CN109819992B - Bactericidal composition containing pyraclostrobin and thymol - Google Patents
Bactericidal composition containing pyraclostrobin and thymol Download PDFInfo
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- CN109819992B CN109819992B CN201910195616.1A CN201910195616A CN109819992B CN 109819992 B CN109819992 B CN 109819992B CN 201910195616 A CN201910195616 A CN 201910195616A CN 109819992 B CN109819992 B CN 109819992B
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Abstract
The invention relates to a bactericidal composition containing pyraclostrobin and thymol, which comprises the effective components of binary complex of pyraclostrobin and thymol, wherein the mass ratio of pyraclostrobin to thymol is 1-25: 25-1. The pyraclostrobin and the thymol are compounded, so that the composition has an obvious synergistic effect, can delay the generation of essential drug resistance, reduces the production cost and the use cost, and is suitable for preventing and treating various powdery mildew, downy mildew, scab, leaf spot and epidemic diseases of ornamental plants such as fruit trees, vegetables and flowers and field crops.
Description
Technical Field
The invention relates to the technical field of pesticide compounding, and particularly relates to a bactericidal composition containing pyraclostrobin and thymol.
Background
Pyraclostrobin (also known as Pyraclostrobin, chemical name: methyl (N) - [ [ [1- (4-chlorobenzene) pyrazol-3 yl) -oxy ] -0-methoxy ] -N-methoxy carbamate, English name of pyraclostatin), is a novel broad-spectrum bactericide, has the effects of protection, treatment and radical cure, has strong control effects on diseases such as powdery mildew, downy mildew, scab, leaf spot, epidemic disease and the like of melons and vegetables, is rapid in action and long in duration, is safe to crops under recommended dose, promotes nitrogen absorption, enhances the resistance of the crops, and improves the quality of the crops.
Thymol (Thymol; a monoterpene, a phenol derivative of p-cymene) has a molecular formula C10H14O, is an isomer with carvacrol, which is named for its discovery in thyme. CAS number: 89-83-8) is a bactericide extracted from pure plants (better chemical synthesis bactericidal effect), and has protection and treatment effects. The thymol has low toxicity and strong bactericidal effect, has the advantages of small dosage, high efficiency, low toxicity, special effect on powdery mildew and the like, and is suitable for preventing and treating various powdery mildew and fungal diseases of ornamental plants such as fruit trees, vegetables and flowers and field crops, such as apples, grapes, mildew, strawberries,Rose, sweet rice powdery mildew, anthracnose, and the like.
Application of chemical agents is the most effective means of controlling plant diseases. However, continuous application of a single chemical fungicide in a high dose for a long period of time is likely to cause problems such as drug residue, environmental pollution, and development of drug-resistant fungi. The reasonable compounding or mixing of the chemical bactericide has the positive characteristics of expanding the bactericidal spectrum, improving the control effect, prolonging the application suitable period, reducing the dosage, reducing the phytotoxicity, reducing the residue, delaying the occurrence and the development of the drug resistance and the like of fungi, and the compounding of the bactericide is one of the most effective methods for solving the problems. The price of developing new products of bactericides is continuously rising, and compared with the price of developing and researching high-efficiency, low-toxicity and low-residue compounding and mixing, the bactericide has the advantages of low investment, short development period, attention paid to at home and abroad, and development strength are increased in many cases. The inventor screens out pyraclostrobin and thymol for compounding on the basis of indoor screening and field tests, and has an obvious synergistic effect. And no report is made on the compounded bactericidal composition of pyraclostrobin and thymol and the application thereof at present.
Disclosure of Invention
Based on the situation, the invention aims to provide the bactericidal composition containing the pyraclostrobin and the thymol. Is suitable for preventing and treating various powdery mildew, downy mildew, scab, leaf spot, epidemic disease and anthracnose of ornamental plants such as fruit trees, vegetables and flowers and field crops.
The technical scheme of the invention is realized by the following measures:
the bactericidal composition contains pyraclostrobin and thymol, wherein the active ingredients of the bactericidal composition are pyraclostrobin and thymol which are compounded in a mass ratio of 1-25: 25-1, and the balance is auxiliary ingredients. When the mass ratio of the pyraclostrobin to the thymol is 12: when 10, the synergistic effect is the best.
