CN112425605A

CN112425605A - Weeding composition containing saflufenacil and glyphos

Info

Publication number: CN112425605A
Application number: CN202011473090.8A
Authority: CN
Inventors: 李略; 韦茂春; 王超; 杨淑兰; 余青云; 方冬林; 易芬远; 罗燕梅
Original assignee: Guangxi Sanjing Chemical Science & Technology Co ltd; Guangxi Research Institute of Chemical Industry
Current assignee: Guangxi Sanjing Chemical Science & Technology Co ltd; Guangxi Research Institute of Chemical Industry
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-03-02
Anticipated expiration: 2040-12-15
Also published as: CN112425605B

Abstract

The invention relates to the technical field of pesticides, and particularly relates to a weeding composition. The weeding composition comprises, by weight, 0.1-90 parts of saflufenacil and 1-100 parts of glyphosine. The invention is a herbicide composition with high cost performance, low toxicity and high efficiency, which can be applied to farmlands or non-farmlands to effectively prevent and control harmful weeds.

Description

Weeding composition containing saflufenacil and glyphos

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to a herbicide composition containing saflufenacil and glyphos.

Background

In recent years, with the increasing demand of creating new pesticide compounds, the cost of registering, applying and researching new compounds is higher and higher, and under the condition of observing policies of high efficiency, low toxicity, selectivity and safety and saving the cost of medication, the method is an effective method for solving the problem by reasonably screening and compounding the existing compounds.

Saflufenacil, other names: babaijin, the molecular formula is: c₁₇H₁₄ClF₄N₄O₅S, chemical name: n' - [ 2-chloro-4-fluoro-5- (3-methyl-2, 6-dioxo-4- (trifluoromethyl) -3, 6-dihydro-1 (2H) -pyrimidine) benzoyl]-N-isopropyl-N-methylsulfamide. The saflufenacil is a biocidal herbicide, can effectively prevent and kill more than 70 kinds of weeds on more than 30 kinds of crops such as corn, sorghum, soybean, cotton, fruit trees and the like by preventing the action of chlorophyll biosynthesis, particularly can effectively prevent and kill more than 70 kinds of broad-leaved weeds such as groundsel, amaranthus retroflexus, purslane, erigeron, east sunflower, black nightshade, xanthium and the like, also comprises weeds with resistance to glyphosate and ALS inhibitors such as quinoa, erigeron breviscapus, russian thistle, amaranthus palmeri and ragweed and the like, has high safety on crops, can be applied to various crop fields and non-cultivated lands due to rapid degradation of soil residue, has small crop rotation limitation, and is praised as a new herbicide which is developed most successfully from twenty years by basf company, and represents a new level of broad-leaved weed control.

Glyphosine is also known as glyphosine, and the chemical name is as follows: n, N-bis (phosphono-methyl) glycine, glyphosate is a plant growth inhibitor, the first commercial sugarcane ripener in the United states is mainly used for sugar-increasing and ripening of sugarcane and beet; the method is used for defoliating and ripening cotton. The glyphosate can delay the growth of crops, reduce absorption and consumption, increase sugar accumulation and promote ripening when the concentration of the glyphosate is low. It is a herbicide at high concentrations.

At present, no report of a weeding composition consisting of glyphosine and saflufenacil exists.

Disclosure of Invention

The invention provides a compound combined weeding composition containing saflufenacil and glyphos. The invention prepares the herbicide composition with high cost performance, low toxicity and high efficiency by combining and compounding the prior herbicide compounds and finally screening.

The invention also aims to solve the limitation of single herbicide for preventing and controlling weeds, the two single herbicides are compounded and combined to increase the weed control spectrum of the weeding composition, improve the pesticide effect, delay the resistance of the weeds and prolong the service life of each component, almost all the weeds in a farm field can be solved by using the weeding composition once, the pesticide consumption of farmers is reduced, the pesticide cost of the farmers is reduced, and the weeding composition has certain safety for later crops.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a weeding composition which is characterized by consisting of 0.1-90 parts by weight of saflufenacil and 1-100 parts by weight of glyphosine.

