CN113785837A - Acaricidal composition - Google Patents
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- CN113785837A CN113785837A CN202110933541.XA CN202110933541A CN113785837A CN 113785837 A CN113785837 A CN 113785837A CN 202110933541 A CN202110933541 A CN 202110933541A CN 113785837 A CN113785837 A CN 113785837A
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- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
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- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
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- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
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Abstract
The invention relates to a mite-killing composition, which has good control effect on various mites, particularly on panonychus citri. The alkyl ethyl sulfonate has strong contact activity on adult mites and nymph mites, can paralyze and dehydrate the mites, is matched with the fluazinam to further block energy synthesis of the mites, so that the adult mites, the nymph mites and mite eggs are rapidly killed, have obvious synergistic effect, have the characteristics of small using amount and high mite killing efficiency, have quick drug effect, overcome and delay the drug resistance of the mites, are beneficial to reducing the using amount and reduce the influence on the environment.
Description
Technical Field
The invention relates to the technical field of acaricides, and particularly relates to an acaricide composition.
Background
In the citrus planting process, panonychus ulmi is a main pest which harms citrus, a mouth organ punctures the epidermis of a host leaf to suck juice, the surface of the damaged leaf presents numerous grey-white speckles, and the whole leaf loses green to become grey-white in severe cases, so that a large number of fallen leaves are caused, fruits and green branches and tips can be also harmed, and tree vigor and yield are influenced.
However, the control difficulty of mites is getting higher and higher at present, because the resistance of mites is increased year by year under the continuous medicament selection pressure, the control effect of acaricide is greatly discounted, the environment is affected by increasing the dosage of acaricide, the acaricide is not beneficial to environmental protection, the citrus diseases and insect pests control faces a great challenge, and higher requirements are provided for the citrus diseases and insect pests control, so that a high-efficiency acaricide is necessary to be researched.
Disclosure of Invention
Based on the above, the acaricidal composition needs to be provided.
The technical scheme for solving the technical problems is as follows: an acaricidal composition comprising: the composition comprises fluazinam, alkyl ethyl sulfonate and an auxiliary agent, wherein the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.2-5: 1.
in one embodiment, the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.3-3: 1.
in one embodiment, the adjuvant comprises: at least one of dispersing agent, antifreezing agent, thickening agent, defoaming agent, penetration enhancer, disintegrating agent, solvent and filler.
In one embodiment, the acaricidal composition comprises, in parts by mass: 1 to 25 portions of flonicamid, 1 to 25 portions of alkyl ethyl sulfonate, 3 to 8 portions of dispersant, 1 to 5 portions of antifreeze, 0.1 to 2 portions of thickener, 0.1 to 0.8 portion of defoamer and 40 to 70 portions of solvent.
In one embodiment, the acaricidal composition comprises, in parts by mass: 1 to 25 parts of flonicamid, 1 to 25 parts of alkyl ethyl sulfonate, 3 to 10 parts of dispersant, 1 to 10 parts of wetting agent, 1 to 5 parts of disintegrating agent and 0.9 to 5 parts of filler.
In one embodiment, the method further comprises the following steps of: 5 to 13 parts of modified nano titanium dioxide sol.
In one embodiment, the processing method of the modified nano titanium dioxide sol comprises the steps of providing a chitosan selenium solution and a nano titanium dioxide sol, and mixing and stirring the nano titanium dioxide sol and the chitosan selenium solution to obtain the modified nano titanium dioxide sol.
In one embodiment, the providing the selenium chitosan solution comprises: dissolving 3.5-7 parts of sodium selenite in 500-700 parts of water to obtain a sodium selenite solution, adding 1-3 parts of a protective agent into the sodium selenite solution, uniformly stirring, then dropwise adding a reducing agent under an ultrasonic condition to obtain nano selenium sol, finally dropwise adding a chitosan quaternary ammonium salt solution into the nano selenium sol, and stirring for 20-40 min to obtain the chitosan selenium solution.
In one embodiment, the providing the nano titania sol includes: adding 20-50 parts of hydrated titanium dioxide into 500-1400 parts of water, adding 20-70 parts of dilute sulfuric acid, stirring and fully dissolving to obtain a nano titanium dioxide solution, adding a pH regulator into the nano titanium dioxide solution, regulating the pH value to 9-11, centrifuging to obtain a precipitate, adding 600-2000 parts of water to dissolve to form a nano titanium dioxide suspension, adding 50-70 parts of hydrogen peroxide into the nano titanium dioxide suspension, heating and stirring for 3-8 hours, adding the pH regulator, and regulating the pH value to 7 to obtain the nano titanium dioxide sol.
