CN111316995B - Pesticide composition, pesticide preparation and application of pesticide composition and pesticide preparation - Google Patents
Pesticide composition, pesticide preparation and application of pesticide composition and pesticide preparation Download PDFInfo
- Publication number
- CN111316995B CN111316995B CN201811543494.2A CN201811543494A CN111316995B CN 111316995 B CN111316995 B CN 111316995B CN 201811543494 A CN201811543494 A CN 201811543494A CN 111316995 B CN111316995 B CN 111316995B
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- China
- Prior art keywords
- pesticide
- fluopyram
- crops
- pyraclostrobin
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- HZRSNVGNWUDEFX-UHFFFAOYSA-N pyraclostrobin Chemical compound COC(=O)N(OC)C1=CC=CC=C1COC1=NN(C=2C=CC(Cl)=CC=2)C=C1 HZRSNVGNWUDEFX-UHFFFAOYSA-N 0.000 claims abstract description 45
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/24—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing the groups, or; Thio analogues thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention provides a pesticide composition, a pesticide preparation and application of the pesticide composition and the pesticide preparation. The pesticide composition comprises fluopyram and pyraclostrobin, and the weight ratio of the fluopyram to the pyraclostrobin is 1: 20-20: 1. The compound pesticide comprises the fluopyram and the pyraclostrobin, not only has the universality of crops, but also enables the synergistic effect to be more prominent and stable by further controlling the weight ratio of the fluopyram and the pyraclostrobin. The compounding of the two medicines keeps the advantages of no mutual drug resistance when the two medicines are mixed for use, the drug resistance of crops to fluopyram can be obviously reduced, the service life of the pharmaceutical composition is prolonged, and meanwhile, the cost of the medicament is further reduced due to the low price of the zolamide ester.
Description
Technical Field
The invention relates to the field of pesticide development, and particularly relates to a pesticide composition, a pesticide preparation and application of the pesticide composition and the pesticide preparation.
Background
Plant nematode disease is a plant disease caused by infestation and parasitism by plant parasitic nematodes. The damaged plant can affect normal growth and development because the nematode invades to absorb nutrition in the body; secretion in the metabolic process of nematodes can also stimulate cells and tissues of host plants, cause plant deformity, and utilize natural enemy control and the like to reduce the yield and quality of agricultural products.
Root rot is a disease caused by fungi, which causes root rot, gradually weakens the function of absorbing water and nutrients, and finally dies the whole plant, mainly manifested as yellowing and withering of the whole plant leaves.
Peanut leaf spot disease spreads throughout the main peanut producing areas of China, and the existing harm affects the leaves, the petioles and the stems of peanut plants. Mainly occurs in the early and middle growth stages of the peanuts, and causes the reduction of photosynthesis of leaves, early defoliation and serious yield reduction.
Powdery mildew is a common plant disease and can infect various crops such as wheat, melons, fruits, seedlings, flowers and the like. In wheat, such as wheat, barley, rye and the like, melons, such as cucumbers, melons and the like, and fruits, such as grapes, strawberries and the like, the occurrence rate is relatively high throughout the year, and the yield and the quality of crops are seriously influenced.
Fluopyram, english name: fluopyram, chemical name: n- {2- [ 3-chloro-5- (trifluoromethyl) -2-pyridinyl ] ethyl-a, a, a-o-trifluoromethylbenzamide }. Fluopyram is a new generation succinate dehydrogenase inhibiting bactericide, acts on a complex II (namely succinate dehydrogenase or succinate coenzyme Q reductase) on a mitochondrial respiratory electron transfer chain, is a nematicide with low toxicity to users and the environment, is a broad-spectrum bactericide, a seed treatment agent, an agricultural product storage preservative and the like, and has multiple functions. Fluopyram shows obviously different mobility in soil, and can be slowly and uniformly distributed in the soil on the upper layer, so that the fluopyram can effectively and long-term protect root systems from being infected by nematodes in the rhizosphere range. The agent has low toxicity, and can satisfy the requirements of environmental safety and continuously solving the nematode problem. Can be applied to more than 70 kinds of crop fields such as field crops, vegetables, flowers, lawns, melons, fruits, tobaccos and the like, and is effective to plant nematode diseases, powdery mildew, root rot diseases, leaf spot diseases and the like, but the use cost of the pesticide is higher.