Preferably, the weeding composition consists of 0.1-70 parts of saflufenacil and 5-100 parts of glyphosine in parts by weight.

More preferably, the weeding composition consists of 1-10 parts of saflufenacil and 20-70 parts of glyphosine in parts by weight.

The weeding composition comprises 2 parts of saflufenacil and 30 parts of glyphosine in parts by weight. Or, the weeding composition consists of 1 part of saflufenacil and 30 parts of glyphosine in parts by weight.

The invention also provides a herbicide which consists of the weeding composition and an agriculturally and pharmaceutically acceptable auxiliary agent.

Preferably, the herbicide also comprises one or more other pesticidally active ingredients. For example other classes of herbicides, insecticides, fungicides, fertilizers, plant growth regulators, biostimulants and safeners or else additives and/or pesticide adjuvants customary in plant protection.

The herbicide is prepared into any dosage form according to a conventional preparation method, and can be wettable powder, water dispersible granules, suspending agents, dry suspending agents, soluble agents, dispersible oil suspending agents and the like.

The invention also provides the application of the weeding composition or the herbicide in preventing and removing harmful weeds in farmland or non-farmland.

The frequency of use and the amount of use of the herbicidal composition of the present invention vary little with crops, weeds, weather conditions.

Effective control can be achieved by using appropriate dosage.

Compared with the prior art, the invention has the following advantages:

1. high herbicidal activity and obvious compound preventing and killing effect.

2. Different action mechanisms have complementary advantages, synergistic interaction and reasonable proportion.

3. Increasing the weed control spectrum, delaying the weed resistance and prolonging the service life of each component.

4. The components are compounded, the effects are superposed, the dosage is reduced, and the pesticide cost of farmers is reduced.

Detailed Description

For a better understanding of the nature of the present invention, its contents are further described below in conjunction with the following examples, which are not to be considered as limiting, but are to be construed to illustrate the present invention and all changes, substitutions and modifications that do not depart from the spirit and principles of the present invention are intended to be within the scope of the appended claims.

First, an embodiment

Example 1: 50% aqueous suspension

The formula (weight ratio) is as follows: 10% of saflufenacil, 40% of glyphosine, 10% of a dispersant NNO, 14% of fatty alcohol-polyoxyethylene ether, 6% of glycol, 3% of xanthan gum and the balance of water to 100%.

The preparation method comprises the following steps: firstly diluting glyphosine with water, then adding saflufenacil to prepare a mixed solution, then adding an auxiliary dispersant NNO, glycol and fatty alcohol-polyoxyethylene ether, grinding, mixing with xanthan gum, and uniformly shearing at a high speed to obtain the water suspension dosage form.

Example 2: 45% water dispersible granule

The formula (weight ratio) is as follows: 20% of saflufenacil, 25% of glyphosine, 18% of sodium dodecyl benzene sulfonate, 15% of fatty alcohol-polyoxyethylene ether dispersant, 4% of sodium sulfate, 10% of pottery clay and 100% of bentonite.

The preparation method comprises the following steps: uniformly mixing the glyphosine, the saflufenacil, the auxiliary agent and the like, crushing the mixture by an airflow crusher, then granulating the mixture in an extrusion granulator, and drying the mixture by a fluidized bed dryer to obtain the water dispersible granule. .

Example 3: 32% dispersible oil suspension

The formula (weight ratio) is as follows: 2% of saflufenacil, 30% of glyphosine, 10% of sodium lignosulfonate, 12% of YUS-110 emulsifier, 3% of glycol, 1% of xanthan gum, 2% of epoxidized soybean oil, 1% of silicone oil and the balance of vegetable oil (soybean oil) to 100%.

The preparation method comprises the following steps: weighing saflufenacil and glyphosine into a container, adding an emulsifier, a dispersant and soybean oil, mixing, shearing and dispersing at a high speed, sanding by using a sand mill, and filtering to obtain the dispersible oil suspending agent.

Example 4: 71% water dispersible granule

The formula (weight ratio) is as follows: 6% of saflufenacil, 55% of glyphosine, 8% of sodium dodecyl sulfate, 5% of SP-2836 polycarboxylate dispersant, 2% of sodium sulfate, 10% of kaolin and the balance of diatomite to 100%.

