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CN119096990A - Herbicidal composition, preparation and use thereof - Google Patents

Herbicidal composition, preparation and use thereof Download PDF

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Publication number
CN119096990A
CN119096990A CN202411201705.XA CN202411201705A CN119096990A CN 119096990 A CN119096990 A CN 119096990A CN 202411201705 A CN202411201705 A CN 202411201705A CN 119096990 A CN119096990 A CN 119096990A
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methyl
herbicide
wheat
weeds
suspension
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Inventor
贾增坡
张璐璐
戴魏真
陈依
梁克印
王征宇
姚满
程春平
邓玉柱
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Anhui Fengle Agrochemical Co Ltd
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Anhui Fengle Agrochemical Co Ltd
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Priority to CN202411201705.XA priority Critical patent/CN119096990A/en
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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<
    • A01N47/38—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< where at least one nitrogen atom is part of a heterocyclic ring; Thio analogues thereof
    • 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
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P13/00—Herbicides; Algicides

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Agronomy & Crop Science (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

本发明公开了一种除草组合物、制剂及其应用，所述除草组合物包括除草有效量的砜吡草唑与噻酮磺隆。本发明还提供了含有该除草组合物的除草剂。本发明中的除草组合物和除草剂为混配农药，其中的活性成分砜吡草唑与噻酮磺隆具有显著的协同增效作用，能够有效防治作物田中的节节麦、雀麦等杂草，提高了株防效、鲜重防效、综合鲜重防效，且降低了用药量，降低了残留，对田间作物安全，对作物田抗性杂草效果明显，解决了小麦田苗后抗性杂草无除草剂防除的问题。

The present invention discloses a herbicidal composition, a preparation and an application thereof, wherein the herbicidal composition comprises a herbicidally effective amount of pyraclostrobin and thiazolinone. The present invention also provides a herbicide containing the herbicidal composition. The herbicidal composition and the herbicide in the present invention are mixed pesticides, wherein the active ingredients pyraclostrobin and thiazolinone have a significant synergistic effect, can effectively prevent and control weeds such as agropyron, brome and the like in crop fields, improve the plant control effect, fresh weight control effect, and comprehensive fresh weight control effect, and reduce the dosage and residue, are safe for field crops, have obvious effects on resistant weeds in crop fields, and solve the problem of post-emergence resistant weed control in wheat fields without herbicides.

Description

Herbicidal composition, formulation and use thereof
Technical Field
The invention belongs to the technical field of pesticide compounding, and particularly relates to a weeding composition containing fenpyrad and thifensulfuron-methyl, a herbicide containing the weeding composition, and application of the weeding composition and the herbicide in crop weed control.
Background
Wheat is a monocotyledonous plant of the Gramineae family, has a large planting area, and is one of the most important food crops worldwide. In the wheat planting process, wheat Tian Rongyi grows wheat field weeds, which compete with wheat for resources such as nutrients, moisture, illumination and the like, so that normal growth of the wheat is affected, and the existence of the wheat field weeds can seriously influence the growth and development of the wheat, so that yield reduction and quality reduction of the wheat are caused.
At present, in order to prevent and control weeds in wheat fields, the main means is still the most economical and effective chemical weeding, but the chemical herbicide with single variety or single action mode is used continuously for a long time, so that the obvious increase of the drug resistance of the weeds is easily caused.
The existing chemical herbicide is reasonably compounded or mixed to realize the effects of expanding the weed spectrum, improving the preventing and killing effect and delaying the drug resistance of weeds, so that the method is one of effective methods for solving the problems. However, chemical herbicides in the pesticide field are numerous in variety, and the complex or mixed multiple agents stay in the phase of additive effect, so that the development of the weeding composition which can enlarge the weed control spectrum, solve the drug resistance of weeds and has the synergistic effect is very practical.