The active group of the methoxy acrylic acid ester bactericide is methoxy acrylic acid (ester/amide), which mainly acts on cytochrome bcl compound in the mitochondrial respiratory chain of the fungus to prevent electron transfer so as to inhibit the growth of the fungus or kill the fungus. It is different from any inhibitor that is currently available at the site of action on the respiratory chain. Meanwhile, the selectivity of the bactericide to plants comes from the deesterification of enzyme in the plants, and the toxicity of the bactericide is lost due to the deesterification of the enzyme, so that the bactericide cannot reach mitochondria of animals and plants, and cannot influence the electron transfer of plants, insects and mammals, so that the bactericide is safe to the animals and the plants, has low toxicity, good compatibility to the plants, poor fluidity in soil, and easy to rapidly degrade, and is safe to underground water. Meanwhile, the strobilurin fungicide has a promoting effect on plant growth, can directly control diseases, and can induce physiological changes of a plurality of crops, especially cereals, so that the yield can be increased and the plant senescence can be delayed. The pyraclostrobin has a broad bactericidal spectrum and high bactericidal activity, has protection and treatment activity on various plant diseases, and has systemic conductivity; and the cost of the medicament is lower.
Disclosure of Invention
The invention mainly aims to provide a pesticide composition, a pesticide preparation and application of the pesticide composition and the pesticide preparation, wherein the pesticide composition has higher synergistic effect on preventing and treating plant nematode diseases, root rot diseases, leaf spot diseases and powdery mildew, is long in service life and has wide adaptability.
In order to achieve the above object, according to one aspect of the present invention, a pesticide composition is provided, which includes fluopyram and pyraclostrobin, wherein the weight ratio of fluopyram to pyraclostrobin is 1: 20-20: 1.
Further, the weight ratio of the fluopyram to the pyraclostrobin is 1: 10-10: 1, preferably 1: 5-5: 1, and preferably 1: 4-3: 1.
Further, the pesticide composition is a pesticide composition for treating plant nematode disease, root rot disease, leaf spot disease and powdery mildew.
According to another aspect of the present invention, there is provided a pesticide formulation comprising a pesticide composition and an adjuvant, the pesticide composition being a pesticide composition of any one of the above, preferably the pesticide formulation is a pesticide formulation for the treatment of plant nematode disease, root rot disease, leaf spot disease and powdery mildew.
Further, the content of the pesticide composition in the pesticide preparation is 0.1-95% by weight, preferably 50-80% by weight.
Further, the pesticide preparation is selected from any one of wettable powder, water dispersible granules, suspending agents, oil suspending agents, missible oil, aqueous emulsion, microemulsion, suspoemulsion, suspended seed coating agents, granules, microcapsule suspending agents and microcapsule suspending-suspending agents.
Further, the auxiliary agent is a surfactant and/or a wetting agent.
According to another aspect of the present invention, there is provided a use of the pesticidal composition of any one of the above or the pharmaceutical formulation of any one of the above as a fungicide for crops.
Further, the bactericide is used for treating plant nematode disease, root rot, leaf spot and powdery mildew.
Further, the crops are selected from any one or more of grain crops, bean crops, fiber crops, sugar crops, melon crops, fruit crops, dry fruit crops, hobby crops, root crops, oil crops, flower crops, medicinal crops, raw crops and green manure pasture crops.
