials are included in parts by weight: 9 parts of carbendazim, 5 parts of mancozeb, 6 parts of thiophanate-methyl, 2 parts of benlate emulsifiable concentrate, 3 parts of Bordeaux mixture, 4 parts of antibacterial net, 180 parts of water, 26 parts of isatis root, 21 parts of coptis root, 28 parts of purslane, 12 parts of dandelion, 13 parts of isatis indigotica, 9 parts of amomum, and 12 parts of fennel.

[0010] A method for preparing a biological pesticide for efficiently preventing and controlling asparagus stem blight comprises the following steps:

[0011] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0012] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0013] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0014] As a further solution of the present invention: in S1 and S2, the amount of water added is 50% of the total water.

[0015] As a further solution of the present invention: in S2, the extracted drug residue is filtered and subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0016] As a further solution of the present invention: in S2, the temperature of the low-fire cooking is 50-60° C., and the duration of the low-fire cooking is 20-30 minutes.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The invention adds an extract B extracted from Chinese herbal medicines Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi and Fennel into the chemical agents carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture and antibacterial net, thereby finally obtaining a biological pesticide for effectively preventing and treating asparagus stem blight, avoiding the long-term use of chemical agents to reduce the prevention and treatment effect of asparagus stem blight. Experimental data show that the biological pesticide for effectively preventing and treating asparagus stem blight prepared by the invention can effectively prevent and treat asparagus stem blight, greatly increases the prevention and treatment effect of asparagus stem blight, is conducive to the healthy growth of asparagus and is conducive to practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The process flow chart of the preparation method of the biological pesticide for effectively preventing and controlling asparagus stem blight. DETAILED DESCRIPTION

[0020] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0021] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0022] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0023] Embodiment 1

[0024] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 5 parts of carbendazim, 3 parts of mancozeb, 5 parts of chlorothalonil, 1 part of benlate emulsifiable concentrate, 1 part of Bordeaux mixture, 2 parts of antibacterial net, 150 parts of water, 20 parts of isatis root, 15 parts of coptis root, 25 parts of purslane, 10 parts of dandelion, 10 parts of isatis indigotica leaf, 5 parts of amomum villosum and 8 parts of fennel.

[0025] See also Figure 1 , a method for preparing a biological pesticide for effectively preventing and controlling asparagus stem blight, comprising the following steps:

[0026] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0027] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0028] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0029] Preferably, in this embodiment, in S1 and S2, the amount of water added is 50% of the total water volume respectively, in S2, the temperature of low-heat boiling is 50-60°C, and the duration of low-heat boiling is 20-30 minutes.

[0030] Preferably, in this embodiment, in S2, the filtered extracted drug residue is subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0031] Experiment 1

[0032] 150 asparagus plants that were diseased in the same land and at the same time were selected and divided into three groups, each with 50 plants, namely an experimental group, a control group, and a blank group. The experimental group was sprayed with the biological pesticide for preventing and treating asparagus stem blight prepared in this embodiment, twice a day in the morning and evening, for 3 consecutive days. The control group was sprayed with a chemical pesticide obtained by mixing chemical agents such as carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial net with water, twice a day in the morning and evening, for 3 consecutive days. The blank group was not treated in any way, and the conditions of the diseased asparagus plants were observed 5 days, 10 days, and 15 days after spraying the agents, as shown in the following table:

[0033] Days Number of diseased asparagus plants in the experimental group Number of diseased asparagus plants in the control group Number of diseased asparagus plants in the blank group 5 31 45 50 10 23 40 49 15 12 38 49

[0034] Conclusion: The biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment in the experimental group has a certain effect of preventing and controlling asparagus stem blight, and the chemical agent used in the control group also has a certain effect of preventing and controlling asparagus stem blight. Compared with the experimental group and the control group, the biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment has a better effect of preventing and controlling asparagus stem blight, while the blank group has no obvious effect on preventing and controlling asparagus stem blight.

[0035] Embodiment 2

[0036] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 10 parts of carbendazim, 6 parts of mancozeb, 8 parts of thiophanate-methyl, 5 parts of benlate emulsifiable concentrate, 4 parts of Bordeaux mixture, 5 parts of antibacterial net, 200 parts of water, 30 parts of isatis root, 25 parts of coptis root, 30 parts of purslane, 15 parts of dandelion, 15 parts of isatis indigotica leaf, 10 parts of amomum villosum and 15 parts of fennel.

