CN110214779B - Sterilization composition containing metalaxyl and sodium diquat - Google Patents
Sterilization composition containing metalaxyl and sodium diquat Download PDFInfo
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- CN110214779B CN110214779B CN201910557956.4A CN201910557956A CN110214779B CN 110214779 B CN110214779 B CN 110214779B CN 201910557956 A CN201910557956 A CN 201910557956A CN 110214779 B CN110214779 B CN 110214779B
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- 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
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
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- 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
- A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
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- Pest Control & Pesticides (AREA)
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Abstract
The invention discloses a bactericidal composition containing metalaxyl and sodium diquat, which comprises the effective components of metalaxyl and sodium diquat in a mass ratio of 1: 50-1: 30. The bactericidal composition provided by the invention has better control effect on crop oomycete diseases, has obvious synergistic effect between two medicaments, has obviously higher control effect than the use of a single medicament, reduces the use amount and production cost of pesticides, reduces environmental pollution, overcomes and delays the drug resistance of pathogenic bacteria, and has important significance on comprehensive treatment of the resistance of the pathogenic bacteria.
Description
Technical Field
The invention belongs to the field of pesticide compounding, and relates to a bactericidal composition containing metalaxyl and sodium diquat for preventing and treating oomycete diseases of crops.
Background
Metalaxyl, common english name: metalaxyl, formula: C15H21NO4, molecular weight: 279.33. metalaxyl belongs to phenylamide type high-efficiency, low-toxicity, low-residue and systemic bactericides, has strong systemic and osmotic capacities and long efficacy duration, mainly inhibits the synthesis of protein in pathogenic bacteria mycelia, causes the pathogenic bacteria mycelia to lack nutrition and die due to abnormal growth, and has good control effect on crop diseases caused by peronospora parasitica, phytophthora parasitica and pythium parasitica. The drug is used singly for a long time, and the drug resistance of germs is easy to generate.
Sodium diurethane, common english name: fenaminosulf, molecular formula: C8H10N3O3SNa, alternative name: the dikesong, the dekesong and the ground refreshing have special effects on diseases caused by pythium and ascomyces, have growth stimulation effect on crops, and are suitable for crops such as vegetables, sweet rice, wheat, pineapples, rice, tobacco, cotton and the like. Preventing and treating rice blast, bakanae disease of rice, rust disease, damping-off, powdery mildew, epidemic disease, black spot, anthracnose, downy mildew, damping off, root rot and stem rot, and stinking smut, stinking smut and the like of wheat of grain crops.
In recent years, due to the use of a single medicament for a long time and an unscientific application mode, the problem of drug resistance of pathogenic bacteria is particularly outstanding, the drug effect is reduced, diseases are serious, and the application amount is gradually increased, so that the residue of agricultural products is seriously exceeded, the production cost is increased, the environmental pollution is aggravated, and the quality of life of human is reduced. In order to eliminate or delay the drug resistance of pathogenic bacteria, improve the drug effect, reduce the cost and reduce the environmental pollution, research and development of new pesticide varieties which are efficient, low-toxicity and environment-friendly are urgently needed, and the compounding of the pesticide is one of the most convenient and effective methods.
Chinese patent CN93117114.8 discloses a broad-spectrum high-efficiency plant bactericide and a preparation method thereof. Consists of carbendazim, mancozeb, metalaxyl, fenaminosulf and medical potassium permanganate. The bactericide has good control effects on downy mildew, phytophthora, pythium, polysaccharomycetes, adelomycetes and the like, has low toxicity and wide application range, can be mainly used for flue-cured tobacco, and can also be used for controlling various diseases such as hot pepper, watermelon, eggplant, tomato and the like, and particularly has remarkable effect on mixed diseases. The invention has the advantages of wide bactericidal spectrum, high control effect, difficult generation of resistance of germs, simple use method, flexible application suitable period, sufficient raw materials, low cost, and good popularization value and market prospect.
Chinese patent CN201410237874.9 discloses a plant bactericidal composition and a preparation method thereof, wherein the plant bactericidal composition comprises metalaxyl, fenaminosulf and pharmaceutical potassium permanganate, and the percentage (%) of active ingredients is as follows: 19-24 parts of carbendazim, 11-16 parts of mancozeb, 0.8-1.2 parts of metalaxyl, 15-20 parts of fenaminosulf and 4-6 parts of pharmaceutical grade potassium permanganate. The carbendazim, mancozeb, metalaxyl and dexon are crushed and then pass through potassium permanganate crystals with 100 meshes, and the materials are respectively weighed and fed, and when the components are prepared, the percentage of active ingredients is as follows: 19-24 parts of carbendazim, 11-16 parts of mancozeb, 0.8-1.2 parts of metalaxyl, 15-20 parts of fenaminosulf and 4-6 parts of pharmaceutical grade potassium permanganate, and stirring the components by a mixer for 4-12 minutes.
