CN114424772A - Weeding composition containing dithiopyr and halosulfuron-methyl - Google Patents
Weeding composition containing dithiopyr and halosulfuron-methyl Download PDFInfo
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- CN114424772A CN114424772A CN202210162367.8A CN202210162367A CN114424772A CN 114424772 A CN114424772 A CN 114424772A CN 202210162367 A CN202210162367 A CN 202210162367A CN 114424772 A CN114424772 A CN 114424772A
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- halosulfuron
- methyl
- dithiopyr
- weeds
- weeding composition
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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
- 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
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a weeding composition containing dithiopyr and halosulfuron-methyl, belonging to the technical field of pesticides. The weeding composition takes the dithiopyr and the halosulfuron-methyl as effective components, wherein the mass ratio of the dithiopyr to the halosulfuron-methyl is (1-9) to (1-9). The weeding composition prepared by compounding the dithiopyr and the halosulfuron-methyl is applied to the paddy field, the weed control effect of the weeding composition is obviously superior to the sum of the theoretical effects of single agents, the weed control activity is improved under the condition that the using amount of the effective components is reduced, and the weeding composition has a super-additive effect.
Description
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition containing dithiopyr and halosulfuron-methyl.
Background
In crop farming, protection of crops by controlling weeds that inhibit the growth of crops is an extremely important means. To reduce damage caused by weeds growing in cultivated areas, such as crop growth or yield loss, researchers have developed active herbicidal substances that are effective in controlling weeds and safe for crops. These herbicidally active substances, which are used to control weeds growing in the cultivation area of a particular crop, preferably have a high herbicidal activity and a broad herbicidal spectrum, and are safe to the environment and to the crop.
Dithiopyr belongs to pyridine carboxylic acid herbicides. The herbicide is used for weeding in paddy fields and lawns, and can control annual weeds such as barnyard grass, monochoria vaginalis, cyperus heterophylla, arthroncus, alisma angustifolia and the like by applying 0.06kg (a.i.) of/ha before germination and applying 0.12kg (a.i.) of/ha after germination (in the 1.5 leaf period of the barnyard grass). But not against firefly rush, Hydrocotyle, Guapian and Pseudobulbus Cremastrae Seu pleiones. The herbicidal activity of the herbicide is not affected by the change of environmental factors, and the herbicide is safe to rice and has a lasting period of 80 days. The weeding composition is applied before lawn emergence, the dosage is 0.36-0.50 kg (a.i.)/ha, and the weeding composition can prevent and kill annual gramineous weeds such as red crabgrass, purple crabgrass and the like and annual broadleaf weeds such as white fungus, sedum bulbiferum, lacca and the like.
The halosulfuron-methyl is widely applicable to crops, can be used for wheat, corn, sorghum, rice, sugarcane, tomato, sweet potato, dried bean, lawn and ornamental crops, has special effect on malignant weed cyperus rotundus, and can prevent and remove part of broadleaf weeds. The fresh weight inhibition rate of halosulfuron-methyl on common weeds in paddy fields, such as amaranth, monochoria vaginalis, cyperus rotundus and cyperus esculentus, is over 90 percent, but the halosulfuron-methyl is basically ineffective on gramineous weeds.
At present, the herbicide is limited by the safety of crops, the weed control spectrum is limited, the occurrence of weeds in the crops cannot be completely and effectively controlled by singly using a single herbicide, and residual toxicity to peripheral crops or succeeding crops is easily caused by some herbicides due to large water solubility, long lasting period, excessive use amount or uneven application.
Disclosure of Invention
In view of the above, the invention provides a weeding composition containing dithiopyr and halosulfuron-methyl, which has a good control effect on weeds, and has positive effects on the aspects of retarding the resistance of weeds, reducing the dosage of drugs and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
a weeding composition containing dithiopyr and halosulfuron-methyl takes dithiopyr and halosulfuron-methyl as effective components, wherein the mass ratio of the dithiopyr to the halosulfuron-methyl is (1-9) to (1-9).
Further, the usage amount of the dithiopyr and the halosulfuron-methyl is 20-85% of the total mass of the weeding composition.
Further, the usage amount of the dithiopyr and the halosulfuron-methyl is 25-70% of the total mass of the weeding composition.
Further, the dithiopyr, the halosulfuron-methyl and the auxiliary agent are prepared into any formulation allowed in pesticides.
Furthermore, the preparation formulation is wettable powder, missible oil, suspending agent or aqueous emulsion.