In one embodiment, the mixing and stirring of the nano titanium dioxide sol and the chitosan selenium solution comprises:
according to the proportion that selenium and titanium in the chitosan selenium solution and the nano titanium dioxide sol are 0.3-0.7: mixing the nano titanium dioxide sol and the chitosan selenium solution according to the molar ratio of 100.
The invention has the beneficial effects that: the acaricidal composition provided by the invention has good control effect on various mites, and particularly has good control effect on panonychus citri. The alkyl ethyl sulfonate has strong contact activity on adult mites and nymph mites, can paralyze and dehydrate the mites, is matched with the fluazinam to further block energy synthesis of the mites, so that the adult mites, the nymph mites and mite eggs are rapidly killed, have obvious synergistic effect, have the characteristics of low using amount and high mite killing efficiency, quickly exert the drug effect, overcome and delay the drug resistance of the mites, facilitate reducing the using amount and reduce the influence on the environment.
Detailed Description
The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, an acaricidal composition comprises: the fluazinam-alkyl ethyl sulfonate-based composite material comprises fluazinam, alkyl ethyl sulfonate and an auxiliary agent, wherein the mass ratio of the fluazinam to the alkyl ethyl sulfonate is (0.2-5): 1. specifically, the alkyl ethyl sulfonate has strong contact activity, quickly paralyzes mites, further dehydrates and dies, has no effect on pesticide effect, is matched with the beta-trifluoromethyl aminopyridine part in the fluazinam to be conveyed to an energy synthesis active point of the mites, further blocks the mites from energy synthesis, can inhibit the growth of adult mites, nymphs and mite eggs, comprehensively kills panonychus citri, can play a role in inhibiting the germination, permeation, hypha growth and spore formation of pathogen spores in the process of disease and fungus damage, and has the effect of preventing and treating the disease and fungus damage.
By compounding fluazinam and alkyl ethyl sulfonate, the fluazinam and the alkyl ethyl sulfonate have obvious synergistic effect, have good control effect on various mites, and particularly have good control effect on panonychus citri. And when the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.2-5: 1, the acaricide composition has excellent activity, has obvious synergistic effect, has the characteristics of small dosage and high acaricidal efficiency, can quickly exert the pesticide effect, overcomes and delays the pesticide resistance of mites, is favorable for reducing the dosage and reduces the influence on the environment. Further, the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.3-3: 1, the composition has obvious synergistic effect on the gray mold, and the prevention and treatment effect is obviously improved.
In one embodiment, the adjuvant comprises: at least one of dispersing agent, antifreezing agent, thickening agent, defoaming agent, penetration enhancer, disintegrating agent, solvent and filler. Specifically, the dispersant comprises: at least one of polycarboxylate, lignosulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene, fatty acid polyoxyethylene, fatty amine polyoxyethylene and glycerol polyoxyethylene fatty acid ester, wherein the antifreeze comprises: at least one of ethylene glycol, propylene glycol and glycerol, the thickener comprising: at least one of xanthan gum, carboxymethyl cellulose, carboxyethyl cellulose, methyl cellulose, magnesium aluminum silicate, and polyvinyl alcohol, the antifoaming agent comprising: at least one of silicone oil, a silicone defoaming agent and C8-10 fatty alcohol, wherein the penetration enhancer comprises: at least one of sodium dodecyl sulfate, calcium dodecyl benzene sulfonate, nekal BX, alkylbenzene sulfonate, polyoxyethylene triphenyl-ethylene phenyl phosphate, Chinese honeylocust fruit powder, silkworm excrement and soapberry powder, wherein the disintegrating agent comprises: at least one of bentonite, urea, ammonium sulfate, aluminum chloride, citric acid, succinic acid, and sodium bicarbonate, the filler comprising: at least one of kaolin, diatomite, attapulgite, white carbon black, starch and light calcium carbonate.