By applying the technical scheme of the invention, when the compound medicament of various strobilurin bactericides and fluopyram is researched, the combined medicament compounded by fluopyram and pyraclostrobin is unexpectedly found to have the universality of crops, and the synergistic effect is more prominent and stable by further controlling the weight ratio of the fluopyram to the pyraclostrobin. The compounding of the two medicines keeps the advantages of no mutual drug resistance when the two medicines are mixed for use, the drug resistance of crops to fluopyram can be obviously reduced, the service life of the pharmaceutical composition is prolonged, and meanwhile, the cost of the medicament is further reduced due to the low price of the zolamide ester.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As analyzed in the background of the present application, fluopyram, as the first nematicide with low toxicity to users and the environment, has high biological safety, broad bactericidal spectrum, and good control effect on plant nematode disease, root rot, leaf spot and powdery mildew, but has high use cost, and acts on a complex on a mitochondrial respiration electron transfer chain, and the action site is single, thus easily causing the drug resistance of crops after long-term use. The methoxy acrylic ester bactericide acts on cytochrome bcl compound in mitochondrial respiratory chain of fungi mainly to inhibit the growth of fungi or kill fungi by stopping electron transfer, and because the selectivity of the bactericide on plants comes from the deesterification of enzymes in the plants, the toxicity of the bactericide is lost due to the deesterification of the enzymes, so that the bactericide cannot reach the mitochondria of animals and plants, and cannot influence the electron transfer of plants, insects and mammals, thereby being safe to the animals and plants. Therefore, when the two bactericides are matched, the two bactericides can play a role in synergy, the drug resistance of crops to fluopyram can be obviously reduced, and the service life of the bactericide is prolonged. However, in the prior art, a plurality of methoxy acrylate bactericides exist, and when different methoxy acrylate bactericides are matched with fluopyram, the realized synergistic effect degree is obviously different, and the disease curing effect on different plants is also different, so that the compound medicine formed by the two bactericides has no wide adaptability. In order to solve the problem that the pesticide agent in the prior art does not have wide applicability in the service life, the application provides a pesticide composition, a pesticide preparation and application of the pesticide composition and the pesticide preparation.
In a preferred embodiment of the application, the pesticide composition comprises fluopyram and pyraclostrobin, and the weight ratio of the fluopyram to the pyraclostrobin is 1: 20-20: 1.
When the compound medicament of various strobilurin bactericides and fluopyram is researched, the combined medicament compounded by fluopyram and pyraclostrobin is unexpectedly found to have the universality of crops, can be applied to various crops such as grain crops, bean crops, fiber crops, sugar crops, melon crops, fruit crops and the like for treating plant nematode diseases, root rot diseases, leaf spot diseases and powdery mildew, and the synergistic effect is more prominent and stable by further controlling the weight ratio of the two. The compounding of the two medicines keeps the advantages of no mutual drug resistance when the two medicines are mixed for use, the drug resistance of crops to fluopyram can be obviously reduced, the service life of the pharmaceutical composition is prolonged, and meanwhile, the cost of the medicament is further reduced due to the low price of the zolamide ester.
In order to enhance the synergistic effect when the two are used in combination, in a preferred embodiment, the weight ratio of the fluopyram to the pyraclostrobin is 1: 10-10: 1, preferably 1: 5-5: 1, and preferably 1: 4-3: 1. In addition, experiments prove that the pesticide composition can be used as a pesticide composition for treating plant nematode disease, root rot disease, leaf spot disease and powdery mildew.
In another exemplary embodiment, the present application provides a pesticidal formulation comprising a pesticidal composition and an adjuvant, wherein the pesticidal composition is a pesticidal composition of any of the above. The pesticide composition is mixed with the auxiliary agent to form a pesticide preparation, so that the pesticide preparation can be conveniently used on crops, the utilization efficiency of the pesticide composition is improved, and the pesticide preparation is preferably used for treating plant nematode disease, root rot disease, leaf spot disease and powdery mildew.
In a preferred embodiment, the content of the pesticide composition in the pesticide preparation is 0.1-95% by weight, preferably 50-80% by weight. The preparation weight ratio is controlled within the range, which is not only beneficial to promoting the dispersion of the pesticide composition in the pesticide preparation so as to be beneficial to exerting the pesticide effect, improving the pesticide effect exerting efficiency of the two active components, but also can ensure that the sufficient active components are beneficial to sterilizing crops.