Disclosure of Invention
In view of the above, the primary object of the present invention is to provide a herbicidal composition comprising a herbicidally effective amount of haloxyfop-methyl and thifensulfuron methyl, which is capable of effectively controlling weeds such as festival wheat, brome and the like in crop fields, improving plant control efficiency, fresh weight control efficiency, comprehensive fresh weight control efficiency, reducing the dosage, reducing residues, being safe to field crops, having obvious effect on crop field resistant weeds, and solving the problem of no herbicide control of the wheat field resistant weeds.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The first aspect of the present invention provides a herbicidal composition comprising herbicidally effective amounts of metazachlor and thifensulfuron-methyl.
Wherein, the Pyroxasulfone (Pyroxasulfuron) has the CAS accession number of 447399-55-5 and the structural formula is as follows:
The haloxyfop-methyl is a novel, broad-spectrum and high-activity pre-emergence soil treatment herbicide, is an isoxazole herbicide, belongs to K3 herbicides, has the characteristics of high activity and low dosage, and is suitable for soil treatment of various crops. At present, the composition is mainly used for preventing and controlling annual gramineous weeds and broadleaf weeds, such as gramineous weeds of setaria, crabgrass, barnyard grass and the like, and broadleaf weeds of amaranthus, stramonium, eggplant, abutilon, chenopodium and the like.
Thiosulfuron (Thiencarbazone-Methyl), CAS registry number 317815-83-1, having the following structural formula:
Thiousnesulfuron is a sulfonylaminocarbonyl triazolinone herbicide, which belongs to acetolactate synthase (ALS) inhibitors. The method is to inhibit plant acetolactate synthase to affect the biosynthesis of necessary branched chain amino acid and stop cell division, so as to realize weeding effect. Thiosulfuron has systemic property, can be absorbed by roots and leaves of weeds, has upward conduction capacity, and provides stable weeding effect. At present, the composition is mainly used for preventing and removing grassy weeds and broadleaf weeds in corn fields and cereal fields, has soil spraying and stem and leaf spraying activities, and can be used in early stages before and after buds.
The inventor of the application has carried out deep ploughing for many years in the field of pesticide compounding, and has found that the weeding composition is formed by compounding the metazopyr and the thidiazuron through a large amount of experimental researches, has obvious synergistic effect on weeds in crop fields, and has more remarkable compound weeding activity than the expected sum of the activities of single weeding components and the single activity of the single weeding components. Not only improves plant control effect, fresh weight control effect and comprehensive fresh weight control effect, but also reduces the dosage, reduces residue, is safe to field crops, has obvious effect on resistant weeds in the crop fields, and solves the problem that the resistant weeds have no herbicide after seedling in the wheat fields.
As used herein, a "herbicidally effective amount" refers to the amount of herbicidal component that is required to achieve the desired herbicidal effect, which is a dose that ensures that the weeds are effectively controlled or killed while minimizing the impact on the crop environment. The herbicidally effective amount can be determined by indoor and field trials well known to those skilled in the art.
In some specific embodiments of the invention, the mass ratio of the haloxyfop-methyl to the thifensulfuron-methyl is (11.25-180): 3.125-50.
Preferably, the mass ratio of the fenpyrad to the thidiazuron is (45-90): 13.2-26.04.
In a second aspect, the present invention provides a herbicide comprising the herbicidal composition of the first aspect of the present invention.
In the herbicide disclosed by the invention, the mass percentage of the fenpyrad and the thifensulfuron methyl accounts for 15% -60% of the total amount.
Preferably, in the herbicide, the mass percentage of the fenpyrad and the thifensulfuron-methyl accounts for 45% -65% of the total amount.
More preferably, in the herbicide, the mass percentage of the fenpyrad and the thifensulfuron-methyl accounts for 60 percent of the total amount.
It will be appreciated that the herbicide described in the present invention comprises, in addition to the herbicidal composition described hereinbefore, any agropharmaceutically acceptable carrier and/or adjuvant.