The preparation method comprises the following steps: uniformly mixing the glyphosine, the saflufenacil, the auxiliary agent and the like, crushing the mixture by an airflow crusher, then granulating the mixture in an extrusion granulator, and drying the mixture by a fluidized bed dryer to obtain the water dispersible granule.

Example 5: 21% oil suspending agent

The formula (weight ratio) is as follows: 1% of saflufenacil, 20% of glyphosine, 10% of sodium dodecyl benzene sulfonate, 3060% of emulsifier 15%, 6% of glycol, 2% of castor oil polyoxyethylene ether, 5% of fatty acid polyoxyethylene ether, 1% of silicone oil and the balance of methyl oleate or vegetable oil to 100%.

The preparation method comprises the following steps: firstly, mixing oil and an auxiliary agent according to a certain amount, uniformly shearing at a high speed, adding glyphosine and saflufenacil, continuously shearing and uniformly mixing to prepare a mixed solution, and then grinding in a horizontal sand mill to obtain the suspension preparation.

Example 6: 71% water dispersible granule

The formula (weight ratio) is as follows: 1% of saflufenacil, 70% of glyphosine, 8% of sodium dodecyl sulfate, 5% of SP-2836 polycarboxylate dispersant, 2% of sodium sulfate, 10% of kaolin and the balance of diatomite to 100%.

Example 7: 30% water dispersible granule

The formula (weight ratio) is as follows: 10% of saflufenacil, 20% of glyphosine, 2% of flour, 8% of sodium dodecyl sulfate, 5% of SP-2836 polycarboxylate dispersant, 3% of light calcium carbonate, 10% of diatomite and the balance of kaolin to 100%.

Example 8: 80% water dispersible granule

The formula (weight ratio) is as follows: 10% of saflufenacil, 70% of glyphosine, 3% of flour, 5% of sodium dodecyl sulfate, 3% of polycarboxylate and the balance of soluble starch to 100%.

Example 9: 5.1% emulsifiable concentrate

The formula (weight ratio) is as follows: 0.1% of saflufenacil, 5% of glyphosine, 3% of tetrahydrofuran, 6% of 504#, 8% of 602# and ethyl acetate to make up 100%.

The preparation method comprises the following steps: the glyphosine, the saflufenacil, the auxiliary agent and the like are uniformly mixed and are subjected to high-speed shearing and dispersion to obtain the missible oil.

Example 10: 75% water dispersible granule

The formula (weight ratio) is as follows: 70% of saflufenacil, 5% of glyphosine, 3% of flour, 5% of sodium dodecyl sulfate, 3% of polycarboxylate and the balance of soluble starch to 100%.

Example 11: 17% soluble liquid

The formula (weight ratio) is as follows: 7% of saflufenacil, 10% of glyphosine, 5% of xylene, 8% of tetrahydrofuran, 3% of ethyl acetate, 3060# 10% of auxiliary agent, 30% of alkyl glycoside and the balance of water to 100%.

The preparation method comprises the following steps: firstly, using solvent to dissolve saflufenacil, adding adjuvant 3060#, adding glyphosine to dissolve, then adding alkyl glycoside stabilizing system to obtain mixed liquor, then slowly adding water to mix with the solution, high-speed shearing and uniformly mixing so as to obtain the soluble liquor preparation.

Example 12: 1.1% emulsifiable concentrate

The formula (weight ratio) is as follows: saflufenacil 0.1%, glyphosine 1%, tetrahydrofuran 3%, 504# 6%, 602# 8%, ethyl acetate make up to 100%.

Example 13: 50.05% water dispersible granule

The formula (weight ratio) is as follows: 50% of saflufenacil, 0.05% of glyphosine, 13% of flour, 12% of sodium dodecyl sulfate, 13% of polycarboxylate and the balance of soluble starch to 100%.

Example 14: 9.1% emulsifiable concentrate

The formula (weight ratio) is as follows: 9% of saflufenacil, 0.1% of glyphosine, 3% of tetrahydrofuran, 6% of 504# 8%, and ethyl acetate for making up 100%.

