CN118252151A - Weeding composition and application thereof - Google Patents
Weeding composition and application thereof Download PDFInfo
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- CN118252151A CN118252151A CN202410365381.7A CN202410365381A CN118252151A CN 118252151 A CN118252151 A CN 118252151A CN 202410365381 A CN202410365381 A CN 202410365381A CN 118252151 A CN118252151 A CN 118252151A
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- oxadiargyl
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Abstract
The invention relates to a weeding composition and application thereof, and relates to the field of pesticides, wherein the active ingredients comprise flufenacet and oxadiargyl, and the weight ratio of the flufenacet to the oxadiargyl is (0.13-12): 1. the combination of the oxadiargyl and the flufenacet not only can improve the control effect on resistant weeds and enlarge the weed control spectrum, but also can reduce the dosage of the oxadiargyl and improve the safety, and can also solve the problem of poor drug effect of the oxadiargyl at low temperature and prolong the duration of effect. In addition, the mixed use of two herbicides with different action mechanisms can delay the development of the resistance level of weeds. The composition has the advantages of high weeding efficiency, good safety, strong adaptability and environmental friendliness.
Description
Technical Field
The invention relates to the field of pesticides, in particular to a weeding composition and application thereof.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Pesticides play an important role in agricultural production, and as the development difficulty of new pesticides is increased, the time and financial resources consumed are increased, and the reasonable mixing of existing pesticide products to ensure the effect is a current alternative. The reasonable mixing is one of the important means for playing the economic benefits of pesticides and ensuring the harvest of agriculture, and the pesticide mixture plays an important role in pesticide processing and application. People pay more attention to reasonable mixing of pesticides and development of mixed agents.
Herbicide application accounts for the maximum proportion of pesticides in developed countries, and with the development of agricultural modernization, large-scale and extensive cultivation and cultivation management, the application area of the herbicide is continuously enlarged, and the application technology and requirements are increasingly improved. The single herbicide has the advantages that the damage of mixed weeds is difficult to solve, the mixed use of the herbicide is more and more extensive, the mixed use can make up for the shortages, reduce the dosage, enlarge the weed killing spectrum, improve the pesticide effect, reduce the residues in crops and soil, enhance the adaptability to cultivation and climate conditions, improve the safety of crops and play an important role in the mixed use of resistant weed management.
Fluofenacet, international common name Flufenacet, CAS accession number: 142459-58-3, chemical name 4' -fluoro-N-isopropyl-2- (5-trifluoromethyl-1, 3, 4-thiadiazol-2-yloxy) acetanilide, which is an oxyacetamide herbicide developed by Bayer company, has the action mechanism of cell division and growth inhibitor, can be absorbed by plant root systems and newly born aerial parts, is conducted on plant stems and leaves through xylem, and can prevent annual gramineous weeds and certain broadleaf weeds by inhibiting cell division.
Oxadiargyl, international common name oxadiargyl, CAS accession number: 39807-15-3, chemical name: 5-tert-butyl-3- (2, 4-dichloro-5- (prop-2-ynyloxy) phenyl) -1,3, 4-oxadiazol-2 (3H) -one; is a novel oxadiazolone herbicide developed by the company of French Rona-Planck. The action mechanism is protoporphyrinogen oxidase inhibitor and selective pre-emergence soil treatment herbicide. After application, the effective components can form a medicinal film on the surface layer of soil, so that target weeds are eliminated in a sprouting state, and weeds such as barnyard grass, moleplant seed, spirogyra, small-leaf algae, special-shaped nutgrass, garrulous nutgrass, cow felt, glossoside, festival vegetables, stranger vegetables and the like in a rice field can be prevented and treated.
In addition, oxadiargyl belongs to a protoporphyrinogen oxidase inhibitor, and when the amount of oxadiargyl is large, the risk of phytotoxicity to crops is generated.
In view of this, the present invention has been made.
Disclosure of Invention
Object of the Invention
The invention aims to provide a weeding composition and application thereof, and the combination of oxadiargyl and flufenacet can improve the control effect on resistant weeds, expand the weeding spectrum, reduce the dosage of the oxadiargyl, improve the safety, solve the problem of poor drug effect of the oxadiargyl at low temperature and prolong the duration of action. In addition, the mixed use of two herbicides with different action mechanisms can delay the development of the resistance level of weeds. The composition has the advantages of high weeding efficiency, good safety, strong adaptability and environmental friendliness. The combination of oxadiargyl and flufenacet is mainly applied to non-transgenic conventional crops, and the applied crops are plants with completely different genetic backgrounds. The composition can not only improve the control effect on resistant weeds and expand the weed control spectrum, but also greatly reduce the dosage of oxadiargyl in crops, improve the safety, solve the problem of poor drug effect of oxadiargyl at low temperature and prolong the duration of effect. In addition, the mixed use of two herbicides with different action mechanisms can delay the development of the resistance level of weeds.