The auxiliary agent comprises: water, solvent, filler, various surfactants (emulsifier, dispersant, wetting agent, etc.), adhesive, film forming agent, colorant, antifreezing agent, thickener, suspending agent, disintegrating agent, antifoaming agent, penetrating agent, synergist, stabilizer, wall capsule material, pH regulator, preservative, etc. The adjuvant is selected from ingredients commonly used or allowed to be used in pesticide preparations, and is not particularly limited.
The invention also provides application of the weeding composition in preventing and removing weeds in paddy fields.
Further, the weeds include grasses, broad-leaved weeds and sedge weeds.
Compared with the prior art, the invention has the beneficial effects that:
the weeding composition prepared by compounding the dithiopyr and the halosulfuron-methyl is applied to the paddy field, the weed control effect of the weeding composition is obviously superior to the sum of theoretical effects of single agents, the weeding activity is improved under the condition of reducing the using amount of active ingredients, and the weeding composition has an ultra-additive effect.
The weeding composition prepared by the invention has complementary weeding activity, enlarges the prevention and control spectrum and has long lasting time.
Compared with single-dose herbicides, the herbicidal composition prepared by the invention has the advantages that the use amount of the effective components is reduced, the residual toxicity to peripheral crops or afterculture crops is avoided, and the cost is reduced.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, 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. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" described in the following examples are all "parts by mass".
A weeding composition containing dithiopyr and halosulfuron-methyl takes dithiopyr and halosulfuron-methyl as effective components, wherein the mass ratio of the dithiopyr to the halosulfuron-methyl is (1-9): (1-9).
The usage amount of the dithiopyr and the halosulfuron-methyl is 20-85% of the total mass of the weeding composition.
The dosage of the dithiopyr and the halosulfuron-methyl is 25-70% of the total mass of the weeding composition.
The dithiopyr, the halosulfuron-methyl and the auxiliary agent are prepared into any formulation allowed in pesticides.
The preparation formulation is wettable powder, missible oil, suspending agent or aqueous emulsion.
The auxiliary agent comprises: water, solvent, filler, various surfactants (emulsifier, dispersant, wetting agent, etc.), adhesive, film forming agent, colorant, antifreezing agent, thickener, suspending agent, disintegrating agent, antifoaming agent, penetrating agent, synergist, stabilizer, wall capsule material, pH regulator, preservative, etc. In order to properly improve the tolerance of crops or promote the growth and development of crops, safety technology or agricultural fertilizers can be properly added. The adjuvant is selected from ingredients commonly used or allowed to be used in the pesticide preparation, and is not particularly limited.
For the preparation of wettable powder, emulsifiable concentrate, suspending agent or emulsion in water, etc., the wettable powder, emulsifiable concentrate, suspending agent or emulsion in water can be prepared by using corresponding additives according to the method known by those skilled in the art, and the detailed description is omitted.
The pesticide dosage of the invention meets the national pesticide dosage requirement.
Example 1: 80% wettable powder
Weighing the following raw materials in percentage by mass: 40% of dithiopyr, 40% of halosulfuron-methyl, 82P 6% of sodium lignosulfonate REAX, 8% of light calcium carbonate and the balance of diatomite to 100%.
Example 2: 60% emulsifiable concentrate
Weighing the following raw materials in percentage by mass: 45% of dithiopyr, 15% of halosulfuron-methyl, 4% of sodium dodecyl sulfate, 3% of alkylphenol polyoxyethylene and 100% of solvent oil.
Example 3: 45% suspending agent
Weighing the following raw materials in percentage by mass: 30% of dithiopyr, 15% of halosulfuron-methyl, 4% of polyoxyethylene sorbitan fatty acid ketone, 3% of alkylphenol formaldehyde resin polyoxyethylene ether, 1% of ethylene glycol and the balance of water to 100%.
Example 4: 24% aqueous emulsion
Weighing the following raw materials in percentage by mass: 8% of dithiopyr, 16% of halosulfuron-methyl, 4% of xylene, 3% of calcium dodecyl benzene sulfonate, 4% of dioctyl sodium sulfosuccinate, 2% of glycerol and the balance of water to 100%.
Test example 1
Joint toxicity determination test of different proportions of dithiopyr and halosulfuron-methyl
1. Test conditions
1.1 test target
Barnyard grass, monochoria vaginalis and cyperus rotundus. Collected from paddy fields.