The preparation method comprises the following steps: the glyphosine, the saflufenacil, the auxiliary agent and the like are uniformly mixed and dispersed through high-speed shearing, so that the cream dosage form can be obtained.

Example 15: 19% soluble liquid

The formula (weight ratio) is as follows: 9% of saflufenacil, 10% of glyphosine, 5% of xylene, 8% of tetrahydrofuran, 3% of ethyl acetate, 3060# 10% of auxiliary agent, 30% of alkyl glycoside and the balance of water to 100%.

Second, indoor Activity measurement

The test method comprises the following steps:

the test target weed seeds (amaranthus retroflexus, purslane and black nightshade) are respectively sowed in plastic flowerpots (with trays) which are filled with soil with the concentration of 2.03 percent of organic matter without herbicide, the pH value of the soil is 6.7, the diameter of the soil is 16cm, the depth of the soil is 10cm, 30 amaranthus retroflexus, purslane and black nightshade seeds are sowed in each pot, dry soil with the thickness of 1cm is covered, the soil is wetted and soaked, the pots are placed in a greenhouse for cultivation, and water is often added into the trays at the bottoms of the flowerpots to keep the soil moist. And (3) during the period that the amaranthus retroflexus, the purslane and the black nightshade grow to 2 leaves, uniformly and uniformly strong seedlings are reserved, 15 seedlings are reserved for each pot of the black nightshade, and 10 seedlings are reserved for each pot of the amaranthus retroflexus and the purslane. Then carrying out spray treatment on the stems and leaves of the herbicide. And naturally air-drying the liquid medicine of the leaf of the seedling to be tested, transferring the liquid medicine into a sunlight greenhouse for conventional culture, observing the survival condition of the treated weeds by eye at regular intervals, investigating 21 days after the liquid medicine is used, and calculating the control effect of each treated actual plant.

Result investigation and data statistical analysis:

the data statistical analysis method is referred to the Colby method in NY/T1155.7-2006 (indoor bioassay criteria for pesticides herbicide part 7: combined action assay for compounding).

The actual survival rate E of weeds of single dose and each mixed dose is calculated according to the formula (1):

theoretical weed survival rate of the mixture E₀Calculating according to the formula (2):

in the formula:

weed survival rate of A-herbicide 1

Weed survival rate of B-herbicide 2

Weed survival rate of C-herbicide 3

Weed survival of N-herbicide N

n-is the number of varieties of mixed herbicides

E₀E > 10% is a synergistic effect; e₀-E<-10% is antagonism; e₀An E value of. + -. 10% is additive effect.

TABLE 1. Combined toxicity determination of saflufenacil and gansuan mixture on Amaranthus retroflexus (Colby method)

Table 2. Combined toxicity determination of saflufenacil and glyphosine mixture on purslane (Colby method)

TABLE 3 Combined toxicity determination of saflufenacil and glyphosine mixture to Solanum nigrum (Colby method)

Calculating the theoretical survival rate E of each mixed combination by using a Colby method₀Value, actual survival rate E value and difference between theoretical value and actual value (E)₀-E). The results show that the theoretical survival rate for combinations of Amaranthus retroflexus A and B is greater than the observed survival rate by a difference of 8.35-15.1, wherein A + B is at a dose (60+2700,90+2700 g a.i./hm)²) When used in combination, E₀E values between. + -. 10%, as additive, other test combinations E₀E > 10%, both expressed as a synergistic effect, with a low dose (60 g a.i./hm)²) And B Low dose (900 g a.i./hm)²) When mixed use E₀The maximum E value reaches 15.1, and the synergistic effect is most obvious. The second is a low dose (30 g a.i./hm)²) And B Low dose (900 g a.i./hm)²) Treatment for mixing, at this time E₀The E value reaches 14.5, and the synergistic effect is also very obvious (see table 1).

For purslane, the theoretical survival rate of each combination is larger than the observed survival rate, and the difference is between 7.2 and 16.6, wherein A + B is in the dosage (60+1800, 60+2700,90 +1800, 90+2700 g a.i./hm)²) When used in combination, E₀E values between. + -. 10%, as additive, other test combinations E₀E is more than 10 percent, and the effects are shown as synergy. Wherein A is at a low dose (30 g a.i./hm)²) And B at low dose (900, 1800 g a.i./hm)²) When mixed use E₀The E value is the largest, which reaches 16.2 and 16.6 respectively, and the synergy is the most obvious (see table 2).