In order to further improve the convenience of the pesticide preparation, the pesticide preparation of the present application can take various forms existing on the market, such as various liquid preparations, solid preparations or colloid preparations, and preferably the pesticide preparation is selected from any one of wettable powder, water dispersible granules, suspending agents, oil suspending agents, missible oil, emulsion in water, microemulsion, suspoemulsion, suspended seed coating agents, granules, microcapsule suspending agents and microcapsule suspending-suspending agents.
In the pesticide preparation provided by the application, the auxiliary agent is an agriculturally acceptable carrier, and can be processed with the pesticide composition into various dosage forms such as aqueous or oily suspension, powder, oil dispersion, particles and the like which are directly used or used after being mixed with water. The various pesticidal formulations described above can be formulated in known manner. For example by mixing the active ingredient with a solvent as an adjuvant. Wherein the solvent is mainly water, benzene, xylene, toluene, alkylbenzene, aliphatic hydrocarbon, alcohols, esters, ketones, and vegetable oil.
There are many adjuvants which can be used both as agriculturally acceptable carriers and together with the pesticidal composition to form the above-described formulations, and in a preferred embodiment, the adjuvants are surfactants and/or wetting agents. The surfactant may be alkali metal salt, alkaline earth metal salt, ammonium salt, alkyl aryl sulfonate, alkyl sulfate, alkyl sulfonate, fatty alcohol sulfate, etc. of lignosulfonic acid, naphthalenesulfonic acid, phenolsulfonic acid, dibutylnaphthalenesulfonic acid. The wetting agent can be sodium lauryl sulfate, sodium dodecyl sulfate, sodium alkyl benzene sulfonate, sodium alkyl naphthalene sulfonate, sorbitan fatty acid ester polyoxyethylene ether, etc.
In another exemplary embodiment of the present application, there is provided a use of any one of the above-described pesticide compositions or any one of the above-described pesticide formulations as a crop fungicide. When the pesticide composition or the pesticide preparation provided by the application is applied to a bactericide, stable and outstanding synergistic effect among active components can be realized, the generation of drug resistance of a single agent is reduced, the service life of the agent is prolonged, and the pesticide composition or the pesticide preparation has good biological safety while the use cost is reduced.
According to the action points and action principles of the two active components in the pesticide composition and the pesticide preparation, the bactericide is used for treating plant nematode disease, root rot, leaf spot and powdery mildew, and the control effect is particularly outstanding.
In a preferred embodiment, the fungicide of the present application can be used as a broad-spectrum antimicrobial pesticide, and preferably the crop is selected from any one or more of grain crops, bean crops, fiber crops, sugar crops, melon crops, fruit crops, dried fruit crops, hobby crops, root crops, oil crops, flower crops, medicinal crops, raw crops and greenmanure grass crops. It should be noted that, the bactericide is not limited to be used in the above crops based on the two active ingredients, but in a great deal of research, it has been found that the synergistic control effect is more prominent when the bactericide is used in the above range based on the accuracy and high efficiency of the action site of the active ingredients of the present application, and the above crops are also crops with a large planting area and have higher dependence on the bactericide.
When the bactericide is sprayed, the bactericide is preferably prepared into a spraying agent with the concentration of 5-1500 mg/L, and preferably 50-500 mg/L for use.
The present application is further described in detail below with reference to specific examples to further illustrate the benefits of the present application, which are not to be construed as limiting the scope of the invention as claimed.
The preparation method of the pesticide preparation is illustrated as follows:
the active component composition of the preparation comprises a component A and a component B; the component A is selected from fluopyram, the component B is selected from pyraclostrobin, and then different formulations are prepared according to the following mode:
suspending agent (SC)
In a stirred ball mill, 20 wt% of the active ingredient composition, 5 wt% of sodium naphthalenesulfonate formaldehyde condensate, 0.08 wt% of xanthan gum, 0.1 wt% of white carbon black, 4.0 wt% of agricultural emulsion 0201B, 4 wt% of ethylene glycol and a little defoamer are added, and finally water is used for supplementing to 100% to prepare the finely-divided active ingredient suspending agent. Diluting with water to obtain suspension, and spraying stem and leaf or irrigating soil.