Solution scheme
In order to achieve the aim of the invention, the embodiment of the invention provides a weeding composition, which comprises the active ingredients of flufenacet and oxadiargyl, wherein the weight ratio of the flufenacet to the oxadiargyl is (0.13-12): 1, optionally (0.25-12): 1, optionally (0.13-6.0): 1, optionally (0.25 to 6): 1, optionally (0.25 to 4): 1, optionally (0.25 to 3): 1, optionally (0.25-2): 1, optionally (0.5 to 4): 1, optionally (1-4): 1, optionally (1-2): 1, alternatively 0.25: 1. 0.5: 1. 1: 1. 2: 1. 3: 1. 4: 1. 6:1.
Further, the effective component accounts for 3% -80% of the total weight of the weeding composition, and is optionally 15% -50%.
Further, the dosage form of the herbicide composition is any one of an aqueous suspension agent, an oil suspension agent, wettable powder or water dispersible granule and a suspending emulsion.
Further, the herbicide composition also comprises an auxiliary material acceptable in pesticide; optionally, the pesticide acceptable auxiliary materials comprise one or more of dispersing agents, wetting agents, thickening agents, antifreezing agents, antifoaming agents, preservatives and solvents;
optionally, the dispersing agent is selected from one or more of alkyl naphthalene sulfonate, methacrylate copolymer, lignin sulfonate and polycarboxylate;
Optionally, the wetting agent is selected from one or more of sodium alkyl sulfate, calcium alkyl benzene sulfonate, sodium alkyl benzene sulfonate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, polyoxyethylene ether phosphate and salts thereof;
optionally, the antifreezing agent is selected from one or more of ethylene glycol, propylene glycol, glycerol and urea;
optionally, the thickener is selected from one or more of white carbon black, magnesium aluminum silicate, sodium carboxymethylcellulose, xanthan gum, gelatin and acacia;
optionally, the defoamer is selected from one or more of silicones, polyethers and fatty alcohols;
Optionally, the preservative is selected from isothiazolin-3-one preservatives, optionally one or more selected from 1, 2-phenylpropanoid isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one;
Optionally, the solvent is selected from any one or more of water, aromatic hydrocarbons, alcohols, ketones, amides and esters, and optionally water.
Further, the material comprises the following raw materials in parts by weight: 1 to 20 percent of flufenacet, 1 to 20 percent of oxadiargyl, 3 to 10 percent of wetting agent or dispersing agent, 1 to 10 percent of thickening agent, 1 to 10 percent of antifreezing agent, 0 to 5 percent of preservative, 0 to 10 percent of defoaming agent and 40 to 70 percent of water;
optionally, the material comprises the following raw materials in parts by weight: 5 to 10 percent of flufenacet, 5 to 10 percent of oxadiargyl, 5 to 10 percent of wetting agent or dispersing agent, 1 to 10 percent of thickening agent, 1 to 10 percent of antifreezing agent, 0 to 5 percent of preservative, 0 to 10 percent of defoaming agent and 40 to 70 percent of water.
Optionally, the material comprises the following raw materials in parts by weight: 10% of flufenacet, 5% to 10% of oxadiargyl, 5% to 10% of wetting agent or dispersing agent, 1% to 10% of thickening agent, 1% to 10% of antifreezing agent, 0% to 5% of preservative, 0% to 10% of defoaming agent and 40% to 70% of water.
Further, the composition is used for controlling weeds in cultivated, uncultivated and/or orchards; optionally, the weeds comprise one or more of barnyard grass, semen Euphorbiae, green bristlegrass, herba Acalyphae, amaranthus retroflexus, amaranthus auriculatus, and herba Polygoni Caryophylli.
In a second aspect, there is provided the use of a herbicidal composition according to the first aspect for controlling weeds in cultivated, uncultivated and/or orchards. Alternatively, the herbicidal composition is applied to paddy fields, which are transplanted rice paddy fields, peanut fields, soybean fields or cotton fields.
Further, the weeds comprise one or more of barnyard grass, semen euphorbiae, green bristlegrass, acalypha australis, amaranthus retroflexus, amaranthus auriculatus and polygonum caryophyllum.