For Solanum nigrum, the theoretical survival rate of each combination is greater than the observed survival rate, and the difference is 7.13-15.6, wherein A + B is at the dosage (90+1800, 90+2700 g a.i./hm)²) When used in combination, E₀E values between. + -. 10%, as additive, other test combinations E₀-E＞10%，All show synergistic effect. Wherein A is at a low dose (60 g a.i./hm)²) And B at low dose (900 g a.i./hm)²) When mixed use E₀Maximum value of E, when E is₀The E value reaches 15.6, and the synergistic effect is also better than that of other combinations (see table 3).

And (3) test results: as can be seen from the results of indoor bioassay of tables 1, 2 and 3, the saflufenacil and the glyphos are compounded and used in combination, so that the synergistic and additive effects are good, the actual control effect on weeds is better than that of a single agent, and the herbicide composition is prepared from the saflufenacil (A): the glycylated phosphorus (B) =60+900 (2 + 30) is most preferable.

Third, field efficacy test for preventing and killing off non-cultivated land weeds

Reagent to be tested: a saflufenacil and glyphos compounded preparation.

Control agents: saflufenacil and glyphos single agent.

The control object is: common weeds occurring in uncultivated areas, black nightshade, quinoa, Japanese thistle herb and erigeron breviscapus.

The application method comprises the following steps: during the period of vigorous growth of weeds, the mixture is uniformly mixed with water, stems and leaves for spray treatment.

Test investigation: the control effect of the weed plants is measured 7 days after the application of the herbicide, the control effect and the fresh weight control effect of the weed plants are measured 14 days after the application of the herbicide, and a 5-point sampling method is adopted, wherein each point is 1m²Sampling investigation is carried out.

TABLE 4 results of weed control in uncultivated areas with different test agents

The field test result shows that: the herbicide composition has obvious effect of preventing and killing weeds in non-cultivated land after the saflufenacil and the glyphos in different proportions are compounded, is obviously superior to the prevention effect of each single agent, and can effectively solve the problems of weeds and the like in non-cultivated land by mixing and combining two effective active ingredients.

In conclusion, the weeding composition has reasonable components, better control effect than the effect of single component, long lasting period, increased weed control spectrum, reduced times of drug application, saved cost of drug application, good safety to crops, and delayed weed resistance after application, and conforms to the policy and policy guidelines of pesticide application with high efficiency, safety and high selectivity.

Claims

1. The weeding composition is characterized by comprising 0.1-90 parts by weight of saflufenacil and 1-100 parts by weight of glyphosine.

2. The weeding composition according to claim 1, wherein the weeding composition comprises, by weight, 0.1-70 parts of saflufenacil and 5-100 parts of glyphosine.

3. A herbicidal composition according to claim 1, characterized in that the herbicidal composition consists of 1 to 10 parts by weight of saflufenacil and 20 to 70 parts by weight of glyphosine.

4. A herbicidal composition according to claim 1, characterized in that it consists of 2 parts of saflufenacil and 30 parts of glyphosine, calculated in parts by weight.

5. A herbicidal composition according to claim 1, characterized in that it consists of 1 part of saflufenacil and 30 parts of glyphosine, calculated in parts by weight.

6. A herbicide prepared from the herbicidal composition as claimed in any one of claims 1 to 5, which comprises the herbicidal composition and an agriculturally and pharmaceutically acceptable adjuvant.

7. The herbicide formulation of claim 6 further comprising one or more additional pesticidally active ingredients.

8. The herbicide formulation of claim 6, wherein the herbicide formulation is selected from the group consisting of wettable powders, water dispersible granules, suspensions, dry suspensions, soluble solutions, and oil dispersible suspensions.

9. Use of a herbicidal composition according to any one of claims 1 to 5 or a herbicide according to any one of claims 6 to 8 for combating harmful weeds in cultivated lands or non-cultivated lands.