The pesticide formulation which can be prepared by the bactericidal composition can be missible oil, suspending agent, wettable powder, aqueous emulsion, microemulsion and microcapsule. Wherein the total mass of the active ingredients of the pyraclostrobin and the thymol in the preparation accounts for 5-60% of the total mass of the preparation, and when the total mass of the active ingredients accounts for 10-50%, the toxicity and the residue are well balanced, and the cost is low.
The invention further discovers that the effect of preventing and treating the diseases can be effectively enhanced and the stability of the preparation can be improved by adding the arecoline and the capsaicin into the suspending agent of the bactericidal composition, wherein the total weight of the arecoline and the capsaicin in the suspending agent accounts for 2-5% of the total mass of the preparation, and the best effect is achieved when the mass ratio of the arecoline to the capsaicin is 1: 3-5.
The specific implementation scheme of the pesticide formulation prepared from the bactericidal composition is as follows:
the bactericidal composition is an emulsifiable concentrate preparation, and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 8-25 parts of a conventional emulsifier, 20-55 parts of a conventional solvent and 1-5 parts of a conventional synergist. The specific production steps of the emulsifiable solution preparation are that firstly the effective components of pyraclostrobin and thymol are added into the solvent to be completely dissolved, then the emulsifier and the synergist are added and evenly stirred to form uniform and transparent oily liquid, and the uniform and transparent oily liquid is filled to obtain the emulsifiable solution preparation of the composition.
The bactericidal composition is a suspending agent and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 5-20 parts of a dispersing agent, 1-5 parts of an antifreezing agent, 0.1-2 parts of a thickening agent, 0.1-0.8 part of a defoaming agent, 0-10 parts of a penetrating agent, 0.1-5 parts of a pH value regulator and water. The specific production steps of the suspending agent are that other auxiliary agents are mixed, the mixture is uniformly mixed through high-speed shearing, the effective components of pyraclostrobin and thymol are added, and the ball is ground in a ball grinding machine for 2-3 hours, so that the particle diameters are all below 5mm, and the suspending agent preparation of the composition can be prepared.
The bactericidal composition is wettable powder and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 3-10 parts of a dispersing agent, 1-5 parts of a wetting agent and a filler. The wettable powder has the specific production steps as follows: the active ingredients of the pyraclostrobin, the thymol, the dispersant, the wetting agent and the filler are mixed according to the formula, uniformly stirred in a stirring kettle, uniformly mixed through an air flow pulverizer and prepared into the wettable powder of the composition.
The bactericidal composition is an aqueous emulsion, and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 3-30 parts of an emulsifier, 5-15 parts of a solvent, 2-15 parts of a stabilizer, 1-5 parts of an antifreezing agent, 0.1-8 parts of a defoaming agent, 0.2-2 parts of a thickening agent and water. The specific production steps of the aqueous emulsion are as follows: firstly, adding pyraclostrobin, thymol, a solvent and an emulsifier together to dissolve the pyraclostrobin, the thymol, the solvent and the emulsifier into a uniform oil phase; mixing part of water, an antifreeze agent and other pesticide auxiliaries together to form a uniform water phase; adding the oil phase into the water phase while stirring at a high speed in a reaction kettle, slowly adding water until a phase inversion point is reached, starting a shearing machine to carry out high-speed shearing, adding the rest water, and shearing for about half an hour to form an oil-in-water emulsion, thus preparing the composition in the form of the emulsion in water.
The bactericidal composition is a microemulsion and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 10-30 parts of an emulsifier, 1-8 parts of an antifreezing agent, 0.5-10 parts of a stabilizer and 20-50 parts of a conventional solvent cosolvent. The pyraclostrobin and the thymol are completely dissolved by the cosolvent, then the emulsifier, the antifreeze stabilizer and other components are added, the mixture is uniformly mixed, finally the water is added, and the microemulsion can be prepared after full stirring.