Water dispersible granule (WG)
50% by weight of the finely ground active ingredient composition, 12% by weight of a castor oil ethylene oxide adduct, 2% by weight of polyvinylpyrrolidone, 10% by weight of an alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, 2.8% by weight of a phenol resin, and 23.2% by weight of gypsum were mixed, and prepared into water-dispersible or water-soluble granules by means of an extruder, a spray tower, and a fluidized bed. Diluting with water to obtain dispersion or solution, and spraying stem and leaf or irrigating soil.
Wettable Powder (WP)
40 wt% of the active ingredient composition was ground in a rotor-stator mill and 1.8 wt% of sodium lauryl sulfate, 10 wt% of white carbon black, 8 wt% of sodium lignin sulfonate, 6 wt% of a bis (alkyl) naphthalene sulfonate formaldehyde condensate, 34.2 wt% of light calcium carbonate were added to prepare a powdery preparation. Diluting with water to obtain dispersion or solution, and spraying stem and leaf or irrigating soil.
The test method and the evaluation method are as follows:
the synergistic effect of the compositions of the present invention can be illustrated by the following examples, but the present invention is by no means limited thereto. Weighing a proper amount of compound samples of the component A and the component B, respectively dissolving the compound samples with acetone (the volume ratio of the amount of the acetone to the amount of the solution is equal to or less than 0.05: 1), diluting the compound samples with water containing 0.1 percent (volume) of emulsifier Tween 80 to prepare liquid to be detected with required concentration, and then respectively mixing the prepared liquid to be detected with the component A and the liquid to be detected with the required concentration according to a set proportion to prepare the liquid to be detected of the composition. And spraying the solution to be detected on the disease host plants by using a crop sprayer, and inoculating diseases after 24 hours. According to the characteristics of diseases, the disease plants needing temperature control and moisture preservation culture are inoculated and then are cultured in a climatic chamber. After the control was sufficiently ill, these percentages were converted to efficacy by evaluating the percentage of infestation by the leaf area of the crop. Potency (W) was calculated using Abbott's formula:
W＝(1-α/β)×100
in the formula:
α: percent fungal infestation of treated plants;
beta: percent fungal infection of untreated (placebo) plants;
an efficacy of "0" indicates that the level of infestation of the treated crop is the same as the level of infestation of the untreated control crop; an efficacy of "100" indicates that the treated crop is not infested.
The expected efficacy of the active compound mixtures was determined using the Colby formula [ r.s.colby, Weeds (Weeds)15,20-22(1967) ] and compared to the observed efficacy.
Colby formula: e ═ x + y-xy/100
In the formula:
e: the expected efficacy when using mixtures of active compounds a and B at concentrations a and B, respectively, expressed as% of the untreated control;
x: the efficacy when using active compound a at a concentration a, expressed as% of the untreated control;
y: the efficacy when using active compound B at a concentration B, expressed as% of the untreated control;
wherein: a. b is the proportion of the active ingredients of fluopyram and pyraclostrobin in the composition respectively.
EXAMPLE 1 wheat powdery mildew control test
The wheat variety is Liaochun No. 10. The potted wheat seedlings were cultivated in a greenhouse until the two-leaf stage, the mixture concentration was prepared according to the drug concentration described in the table below, and the leaves were sprayed with a crop sprayer until the droplets were densely distributed on the leaves but not dropped. The sprayed crops are placed in a fume hood for airing, spores of wheat powdery mildew pathogenic bacteria are inoculated by adopting a method of shaking off the spores after 24 hours, and the crops are placed in a climatic chamber (the temperature is 22 ℃ in the day, 18 ℃ in the night and the relative humidity is 70 percent) for cultivation for 1 day after inoculation, and then are moved to a greenhouse. After the blank control had been sufficiently ill, the degree of development of the pathogen infestation of the first leaf of each wheat was investigated by visual inspection and the observed and expected efficacy of the active compounds and the mixtures according to the invention was calculated. The detailed results are shown in tables 1 and 2.