[0037] See also Figure 1 , a method for preparing a biological pesticide for effectively preventing and controlling asparagus stem blight, comprising the following steps:

[0038] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0039] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0040] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0041] Preferably, in this embodiment, in S1 and S2, the amount of water added is 50% of the total water volume respectively, in S2, the temperature of low-heat boiling is 50-60°C, and the duration of low-heat boiling is 20-30 minutes.

[0042] Preferably, in this embodiment, in S2, the filtered extracted drug residue is subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0043] Experiment 2

[0044] 150 asparagus plants that were diseased in the same land and at the same time were selected and divided into three groups, each with 50 plants, namely an experimental group, a control group, and a blank group. The experimental group was sprayed with the biological pesticide for preventing and treating asparagus stem blight prepared in this embodiment, twice a day in the morning and evening, for 3 consecutive days. The control group was sprayed with a chemical pesticide obtained by mixing chemical agents such as carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial net with water, twice a day in the morning and evening, for 3 consecutive days. The blank group was not treated in any way, and the conditions of the diseased asparagus plants were observed 5 days, 10 days, and 15 days after spraying the agents, as shown in the following table:

[0045] Days Number of diseased asparagus plants in the experimental group Number of diseased asparagus plants in the control group Number of diseased asparagus plants in the blank group 5 28 44 50 10 18 38 50 15 7 38 50

[0046] Conclusion: The biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment in the experimental group has a certain effect of preventing and controlling asparagus stem blight, and the chemical agent used in the control group also has a certain effect of preventing and controlling asparagus stem blight. Compared with the experimental group and the control group, the biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment has a better effect of preventing and controlling asparagus stem blight, while the blank group has no obvious effect on preventing and controlling asparagus stem blight.

[0047] Embodiment 3

[0048] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 7 parts of carbendazim, 4 parts of mancozeb, 5 parts of chlorothalonil, 1 part of benlate emulsifiable concentrate, 2 parts of Bordeaux mixture, 3 parts of antibacterial net, 160 parts of water, 22 parts of isatis root, 18 parts of coptis root, 26 parts of purslane, 10 parts of dandelion, 11 parts of isatis indigotica, 7 parts of amomum villosum and 10 parts of fennel.

[0049] See also Figure 1 , a method for preparing a biological pesticide for effectively preventing and controlling asparagus stem blight, comprising the following steps:

[0050] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0051] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0052] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0053] Preferably, in this embodiment, in S1 and S2, the amount of water added is 50% of the total water volume respectively, in S2, the temperature of low-heat boiling is 50-60°C, and the duration of low-heat boiling is 20-30 minutes.

[0054] Preferably, in this embodiment, in S2, the filtered extracted drug residue is subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0055] Experiment 3

[0056] 150 asparagus plants that were diseased in the same land and at the same time were selected and divided into three groups, each with 50 plants, namely an experimental group, a control group, and a blank group. The experimental group was sprayed with the biological pesticide for preventing and treating asparagus stem blight prepared in this embodiment, twice a day in the morning and evening, for 3 consecutive days. The control group was sprayed with a chemical pesticide obtained by mixing chemical agents such as carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial net with water, twice a day in the morning and evening, for 3 consecutive days. The blank group was not treated in any way, and the conditions of the diseased asparagus plants were observed 5 days, 10 days, and 15 days after spraying the agents, as shown in the following table:

[0057] Days Number of diseased asparagus plants in the experimental group Number of diseased asparagus plants in the control group Number of diseased asparagus plants in the blank group 5 29 46 50 10 20 37 50 15 12 35 49

[0058] Conclusion: The biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment in the experimental group has a certain effect of preventing and controlling asparagus stem blight, and the chemical agent used in the control group also has a certain effect of preventing and controlling asparagus stem blight. Compared with the experimental group and the control group, the biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment has a better effect of preventing and controlling asparagus stem blight, while the blank group has no obvious effect on preventing and controlling asparagus stem blight.

[0059] Embodiment 4

[0060] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 10 parts of carbendazim, 6 parts of mancozeb, 7 parts of thiophanate-methyl, 3 parts of benlate emulsifiable concentrate, 4 parts of Bordeaux mixture, 5 parts of antibacterial net, 200 parts of water, 30 parts of isatis root, 25 parts of coptis root, 30 parts of purslane, 14 parts of dandelion, 15 parts of isatis indigotica leaf, 10 parts of amomum villosum and 15 parts of fennel.