The potting method is adopted. A140-140 mm plastic nutrition pot is placed in a tray, surface soil which is collected from a farmland and is dried and sieved is filled in the nutrition pot, and water is directly added to the top of the nutrition pot, so that the soil humidity is controlled in a saturated state at the initial stage. Selecting full and uniform weed seeds, accelerating germination in an incubator (dark) at 25/30 ℃, uniformly placing the weed seeds just exposed to the white on the surface of soil, covering soil for 0.5cm, keeping the soil fully moist after sowing, and placing the weed seeds in a controllable sunlight greenhouse for culturing.
1.2 culture conditions
The method is carried out in a controllable sunlight greenhouse, the temperature at night is 15-20 ℃, the temperature in the daytime is 25-30 ℃, the natural illumination is carried out, and the relative humidity is 60% -75%. The soil type is loam, the organic matter content is 1.8%, and the pH is 7.1.
1.3 instrumentation
ASS-4 model automatic quantitative spraying system, GA110 model ten thousandth electronic balance;
ZDR2000 intelligent data recorder, MLR-352H plant incubator.
2. Design of experiments
2.1 test Agents
95% of dithiopyr technical and 98% of halosulfuron-methyl technical.
The two original medicine solvents are both acetone, and are diluted by a 0.1% Tween 80 aqueous solution, and the two original medicine solvents are diluted as required.
2.2 test treatment
2.2.1 dose setting
Based on the respective activity and indoor measurement characteristics of the two medicaments, different mixed combinations and single-dose original medicaments are respectively set on the basis of indoor initial measurement. The indoor bioassay was carried out with water containing no drug and the same emulsifier as blank control.
2.2.2 test replicates
Each treatment was repeated 4 times, 3 pots each time, 20 weed seeds were sown per pot, 60 plants each time.
3. Treatment method
3.1 treatment time and number of treatments
The test was performed 1 time in total. And (3) thinning after 1-2 leaf period of barnyard grass, 2-3 leaf period of monochoria vaginalis and 2-3 leaf period of abnormal sedge, keeping 15 weeds in each pot, and reserving 45 weeds for treatment each time.
3.2 Using the device and method of administration
The weeds are uniformly placed on a platform and sprayed by an ASS-4 type automatic quantitative spraying system, a TeeJetXR8002VS fan-shaped spray head, the spraying liquid amount is 450L/ha, and the spraying pressure is 0.275 MPa. And after the liquid medicine is sprayed for 30s, opening a spraying tower door, and taking out the nutrition pot. Then the air valve is opened, 100ml of clean water is sprayed, and the liquid spraying pipe is cleaned.
4. Test method
Refer to 'indoor bioassay test criteria for pesticides' -NY/T1155.9-2008 and NY/T1155.7-2006.
5. Data investigation and statistical analysis
5.1 methods of investigation
Because the concentration gradient is inconsistent in the test, the death of the low-concentration weeds is incomplete, and therefore, the fresh weight of the weeds is investigated by adopting an absolute number survey method. Cutting off the survival weed seedlings along the soil surface by using scissors,
the fresh weight of weeds was weighed with an analytical balance.
5.2 investigation time and number of surveys
The investigation was carried out 15 days after the treatment, and was carried out 1 time in total.
5.3 statistical analysis of data
Carrying out regression analysis on the logarithm value of the dosage of the herbicide and the probability value of the control effect by using DPS statistical software to obtain the dosage (ED) of the herbicide for inhibiting 50 percent of weed growth50). And evaluating the combined action type and the proper proportion after mixing by adopting a co-toxicity coefficient method.
And (3) judging standard: CTC (virulence factor) < 80 is antagonistic, between 80-120 is additive, CTC > 120 is synergistic.
Fresh weight control (%) - (control fresh grass weight-treatment zone fresh grass weight)/control fresh grass weight × 100. And the optimal proportion is determined according to factors such as actual control effect, characteristics of the herbicide, balance of the formula and the like. The statistical results are shown in Table 1.
TABLE 1 virulence determination of pyributicarb in combination with dithiopyr-sulfuron
As can be seen from Table 1, the mass ratio of dithiopyr to halosulfuron-methyl (1:1) - (1:5) and (3:1) - (9:1) have a synergistic effect on weeds, but when the dose of dithiopyr is too large, the toxicity coefficient is rather reduced, which indicates that the use of the dose of the dithiopyr is rather unfavorable for the herbicidal composition. When the mass ratio of the dithiopyr to the halosulfuron-methyl is 3:1, the toxicity coefficient is the largest and can reach 185.06, the obvious synergistic effect is achieved, and the effect that 1+1 is larger than 2 is achieved.