In one embodiment, the acaricidal composition comprises, in parts by mass: 1 to 25 portions of flonicamid, 1 to 25 portions of alkyl ethyl sulfonate, 3 to 8 portions of dispersant, 1 to 5 portions of antifreeze, 0.1 to 2 portions of thickener, 0.1 to 0.8 portion of defoamer and 40 to 70 portions of solvent. Specifically, the acaricidal composition is a suspending agent, and is prepared by adding 3-8 parts by mass of a dispersing agent, 1-5 parts by mass of an antifreezing agent, 0.1-2 parts by mass of a thickening agent, 0.1-0.8 part by mass of an antifoaming agent and part of a solvent into a stirrer, and uniformly stirring and mixing to obtain a premix; then, uniformly stirring and mixing the fluazinam, the alkyl ethyl sulfonate and the balance of the solvent according to the proportion to obtain a mixture, mixing the mixture and the premix, adding the mixture and the premix into a ball grinding machine, and carrying out ball grinding operation for 2-5 h to obtain the acaricidal composition with the particle diameter of less than 5 mm.
In one embodiment, the acaricidal composition comprises, in parts by mass: 1 to 25 parts of flonicamid, 1 to 25 parts of alkyl ethyl sulfonate, 3 to 10 parts of dispersant, 1 to 10 parts of wetting agent, 1 to 5 parts of disintegrating agent and 0.9 to 5 parts of filler. Specifically, the dosage form of the acaricidal composition is water dispersible granules, and the acaricidal composition is prepared by adding 1-25 parts of fluazinam, 1-25 parts of alkyl ethyl sulfonate, 3-10 parts of dispersing agent, 1-10 parts of penetration enhancer, 1-5 parts of disintegrant and 1-10 parts of filler into a stirrer, mixing and stirring, adding into an ultramicro jet mill, crushing, adding into a kneader, kneading, adding into a fluidized bed granulation dryer, granulating and drying.
In order to improve the utilization rate of the acaricide composition, in one embodiment, the acaricide composition further comprises the following components in parts by mass: 5 to 13 parts of modified nano titanium dioxide sol. Specifically, the modified nano titanium dioxide sol is a composite system and is prepared from inorganic materials of chitosan selenium and nano titanium dioxide sol, the chitosan has the advantages of good film forming property, permeability, hygroscopicity and moisture retention, the film forming time on the leaf surface is longer, the sterilization and antibacterial properties and the pesticide residue degradation capability of titanium dioxide and chitosan can be exerted for a long time, meanwhile, selenium can rapidly enter plant cells under the photosynthesis of plants, the rejection function of the cells can be added, the disease and pest resistance of the plants can be improved, the aging and the breakage of pesticide molecular chains in the plant cells can be accelerated, the pesticide residue in crops can be greatly reduced, the nano titanium dioxide has very high photocatalytic activity, various organic pollutants can be degraded in a non-selective manner, various bacteria and viruses can be killed, the modified nano titanium dioxide sol also has the advantages of no toxicity and no harm, and a thin layer is formed on the surface of plant leaves, can form active free radicals under the illumination condition, kill mites, bacteria and fungi, and accelerate the degradation rate of residual pesticides, thereby reducing the pesticide residue content of plants.
The insect-resistant effect can be further improved by adding the modified nano titanium dioxide sol, fungi, bacteria and spores thereof can be effectively killed at a lower temperature, but with the increase of the content of the modified nano titanium dioxide sol, a large amount of hydroxyl free radicals with extremely strong oxidizing capability can be generated, the hydroxyl free radicals are gradually released through the chitosan selenium shell, chemical bonds of fluazinam and alkyl ethyl sulfonate can be damaged, the acaricidal effect of the floazinam and the alkyl ethyl sulfonate is reduced, the content of the modified nano titanium dioxide sol is too low, the insect-resistant effect of the acaricidal composition is reduced, and finally the residues of the fluazinam and the alkyl ethyl sulfonate on plants cannot be effectively eliminated, in the embodiment, the modified nano titanium dioxide sol is in the range of 5-13 parts by weight, the bactericidal composition can not only have a synergistic effect with fluazinam and alkyl ethyl sulfonate and have a good control effect on panonychus citri within a large temperature range, but also gradually remove pesticide residues on plant leaves along with the gradual release of the chitosan selenium shell on the nano titanium dioxide, degrade various organic pollutants and achieve the effect of no pesticide residues.
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto. All the raw materials and reagents in the present invention are commercially available conventional raw materials and reagents unless otherwise specified. In the examples, the components are used in g and mL in parts by mass.
Examples 1 to 8 and comparative examples 1 to 7
The miticidal compositions of examples 1 to 8 and comparative examples 1 to 7, wherein the miticidal composition comprises the components shown in table 1 in parts by mass.