Alternatively, the herbicidal composition is suitable for use in non-transgenic crops or crops that are not resistant to protoporphyrinogen oxidase inhibitors.
In a third aspect, the present invention provides a method of applying the above herbicide composition or the above herbicide composition formulation, comprising spraying, bottle throwing, granule broadcasting or toxic soil method; preferably, the toxic soil method comprises soil mixing or fertilizer mixing.
Further, the application amount of the active ingredient of the herbicide composition is 75-375 g a.i./ha, wherein the application dosage of the flufenacet in the herbicide composition is 30-150 g a.i./ha, preferably 50-100 g a.i./ha, and the application dosage of the oxadiargyl is 20-150 g a.i./ha, preferably 50-100 g a.i./ha.
The equipment of the processing technology of the preparation of the invention is publicly known.
Advantageous effects
The oxadiargyl and flufenacet weeding product provided by the invention has the greatest advantage of good safety to rice, peanut, soybean and cotton. The composition has high control efficiency on the difficult-to-control and resistant grassy weeds such as barnyard grass, semen euphorbiae, broadleaf weeds such as amaranth and polygonum lilac, has long lasting period, has remarkable synergy and can expand the weed killing spectrum; has high control effect on barnyard grass, green bristlegrass, amaranthus retroflexus and acalypha australis in dry fields. The weeding product can be sprayed, mixed with soil or mixed with fertilizer for broadcasting, or can be applied by an airplane or sprayed mechanically; when the herbicide product is used, not only the effective components can be directly used, but also the effective components can be prepared for use; other herbicides and fertilizers can also be added for mixing. When in application, the medicine can be applied simultaneously or sequentially, and is flexible and convenient to use.
The combination of oxadiargyl and flufenacet is mainly applied to non-transgenic conventional crops, and the applied crops are plants with completely different genetic backgrounds. The composition can not only improve the control effect on resistant weeds and expand the weed control spectrum, but also greatly reduce the dosage of oxadiargyl in crops, improve the safety, solve the problem of poor drug effect of oxadiargyl at low temperature and prolong the duration of effect. In addition, the mixed use of two herbicides with different action mechanisms can delay the development of the resistance level of weeds.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some embodiments, materials, elements, methods, means, etc. well known to those skilled in the art are not described in detail in order to highlight the gist of the present invention. The percentages in all the formulas of the invention are weight ratios.
The invention provides a herbicide composition, which comprises the active ingredients of flufenacet and oxadiargyl, wherein the weight ratio of the flufenacet to the oxadiargyl is (0.13-12): 1, optionally (0.25-12): 1, optionally (0.25 to 6): 1, optionally (0.25 to 4): 1, optionally (0.25 to 3): 1, optionally (0.25-2): 1, optionally (0.5 to 4): 1, optionally (1-4): 1, optionally (1-2): 1, alternatively 0.25: 1. 0.5: 1. 1: 1. 2: 1. 3: 1. 4: 1. 6:1.
The weeding composition disclosed by the invention is applied to transplanted rice fields, has a synergistic effect on barnyard grass which is a malignant weed, is wide in weeding spectrum, has high control efficiency on barnyard grass which is a grass family difficult to control in rice fields, and stephania japonica, broadleaf weeds such as cotton, glossoside, festival vegetables, amaranthus auriculatus, polygonum caryophyllum and the like, has a long lasting period, and is good in rice safety.
The application technology of the weeding product in transplanting rice comprises the following steps: before or after the rice is transplanted, the rice is applied to a transplanting field by a spraying method, a bottle throwing method, a granule broadcasting method and a toxic soil method (soil mixing or fertilizer mixing). The herbicide product comprises the active ingredients of flufenacet and oxadiargyl, and a solvent and/or a solid carrier. When the herbicide is used, the active ingredient can be directly used, or the active ingredient can be prepared or mixed with other herbicides, fertilizers and the like for application. When in application, the two components can be applied simultaneously or sequentially.
Evaluation of the Combined action of Fluothiazate and oxadiargyl
1. Bioassay test method:
Reference to section 4 of herbicides from agricultural rural area, guidelines for bioassay tests in pesticide indoor, NY/T1155.3-2006: activity measurement test, soil spraying method.
The flufenacet and oxadiargyl according to the invention can be obtained in a commercially available manner. For example, 98% of the fomesalamine crude drug is purchased from luzhou eastern agrochemicals limited; the 96% oxadiargyl technical is purchased from the company of Hefebrile chemical Co., ltd; 5% oxadiargyl +30% butachlor EC was purchased from Anhui blue field agricultural development Co.