[0061] See also Figure 1 , a method for preparing a biological pesticide for effectively preventing and controlling asparagus stem blight, comprising the following steps:

[0062] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0063] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0064] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0065] Preferably, in this embodiment, in S1 and S2, the amount of water added is 50% of the total water volume respectively, in S2, the temperature of low-heat boiling is 50-60°C, and the duration of low-heat boiling is 20-30 minutes.

[0066] Preferably, in this embodiment, in S2, the filtered extracted drug residue is subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0067] Experiment 4

[0068] 150 asparagus plants that were diseased in the same land and at the same time were selected and divided into three groups, each with 50 plants, namely an experimental group, a control group, and a blank group. The experimental group was sprayed with the biological pesticide for preventing and treating asparagus stem blight prepared in this embodiment, twice a day in the morning and evening, for 3 consecutive days. The control group was sprayed with a chemical pesticide obtained by mixing chemical agents such as carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial net with water, twice a day in the morning and evening, for 3 consecutive days. The blank group was not treated in any way, and the conditions of the diseased asparagus plants were observed 5 days, 10 days, and 15 days after spraying the agents, as shown in the following table:

[0069] Days Number of diseased asparagus plants in the experimental group Number of diseased asparagus plants in the control group Number of diseased asparagus plants in the blank group 5 20 43 49 10 15 43 49 15 7 42 49

[0070] Conclusion: The biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment in the experimental group has a certain effect of preventing and controlling asparagus stem blight, and the chemical agent used in the control group also has a certain effect of preventing and controlling asparagus stem blight. Compared with the experimental group and the control group, the biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment has a better effect of preventing and controlling asparagus stem blight, while the blank group has no obvious effect on preventing and controlling asparagus stem blight.

[0071] Embodiment 5

[0072] A biological pesticide for effectively preventing and treating asparagus stem blight comprises the following raw materials in parts by weight: 9 parts of carbendazim, 5 parts of mancozeb, 6 parts of chlorothalonil, 2 parts of benlate emulsifiable concentrate, 3 parts of Bordeaux mixture, 4 parts of antibacterial net, 180 parts of water, 26 parts of isatis root, 21 parts of coptis root, 28 parts of purslane, 12 parts of dandelion, 13 parts of isatis indigotica leaf, 9 parts of amomum villosum and 12 parts of fennel.

[0073] See also Figure 1 , a method for preparing a biological pesticide for effectively preventing and controlling asparagus stem blight, comprising the following steps:

[0074] S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A;

[0075] S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B;

[0076] S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

[0077] Preferably, in this embodiment, in S1 and S2, the amount of water added is 50% of the total water volume respectively, in S2, the temperature of low-heat boiling is 50-60°C, and the duration of low-heat boiling is 20-30 minutes.

[0078] Preferably, in this embodiment, in S2, the filtered extracted drug residue is subjected to secondary extraction, and the extracted drug residue is subjected to repeated extraction steps of S2, so that secondary extraction of drug components can be achieved, which is conducive to full utilization of the drug.

[0079] Experiment 5

[0080] 150 asparagus plants that were diseased in the same land and at the same time were selected and divided into three groups, each with 50 plants, namely an experimental group, a control group, and a blank group. The experimental group was sprayed with the biological pesticide for preventing and treating asparagus stem blight prepared in this embodiment, twice a day in the morning and evening, for 3 consecutive days. The control group was sprayed with a chemical pesticide obtained by mixing chemical agents such as carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial net with water, twice a day in the morning and evening, for 3 consecutive days. The blank group was not treated in any way, and the conditions of the diseased asparagus plants were observed 5 days, 10 days, and 15 days after spraying the agents, as shown in the following table:

[0081] Days Number of diseased asparagus plants in the experimental group Number of diseased asparagus plants in the control group Number of diseased asparagus plants in the blank group 5 15 46 50 10 8 42 50 15 1 42 50

[0082] Conclusion: The biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment in the experimental group has a certain effect of preventing and controlling asparagus stem blight, and the chemical agent used in the control group also has a certain effect of preventing and controlling asparagus stem blight. Compared with the experimental group and the control group, the biological pesticide for preventing and controlling asparagus stem blight prepared in this embodiment has a better effect of preventing and controlling asparagus stem blight, while the blank group has no obvious effect on preventing and controlling asparagus stem blight.

[0083] In summary, among Examples 1 to 5, the experimental group of Example 5 has the best effect on preventing and treating asparagus stem blight, and therefore, Example 5 is the best example of the present invention.