TABLE 1 acaricidal composition Components of examples 1-8
TABLE 2 acaricidal compositions of comparative examples 1-7
The formulations of examples 1-3, examples 6-8 in Table 1 and comparative examples 1-7 in Table 2 were prepared according to the following procedure:
(1) adding fluazinam, alkyl ethyl sulfonate and a part of water into a stirrer according to a proportion, and uniformly stirring and mixing to obtain a premix;
(2) adding the polycarboxylate, the ethylene glycol, the xanthan gum, the silicone oil and the balance of water into a stirrer in proportion, uniformly stirring and mixing to obtain a mixture, adding the mixture and the premix into a ball grinding machine, carrying out ball grinding operation, and controlling the ball grinding time to be 2.5h to obtain the acaricidal composition of the embodiment 1-3, wherein the acaricidal composition is in a suspending agent shape.
The formulations of examples 4-5 in table 1 were prepared according to the following procedure:
(1) adding fluazinam, alkyl ethyl sulfonate, polycarboxylate, glycol, sodium dodecyl sulfate, urea, kaolin and modified wood dust powder into a stirrer according to a proportion, and uniformly stirring and mixing to obtain a mixed material;
(2) adding the mixed material into an ultramicro jet mill, carrying out crushing operation, adding the mixed material into a kneader, carrying out kneading operation, then adding the kneaded material into a fluidized bed granulation dryer, and carrying out granulation and drying to obtain the acaricidal composition of examples 4-5, wherein the acaricidal composition is in the form of water dispersible granules.
The processing method of the modified nano titanium dioxide sol in the embodiments 1 to 8 and the comparative examples 1 to 7 includes providing a chitosan selenium solution and a nano titanium dioxide sol, and mixing and stirring the nano titanium dioxide sol and the chitosan selenium solution to obtain the modified nano titanium dioxide sol.
The providing of the chitosan selenium solution comprises: dissolving 3.5-7 parts of sodium selenite in 500-700 parts of water to obtain a sodium selenite solution, adding 1-3 parts of a protective agent into the sodium selenite solution, uniformly stirring, then dropwise adding a reducing agent under an ultrasonic condition to obtain nano selenium sol, finally dropwise adding a chitosan quaternary ammonium salt solution into the nano selenium sol, and stirring for 20-40 min to obtain the chitosan selenium solution.
The providing of the nano titania sol includes: adding 20-50 parts of hydrated titanium dioxide into 500-1400 parts of water, adding 20-70 parts of dilute sulfuric acid, stirring and fully dissolving to obtain a nano titanium dioxide solution, adding a pH regulator into the nano titanium dioxide solution, regulating the pH value to 9-11, centrifuging, taking a precipitate, adding 600-2000 parts of water to dissolve to form a nano titanium dioxide suspension, adding 50-70 parts of hydrogen peroxide into the nano titanium dioxide suspension, heating and stirring for 3-8 hours, adding the pH regulator, and regulating the pH value to 7 to obtain the nano titanium dioxide sol.
According to the proportion that selenium and titanium in the chitosan selenium solution and the nano titanium dioxide sol are 0.3-0.7: mixing the nano titanium dioxide sol and the chitosan selenium solution according to the molar ratio of 100.
Comprehensive toxicity determination:
the acaricidal compositions prepared in examples 1 to 8 and comparative examples 1 to 7 were used as examples to perform comprehensive toxicity measurement.
The determination method comprises the following steps: with reference to the method in NY/T1154.12-2008 standard, the slide dipping method was employed.
The Panonychus ulmi Luck is used as a test target. Cutting the double-sided adhesive tape into 2cm long, sticking the double-sided adhesive tape to one end of a glass slide, selecting healthy nymphs with consistent physiological state, sticking the backs of the nymphs to the double-sided adhesive tape, wherein the sticking of mite feet, tentacles and mouthparts is avoided, placing 30 heads of each nymph into a container padded with wet sponge, covering the container with a cover, and placing the container at the temperature of 25 +/-1 ℃. After 2 hours microscopic examination, dead and injured individuals were removed and 30 heads of each piece were replenished. Immersing the glass slide with the adhered nymph mites in the test liquid medicine, slightly shaking the glass slide, taking out after 5s of immersion, absorbing the redundant liquid medicine by using absorbent paper, putting the glass slide into a white porcelain plate padded with wet sponge, covering the glass slide with a plastic film with good light transmittance, and finally placing the glass slide in an incubator at the temperature of 25 +/-1 ℃ and with the illumination period of L: D ═ (16:8) h for culture. Each treatment was set up in 4 replicates and the set-up immersion in clear water was used as a blank. Among them, test data was counted after 3 days, and mortality (%) and corrected mortality (%) were calculated. If the control mortality is lower than 5%, no correction is needed; if the control mortality rate is between 5% and 20%, correction is needed; if the control mortality is greater than 20%, the test needs to be redone.