Preparing a liquid medicine:
The raw materials are as follows: accurately weighing a certain mass of herbicide raw material, dissolving with DMF (dimethylformamide), adding clear water containing 0.1% Tween 80 emulsifier, and stirring uniformly to prepare a solution with a certain concentration for standby.
Preparation: the preparation is directly weighed and is diluted with water for post treatment.
2. Evaluation criterion of herbicidal Activity by visual inspection
Visual inspection of the herbicidal activity of the agents was visually examined in terms of the degree of plant damage symptoms (inhibition, deformity, yellowing, albino), 0 means no herbicidal effect, 100% means complete killing of weeds, and the visual inspection evaluation criteria are shown in table 1-1.
TABLE 1-1 visual evaluation criteria for herbicidal Activity
The fresh weight or plant number inhibition rate is calculated as follows:
3. crop safety evaluation criterion
Herbicide part 8 according to agricultural rural sector industry Standard NY/T1155.8-2007 pesticide indoor biological assay test guidelines: crop safety test stem and leaf spray method, crop safety evaluation criteria are shown in the following table.
TABLE 1-2 crop phytotoxicity evaluation criteria
| Degree of phytotoxicity (%) | Description of results |
| 0 | Safety, no phytotoxicity |
| 1～10 | Has no obvious phytotoxicity |
| 11～30 | Slight injury due to drug |
| 31～50 | Moderate phytotoxicity |
| 51～100 | Serious phytotoxicity |
The field test data were subjected to analysis of variance using the Duncan's new complex polar difference method, a statistical analysis software of DPS 7.05, to determine the significance of the differences in effect between the different treatments (α=0.05).
3. Combined action evaluation test
Indoor tests were performed on the compositions provided by the invention to demonstrate the type of combined action of flufenacet and oxadiargyl. And comparing the weeding activities of the flufenacet and oxadiargyl composition with a single dose according to different proportions by a greenhouse potting activity measurement test.
Test target: barnyard grass (Echinochloa crus-galli, grassy weeds) and ear She Shuixian (AMMANNIA ARENARIA, broadleaf weeds), the weed seeds are collected from the paddy field and stored in a seed warehouse.
The greenhouse potting treatment method is adopted, quantitative soil is filled in a plastic pot, about 10 weed seeds to be tested are sown on the soil surface, fine soil is covered by 0.5-1 cm, the soil is cultivated in the greenhouse, and soil before seedling spraying treatment is carried out after sowing. Each treatment was repeated 4 times with no drug treatment as a control. Culturing in a greenhouse after treatment, periodically observing the growth condition of target weeds, and visually observing the comprehensive herbicidal activity 30 days after treatment, wherein the control effects of barnyard grass and amaranthus auriculatus are shown in tables 2 and 3 respectively.
The type of combined action of flufenacet and oxadiargyl compositions was evaluated by the Gowing method. The specific steps are that firstly, the prevention effect of a single agent and a mixed agent on target weeds is measured, the theoretical prevention effect of the mixed agent is calculated through the actual measurement prevention effect of the single agent, and then the combined action type is evaluated by comparing the theoretical prevention effect with the actual measurement prevention effect of the mixed agent.
The calculation formula of the Gowing method mixing effect is as follows: e 0 = x+y-XY/100;
Wherein X represents the weed control effect of herbicide A when the dosage is P; y represents the weed control effect of herbicide B when the dosage is Q; e 0 represents the theoretical control effect of herbicide (A+B) when the herbicide is used in an amount of (P+Q). A is flufenacet and B is oxadiargyl.
TABLE 2 evaluation results of the Combined action of Fluothiazate+oxadiargyl in different proportions on barnyard grass
TABLE 3 evaluation results of the Co-action of Fluothiazate and oxadiargyl in different proportions on Amaranthus auriculatus
The results in Table 2 and Table 3 show that the weed control effect after the two agents are mixed is higher than that of two single agents, and the weeding activity is improved. The evaluation result of the combined action of the composition shows that the actual control effect E of most of the mixture ratios after the flufenacet and the oxadiargyl are mixed is larger than the theoretical control effect E 0, wherein the ratio is (0.13-6.0): 1, the flufenacet and the oxadiargyl have a synergistic effect on barnyard grass in the proportion range, and the composition is prepared from the following components (0.25-12): 1, the flufenacet and the oxadiargyl have a synergistic effect on the lug She Shuixian in the proportion range, and the proportion range is (0.25-6.0): in the range of the proportion of 1, the E-E 0 values of the two weeds are more than 10%, the combined action type of the mixed ingredients is synergistic action, and the rest proportions are synergistic action or additive action, so that antagonism does not occur.