However, the compound sterilization composition has the defects of numerous compound components, high cost, complex use and operation and the like.
Disclosure of Invention
The invention aims to provide a bactericidal composition containing metalaxyl and sodium diquat, which has the advantages of high efficiency, low toxicity, low cost, environmental protection, delaying of the drug resistance of pathogenic bacteria and effective prevention and control of oomycete diseases of crops.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the bactericidal composition containing metalaxyl and sodium diquat has the effective components of metalaxyl and sodium diquat in a mass ratio of 1: 50-1: 30, preferably 1: 30-1: 20, and the effective components of metalaxyl and sodium diquat in the dosage form are 2-80% by mass, preferably 10-50% by mass.
The bactericidal composition takes metalaxyl and sodium disulfate as main active ingredients and is compounded with known additives into any formulation allowed by pesticides. The auxiliary agent comprises one or more of carrier, filler, stabilizer, solvent, dispersant, defoamer, synergist, thickener, wetting agent, pH regulator, emulsifier and the like, which are known substances, such as kaolin, talcum powder, calcium dodecyl benzene sulfonate, fatty amine polyoxyethylene ether, alkylphenol polyoxyethylene, phenethyl phenol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty acid ethylene oxide addition product, polyoxyethylene polyoxypropylene block compound, tween series, gelatin, mineral oil, polyethylene glycol, sulfate, sulfonate, phosphate, 1, 2-butanediol, lignosulfonate, xanthan gum, polyoxyethylene trisiloxane, phenol formaldehyde condensate, ammonium salt, alkylbenzene sulfonate, alkyl naphthalene sulfonate, phosphite, casein and the like.
The dosage form of the bactericidal composition is suspending agent, missible oil, aqueous emulsion, wettable powder, water dispersible granules or microemulsion.
The bactericidal composition containing metalaxyl and sodium diquat is applied to prevention and treatment of oomycetes diseases of crops.
The inventor of the application discovers that metalaxyl and sodium diquat have an obvious synergistic effect in the aspect of inhibiting the oomycete diseases of crops after being compounded according to a certain proportion through indoor bioassay and field efficacy tests, and further researches prove that the invention is completed. The bactericidal composition provided by the invention has better control effect on crop oomycete diseases, has obvious synergistic effect between two medicaments, has obviously higher control effect than the use of a single medicament, reduces the use amount and production cost of pesticides, reduces environmental pollution, overcomes and delays the drug resistance of pathogenic bacteria, and has important significance on comprehensive treatment of the resistance of the pathogenic bacteria.
The invention has the beneficial effects that:
1. the binary compound bactericidal composition provided by the invention can generate obvious synergistic effect in a certain proportion range, so that the use amount of pesticides is reduced, the production cost is reduced, and the ecological environment is improved.
2. The two effective components of the binary compound bactericidal composition provided by the invention have different action mechanisms, and can eliminate or delay the generation of resistance of pathogenic bacteria to a single medicament.
3. The binary compound bactericidal composition provided by the invention is simple to use, reduces the production and use cost, and is safe to crops.
Detailed Description
In order to make the invention more comprehensible, the following examples are given for illustration. The contents of the examples are not to be considered as limiting the invention, and the examples are only used for describing the invention, and the protection scope of the patent of the invention is subject to the claims.
The percentages in the examples are by weight.
Indoor biological activity determination:
the biological activities of Phytophthora capsici and Peronospora cucumerinum were measured indoors, but not limited thereto. Calculating EC of different agents (single agent and mixed agent) on strain by using DPS software50Value, co-toxicity coefficient (CTC) was calculated according to the Sun cloud Peel method, using a single dose of the combination as the standard (EC was usually chosen)50Lower value) to evaluate the interaction of the mixture, and the specific calculation method is as follows:
single dose toxicity index (ATI) ═ standard agent EC50Single agent EC50)×100
Measured virulence index (ATI) of the combination (EC for standard single dose)50EC of value/blend50Value) × 100
The theoretical virulence index (TTI) of the mixed preparation is A single virulence index, the percentage content of A in the mixed preparation + B single virulence index, and the percentage content of B in the mixed preparation
Co-toxicity coefficient (CTC) of the mixture (measured virulence index of the mixture/theoretical virulence index of the mixture) × 100
When the co-toxicity coefficient (CTC) is more than or equal to 120, the mixture has a synergistic effect, when the co-toxicity coefficient (CTC) is less than or equal to 80, the mixture has an antagonistic effect, and when the co-toxicity coefficient (CTC) is less than 80, the mixture has an additive effect.