Respectively establishing a toxicity regression equation by taking the logarithmic value of the medicament concentration (mg/L) as an independent variable x and the probability value of correcting the death rate as a dependent variable y, and calculating LC50 and the co-toxicity coefficient of the mixed medicament thereof by adopting DPS software.
Calculating the formula:
the Theoretical Toxicity Index (TTI) of mixed preparation is toxicity index of A medicine and the percentage content of A medicine in 100 mixed preparation
+ virulence index of the drug B x 100 percent of the drug in the mixture
TABLE 3 comprehensive virulence measurement results of examples 1 to 8 and comparative examples 1 to 7
LC50 (lethality Concentration 50) is the Concentration of toxicant that causes half of the test animals to die in the animal acute toxicity test, the co-toxicity coefficient (CTC) is an index that measures whether the pesticide mixture has synergistic effect, the co-toxicity coefficient is the measured toxicity index/theoretical toxicity index × 100, specifically, the co-toxicity coefficient (CTC) is greater than or equal to 120, which shows synergistic effect; the co-toxicity coefficient (CTC) is less than or equal to 80, and the antagonism is shown; 80 < co-toxicity coefficient (CTC) < 120 showed additive effects.
As can be seen from the data in the table 3, the fluazinam and the alkyl ethyl sulfonate are compounded to be used as the effective components of the acaricidal composition, so that the acaricidal composition which is low in lethal concentration, high in safety and high in co-toxicity coefficient greater than 120 can be obtained, and the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.2-5: 1, when the mass ratio of fluazinam to alkyl ethyl sulfonate is 1: 1, the synergistic effect is most obvious, and the cotoxicity coefficient is highest.
And (3) field test:
the test method comprises the following steps: taking the acaricidal compositions prepared in examples 1-8 and comparative examples 1-7 as examples to perform field pesticide application tests, setting a blank control group, carrying out no pesticide application treatment, wherein the test site is located in Longzon Tongpan village of Lingzhou city, Guangdong province, the tree age of the citrus trees is 5 years, 55 citrus trees are planted in each mu, the acaricidal composition is diluted by water to spray the citrus, the liquid spraying amount per mu is 110L, then the population base number of the panonychus citri mites is counted respectively 3 days and 7 days before pesticide application and after pesticide application, and the control effect is calculated.
The drug effect calculation method comprises the following steps:
TABLE 4 field test results for the control of Panonychus citri
As can be seen from table 4, in the comparison between examples 1 to 8 and comparative examples 1 to 2, the effect of the combination of fluazinam and alkyl ethyl sulfonate on the control of panonychus citri is better than that of the control of each single agent, the control effect of single fluazinam or alkyl ethyl sulfonate is lower, but the drug effect after combination is remarkably improved, and the control effect is remarkably improved, wherein the control effect of example 1 is the best, that is, when the mass ratio of fluazinam to alkyl ethyl sulfonate is 1: 1, the fluazinam and the alkyl ethyl sulfonate are compounded, so that the population base of panonychus citri can be obviously reduced, the control effect reaches 93.33% 7 days after the pesticide is applied, the control effect is obviously improved, the use dosage of the pesticide can be reduced, the influence of the pesticide on the environment is reduced, and the pesticide application cost is reduced.
Further, as can be seen from comparison between the example 1 and the comparative examples 1 to 7, the addition of the modified nano titanium dioxide sol can further improve the pest resistance effect, and can effectively kill fungi, bacteria and spores thereof at a lower temperature, but with the increase of the content of the modified nano titanium dioxide sol, a large number of hydroxyl radicals with extremely strong oxidizing ability are generated, the hydroxyl radicals are gradually released through the chitosan selenium shell, the chemical bonds of fluazinam and alkyl ethyl sulfonate are destroyed, so that the mite killing effect of the fluazinam and alkyl ethyl sulfonate is reduced, the content of the modified nano titanium dioxide sol is too low, so that the pest resistance effect of the mite killing composition is reduced, and finally the residue of the fluazinam and alkyl ethyl sulfonate on plants cannot be effectively eliminated, so that the mite killing composition in the example 1, the bactericidal composition can not only have a synergistic effect with fluazinam and alkyl ethyl sulfonate and have a good control effect on panonychus citri within a large temperature range, but also can gradually remove pesticide residues on plant leaves along with the gradual release of the chitosan selenium shell on the nano titanium dioxide, degrade various organic pollutants and achieve the effect of no pesticide residues.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the protection scope of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An acaricidal composition comprising: the composition comprises fluazinam, alkyl ethyl sulfonate and an auxiliary agent, wherein the mass ratio of the fluazinam to the alkyl ethyl sulfonate is 0.2-5: 1.