The "carrier" as used herein generally refers to an organic or inorganic, natural or synthetic substance conventionally used in the art. They facilitate the application of the herbicidal active ingredients, the carriers generally being inert and must be agronomically acceptable, particularly for the crop or plant being treated. In some embodiments of the invention, the carrier may be solid, such as clay, kaolin, diatomaceous earth, silica, resins, waxes, solid fertilizers, etc., and the carrier may also be liquid, such as water, alcohols, ketones, petroleum fractions, aromatic or waxy hydrocarbons, chlorinated hydrocarbons, liquefied gases, etc.
The "auxiliary materials" as used in the present invention generally refer to auxiliary materials conventionally used in the art for agricultural chemical formulations, and may be, for example, at least one of an emulsifier, a dispersant, a wetting agent, a binder, a thickener, a thixotropic agent, a penetrating agent, a stabilizer, a chelating agent, a dye, a colorant, and the like.
It will be understood that the specific types of carriers, adjuvants and the like used in the herbicide of the present invention may be any specific materials known to those skilled in the art, and may be specifically differentiated according to the type of the final pesticide formulation, and those skilled in the art may select and add the herbicide according to the needs, so long as the herbicide contains the herbicidal composition of the present invention, which falls within the protection scope of the present invention, and is not specifically described herein,
In the invention, the dosage form of the herbicide can be prepared into any pesticide dosage form in the field, and can be one of wettable powder, water dispersible granules, aqueous emulsion, suspending agent, water aqua and dispersible oil suspending agent. In some embodiments of the invention, the herbicide is in the form of a dispersible oil suspension or suspension.
In a third aspect, the present invention provides the use of a herbicidal composition according to the first aspect of the present invention or a herbicide according to the second aspect of the present invention for controlling unwanted weeds in crop fields.
The crop according to the invention is in particular wheat, the harmful weeds are preferably resistant weeds in the wheat field, which can be, for example, the control of Artemisia annua, bromus, lolium multiflorum and/or Poa pratensis, in particular Artemisia annua and/or Bromus.
In particular, a herbicidally effective amount of the herbicide composition or herbicide may be sprayed onto the soil surface of the crop field to be treated by spraying. In some specific embodiments of the invention, the effective application amount of the weeding composition is 45-90 g of metazachlor/hm 2, and 13.2-26.04 g of thidiazuron/hm 2.
The invention has the beneficial effects that:
The herbicidal composition of the present invention has unexpected synergistic effects, and the herbicidal activity is more remarkable than the sum of the expected activities of the individual herbicidal components, and the individual activities of the individual herbicidal components. Specifically, compared with single agents of haloxyfop-methyl and thifensulfuron-methyl, the weeding composition provided by the invention reduces the dosage, reduces the residue, improves the plant control effects on wheat Tian Jiejie wheat, brome, ryegrass, bluegrass and the like, has fresh weight control effects and comprehensive fresh weight control effects, is safe to field crops, and has obvious effect on resistant weeds in a wheat field.
Drawings
Fig. 1 is an ED 50 isobologram of brome and arthromyodyn in the indoor toxicity test of the invention by compounding thidiazuron and pyraclonil.
Detailed Description
The following detailed description of embodiments of the invention is exemplary and is provided merely to illustrate the invention and is not to be construed as limiting the invention.
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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, unless otherwise specified, the conditions or procedures are not specifically described and the reagents and materials employed are commercially available.
Herbicide preparation embodiment case
Example 1 15% Thiosulfuron-methyl-Prochloraz suspension
In the embodiment, 15% of the thidiazuron-pyrifos suspension is provided, wherein 15% refers to the mass percentage of the two active ingredients of the thidiazuron and the pyrifos to the total weight of the herbicide.
The suspension in the embodiment comprises, by mass, 10% of metazopyr, 5% of thidiazuron, 15% of an emulsifying agent 1601#,5% of a wetting agent LS,4% of a dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of a defoaming agent, 5% of glycerol and deionized water, wherein the total mass is up to 100%.