And (3) measuring the biological activity of phytophthora capsici: a hypha growth rate method is adopted. Performing preliminary measurement, transferring the strain to be measured into a drug-containing culture medium for plate culture for 6 days, and designing the series gradient concentration of the drug according to the growth condition. Culturing the strain on oat agar medium at 25 deg.C for 5d, punching bacterial cakes on the same circumference of colony edge with a punch with diameter of 6mm, respectively inoculating the bacterial cakes on the oat agar medium plate containing the above-mentioned concentration of medicinal agent, and measuring the diameter of each treated colony (the diameter of bacterial colony minus the diameter of bacterial cake) after culturing at 25 deg.C for 6d with no medicinal agent as control, and repeating for 3 times. The percentage (%) of inhibition of hypha growth by each drug concentration was determined, and the percentage (%) of inhibition was [ (control colony growth diameter-treated colony growth diameter)/control colony growth diameter]X 100%. Converting the inhibition rate into a several-degree value, solving a virulence regression equation y ═ a + bx, and calculating the effective inhibition medium concentration EC of the medicament according to the virulence regression equation50(μ g/ml), correlation coefficient (r), results of the experiment are shown in Table 1.
Determination of biological activity of cucumber downy mildew: in the test, an in-vitro leaf disc floating method is adopted, true leaves with consistent growth on healthy cucumber plants are selected, leaf discs with the diameter of 2.0cm are manufactured, the leaf discs are placed in a culture dish with the diameter of 9cm, 15mL of liquid medicines with different series concentrations are added for soaking for 1-1.5 h, the back faces of the leaf discs face upwards, distilled water is added as a control, and each treatment is repeated for 3 times. Then the concentration is 2X 103Each.ml-1Dripping 10 mu L of the sporangium suspension liquid into one drop, inoculating the sporangium suspension liquid in the center of a leaf disc, placing the sporangium suspension liquid in an incubator for culture (keeping the relative humidity at 100%, the temperature at 15-20 ℃, and the light/dark for 12h/12h), keeping the relative humidity at more than 80%, the temperature at 15-24 ℃, and the light/dark for 12h/12h after 24h, measuring the area of scabs on the leaf disc after 7d, and calculating the disease index and the prevention and treatment effect. Using DPS software to perform linear regression analysis between the concentration of the medicament and the control effect, and calculating the effective inhibition intermediate concentration EC of the medicament on the strain50(μ g/ml), correlation coefficient (r), results of the experiment are shown in Table 2.
TABLE 1 toxicity test results of metalaxyl and sodium diquat in different proportions for pepper phytophthora blight
As can be seen from Table 1, the composition of metalaxyl and sodium diquat has synergistic effect on the phytophthora capsici in the ratio of 15:1 to 1:15, wherein the synergistic effect is most significant between 15:1 and 5: 1.
TABLE 2 toxicity test results of metalaxyl and sodium dixate at different ratios for cucumber downy mildew
As can be seen from Table 2, the inhibition effect of the composition of metalaxyl and sodium diquat on cucumber downy mildew is synergistic within the ratio of 15:1 to 1:15, wherein the synergistic effect is most remarkable at 1:1 and 1: 3.
In addition, the composition is not synergistic when the compounding ratio of metalaxyl and sodium sulfadiazine is less than 1:30 or more than 50:1, and the calculated cotoxicity coefficient is less than 120.
The two effective components of metalaxyl and sodium disulfate can be processed into any one pesticide allowable dosage form, and the preparation prepared by processing the two effective components and the control effect in the field are illustrated by specific examples, but the processed preparation is not limited to the following list.
Example 1: 32% metalaxyl-sodium diben suspension
The 32 percent metalaxyl-sodium disulfate suspending agent is prepared by the raw materials under the action of a grinding machine according to a method for preparing the suspending agent. The dosage of the preparation per mu is 40 g, and the control effect is 83.59% and 79.63% respectively after the preparation is applied for 7 days.
