Summary of the invention
The purpose of the present invention is being directed to herbicide resistance and pedo relict problem in practical applications, filter out containing two
The herbicide diflufenican of kind different weeding principles and thiophene ketone sulphur is grand is compounded, to improve herbicide prevention effect, delays
Resistance generates, and reduces amount of application, reduces control cost.
It is a further object of the present invention to provide a kind of application of above-mentioned composition in agriculture field controlling weeds.
The purpose of the present invention can be achieved by the following measures:
The present invention provides a kind of Herbicidal combinations with synergistic effect, contain effective constituents A and B in the composition,
Effective constituents A is diflufenican, and effective component B is that thiophene ketone sulphur is grand.
Inventor is found by experiment that above-mentioned Herbicidal combinations synergy is obvious, it is often more important that amount of application is reduced, and reduction makes
Use cost.Different from the compound structure type of component B containing component A, mechanism of action is different, and the two compounding can expand weeding
Spectrum, and generation and the development speed of Weed Resistance can be delayed to a certain extent, and no interactions between component A and component B
Resistance.
The effective component of the present composition can only include A and B, can also be in the base for not influencing composition overall performance
On plinth, other effective components are further included.
In a kind of scheme, the effective constituents A of Herbicidal combinations of the present invention and the weight ratio of B are 1:0.03~30.
In another scheme, the effective constituents A of Herbicidal combinations of the present invention and the weight ratio of B are 1:0.05~20.
In another scheme, the effective constituents A of Herbicidal combinations of the present invention and the weight ratio of B are 1:0.1~10.
In a preferred solution, the weight ratio between two component of A and B can be arbitrarily in the range of following proportions
Be adjusted: 1:0.03,1:0.04,1:0.05,1:0.06,1:0.07,1:0.08,1:0.09,1:0.1,1:0.2,1:0.3,
1:0.4,1:0.5,1:0.6,1:0.7,1:0.8,1:0.9,1:1,1:2,1:3,1:4,1:5,1:6,1:7,1:8,1:9,1:10,
1:11,1:12,1:13,1:14,1:15,1:16,1:17,1:18,1:19,1:20,1:21,1:22,1:23,1:24,1:25,1:
26,1:27,1:28,1:29,1:30 can also be matched at any of the above two and be selected in composed range, these ratios
Example can be understood as weight ratio, also may include molar ratio.
Dosage form pesticide-acceptable can be made by effective component and insecticides adjuvant in composition of the invention jointly.
The mass content of effective component can be 2~95%, preferably 5~80% in composition of the invention.
To give full play to function and effect of the invention, the present composition can also be with other pesticide (such as fungicide, desinsection
Agent, herbicide, plant growth regulator), fertilizer etc. be used in mixed way, it is to commonly use disclosed in the prior art that these are mixed therewith
Pesticide or fertilizer.Suitable fertilizer includes: inorganic fertilizer or organic fertilizer, and specific fertilizer such as contains one of nitrogen, phosphorus, potassium
Or several a great number of elements, or containing one or more of copper, iron, manganese, zinc, boron, calcium, magnesium, sulphur etc. microelement, or contain corruption
Grow at least one mixture of the fertilizer such as acid, amino acid.
It may include carrier, auxiliary agent and/or surfactant in the present composition.It can be mixed during application
Common auxiliary agent.
Suitable auxiliary agent can be solid or liquid, they are usually common substance during formulation, such as day
Right or regenerated minerals, solvent, dispersing agent, wetting agent, adhesive, thickener, adhesive or fertilizer.
The method of administration of the present composition includes the aerial part that composition of the invention is used for plant growth, especially
It is leaf portion or blade face.The growth place of plant, such as rice field can be soaked with the liquid preparation of composition, or by composition
It is applied in soil in solid form, such as in granular form (soil application), composition can be entered by soil through plant root
In plant (systemic action).
These compositions can only include that active constituent (also known as effective component) is administered, can also with additive or
Auxiliary agent mixes together, therefore composition of the invention can be prepared into various dosage forms, for example, wettable powder, suspending agent,
Dispersible oil-suspending agent, aqueous emulsion, missible oil, water dispersible granules etc..According to the property of these compositions and application composition institute
Purpose to be achieved and ambient conditions can choose composition to be sprayed, atomizing, dust, broadcast sowing or sprinkle the side poured or the like
Method application.
Composition of the invention can be prepared into various dosage forms by known method, such as can by effective component with help
Agent can uniformly mix together with surfactant when needing, grind, be prepared into required agent such as solvent, solid carrier
Type.
Above-mentioned solvent can be selected from aromatic hydrocarbon, preferably contain 8-12 carbon atom, such as xylene mixture or substituted benzene, phthalein
Esters of gallic acid, such as two octanoic acid of Dibutyl phthalate or phthalandione, fat hydrocarbon, such as thiacyclohexane or paraffin, the ether of pure and mild ethylene glycol and they
And ester, such as ethyl alcohol, ethylene glycol, ethylene glycol monomethyl;Ketone, such as cyclohexanone, highly polar solvent, such as N- methyl -2- pyrrolidines
Ketone, dimethyl sulfoxide or dimethylformamide and vegetable oil or vegetable oil, such as soybean oil.
Above-mentioned solid carrier, such as usually natural mineral fillers, such as talcum, kaolinite for pulvis and dispersible agent
Soil, montmorillonite or atlapulgite.In order to manage the physical property of composition, polymolecularity silicic acid or polymolecularity can also be added
Adsorpting polymerization object carrier, such as granulated adsorptive carriers or non-adsorbed carrier, suitable granulated adsorptive carriers are porous types, it is such as floating
Stone, bentonite or bentonite;Suitable non-adsorbed carrier such as calcite or sand.Further, it is possible to use a large amount of inorganic in nature or having
The prefabricated material to granulate of machine property is as carrier, especially dolomite.