The preparation method comprises the steps of calculating the feeding amount of each material according to a formula, pumping the materials into a kettle, fully and uniformly mixing, weighing raw materials and other materials, pumping the raw materials into a preparation kettle, starting stirring, continuing stirring for 20 minutes after the feeding is finished, starting sanding after shearing for half an hour at a high speed, uniformly mixing the sanded materials in the post-mixing kettle, adding a proper defoaming agent according to the actual foam size in the production process, sampling and analyzing, discharging and packaging after the raw materials are qualified.
EXAMPLE 2 20% Thiosulfuron-methyl-sulfone metazachlor suspension
In the embodiment, 20% of the thidiazuron-pyrifos suspending agent is provided, wherein 20% refers to the mass percentage of the two active ingredients of the thidiazuron and the pyrifos to the total weight of the herbicide.
The suspension in the embodiment comprises, by mass, 15% of pyrazosulfuron-ethyl, 5% of thiosulfuron-methyl, 15% of an emulsifying agent 1601#,5% of a wetting agent LS,4% of a dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of a defoaming agent, 5% of glycerol and deionized water, wherein the total weight is 100%.
The specific preparation process is the same as in example 1.
Example 3 30% Thiosulfuron-methyl-sulfone metazachlor suspension
In the embodiment, 30% of the thidiazuron-pyrazosulfuron-ethyl suspending agent is provided, wherein 30% refers to the mass percentage of the two active components of the thidiazuron-pyrazosulfuron-ethyl and the pyrazosulfuron-ethyl in the total weight of the herbicide.
The suspension in the embodiment comprises 20% of metazopyr, 10% of thidiazuron, 15% of emulsifying agent 1601#,5% of wetting agent LS,4% of dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of defoaming agent, 5% of glycerol and deionized water which are added to 100% by mass percent.
The specific preparation process is the same as in example 1.
EXAMPLE 4 40% Thiosulfuron-methyl-sulfone metazachlor suspension
In this example, 40% of the thidiazuron-pyrifos suspension is provided, wherein 40% refers to the percentage of the total weight of the two active components of thidiazuron and pyrifos relative to the total weight of the herbicide.
The suspension in the embodiment comprises, by mass, 30% of pyrazosulfuron-ethyl, 10% of thidiazuron, 15% of an emulsifying agent 1601#,5% of a wetting agent LS,4% of a dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of a defoaming agent, 5% of glycerol and deionized water, wherein the total mass is up to 100%.
The specific preparation process is the same as in example 1.
Example 5 50% Thiosulfuron-methyl-sulfone metazachlor suspension
In the embodiment, 50% of the thidiazuron-pyrifos suspension is provided, wherein 50% refers to the mass percentage of the thidiazuron and the pyrifos, which are active components, accounting for the total weight of the herbicide.
The suspension in the embodiment comprises 35% of metazopyr, 15% of thidiazuron, 15% of emulsifying agent 1601#,5% of wetting agent LS,4% of dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of defoaming agent, 5% of glycerol and deionized water which are added to 100% by mass percent.
The specific preparation process is the same as in example 1.
EXAMPLE 6 60% Thiosulfuron-methyl-sulfone metazachlor suspension
In the embodiment, 60% of the thidiazuron-pyrifos suspending agent is provided, wherein 60% refers to the mass percentage of the thidiazuron and the pyrifos, which are active components, accounting for the total weight of the herbicide.
The suspension in the embodiment comprises, by mass, 45% of pyrazosulfuron ethyl, 15% of thioketone-sulfuron, 15% of an emulsifying agent 1601#,5% of a wetting agent LS,4% of a dispersing agent SOPA-270,3% of bentonite, 0.1% of xanthan gum, 0.4% of a defoaming agent, 5% of glycerol and deionized water, wherein the total mass is up to 100%.
The specific preparation process is the same as in example 1.
EXAMPLE 7 50% Thiosulfuron-methyl-sulfone Pyricularia-pyraclostrobin dispersible oil suspension
In this embodiment, a 50% thidiazuron-pyrazosulfuron-ethyl dispersible oil suspension is provided, wherein 50% refers to the mass percentage of two active ingredients of thidiazuron and pyrazosulfuron-ethyl in the total weight of the herbicide.