TABLE 2 toxicity assay of dithiopyr and halosulfuron-methyl on monochoria vaginalis
As can be seen from Table 2, the weeding effect of the mixture of the dithiopyr and the halosulfuron-methyl on the monochoria vaginalis is obviously improved, which shows that the combination of the dithiopyr and the halosulfuron-methyl has obvious synergistic effect on the prevention and the removal of the monochoria vaginalis. Particularly, the ratio of the dithiopyr to the halosulfuron-methyl is 3:1, and the cotoxicity coefficient of the mixed two effective substances is optimal, which shows that the invention has obvious synergistic effect.
TABLE 3 toxicity determination of the combination of dithiopyr and halosulfuron-methyl for heterotypic cyperus
As can be seen from Table 3, the weeding effect of the dithiopyr and halosulfuron-methyl hybrid special-shaped sedge is remarkably improved, which shows that the combination of the dithiopyr and halosulfuron-methyl has remarkable synergistic effect on preventing and killing off the special-shaped sedge. Particularly, the ratio of the dithiopyr to the halosulfuron-methyl is 3:1, and the cotoxicity coefficient of the mixed two effective substances is optimal, which shows that the invention has obvious synergistic effect.
Test example 2
Test of field pesticide effect of herbicide composition in preventing and killing annual weeds in paddy field
Test agents: 80% wettable powder, 60% emulsifiable solution, 45% suspending agent, 24% aqueous emulsion, 32% dithiopyr emulsifiable solution as a control agent, 75% halosulfuron-methyl water dispersible granules and a blank control group, which are prepared in examples 1 to 4.
The test crop is rice, and the control target is annual gramineous weed, broadleaf weed and cyperaceae weed in rice field, specifically barnyard grass, semen Euphorbiae Lathyridis, herba Amaranthi Tricoloris, herba Monochoriae, and abnormal Cyperus rotundus.
The test method comprises the following steps: the pesticide is applied once in the 2-3 leaf stage of rice seedling and the 2-3 leaf stage of weed. The test field has flat topography, moderate soil fertility and a pH value of 7.1. 20m per cell per 4 replicates per treatment2The total number of the cells is 32, and the cells are arranged in random groups. The conventional spraying method is adopted.
The control effect of each treated weed strain is investigated 15d after the application. The investigation method is that 4 points are investigated for each cell, eachPoint 0.25m2. The drug effect calculation formula is as follows:
in the formula: CK is the number of weed plants in the control area, and PT is the number of residual weed plants in the application area.
TABLE 4 control of paddy field weeds field efficacy test plants (15 days)
As can be seen from Table 4, the herbicidal composition compounded by the dithiopyr and the halosulfuron-methyl has better control effects on gramineous weeds, broadleaf weeds and sedge weeds, and compared with the control effects of the single-component dithiopyr and halosulfuron-methyl on weeds, the dithiopyr and halosulfuron-methyl have super-additive effects, and compared with the dosage of the active ingredients in each medicament, the example 2 (60% emulsifiable concentrate) has the best control effect on gramineous weeds, which indicates that the active content in the medicament is the best content.
Safety investigation: the safety of each treatment on rice seedlings was visually observed at 7d and 15d after application. The observation result shows that all tested agents are safe to the growth of rice and do not have phytotoxicity phenomena such as chlorosis, dwarfing and the like.
The above description is intended to be illustrative of the present invention and should not be taken as limiting the invention, as the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. A weeding composition containing dithiopyr and halosulfuron-methyl is characterized in that the weeding composition takes dithiopyr and halosulfuron-methyl as effective components, wherein the mass ratio of the dithiopyr to the halosulfuron-methyl is (1-9) to (1-9).
2. A herbicidal composition according to claim 1, wherein the dithiopyr and halosulfuron-methyl are used in an amount of 20 to 85% by mass based on the total mass of the herbicidal composition.
3. A herbicidal composition according to claim 1, wherein the dithiopyr and halosulfuron-methyl are used in an amount of 25 to 70% by mass based on the total mass of the herbicidal composition.
4. A herbicidal composition according to claim 1, wherein the dithiopyr, halosulfuron-methyl and adjuvant are formulated in any formulation which is agriculturally acceptable.
5. A herbicidal composition according to claim 4, characterized in that the formulation is a wettable powder, an emulsifiable concentrate, a suspension, or an aqueous emulsion.
6. Use of the herbicidal composition as claimed in any one of claims 1 to 5 for controlling weeds in paddy fields.
7. Use according to claim 6, wherein the weeds comprise grasses, broadleaf weeds and sedge weeds.
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