TABLE 1
TABLE 2
Note: the difference between the observed efficacy and the calculated efficacy is positive, which indicates that the proportioning shows synergistic effect, the synergistic effect is more obvious when the difference is larger, and the time difference value is obviously larger than other ratios when the mass ratio of the fluopyram to the pyraclostrobin is 1: 4-3: 1.
Example 2 test for controlling leaf spot of peanut
The peanut is Dabaisha. Culturing potted peanut seedlings in a greenhouse, selecting peanut seedlings with regular and consistent growth and same leaf age, preparing mixture concentration according to the medicament concentration in the following table, and carrying out leaf spraying treatment by using a crop sprayer until liquid drops are densely distributed on the leaves but do not drop. Spraying, and air drying in a fume hood. After 24 hours, a pathogen spore suspension was inoculated, and then the suspension was placed in a climatic chamber for wet culture for 24 hours (temperature: day 22 ℃, night 18 ℃, relative humidity: 70%) for 1 day, and then the culture was transferred to a greenhouse. After the blank control had developed sufficient disease, the degree of development of leaf pathogen infestation was investigated by visual inspection and the observed and expected efficacy of the active compounds and the mixture according to the invention was calculated.
TABLE 3
TABLE 4
Note: the difference between the observed efficacy and the calculated efficacy is positive, which indicates that the proportioning shows synergistic effect, the synergistic effect is more obvious when the difference is larger, and the time difference value is obviously larger than other ratios when the mass ratio of the fluopyram to the pyraclostrobin is 1: 4-3: 1.
Example 3 field plot experiment for controlling Soybean root rot
Shenyang Liaoning test site.
The test medicament and the dosage are shown in table 5, and the soybean variety is LiaoDou 15. Each treatment was repeated 4 times, 25 square meters per cell. And (5) seed dressing treatment before sowing, and setting blank contrast. The test was conducted 10 days and 30 days after the emergence of seedlings. Sampling at five points in each cell, taking 30 soybean plants in total, and recording the total number of the plants and the number of the plants with diseases. Calculating the disease index and the prevention and treatment effect of each treatment.
Grading standard:
level 0: the base part and the main root of the plant stem have no disease spots;
level 1: a small amount of scabs are arranged on the base part and the main root of the stem;
and 3, level: the base part of the stem and the main root have more scabs, and the area of the scabs accounts for one fourth to one half of the total area of the stem and the root;
and 5, stage: the disease spots on the base part and the main root of the stem are more and larger, and the area of the disease spots accounts for one half to three quarters of the total area of the stem and the root;
and 7, stage: the disease spots on the base part of the stem and the main root are connected to form a stem winding phenomenon, but the root system is dead;
and 9, stage: root necrosis, wilting or death of the overground part of the plant.
The drug effect calculation method comprises the following steps:
the results of the field tests are shown in table 5:
TABLE 5
As can be seen from the data in Table 5, significant control was achieved after 10 days of application of the mixtures of the present application; the control effect is slightly improved after 30 days; the control effect generally tends to increase along with the increase of the ratio of the pyraclostrobin in the mixture, and the control effect is particularly remarkable when the mass ratio of the fluopyram to the pyraclostrobin is 1: 4-3: 1.
Example 4 field plot trials for prevention and treatment of Soybean cyst nematode disease
Shenyang Liaoning test site.
The experimental medicaments and the dosage are shown in a table 6, and the soybean variety is Liaodou 15. Each treatment was repeated 4 times, 25 square meters per cell. And (5) seed dressing treatment before sowing, and setting blank contrast. Investigation was carried out 30 days after emergence. 50 soybean plants are randomly dug in each cell, washed by water and graded to investigate the cyst number of soybeans. Calculating disease index and preventing and treating effect of each treatment.
Grading standard:
stage 0: the disease is not developed;
level 1: the number of soybean cysts per unit is 1-3;
and 3, level: the number of soybean cysts per unit is 4-10;
stage 5: the number of soybean cysts per unit is 11-30;
and 7, stage: the number of soybean cysts per unit is 31-50;
and 9, stage: the number of soybean cysts per unit is more than 51.