Example 2: 44% metalaxyl-sodium disulfate emulsifiable solution
The raw materials are put into a mixing kettle according to a method for preparing emulsifiable solution to prepare the 44 percent metalaxyl-sodium disulfate emulsifiable solution. The dosage of the preparation per mu is 35 g for preventing and treating the pepper phytophthora blight and the cucumber downy mildew, and the control effect is 81.71 percent and 80.02 percent respectively after the preparation is applied for 7 days.
Example 3: 48% metalaxyl-sodium diben emulsion in water
The raw materials are put into a mixing kettle according to a method for preparing the aqueous emulsion, and are mixed and sheared at a high speed to prepare the 48 percent metalaxyl-sodium diben aqueous emulsion. The dosage of the preparation per mu is 40 g, and the control effect is respectively 87.62% and 83.45% 7 days after the preparation is applied.
Example 4: 20% metalaxyl-sodium diben emulsion in water
The raw materials are put into a mixing kettle according to a method for preparing the aqueous emulsion, and are mixed and sheared at a high speed to prepare the 20 percent metalaxyl-sodium diquat aqueous emulsion. The dosage of the preparation per mu is 50 g, and the control effect is 80.98% and 83.70% respectively after the preparation is applied for 7 days.
Example 5: 60% metalaxyl-sodium disulfate wettable powder
The 60 percent metalaxyl-sodium disulfate wettable powder is prepared by mixing the raw materials according to a method for preparing the wettable powder, and then carrying out air flow crushing, uniform stirring, drying and the like on the mixture. The dosage of the preparation per mu is 40 g, and the control effect is 79.23% and 81.56% respectively after the preparation is applied for 7 days.
Example 6: wettable pulvis of metalaxyl and sodium diquat with concentration of 48%
The raw materials are mixed according to a method for preparing the wettable powder, and then are subjected to airflow crushing, uniform stirring, drying and the like to prepare the 48 percent metalaxyl-sodium disulfate wettable powder. The dosage of the preparation is 35 g per mu, the control effect is 88.54 percent and 85.60 percent respectively after the preparation is applied for 7 days.
Example 7: 18% metalaxyl-sodium disulfate water dispersible granule
The raw materials are crushed, granulated, dried and screened according to a method for preparing the water dispersible granule, and then the 18 percent metalaxyl-sodium disulfate water dispersible granule can be prepared. The dosage of the preparation per mu is 50 g, and the control effect is 84.07 percent and 78.24 percent respectively after the preparation is applied for 7 days.
Example 8: 33% metalaxyl-sodium disulfate water dispersible granule
The raw materials are crushed, granulated, dried and screened according to a method for preparing the water dispersible granule, and then the 33 percent metalaxyl-sodium disulfate water dispersible granule can be prepared. The dosage of the preparation per mu is 40 g, and the control effect is 85.26% and 80.81% respectively after the preparation is applied for 7 days.
Example 9: 16% metalaxyl-sodium diben microemulsion
The materials are put into a mixing kettle according to the method for preparing the microemulsion and are fully mixed and stirred to prepare the 16 percent metalaxyl-sodium disulfate microemulsion. The dosage of the preparation per mu is 45 g, and the control effect is 81.16% and 77.95% respectively after the preparation is applied for 7 days.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The bactericidal composition containing metalaxyl and sodium diquat is characterized in that: the composition comprises the following components in percentage by mass:
metalaxyl 12%
36 percent of sodium diuron
8 percent of sodium lignosulfonate
Sodium methylene dinaphthalenesulfonate 6%
5 percent of white carbon black
The balance of kaolin.
2. The use of the bactericidal composition containing metalaxyl and sodium diquat as claimed in claim 1 for preventing and treating phytophthora capsici and downy mildew of cucumber.
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| CN107459509A (en) * | 2016-06-06 | 2017-12-12 | 南开大学 | A kind of nitrogenous sulfur-bearing sulfimide derivative and its production and use |
| CN108887283A (en) * | 2018-06-21 | 2018-11-27 | 徐州丰润生物有机肥料科技发展有限公司 | A kind of dedicated pesticide of potato |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084350A (en) * | 1993-09-06 | 1994-03-30 | 云南省农业科学院植物保护研究所 | Broad-spectrum efficient bactericide and method for making |
| CN1141720A (en) * | 1996-07-02 | 1997-02-05 | 湖南省园艺研究所 | Covering agent for hot pepper and water melon seed |
| CN1268499A (en) * | 2000-04-13 | 2000-10-04 | 王玉山 | Seedling-strengthening agent for growing rice seedlings |
| WO2012069652A2 (en) * | 2010-11-26 | 2012-05-31 | Syngenta Participations Ag | Fungicide mixtures |
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