The chemical property of effective component in composition according to the present invention, suitable surfactant are sulfomethylated lignin
Acid, naphthalene sulfonic acids, phenolsulfonic acid, alkali salt or amine salt, alkylaryl sulfonates, alkyl sulfate, alkylsulfonate, fat
Alcohol sulfate, fatty acid and sulphated fatty alcohol glycol ether, there are also the condensation product of sulfonated naphthalene and naphthalene derivatives and formaldehyde, naphthalene or
The condensation product of naphthalene sulfonic acids and phenol and formaldehyde, NONIN HS 240, ethoxylated isooctyl-phenol, octyl phenol, nonyl phenol,
Alkylaryl polyglycol ether, tributyl benzene polyglycol ether, three stearyl phenyl polyglycol ethers, alkyl aryl polyether alcohol,
Ethoxylated castor oil, polyoxyethylene alkyl ether, ethylene oxide condensation product, ethoxylation polyoxypropylene, laurel acid polyethylene glycol
Ether acetal, sorbitol ester, lignin sulfite waste liquor and methylcellulose.
Two kinds of effective components show as synergistic effect in composition of the invention, and the activity of the composition is than using individualized
The independent activity of the expected summation of activity and single compound of closing object is more significant.Synergistic effect shows as allowing amount of application
Reduce, broader weeding control spectrum, quick, more longlasting control efficiency, by only once or a small number of application several times more preferably
Control weeds and broaden the possible administration interval time.These characteristics are to prevent and kill off in control weeds practice process especially
It needs.
In terms of Herbicidal combinations of the invention can be applicable to agriculture field prevention and treatment crop weeds, iron amaranth is especially prevented and treated
Dish, humulus grass, field bindweed, sowthistle.
The other features of Herbicidal combinations of the invention shown are mainly shown as: 1, due to two lists of this composition
Agent chemical structure is widely different, and the mechanism of action is entirely different, and cross resistance is not present, and two single dose exclusive uses can be delayed to be produced
Raw resistance problem;2, composition of the invention is good to crop safety, preventive effect.Tests prove that herbicidal composition of the present invention
Chemical property is stablized, and synergy is significant, shows apparent synergy and complementation to controlling object.
Embodiment 9:20% diflufenican thiophene ketone sulphur precititation emulsion
Diflufenican 10%, thiophene ketone sulphur grand 10%, methyl naphthalene sulfonate formaldehyde condensate 4%, toluene 11%, ammonium sulfate
5%, benzoate 2%, water complements to 100%.
Two, drug effect verification test
(1) Assays Example
Using diflufenican as standard agent, disease index and control efficiency are calculated.Control efficiency is converted into probability
It is worth (y), liquor strength (μ g/ml) is converted into logarithm (x), calculates concentration in virulence equation and inhibition with least square method
EC50 calculates the toxicity index grade co-toxicity coefficient (CTC) of medicament according to Sun Yunpei's Method.Toxicity test the results are shown in Table 1.
Survey toxicity index (ATI)=(standard agent EC50/ reagent agent EC50) * 100
Percentage composition+B medicament toxicity index * the mixture of A in theoretical toxicity index (TTI)=A medicament toxicity index * mixture
The percentage composition of middle B
Co-toxicity coefficient (CTC)=[mixture surveys toxicity index (ATI)/mixtures theoretical toxicity index (TTI)] * 100
CTC≤80, composition show as antagonism, 80 < CTC < 120, and composition shows as summation action, and CTC >=
120, composition shows as synergistic effect.
1, diflufenican tests the toxicity test of acalypha copperleaf with grand compound of thiophene ketone sulphur
1 diflufenican of table is compounded with the grand different ratio of thiophene ketone sulphur analyzes (one) to the toxicity test of acalypha copperleaf
As a result (table 1) shows that diflufenican and thiophene ketone sulphur are grand between proportion 1~30:1~30, and co-toxicity coefficient exists
122 or more, illustrate diflufenican with thiophene ketone sulphur is grand compounds preventing and kill off with significant synergistic function to acalypha copperleaf.Experiment
It was found that when diflufenican and the grand proportion of thiophene ketone sulphur not within the scope of the invention when, the two is difficult have association to acalypha copperleaf
Same synergistic effect.
2, diflufenican tests (two) to the toxicity test of humulus grass with grand compound of thiophene ketone sulphur
2 diflufenican of table and the grand toxicity test interpretation of result compounded to humulus grass of thiophene ketone sulphur
As a result (table 2) shows that diflufenican and thiophene ketone sulphur are grand between proportion 1~30:1~30, and co-toxicity coefficient exists
126 or more, illustrate diflufenican with thiophene ketone sulphur is grand compounds preventing and kill off with significant synergistic function to humulus grass.Experiment hair
It is existing, when diflufenican and the grand proportion of thiophene ketone sulphur not within the scope of the invention when, the two is difficult that there is collaboration to increase to humulus grass
Effect effect.
(2) field control effectiveness test
1, diflufenican and the grand field control effect of thiophene ketone sulphur are verified using embodiment produced by the present invention.
It is expected that preventive effect (%)=X+Y-XY/100 (wherein, X, Y are single dose preventive effect)
3. diflufenican of table and the grand field efficiency test result compounded to field bindweed and sowthistle of thiophene ketone sulphur
Measurement result (table 3) shows that diflufenican and thiophene ketone sulphur are grand and compounds to controlling weeds field bindweed and sowthistle
Preventive effect significantly improves, and illustrates that the two compounding has significant synergistic function to field bindweed and sowthistle.