The invention also carries out preparation of preparation examples:
example 1 Fluothiazate/oxadiargyl mass ratio of 1:1
TABLE 4 composition of the components of example 1
Example 2 Fluothiazate/oxadiargyl mass ratio of 2:1
TABLE 5 composition of the components of example 2
| Component (A) | Weight ratio (%) | Remarks |
| Fluothiazate | 10 | Active ingredient |
| Oxadiargyl and process for preparing same | 5 | Active ingredient |
| SOPROPHOR 3D33 polyoxyethylene ether phosphate | 5 | Wetting agents, available from solvay |
| GEROPON T-36 polycarboxylates | 3 | Dispersants from solvay |
| Ethylene glycol | 5 | Antifreezing agent |
| Magnesium aluminum silicate | 1 | Thickening agent |
| Xanthan gum | 0.2 | Thickening agent |
| BIT (1, 2-Benzisothiazolin-3-one) | 0.1 | Preservative agent |
| Sag 630 organosilicon | 0.3 | Defoamer, purchased from mai |
| Water and its preparation method | 70.4 | Solvent(s) |
Example 3 Fluothiazate/oxadiargyl mass ratio of 4:1
TABLE 6 composition of the components of example 3
Comparative example 1
The difference from example 1 is that the oxadiargyl is replaced with an equal amount of water to prepare a single flufenacet dose.
Comparative example 2
The difference from example 1 is that the oxadiargyl single dose is prepared by replacing the flufenacet with an equal amount of water.
The compositions of examples 1 to 3 and comparative examples 1 to 2 were prepared as aqueous suspensions according to the conventional methods for aqueous suspensions.
Test example 1 greenhouse herbicidal Activity and safety comparative test
The indoor activity measurement test is carried out on the herbicide composition to understand the control effect of the composition on weeds and the advantages of crop safety. Test target: barnyard grass (Echinochloa crus-galli), polygonum caryophyllum (Ludwigia prostrata) and rice (Oryza sativa l.). Weed seeds are collected in the paddy field, the rice seeds are commercial seeds, and the commercial seeds are stored in a seed warehouse room.
The test method comprises the following steps: the greenhouse potting treatment method is adopted, quantitative soil is filled in a plastic pot, about 10 weed seeds to be tested are sown on the soil surface, fine soil is covered by 0.5-1 cm, the soil is cultivated in the greenhouse, and soil before seedling spraying treatment is carried out after sowing. Each treatment was repeated 4 times. Culturing in a greenhouse after treatment, periodically observing the growth condition of target weeds, and periodically and visually observing the comprehensive herbicidal activity after treatment.
Rice safety test: transplanting rice (Kunyou 822) in 2 leaves and 1 heart stage, and spraying the stems and leaves after 24 hours. Culturing in a greenhouse after treatment, simulating the water-retaining culture among transplanted paddy fields, periodically observing the growth condition of the paddy rice, and visually observing the comprehensive growth inhibition condition about 30 days after the treatment.
The herbicide composition formulations provided in examples 1 to 2 and comparative examples 1 to 4 were selected for the test, and the test results of the measurement at 30 days after the administration are shown in Table 7. The results show that the herbicide composition preparation provided in the examples 1-2 has 93.6% -97.2% of activity on barnyard grass and gramineous grass and polygonum latifolia, and has 0.7% and 5.3% of safety effect on rice, and the weed control effect and safety are superior to those of each comparative example. The herbicide composition improves the safety of rice while reducing the dosage of active ingredients, and maintains good herbicidal activity for grassy weeds and broadleaf weeds.
Table 7 results of comparative tests of herbicidal Activity and Rice safety of different compositions 30 days after administration
Note that: different letters from the same column indicate significant differences (P < 0.05).
Test example 2 comparative test at different temperatures
Test method reference is made to test example 1. Comparative experiments were carried out by selecting example 1 and comparative examples 3 to 4, and the treated medicines were placed in plant growth illumination incubators at different temperatures for cultivation and growth, respectively. Incubator temperature conditions were 15℃and 30℃respectively. The specific results are shown in Table 8. The result 30 days after the application shows that the herbicide composition preparation provided in the example 1 maintains higher herbicidal activity under different temperature conditions of 15 ℃ and 30 ℃ and has better safety to rice, and the application effect is obviously better than that of two comparative examples.