The suspension in the embodiment comprises 35% of metazopyr, 15% of thidiazuron, 8% of polyoxyalkylene, 9% of castor oil polyoxyethylene ether, 2% of dodecyl benzene sulfonate and corn oil which are added to 100% by mass percent.
The preparation process comprises the steps of fully mixing and blending the raw material components, ball milling and crushing, adjusting and packaging to obtain the dispersible oil suspending agent.
Example 8 60% Thiosulfuron-methyl-sulfone Pyricularia-pyraclostrobin dispersible oil suspension
In this embodiment, 55% of the thidiazuron-pyrazosulfuron-ethyl dispersible oil suspension is provided, wherein 55% refers to the mass percentage of the two active ingredients of the thidiazuron-pyrazosulfuron-ethyl and the pyrazosulfuron-ethyl in the total weight of the herbicide.
The suspension in the embodiment comprises 40% of metazopyr, 20% of thidiazuron, 8% of polyoxyalkylene, 9% of castor oil polyoxyethylene ether, 2% of dodecyl benzene sulfonate and corn oil which are added to 100% by mass percent.
The specific preparation process is the same as in example 7.
Example 9 45% Thiosulfuron-methyl-sulfone Pyricularia-pyraclostrobin dispersible oil suspension
In this embodiment, a dispersible oil suspension of 45% thifensulfuron-methyl and haloxyfop-methyl is provided, wherein 45% refers to the mass percentage of two active ingredients of thifensulfuron-methyl and haloxyfop-methyl in the total weight of the herbicide.
The suspension in the embodiment comprises 30% of metazopyr, 15% of thidiazuron, 8% of polyoxyalkylene, 9% of castor oil polyoxyethylene ether, 2% of dodecyl benzene sulfonate and corn oil which are added to 100% by mass percent.
The specific preparation process is the same as in example 7.
Indoor toxicity test
Under the greenhouse condition, a potting test method is adopted to study the weeding effect of the two-element combination of the fenpyrad and the thidiazuron, and an equivalent line method is adopted to evaluate the type of the contact action of the two components mixed in different proportions, so that a basis is provided for the subsequent field efficacy test.
1. Weeds to be tested are festival wheat and brome (seeds are harvested in the field in the last year, and the germination rate is more than 85%).
2. The test reagent comprises 97% of metazopyr (provided by Anhuifeng peasant chemical Limited liability company research and development center) and 95% of thiosulfuron-methyl (provided by Anhuifeng peasant chemical Limited liability company research and development center). And weighing quantitative raw medicines by adopting a balance, and diluting to the required concentration.
The dose is set by an equal ratio method, wherein the dosage is 3.125, 6.25, 12.5, 25 and 50g (a.i.) of thiosulfuron-methyl per hm 2, the dosage is 11.25, 22.5, 45, 90 and 180g (a.i.) of paraquat-methyl per hm 2, and the two medicaments of the thiosulfuron-methyl and the paraquat-methyl are compounded.
3. The application method is used for sealing wheat and weeds before seedling, adopts an electric sprayer, is provided with a fan-shaped spray head, simulates field spraying and adds 30 kg/mu of water.
4. The times of application are spraying treatment and 1 time of application.
The greenhouse potting method (carried out in an illumination culture room at the temperature of 10-22 ℃) is adopted, soil spraying treatment is carried out on brome and festival wheat after sowing and before seedling, and 4 times of repetition are carried out on each treatment. Fresh weight of the above-ground parts of each treatment was weighed 20d after the drug, and fresh weight inhibition rate was determined. Then, calculating ED 50 values of the tested medicament at each treatment dosage by adopting a dosage logarithm-probability value linear method, drawing an ED 50 equivalent line, evaluating the interaction relation of the two herbicides by the ED 50 equivalent line, and solving the interaction index of the optimal proportioning range.
Wherein fresh weight inhibition (%) = (fresh weight of control-fresh weight of treated weeds)/fresh weight of control x 100;
Interaction index (I) =h/(h-d), where h is the distance from the origin to the addition action line and d is the distance from the point on the equivalent line to the addition action line.
