CN106922715A - A kind of Herbicidal combinations of Sulfometuron Methyl containing promazine with ethobenzanid and its application - Google Patents

Abstract

The invention discloses a herbicidal composition containing rimsulfuron-methyl and ethoxyfen, the herbicidal composition uses rimsulfuron-methyl and ethoxyfen as main active ingredients, The mass ratio of promethazone-methyl is 1:60-60:1. The invention also discloses the application of the herbicidal composition in post-emergence weeding in paddy fields, especially the application in controlling gramineous and broad-leaved weeds in paddy fields. The herbicidal composition of the present invention is used for post-emergence weeding in paddy fields, especially for controlling gramineous and broad-leaved weeds in paddy fields. It has a wide spectrum, a long duration of effect, and is safe for rice and subsequent crops.

Description

A herbicidal composition containing promasulfuron-methyl and ethoxyfen and its application

technical field

The invention belongs to the technical field of pesticides, in particular to the field of herbicides, and in particular relates to a binary compound herbicidal composition containing promasulfuron-methyl and ethoxyfen, which can be used for post-emergence weeding in paddy fields.

Background technique

Propyrisulfuron is a selective broad-spectrum herbicide, which has a good control effect on weeds resistant to sulfonylurea herbicides, and is effective on older barnyardgrass, sedge, and broad-leaved grass. Can be foliar spray, shake application.

Ethoxyfen, chemical name: 2',3'-dichloro-N-(4-ethoxymethoxybenzoyl)anilide, structural formula:

Ethoxyfen is an amide herbicide, which is mainly used for pre-emergence or post-emergence weeding in rice fields.

At present, herbicides in paddy fields are limited by the safety of crops, and the herbicidal spectrum is also limited. Using a single herbicide alone cannot completely and effectively control the occurrence of weeds in paddy fields. If the effective period is too long, the dosage is too large or the application is uneven, it will easily cause residual toxicity to the crops of the current season or the subsequent crops. The inventors have found through research that synergistic compounding of herbicides is an effective measure to expand the control spectrum of weeds and improve the control effect. Up to now, no herbicidal composition compounded with promasulfuron-methyl and ethoxyfen has been found.

Contents of the invention

The object of the present invention is to provide a herbicidal composition containing promasulfuron-methyl and ethoxyfen.

Another object of the present invention is to provide the application of the herbicidal composition in paddy field weeding.

The object of the present invention is achieved through the following technical solutions:

A herbicidal composition containing promasulfuron-methyl and ethopetazine, the herbicidal composition uses promethazone-methyl and ethopetazine as main active ingredients, wherein, ethopetazine and promethazine The mass ratio of rimsulfuron-methyl is 1:60～60:1.

In the herbicidal composition of the present invention, the mass ratio of ethoxyfen to promasulfuron-methyl is 1:30 to 50:1, more preferably 1:30 to 29:1, most preferably 1 :5～20:1.

In some preferred technical solutions: ethoxyfen and promethazone-methyl can be at 34:1, 29:1, 59:1, 12:1, 60:1, 50:1, 40:1, 20 :1, 10:1, 5:1, 1:1, 1:5, 1:10, 1:20, 1:30, 1:50, 1:60.

In the herbicidal composition of the present invention, the mass percentage of both promasulfuron-methyl and ethoxyfen in the herbicidal composition is 1%-80%, preferably 10%-65%.

The herbicidal composition of the present invention uses promasulfuron-methyl and ethoxyfen as active ingredients, and can also be prepared by adding conventional surfactants, thickeners, solvents or solid fillers allowed on pesticide formulations. Any dosage form allowed on pesticides. It is preferably processed into emulsifiable concentrate, suspension concentrate, water emulsion, microemulsion, water dispersible granule, wettable powder, etc.

The herbicidal composition of the present invention may only contain the active ingredients promasulfuron-methyl and acetofen, and use promethazone-methyl and acetofen as active ingredients for binary compounding, and may also be used in Or add other active components to the composition during preparation, and the active ingredients in the herbicidal composition are present in the composition in a synergistically effective amount.

The herbicidal composition of the present invention is applied to weeding in paddy fields, and it can prevent and control various gramineous and broad-leaved weeds in paddy fields, and has remarkable effects. sex. Therefore, another effect of the present invention is to provide the application of the herbicidal composition in post-emergence weeding in paddy fields, especially the application in controlling gramineous and broad-leaved weeds in paddy fields. The herbicidal composition of the invention is used for preparing herbicides for post-emergence weeding in paddy fields, especially for preparing herbicides for controlling gramineous and broad-leaved weeds in paddy fields. The weeds are crabgrass, barnyardgrass, green foxtail, bermudagrass, and daughter of a daughter.

The herbicidal composition of the present invention can be

Compared with prior art, the beneficial effect of the present invention:

In the present invention, two herbicides, promasulfuron-methyl and ethoxyfen, which have different herbicidal spectrums and have complementary advantages and disadvantages, are selected to be used as a mixture after appropriate reduction, so that the herbicidal spectrum is expanded and the herbicidal effect is obviously improved. , It also avoids the possibility of phytotoxicity to current crops and residual toxicity to subsequent crops. The specific performance is as follows:

1. High herbicidal activity. The herbicidal composition of the present invention can kill weeds through two different mechanisms, so that the speed of weed resistance generation is reduced, and the herbicidal activity of the herbicide is greatly improved.

2. Broad herbicide spectrum and long duration. The combination of the two can improve the control of a variety of grass weeds and broadleaf weeds.

3. Delay weed resistance. The herbicidal composition of the present invention reduces the resistance of weeds to the chemical agent and improves the control effect of the resistant weed through binary compounding, thereby prolonging the service life of the chemical agent.