The sterilization composition is a microcapsule, and comprises the following components in parts by weight: 1-25 parts of pyraclostrobin, 1-25 parts of thymol, 5-20 parts of urea, 5-20 parts of formaldehyde, 5-20 parts of emulsifying dispersant, 1-5 parts of antifreezing agent, 0.1-2 parts of thickening agent, 0.1-0.8 part of defoaming agent and water. Adding urea and formaldehyde (the mass ratio of substances is about 1: 1.5-2.0) into a three-neck flask with a stirring device, adjusting the pH value of the solution to about 8-9 by using a sodium hydroxide solution, and then heating to 70-80 ℃ for reaction to obtain the stable urea-formaldehyde resin prepolymer. Dissolving a certain amount of pyraclostrobin and thymol in cyclohexane, adding an emulsifying dispersant into the solution, and stirring vigorously to prepare the O/W type stable emulsion taking an aqueous solution containing the emulsifying dispersant as a water phase. The urea-formaldehyde resin prepolymer is added into the emulsion, the pH value is adjusted, and polymerization reaction is carried out under the acid catalysis condition, so that oil phase substances are wrapped to form microcapsule particles. Slowly heating and curing, wherein the temperature is controlled to be 40-50 ℃, and the curing time is 1 h. And (3) adding a proper amount of auxiliary agent to obtain the stable microcapsule.
The emulsifier is selected from one or a mixture of more than one of calcium dodecyl benzene sulfonate, fatty acid polyoxyethylene ether, alkylphenol polyoxyethylene ether sulfosuccinate, styryl phenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty acid polyoxyethylene ester and polyoxyethylene fatty alcohol ether in any ratio.
The solvent is one or a mixture of more than one of xylene, toluene, methanol, ethanol, n-butanol, isopropanol, rosin-based vegetable oil (with the code number of ND-60), solvent oil, dimethylformamide, dimethyl sulfoxide, water and the like in any ratio.
The dispersing agent is selected from one or more of polycarboxylate (with the code numbers of YUS-WG5, TERSPERSE 2700 and TERSPERSE2500), lignosulfonate (with the code numbers of YUS-WG4, YUS-207K, WLNOK, WLNO100 and TERSPERSE2020), alkylphenol polyoxyethylene ether methyl ether condensate sulfate, calcium alkyl sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty amine polyoxyethylene ether and glycerin fatty acid ester polyoxyethylene ether.
The humectant is selected from one or more of sodium dodecyl sulfate, calcium dodecyl benzene sulfonate, nekal BX, TERWET1004, YUS-LXC, TERSPERSE 4894, TERSPERSE2288, alkyl benzene sulfonate polyoxyethylene triphenyl phenyl phosphate, fructus Gleditsiae Abnormalis powder, faeces Bombycis, and fructus Sapindi Mukouossi powder.
The disintegrating agent is one or more selected from bentonite, urea, ammonium sulfate, aluminum chloride, citric acid, succinic acid and sodium bicarbonate.
The thickening agent is selected from one or more of xanthan gum, carboxymethyl cellulose, carboxyethyl cellulose, methyl cellulose, magnesium aluminum silicate and polyvinyl alcohol.
The stabilizer is selected from one of sodium citrate, resorcinol, epoxidized soybean oil and epichlorohydrin.
The antifreezing agent is one of ethylene glycol and glycerol.
The synergist is one or more of SP-4078, organosilicon, hypertonic anesthetic, wax remover, and transdermal agent.
The defoaming agent is selected from one or more of silicone oil, silicone compounds, C10-20 saturated fatty acid compounds and C8-10 fatty alcohol.
The filler is selected from one or more of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch and light calcium carbonate.
The compound bactericide taking the pyraclostrobin and the thymol as the effective components has obvious synergistic effect, delays the generation of the drug resistance of the essential diseases, reduces the production cost and the use cost, and is suitable for preventing and treating various powdery mildew, downy mildew, scab, leaf spot and epidemic diseases of ornamental plants such as fruit trees, vegetables and flowers and field crops.
The invention also discovers that the addition of the arecaidine and the capsaicin into the suspending agent of the pyraclostrobin and the thymol not only can effectively improve the control effect of diseases, but also can greatly improve the stability of the preparation and has longer lasting period.