Thiosulfuron was used as a standard agent in the test.
5. Analysis of results
(1) ED 50 value at each treatment dose of test agent
As can be seen from Table 1, the fresh weight inhibition of brome and Artemisia annua by each treatment increased with increasing dose. Dose-response regression analysis was performed on the data of table 1 using GRAPHPAD PRISM 8.4.2 software to obtain ED 50 values for fresh weight inhibition of brome and jew wheat at different ratios as shown in tables 2 and 3. ED 50 values of fresh weight inhibition of brome and festival by halosulfuron-methyl were reduced with increasing dosage of halosulfuron-methyl under the quantitative treatment of thioketosulfuron-methyl (see Table 2), and ED 50 values of fresh weight inhibition of brome and festival by thioketosulfuron-methyl were reduced with increasing dosage of halosulfuron-methyl under the quantitative treatment of thiohalosulfuron-methyl (see Table 3).
TABLE 1 fresh weight inhibition ratio (%) of pyriproxyfen and thifensulfuron-methyl to weeds in different proportions
TABLE 2 fresh weight inhibition ED 50 values of metazopyr on weeds under quantitative Thiousnezoff-sulfuron treatment
TABLE 3 fresh weight inhibition ED 50 values of Thiosulfuron on weeds under quantitative treatment of Pyricularia sulfone
(2) Equivalent line of thifensulfuron methyl and topiramate
The dosage of the thifensulfuron methyl is taken as an abscissa, the dosage of the fenpyr-diethyl is taken as an ordinate, a graph is drawn, and a straight line obtained by connecting ED 50 values of the single dosage of the thifensulfuron methyl and the fenpyr-diethyl on brome and festival is taken as an addition action line of the mixed use of the two herbicides, namely a theoretical equivalent line. And marking another 10 compounded ED 50 values on the coordinate graph, removing edge points, and connecting to form a curve, namely an ED 50 equivalent line diagram (figure 1) of the brome and the festival wheat by compounding the thifensulfuron methyl and the fenpyrad.
As can be seen from fig. 1, the ED 50 values of each combination are below the theoretical equivalent line, and according to the principle of evaluation by the equivalent line method, it is shown that the two agents are mixed in the designed dosage range, and have synergistic effect on brome and festival wheat. The synergy is most obvious in the range between the coordinate points of the two equivalent lines (13.2,90) and (26.04,45), namely, the optimal synergy is achieved in the proportioning range of 13.2-26.04 g of thidiazuron, 45-90 g of a.i./hm 2 and 45-90 g of metazopyr, and hm 2.
Field efficacy test 1
1. The application site is wheat field in yong bridge area of Anhui province, and the previous stubble is corn field. The fertility of the test land is uniform and consistent, and the topography is flat. Soil clay, moderate fertility and moderate humidity. The wheat variety is tobacco farmer 1212, the main annual weeds are festival wheat, brome, etc., and the wheat variety is evenly distributed in the field.
2. The application time is that the wheat is applied after sowing and before seedling, and the wheat is applied in afternoon.
3. The application condition is that the temperature is 16-23 ℃ on a sunny day of the application.
4. The medicine applying dosage and mode is that the medicine applying dosage is 30ml/667m 2, and the medicine liquid is prepared by adopting a secondary dilution method. The medicine machine adopts an electric knapsack sprayer with a fan-shaped spray head, and is sprayed evenly by manpower, and the water consumption is 30kg/667m 2.
5. The test groups were that the suspension prepared in example 4 of the present invention was sprayed at a dose of 30ml/667m 2 with 40% penoxsulam-thidiazuron suspension (group 1), 30ml/667m 2 of 40% penoxsulam (group 2), 40ml/667m 2 of 10% thidiazuron (group 3) and clear water at the same dose.