[0084] Experimental data show that the biological pesticide for efficiently preventing and controlling asparagus stem blight prepared by the present invention can effectively prevent and control asparagus stem blight, greatly increases the prevention and control effect of asparagus stem blight, is beneficial to the healthy growth of asparagus, and is beneficial to practical use.

[0085] It should be specifically explained that: the invention adds the extract B extracted from Chinese herbal medicines Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi and Fennel into the chemical agents carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture and antibacterial net, so as to finally obtain the biological pesticide for effectively preventing and controlling asparagus stem blight, avoids the long-term use of chemical agents to reduce the prevention and control effect of asparagus stem blight, can effectively and efficiently prevent and control asparagus stem blight, greatly increases the prevention and control effect of asparagus stem blight, is conducive to the healthy growth of asparagus, and is conducive to practical use.

[0086] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0087] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A biological pesticide for effectively preventing and treating asparagus stem blight, characterized in that: The invention comprises the following raw materials in parts by weight: 5-10 parts of carbendazim, 3-6 parts of mancozeb, 5-8 parts of thiophanate-methyl, 1-5 parts of benlate emulsifiable concentrate, 1-4 parts of Bordeaux mixture, 2-5 parts of antibacterial net, 150-200 parts of water, 20-30 parts of isatis root, 15-25 parts of coptis root, 25-30 parts of purslane, 10-15 parts of dandelion, 10-15 parts of isatis indigotica leaf, 5-10 parts of amomum villosum and 8-15 parts of fennel.

2. The highly effective biological pesticide for preventing and controlling asparagus stem blight according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 7-10 parts of carbendazim, 4-6 parts of mancozeb, 5-7 parts of thiophanate-methyl, 1-3 parts of benlate emulsifiable concentrate, 2-4 parts of Bordeaux mixture, 3-5 parts of antibacterial net, 160-200 parts of water, 22-30 parts of isatis root, 18-25 parts of coptis root, 26-30 parts of purslane, 10-14 parts of dandelion, 11-15 parts of isatis indigotica leaf, 7-10 parts of amomum villosum and 10-15 parts of fennel.

3. The highly effective biological pesticide for preventing and controlling asparagus stem blight according to claim 2, characterized in that: The invention comprises the following raw materials in parts by weight: 9 parts of carbendazim, 5 parts of mancozeb, 6 parts of chlorothalonil, 2 parts of benlate emulsifiable concentrate, 3 parts of Bordeaux mixture, 4 parts of antibacterial net, 180 parts of water, 26 parts of isatis root, 21 parts of coptis root, 28 parts of purslane, 12 parts of dandelion, 13 parts of isatis indigotica, 9 parts of amomum villosum and 12 parts of fennel.

4. A method for preparing a biological pesticide for efficiently preventing and controlling asparagus stem blight as described in 1-3, characterized in that: The following steps are involved: S1: weigh the raw materials carbendazim, mancozeb, thiophanate-methyl, benlate emulsifiable concentrate, Bordeaux mixture, and antibacterial agent according to weight, mix them together, and add water to fully dissolve them to obtain a mixed solution A; S2: Weigh the raw materials of Radix Isatidis, Rhizoma Coptidis, Herba Portulacae, Herba Taraxaci, Folium Isatidis, Fructus Amomi, and Fennel by weight, wash and drain them, add water to mix them together, heat the water to boiling, turn to low heat to boil, filter and extract them after boiling to obtain extract B; S3: Pour the extract B obtained in S2 into the mixed solution A obtained in S1, and stir them thoroughly to obtain a biological pesticide that is highly effective in preventing and controlling asparagus stem blight.

5. The method for preparing the biological pesticide for efficiently preventing and controlling asparagus stem blight according to claim 4, characterized in that: In S1 and S2, the amount of water added is 50% of the total water amount.

6. The method for preparing the biological pesticide for efficiently preventing and controlling asparagus stem blight according to claim 5, characterized in that: In S2, the extracted drug residue is filtered for secondary extraction, and the extracted drug residue is repeated with the extraction steps of S2, so that the secondary extraction of drug components can be achieved, which is conducive to the full utilization of the drug.

7. The method for preparing the biological pesticide for efficiently preventing and controlling asparagus stem blight according to claim 5, characterized in that: In S2, the temperature of the low-heat cooking is 50-60°C, and the duration of the low-heat cooking is 20-30 minutes.

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