Detailed Description
In order to make the technical solution, objects and advantages of the present invention more apparent, the present invention is described by the following embodiments, but the present invention is not limited to these examples. The effect experiment of the invention adopts a field test mode, and if not specifically stated, the proportions mentioned below are all mass part ratios.
Example 1 field efficacy test for controlling grass mildew powdery mildew
22% pyraclostrobin-thymol microemulsion
The weight ratio is as follows:
the experimental site: hainan Chengmei
Control agents: 30% pyraclostrobin missible oil, 40% benzyl pyraclostrobin suspending agent and 10% thymol microemulsion, and the mixture is diluted with water to 30L for conventional spraying.
TABLE 1 field test results of efficacy in controlling grass mildew powdery mildew
As can be seen from table 1: the control effect of the embodiment 1 of the invention on the powdery mildew of grass mildew is obviously higher than that of other control medicaments, and the control effect is excellent. The method specifically comprises the following steps: under the condition of using the same dosage, the average control effect of the compound preparation in the example 1 on the grass mildew powdery mildew is more than 92 percent, and other control agents are only 74 to 83 percent.
Example 2 field efficacy test for controlling cucumber downy mildew
Respectively preparing 44% pyraclostrobin and thymol suspending agent (24%: 20%), 5% pyraclostrobin and thymol suspending agent (1%: 4%), 60% pyraclostrobin and thymol suspending agent (40%: 20%), 26% pyraclostrobin and thymol suspending agent (25%: 1%), 26% pyraclostrobin and thymol suspending agent (1%: 25%)
Other auxiliary materials are mixed according to the following weight ratio:
the experimental site: hainan Ha
Control agents: 25% of pyraclostrobin suspending agent, 45% of enoyl pyraclostrobin suspending agent and 66.5% of propamocarb hydrochloride aqueous solution, and diluting the mixture with water to 30L for conventional spraying.
TABLE 2 field efficacy test for controlling cucumber downy mildew
As can be seen from table 2: the control effect of the embodiment 2 of the invention on cucumber downy mildew is obviously higher than that of other control agents, and the control effect is excellent. The method specifically comprises the following steps: the average control effect of the example 2 on the cucumber downy mildew reaches more than 83 percent under the condition of using the same dosage, and other control agents only have 75 to 80 percent.
Example 3 field efficacy test for controlling Phytophthora capsici
22% pyraclostrobin-thymol microemulsion
The weight ratio is as follows:
the experimental site: hainan Chengmei
Control agents: 30% pyraclostrobin missible oil, 45% enoyl pyraclostrobin suspending agent and 10% thymol microemulsion, and the mixture is diluted to 30L by water and sprayed conventionally
TABLE 3 field test results of efficacy in controlling pepper phytophthora blight
As can be seen from table 3: the control effect of the compound preparation in example 3 of the invention on the pepper phytophthora blight is obviously higher than that of other control agents, and the compound preparation has excellent control effect. The method specifically comprises the following steps: under the condition of using the same dosage, the average control effect of the example 3 on the pepper phytophthora blight reaches over 88 percent, and other control medicaments only reach 73 to 82 percent.
Example 4 field efficacy test for prevention and treatment of Areca catechu anthracnose
22%% pyraclostrobin-thymol microemulsion
The weight ratio is as follows:
the experimental site: hainan Chengmei
Control agents: 30% pyraclostrobin missible oil, 20% difenoconazole microemulsion and 10% thymol microemulsion, and diluting with water to 30L for conventional spraying.
TABLE 4 field test results of drug efficacy for prevention and treatment of betel nut anthracnose
As can be seen from table 4: the control effect of the betel nut anthracnose of the embodiment 4 of the invention is obviously higher than that of other control agents, and the invention has excellent control effect. The method specifically comprises the following steps: the average control effect of example 3 on betel nut anthracnose reaches over 90% under the condition of using the same dosage, and other control medicaments only reach 75% -80%.
Example 5 field efficacy test for controlling cucumber downy mildew 2
44% pyraclostrobin-thymol suspending agent
The weight ratio is as follows:
the experimental site: hainan Ha
Control agents: 25% of pyraclostrobin suspending agent, 45% of enoyl pyraclostrobin suspending agent and 66.5% of propamocarb hydrochloride aqueous solution, and diluting the mixture with water to 30L for conventional spraying.