6. The test method is that each test group and each blank control group are repeated for 4 times, and each test group and each blank control group respectively occupy 120m 2 of the cell area of the test field, and the cells are arranged randomly. Before the application of the herbicide, 4 points are randomly taken before the herbicide is applied in the cells of each test group and the blank control group, the dead weed quantity is investigated after the herbicide is applied for 15d and 30d, the plant control effect is calculated, the plant control effect and the fresh weight control effect are calculated after the herbicide is applied for 30d, the weed quantity (plant/m 2) in the cells of each test group and the blank control group is recorded respectively, the weed plant control effect (%) is calculated, the fresh weight (g/m 2) is weighed by extracting the weeds after the herbicide is applied for 30d, and the fresh weight control effect (%) is calculated.
TABLE 4 results of field efficacy test
As shown in Table 4, after 15d of the composition was applied, the 40% penoxsulam-thidiazuron suspension prepared in example 4 of the present invention had a plant control effect on Artemisia princeps and brome of 98% or more, and the 40% penoxsulam-thidiazuron-methyl suspension had plant control effects on Artemisia princeps and brome of 52.0%, 49.2% and 10% thidiazuron-methyl respectively 46.7%, 39.0%. Compared with each single dose, the 40% penoxsulam-thidiazuron suspending agent in example 4 not only improves the prevention effect on weeds, but also enlarges the weed control spectrum, and has extremely remarkable difference (P < 0.01).
After 30d of the pesticide is applied, the 40% halosulfuron-methyl suspension prepared in the embodiment 4 of the invention has the control effect on the festival wheat and the brome above 98%, the 40% halosulfuron-methyl has the control effect on the fresh weight of the festival wheat and the brome above 72.7%, 64.6% and the 10% halosulfuron-methyl has the control effect on the fresh weight of the festival wheat and the brome above 68.6% and 60.7%, compared with each single agent, the 40% halosulfuron-methyl suspension in the embodiment 4 not only improves the control effect on weeds, but also enlarges the weed killing spectrum, and has extremely obvious difference (P < 0.01).
The test results show that compared with the single-dose halosulfuron-methyl suspension concentrate, the 40% haloxyfop-methyl-thiosulfuron-methyl suspension concentrate has improved plant control effect and fresh weight control effect on the festival wheat and the brome in the field and is safe to the crops in the field.
Field efficacy test II
1. The application site is Cai Xianxiao wheat fields in standing horse shop in Henan province, and the previous crop is corn fields. The fertility of the test land is uniform and consistent, and the topography is flat. The soil has the advantages of sandy loam, moderate fertility and moderate humidity. The variety is safe 11, the annual weeds of wheat Tian Zhuyao are festival wheat, brome and the like, and the distribution is uniform.
2. The application time is that the wheat is applied after sowing and before seedling, and the wheat is applied in afternoon.
3. The application condition is that the temperature is 15-22 ℃ on a sunny day of the application.
4. The application dosage and mode are that the application dosage is 20 mL/mu, and the liquid medicine is prepared by adopting a secondary dilution method. The medicine machine adopts an electric knapsack sprayer with a fan-shaped spray head, and is sprayed evenly by manpower, and the water consumption is 30kg/667m 2.
5. The test groups were that the suspension prepared in example 6 of the present invention was sprayed at a dose of 20mL/667m 2 with 60% of pyrazosulfuron ethyl, 30mL/667m 2, 10% of pyrazosulfuron ethyl, 40mL/667m 2, 3, and the same amount of clear water.
6. The test method is that each test group and each blank control group are repeated for 4 times, and each test group and each blank control group respectively occupy 120m 2 of the cell area of the test field, and the cells are arranged randomly. Before the application of the herbicide, 4 points are randomly taken before the herbicide is applied in the cells of each test group and the blank control group, the dead weed quantity is investigated after the herbicide is applied for 15d and 30d, the plant control effect is calculated, the plant control effect and the fresh weight control effect are calculated after the herbicide is applied for 30d, the weed quantity (plant/m 2) in the cells of each test group and the blank control group is recorded respectively, the weed plant control effect (%) is calculated, the fresh weight (g/m 2) is weighed by extracting the weeds after the herbicide is applied for 30d, and the fresh weight control effect (%) is calculated.