The drug effect calculation method comprises the following steps:
the results of the field tests are shown in table 6:
TABLE 6
| Test agent (weight ratio) | Effective component (g/100 kg seed) | Control effect (%) |
| Fluopyram | 100 | 45.00 |
| Pyraclostrobin (Zuofenac) | 200 | 2.30 |
| Fluopyram + pyraclostrobin (1:20) | 200 | 55.00 |
| Fluopyram + pyraclostrobin (1:15) | 200 | 56.00 |
| Fluopyram + pyraclostrobin (1:10) | 200 | 58.90 |
| Fluopyram + pyraclostrobin (1:5) | 200 | 69.80 |
| Fluopyram + pyraclostrobin (1:4) | 200 | 82.35 |
| Fluopyram + pyraclostrobin (1:3) | 200 | 85.21 |
| Fluopyram + pyraclostrobin (1:2) | 200 | 87.90 |
| Fluopyram + pyraclostrobin (1:1) | 200 | 92.00 |
| Fluopyram + pyraclostrobin (2:1) | 200 | 88.90 |
| Fluopyram + pyraclostrobin (3:1) | 200 | 87.65 |
| Fluopyram + pyraclostrobin (4:1) | 200 | 82.00 |
| Fluopyram + pyraclostrobin (5:1) | 200 | 81.85 |
| Fluopyram + pyraclostrobin (10:1) | 200 | 80.05 |
| Fluopyram + pyraclostrobin (15:1) | 200 | 79.00 |
| Fluopyram + pyraclostrobin (20:1) | 200 | 77.50 |
| Fluopyram + pyraclostrobin (25:1) | 200 | 74.35 |
| Fluopyram + pyraclostrobin (30:1) | 200 | 75.50 |
| Fluopyram + pyraclostrobin (1:25) | 200 | 52.00 |
| Fluopyram + pyraclostrobin (1:30) | 200 | 50.50 |
As can be seen from the data in Table 6, excellent control of soybean cyst nematode disease can be achieved after 30 days of application of the mixture of the present application; the synergistic effect is obvious along with the increase of the proportion of fluopyram in the mixture, and the control effect is particularly remarkable when the mass ratio of fluopyram to pyraclostrobin is 1: 4-3: 1.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
when the application researches the compound medicaments of various methoxy acrylate bactericides and fluopyram, the unexpected discovery shows that the compound medicament comprising the compound of fluopyram and pyraclostrobin not only has the universality of crops, but also enables the synergistic effect to be more prominent and stable by further controlling the weight ratio of the fluopyram to the pyraclostrobin. The compounding of the two medicines keeps the advantages that the two medicines have no mutual drug resistance when being mixed for use, can obviously reduce the drug resistance of crops to fluopyram, and further reduces the cost of the medicament because the price of the zolamide is low.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The application of a pesticide composition or a pesticide preparation in treating plant nematode diseases as a crop bactericide is characterized in that the crop is selected from any one or more of grain crops and oil crops, the pesticide composition comprises fluopyram and pyraclostrobin, the weight ratio of the fluopyram to the pyraclostrobin is 1: 4-3: 1, and the pesticide preparation comprises the pesticide composition and an auxiliary agent.
2. The use according to claim 1, wherein the pesticide composition is present in the pesticide formulation in an amount of 0.1 to 95% by weight.
3. The use according to claim 2, wherein the pesticide composition is present in the pesticide formulation in an amount of 50 to 80% by weight.
4. The use according to claim 1, wherein the pesticide formulation is selected from any one of wettable powder, water dispersible granules, suspending agents, oil suspending agents, emulsifiable concentrates, aqueous emulsions, microemulsions, suspoemulsions, suspended seed coatings, granules, microcapsule suspending agents and microcapsule suspending-suspending agents.
5. Use according to claim 4, wherein the adjuvant comprises a surfactant.
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| CN102919256A (en) * | 2012-11-28 | 2013-02-13 | 河北省农林科学院植物保护研究所 | Fluopicolide-containing compound bactericide and application thereof |
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| CN103518724A (en) * | 2012-07-06 | 2014-01-22 | 陕西美邦农药有限公司 | Bactericidal composition containing fluopyram and methoxyacrylate |
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