TABLE 5 field efficacy test for controlling cucumber downy mildew
As can be seen from table 5: the control effect of the embodiment 5 of the invention on cucumber downy mildew is obviously higher than that of other control agents, and the control effect is excellent. The method specifically comprises the following steps: the average control effect of example 5 on cucumber downy mildew is more than 95% under the condition of using the same dosage, and other control agents are only 75% -80%.
Example 6 field efficacy test for controlling cucumber downy mildew 3
44% pyraclostrobin-thymol suspending agent
The weight ratio is as follows:
the experimental site: hainan Ha
Control agents: 25% of pyraclostrobin suspending agent, 45% of enoyl pyraclostrobin suspending agent and 66.5% of propamocarb hydrochloride aqueous solution, and diluting the mixture with water to 30L for conventional spraying.
TABLE 6 field test of efficacy against cucumber downy mildew
As can be seen from table 6: the control effect of the compound of the embodiment 6 on the cucumber downy mildew is obviously higher than that of other control agents, and the compound has excellent control effect. The method specifically comprises the following steps: the average control effect of the example 6 on the cucumber downy mildew reaches over 96 percent under the condition of using the same dosage, and other control medicaments only have 75 to 80 percent.
And (4) analyzing results:
in conclusion, the bactericidal composition containing pyraclostrobin and thymol has good control effects on grass mildew powdery mildew, cucumber downy mildew, pepper phytophthora blight and betel nut anthracnose, is safe for target crops, and has a further synergistic effect on the increase of betelnut alkaloids and capsaicin. The compound preparation not only improves the control effect, but also expands the bactericidal spectrum, widens the application range, reduces the cost, plays a role in treating multiple diseases simultaneously, reduces manpower and material resources and improves the production benefit. Therefore, the invention and the popularization of the compound preparation have very important significance to the society.
Example 7: performance determination of 44% pyraclostrobin-thymol suspending agent
The performance such as the suspension percentage and the heat storage stability of the 44% pyraclostrobin-thymol suspending agent of example 2, example 5 and example 6 was measured. The suspension rate is determined by referring to a GB/T14825-2006 pesticide suspension rate determination method, and the decomposition rate is determined by referring to GB/T19136-2003 pesticide heat storage stability standard. The results are shown in Table 7.
TABLE 7 results of suspension, decomposition and stratification rates for different suspending agents
As can be seen from table 7: examples 5 and 6 the decomposition rate and the delamination rate were lower than those of example 2 for 14 days of room temperature storage and 14 days of hot storage; therefore, the pyraclostrobin and thymol suspending agent provided by the invention can be added with arecaidine and capsaicin, so that the stability of the suspending agent can be effectively improved.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.
Claims (2)
1. A bactericidal composition containing pyraclostrobin and thymol is characterized in that: the formulation of the bactericidal composition is a suspending agent, and the suspending agent consists of the following components: the weight percentage of the raw materials is calculated,
2. the bactericidal composition containing pyraclostrobin and thymol according to claim 1, wherein: the bactericidal composition is used for preventing and treating plant powdery mildew, downy mildew, scab, leaf spot, epidemic disease and anthracnose.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015099571A1 (en) * | 2013-12-24 | 2015-07-02 | Государственное научное учреждение Всероссийский научно-исследовательский институт фитопатологии Российской академии сельскохозяйственных наук (ГНУ ВНИИФ Россельхозакадемии) | Composite preparation with fungicidal activity for protecting plants against pathogens, including pathogens resistant to commercial fungicides |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015099571A1 (en) * | 2013-12-24 | 2015-07-02 | Государственное научное учреждение Всероссийский научно-исследовательский институт фитопатологии Российской академии сельскохозяйственных наук (ГНУ ВНИИФ Россельхозакадемии) | Composite preparation with fungicidal activity for protecting plants against pathogens, including pathogens resistant to commercial fungicides |
Non-Patent Citations (1)
| Title |
|---|
| Controlling food-contaminating fungi by targeting their antioxidative stress-response system with natural phenolic compounds;Jong H. Kim et al.;《Appl Microbiol Biotechnol》;20060207;第70卷(第6期);第735-739页 * |
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