TABLE 8 comparative test results of the herbicidal Activity and safety Effect of different temperatures on compositions
Note that: different letters from the same column indicate significant differences (P < 0.05).
Test example 3 duration of validity comparative test
Test method reference is made to test example 1. Comparative tests were carried out by selecting example 1 and comparative examples 3 to 4, and herbicidal activities against barnyard grass were examined at different times after the treatment with the agents, and the specific results are shown in table 9. The results show that the herbicide composition preparation treatment provided in example 1 maintains higher herbicidal activity at both 20 days post-drug and 40 days post-drug, while the two comparative examples are higher in activity at 20 days post-drug and significantly lower in activity at 40 days post-drug.
Table 9 results of duration of efficacy comparison test of compositions against barnyard grass control
Note that: different letters from the same column indicate significant differences (P < 0.05).
Test example 4 field test
1. Paddy field
According to national standard GB/T17980.40-2000 pesticide field efficacy test criterion (I) herbicide for controlling paddy field weeds, a field plot test method is adopted for test. The test is arranged at the mouth town of lotus in Jiadas, heilongjiang province, the test Tian Deshi is flat, irrigation and drainage facilities are complete, field management levels are consistent, fertility is uniform and medium, soil is loam, and pH is neutral. The soil preparation time is 5 months and 1 day, the rice is transplanted 5 months and 10 days, the soil is prepared by adopting a harrowing and soil rotating integrated machine, the previous crop in the test field is rice, and the rice variety is Longjing rice 31. The main weeds in the test fields are barnyard grass, alisma orientale and the like, and the weeds uniformly occur.
The test cells are arranged in random groups, each cell is separated by a black plastic baffle, and an independent water inlet and an independent water outlet are arranged to prevent water pollution between different treatments, each cell can be filled with water before the use of the medicine, a water layer of 5-10cm is kept, the cell area is 25.5m 2, the cell shape is rectangular, and each treatment is repeated for 3 times. The chemical treatment is carried out before rice transplanting, the application method is a spraying method, an electric sprayer is adopted for uniform spraying treatment, and the water adding amount is 30L/mu.
The results of the visual investigation of weed control and rice growth effects were carried out at different times after the treatment with the agents and are shown in tables 10 and 11. And in the harvesting period of the rice, carrying out actual harvest and yield measurement on each district. The test result shows that the combination of flufenacet and oxadiargyl 75+75gai/ha has good safety for transplanting rice and obvious yield increasing effect; the herbicide composition has high control effect on barnyard grass and alisma weeds, and the control effect is superior to that of a conventional herbicide composition of oxadiargyl and butachlor.
Table 10 example composition of transplanted paddy field test results of weed control field plot safety
Note that: different letters from the same column indicate significant differences (P < 0.05).
Table 11 composition example transplanted Rice field weed control field plot test results-weed control
Note that: different letters from the same column indicate significant differences (P < 0.05).
2. Peanut field
According to the 126 th part of the national standard GB/T17980.126-2004 pesticide field efficacy test criterion (II), the herbicide is used for controlling peanut field weeds, and a field plot test method is adopted for the test. The test is arranged in Fen Chen Zhenfeng Zhuang Cun county Xu Changshi Xiangcheng in Henan province, the test Tian Deshi is flat, the field management level is consistent, the fertility is uniform and medium, the soil is sandy loam, and the PH is neutral. Sowing for 5 months and 10 days, wherein the sowing amount is 30 jin/mu, and the peanut variety is 25 flowers and seedlings. The previous crop is peanut. The main weeds in the test fields are barnyard grass, amaranthus retroflexus, acalypha australis and the like, and the weeds uniformly occur.
The test cells are arranged in random groups, the cell area is 25m 2, the cell shape is rectangular, and each treatment is repeated for 3 times. And (3) carrying out soil spray treatment before seedling after peanut sowing, adopting an electric sprayer to uniformly spray treatment, and adding 50L/mu of water. Visual inspection was performed 25 days after the treatment with the agents for weed control and crop safety results, as shown in table 12. The test result shows that the flufenacet and oxadiargyl combination is applied to peanut fields, has high control effect on weeds, and has visual control effect on barnyard grass, amaranthus retroflexus and acalypha australis of more than 90% after 25 days after the application. Example 3 the agent exhibited safety to peanuts.