2. an acaricidal composition according to claim 1, wherein the mass ratio of fluazinam to the alkyl ethyl sulfonate is 0.3-3: 1.
3. an acaricidal composition according to claim 1, characterized in that said adjuvant comprises: at least one of dispersing agent, antifreezing agent, thickening agent, defoaming agent, penetration enhancer, disintegrating agent, solvent and filler.
4. An acaricidal composition according to claim 3, characterized in that it comprises, in parts by mass: 1 to 25 parts of fluazinam, 1 to 25 parts of alkyl ethyl sulfonate, 3 to 8 parts of dispersant, 1 to 5 parts of antifreeze, 0.1 to 2 parts of thickener, 0.1 to 0.8 part of defoamer and 40 to 70 parts of solvent.
5. An acaricidal composition according to claim 3, characterized in that it comprises, in parts by mass: 1 to 25 parts of fluazinam, 1 to 25 parts of alkyl ethyl sulfonate, 3 to 10 parts of dispersant, 1 to 10 parts of wetting agent, 1 to 5 parts of disintegrant and 0.9 to 5 parts of filler.
6. An acaricidal composition according to claim 4 or 5, characterized by further comprising, in parts by mass: 5 to 13 parts of modified nano titanium dioxide sol.
7. The acaricidal composition according to claim 6, wherein the modified nano titanium dioxide sol is prepared by providing a chitosan selenium solution and a nano titanium dioxide sol, and mixing and stirring the nano titanium dioxide sol and the chitosan selenium solution to obtain the modified nano titanium dioxide sol.
8. The acaricidal composition according to claim 7, wherein said providing a selenium solution of chitosan comprises: dissolving 3.5-7 parts of sodium selenite in 500-700 parts of water to obtain a sodium selenite solution, adding 1-3 parts of a protective agent into the sodium selenite solution, uniformly stirring, then dropwise adding a reducing agent under an ultrasonic condition to obtain nano selenium sol, finally dropwise adding a chitosan quaternary ammonium salt solution into the nano selenium sol, and stirring for 20-40 min to obtain the chitosan selenium solution.
9. An acaricidal composition according to claim 7, characterized in that said providing of a nano-titania sol comprises: adding 20-50 parts of hydrated titanium dioxide into 500-1400 parts of water, adding 20-70 parts of dilute sulfuric acid, stirring and fully dissolving to obtain a nano titanium dioxide solution, adding a pH regulator into the nano titanium dioxide solution, regulating the pH value to 9-11, centrifuging to obtain a precipitate, adding 600-2000 parts of water to dissolve to form a nano titanium dioxide suspension, adding 50-70 parts of hydrogen peroxide into the nano titanium dioxide suspension, heating and stirring for 3-8 hours, adding the pH regulator, and regulating the pH value to 7 to obtain the nano titanium dioxide sol.
10. The acaricidal composition according to claim 7, wherein the mixing and stirring of the nano-titania sol with the selenium chitosan solution comprises:
according to the proportion that selenium and titanium in the chitosan selenium solution and the nano titanium dioxide sol are 0.3-0.7: mixing the nano titanium dioxide sol and the chitosan selenium solution according to the molar ratio of 100.
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| JP2000281511A (en) * | 1999-03-25 | 2000-10-10 | Sekisui Chem Co Ltd | Acaricide and acaricidal spray |
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| CN109511655A (en) * | 2017-09-18 | 2019-03-26 | 沈阳中化农药化工研发有限公司 | A kind of bactericidal composition |
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| JP2000281511A (en) * | 1999-03-25 | 2000-10-10 | Sekisui Chem Co Ltd | Acaricide and acaricidal spray |
| CN1486606A (en) * | 2003-07-30 | 2004-04-07 | 湖南化工研究院 | Aqueous nano pesticide suspension containing effective pesticidal component and its prepn process |
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| CN109511655A (en) * | 2017-09-18 | 2019-03-26 | 沈阳中化农药化工研发有限公司 | A kind of bactericidal composition |
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