Table 5 field efficacy test two results
As shown in the test results in Table 5, after 15d of the application, the 60% penoxsulam-thidiazuron suspension prepared in example 6 of the present invention had a plant control effect on Artemisia princeps and brome of 98% or more, and the 40% penoxsulam had plant control effects on Artemisia princeps and brome of 60.0%, 57.1% and the 10% thidiazuron had plant control effects on Artemisia princeps and brome of 52.3% and 53.1% respectively.
After 30d of the pesticide is applied, the plant prevention effect of the suspension containing 60% of the pyrazosulfuron ethyl and the thidiazuron prepared in the embodiment 6 of the invention on the festival wheat and the brome is over 98%, the plant prevention effect of 40% of the pyrazon ethyl on the festival wheat and the brome is respectively 60.9%, 61.4% and the plant prevention effect of 10% of the thidiazuron on the festival wheat and the brome is respectively 56.5% and 59.6%.
The fresh weight of the pesticide 30d after weed is pulled out is weighed, the fresh weight control effect of the 60% halosulfuron-methyl-containing suspending agent prepared in the embodiment 6 of the invention on the festival wheat and the brome is over 99%, the fresh weight control effect of 40% halosulfuron-methyl on the festival wheat and the brome is over 62.0%, and the fresh weight control effect of 10% of the halosulfuron-methyl on the festival wheat and the brome is over 60.0%.
The test results show that compared with each single dose, the suspending agent containing 60% of pyrazosulfuron-ethyl and thiosulfuron prepared in the embodiment 6 not only improves the plant control effect and fresh weight control effect on field weeds, but also enlarges the weed control spectrum, has extremely obvious difference (P is less than 0.01), and is safe for field crops.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A herbicidal composition, which is characterized in that, the weeding composition comprises an effective weeding amount of fenpyrazamine and thifensulfuron-methyl.
2. The weeding composition according to claim 1, wherein the mass ratio of the haloxyfop-methyl to the thifensulfuron-methyl is (11.25-180) (3.125-50).
3. The weeding composition according to claim 1, wherein the mass ratio of the haloxyfop-methyl to the thifensulfuron-methyl is (45-90) (13.2-26.04).
4. A herbicide comprising the herbicidal composition according to any one of claims 1 to 3.
5. The herbicide of claim 4, wherein the mass percent of the haloxyfop-methyl and the thifensulfuron-methyl in the herbicide accounts for 15% -60% of the total mass.
6. The herbicide of claim 4, wherein the mass percent of the haloxyfop-methyl and the thifensulfuron-methyl in the herbicide accounts for 45% -65% of the total mass.
7. The herbicide of claim 4, wherein the mass percent of the haloxyfop-methyl and the thifensulfuron-methyl in the herbicide accounts for 60% of the total mass.
8. The herbicide of claim 4, further comprising any agropharmaceutically acceptable carrier and/or adjuvant.
9. The herbicide of claim 4, wherein the herbicide is in the form of one of wettable powder, water dispersible granule, aqueous emulsion, suspension, suspoemulsion, aqueous solution and dispersible oil suspension;
Preferably, the herbicide is in the form of a dispersible oil suspension or suspension.
10. Use of a herbicidal composition as claimed in any of claims 1 to 3 or a herbicide as claimed in any of claims 4 to 9 for controlling harmful weeds in crop fields;
preferably, the crop field is a wheat field and the unwanted weeds are festival wheat, brome, ryegrass and/or bluegrass;
Preferably, the unwanted weeds are festival wheat and/or brome;
Preferably, the effective application amount of the weeding composition is 45-90 g of metazopyr, 13.2-26.04 g of thiosulfuron-methyl, a.i./hm 2 and a.i./hm 2.
CN202411201705.XA 2024-08-29 2024-08-29 Herbicidal composition, preparation and use thereof Pending CN119096990A (en)

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