Table 12 composition example peanut field test results for weed control field plots
Note that: the letter identical represents no significant difference.
3. Soybean field
According to the 125 th part of the national standard GB/T17980.125-2004 pesticide field efficacy test criterion (II), the herbicide is used for controlling the weeds in the soybean fields, and a field plot test method is adopted for the test. The test is arranged in Fen Chen Zhenfeng Zhuang Cun county Xu Changshi Xiangcheng in Henan province, the test Tian Deshi is flat, the field management level is consistent, the fertility is uniform and medium, the soil is sandy loam, and the PH is neutral. Sowing for 12 days in 6 months, wherein the soybean is 16. The previous crop is wheat. The main weeds in the test fields are barnyard grass, green bristlegrass, amaranth, acalypha australis and the like, and the weeds uniformly occur.
The test cells are arranged in random groups, the cell area is 25m 2, the cell shape is rectangular, and each treatment is repeated for 3 times. And (3) carrying out soil spray treatment before seedling after soybean sowing, adopting an electric sprayer to uniformly spray treatment, and adding 50L/mu of water. The results of the investigation of weed control and crop safety by visual inspection 25 days after the treatment with the agents are shown in Table 13. The test result shows that the flufenacet and oxadiargyl combination is applied to soybean fields, has high weed control effect, and has visual control effect on barnyard grass, green bristlegrass, amaranth, and acalypha australis of more than 90% after 25 days after the preparation, and the preparation in the embodiment 3 is safe for soybeans.
Table 13 results of the field plot test for controlling weeds in soybean fields of composition example
4. Cotton field
According to the national standard GB/T17980.128-2004 pesticide field efficacy test criterion (II) part 128: the herbicide is used for preventing and controlling weeds in cotton fields, and the field plot test method is adopted for the test. The test is arranged in the village of the Jiujia building Su Shi in the Tachen area of Xinjiang, a film-covered drip irrigation cultivation mode is adopted, the test Tian Deshi is flat, the field management level is consistent, the fertility is uniform and medium, the soil is sandy loam, and the pH value is 9.27. Sowing in 15 days of 4 months, and the cotton variety is Xinlunzao 72. The main weeds in the test fields are barnyard grass, green bristlegrass, amaranth and the like, and the weeds uniformly occur.
The test cells are arranged in random groups, the cell area is 30m 2, the cell shape is rectangular, and each treatment is repeated for 3 times. Soil spraying treatment is carried out before cotton sowing, and an electric sprayer is adopted for uniform spraying treatment, and the water adding amount is 80L/mu. The results of the investigation of weed control and crop safety results were visually examined 25 days after the treatment with the agent and are shown in Table 14. The test result shows that the flufenacet and oxadiargyl combination is applied to cotton fields, has high control effect on weeds, has visual control effect on barnyard grass, green bristlegrass and amaranth of greater than 90% after the application of the composition for 25 days, and the preparation in the embodiment 2 is safe for cotton.
Table 14 composition example cotton field plot test results for weed control
The weeding product provided by the invention has the greatest advantage of good safety to conventional crops (rice, peanut, soybean and cotton). The composition has high control efficiency on the grass of grass weeds which are difficult to control and resistant in paddy fields, has long lasting period, has obvious synergy and can enlarge the weed killing spectrum; has high control effect on barnyard grass, green bristlegrass, amaranthus retroflexus and acalypha australis in dry fields. The weeding product can be sprayed, mixed with soil or mixed with fertilizer for broadcasting, or can be applied by an airplane or sprayed mechanically; when the herbicide product is used, not only the effective components can be directly used, but also the effective components can be prepared for use; other herbicides and fertilizers can also be added for mixing. When in application, the medicine can be applied simultaneously or sequentially, and is flexible and convenient to use.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The weeding composition is characterized in that the effective components comprise flufenacet and oxadiargyl, and the weight ratio of the flufenacet to the oxadiargyl is (0.13-12): 1.
2. The herbicidal composition of claim 1 wherein the weight ratio of flufenacet to oxadiargyl is (0.25 to 12): 1, optionally (0.13-6.0): 1, optionally (0.25 to 6): 1, optionally (0.25 to 4): 1, optionally (0.25 to 3): 1, optionally (0.25-2): 1, optionally (0.5 to 4): 1, optionally (1-4): 1, optionally (1-2): 1, alternatively 0.25: 1. 0.5: 1. 1: 1. 2: 1. 3: 1. 4: 1. 6:1.
3. A herbicidal composition according to claim 1 or 2, wherein the active ingredient comprises 3% to 80%, optionally 15 to 50% of the total weight of the herbicidal composition.
4. A herbicidal composition according to any one of claims 1 to 3, wherein the formulation of the herbicidal composition is any one of an aqueous suspension, an oil suspension, a wettable powder or a water dispersible granule, a suspoemulsion.
5. The herbicidal composition of claim 4 wherein the herbicidal composition further comprises a pesticidally acceptable adjuvant; optionally, the pesticide acceptable auxiliary materials comprise one or more of dispersing agents, wetting agents, thickening agents, antifreezing agents, antifoaming agents, preservatives and solvents;
optionally, the dispersing agent is selected from one or more of alkyl naphthalene sulfonate, methacrylate copolymer, lignin sulfonate and polycarboxylate;
Optionally, the wetting agent is selected from one or more of sodium alkyl sulfate, calcium alkyl benzene sulfonate, sodium alkyl benzene sulfonate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, polyoxyethylene ether phosphate and salts thereof;
optionally, the antifreezing agent is selected from one or more of ethylene glycol, propylene glycol, glycerol and urea;
optionally, the thickener is selected from one or more of white carbon black, magnesium aluminum silicate, sodium carboxymethylcellulose, xanthan gum, gelatin and acacia;
optionally, the defoamer is selected from one or more of silicones, polyethers and fatty alcohols;
Optionally, the preservative is selected from isothiazolin-3-one preservatives, optionally one or more selected from 1, 2-phenylpropanoid isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one;
Optionally, the solvent is selected from any one or more of water, aromatic hydrocarbons, alcohols, ketones, amides and esters, and optionally water.
6. The herbicidal composition according to any of claims 1 to 5, characterized by comprising the following raw materials in weight fraction: 1 to 20 percent of flufenacet, 1 to 20 percent of oxadiargyl, 3 to 10 percent of wetting agent or dispersing agent, 1 to 10 percent of thickening agent, 1 to 10 percent of antifreezing agent, 0 to 5 percent of preservative, 0 to 10 percent of defoaming agent and 40 to 70 percent of water;
Optionally, the material comprises the following raw materials in parts by weight: 10 to 20 percent of flufenacet, 5 to 10 percent of oxadiargyl, 5 to 10 percent of wetting agent or dispersing agent, 1 to 10 percent of thickening agent, 1 to 10 percent of antifreezing agent, 0 to 5 percent of preservative, 0 to 10 percent of defoaming agent and 40 to 70 percent of water;
Optionally, the material comprises the following raw materials in parts by weight: 10% of flufenacet, 5% to 10% of oxadiargyl, 5% to 10% of wetting agent or dispersing agent, 1% to 10% of thickening agent, 1% to 10% of antifreezing agent, 0% to 5% of preservative, 0% to 10% of defoaming agent and 40% to 70% of water.
7. The herbicidal composition according to any of claims 1 to 6, wherein the composition is for controlling weeds in cultivated, uncultivated and/or orchards; optionally, the weeds comprise one or more of barnyard grass, semen Euphorbiae, green bristlegrass, herba Acalyphae, amaranthus retroflexus, amaranthus auriculatus, and herba Polygoni Caryophylli.
8. Use of a herbicidal composition according to any of claims 1 to 7 for controlling weeds in cultivated, uncultivated and/or orchards.
9. The use according to claim 8, wherein the weeds comprise one or more of barnyard grass, euphorbia lathyris, green bristlegrass, acalypha australis, amaranthus retroflexus, amaranthus auriculata, polygonum caryophyllum;
alternatively, the herbicidal composition is applied to paddy fields, peanut fields, soybean fields or cotton fields, alternatively, the herbicidal composition is suitable for non-transgenic crops or crops that are not resistant to protoporphyrinogen oxidase inhibitors.
10. A method of applying the herbicide composition formulation of claims 1 to 7, characterized by comprising a spraying method, a bottle throwing method, a granule broadcasting method or a toxic soil method; preferably, the toxic soil method comprises soil mixing or fertilizer mixing;
Alternatively, the herbicidal composition has an active ingredient application amount of 75 to 375g a.i./ha, the herbicide composition has an application dose of flufenacet of 30 to 150g a.i./ha, preferably 50 to 100g a.i./ha, and the oxadiargyl has an application dose of 20 to 150g a.i./ha, preferably 50 to 100g a.i./ha.
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| Publication Number | Publication Date |
|---|---|
| CN118252151A true CN118252151A (en) | 2024-06-28 |
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