4. High security. Because the dose is controlled, the safety of the medicament to rice and subsequent crops is also improved under the premise of improving the efficacy of the medicament.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific examples described here are only used to explain the present invention, and are not used to limit the present invention. Any simple improvement to the preparation method of the present invention under the concept of the present invention falls within the protection scope of the present invention.

Percentages in all formulations of the following examples are mass percentages. The processing techniques of various preparations of the composition of the present invention are prior art, and can be changed according to different situations.

One, dosage form preparation embodiment

Example 1: 35% Ethoxyfen Promethazone-methyl EC (34:1)

Ethoxyfen 34%, promethazone 1%, alkylphenol polyoxyethylene ether 4%, phenethylphenol polyoxyethylene ether 15%, xylene supplemented to 100%, prepared according to conventional preparation methods It is 35% emulsifiable concentrate by mass percentage.

Example 2: 30% Ethoxyfen Promethazone Suspension Concentrate (29:1)

Ethoxyfen 29%, Promethazone 1%, Sodium Naphthalene Sulfonate Formaldehyde Condensate 6%, Nonylphenol Polyoxyethylene Ether 3%, Magnesium Aluminum Silicate 0.5%, Ethylene Glycol 7% , 2% of tributyl phosphate, 0.2% of silicone oil, and the balance is water, which is prepared into a suspending agent with a mass percentage of 30% according to a conventional preparation method.

Example 3: 60% Ethoxyfen Promethazone-methyl Water-dispersible Granules (59:1)

Ethoxyfen 59%, promethazone 1%, NNO (sodium methylene bis-naphthalene sulfonate) 5%, ammonium sulfate 3%, polyvinyl alcohol 2%, kaolin supplemented to 100%, according to the conventional Preparation method Prepare water dispersible granules (WDG) with a mass percentage of 60%.

Example 4: 65% Ethoxyfen Promethazone-methyl WP (12:1)

Ethoxyfen 60%, promasulfuron-methyl 5%, NNO 6%, sodium lignosulfonate 4%, kaolin supplemented to 100%, according to the conventional preparation method, the mass percentage content is 65%. Wet powder (WP).

Example 5: 61% Ethoxyfen Promethazone-methyl EC (60:1)

Ethoxyfen 60%, promethazone 1%, alkylphenol polyoxyethylene ether 4%, phenethylphenol polyoxyethylene ether 15%, xylene supplemented to 100%, prepared according to conventional preparation methods It is 61% emulsifiable concentrate by mass percentage.

Example 6: 61% Ethoxyfen Promethazone-methyl EC (1:60)

Ethoxyfen 1%, promethazone 60%, alkylphenol polyoxyethylene ether 4%, phenethylphenol polyoxyethylene ether 15%, xylene supplemented to 100%, prepared according to conventional preparation methods It is 61% emulsifiable concentrate by mass percentage.

Example 7: 51% Ethoxyfen Promethazone-methyl Suspension Concentrate (50:1)

Ethoxyfen 50%, Promethazone 1%, Sodium Naphthalene Sulfonate Formaldehyde Condensate 6%, Nonylphenol Polyoxyethylene Ether 3%, Magnesium Aluminum Silicate 0.5%, Ethylene Glycol 7% , 2% of tributyl phosphate, 0.2% of silicone oil, and the balance is water, which is prepared into a suspending agent with a mass percentage of 51% according to a conventional preparation method.

Example 8: 51% Ethoxyfen Promethazone-methyl Suspension Concentrate (1:50)

Ethoxyfen 1%, promethazone 50%, sodium methylnaphthalene sulfonate formaldehyde condensate 6%, nonylphenol polyoxyethylene ether 3%, magnesium aluminum silicate 0.5%, ethylene glycol 7% , 2% of tributyl phosphate, 0.2% of silicone oil, and the balance is water, which is prepared into a suspending agent with a mass percentage of 51% according to a conventional preparation method.

Example 9: 31% Ethoxyfen Promethazone-methyl Water Dispersible Granules (1:30)

Ethoxyfen 1%, promethazone 30%, NNO 5%, ammonium sulfate 3%, polyvinyl alcohol 2%, kaolin supplemented to 100%, according to the conventional preparation method to prepare a mass percentage of 31% % of water dispersible granules.

Example 10: 41% Ethoxyfen Promethazone-methyl Water Dispersible Granules (40:1)

Ethoxyfen 40%, promethazone 1%, NNO 5%, ammonium sulfate 3%, polyvinyl alcohol 2%, kaolin supplemented to 100%, prepared according to the conventional preparation method with a mass percentage of 41% % of water dispersible granules.

Example 11: 42% Ethoxyfen Promethazone-methyl WP (20:1)

Ethoxyfen 40%, promethazone 2%, NNO 6%, sodium lignosulfonate 4%, kaolin supplemented to 100%, according to the conventional preparation method, the mass percentage content is 42%. Wet powder.

Example 12: 21% Ethoxyfen Promethazone-methyl WP (1:20)

Ethoxyfen 1%, promethazone 20%, NNO 6%, sodium lignosulfonate 4%, kaolin supplemented to 100%, according to the conventional preparation method, the mass percentage content is 21%. Wet powder.

Example 13: 33% Ethoxyfen Promethazone Emulsion in Water (1:10)

Ethoxyfen 3%, Promethazone 30%, Sodium Naphthalene Sulfonate Formaldehyde Condensate 6%, Nonylphenol Polyoxyethylene Ether 3%, Magnesium Aluminum Silicate 0.5%, Ethylene Glycol 7% , tributyl phosphate 2%, 150# solvent naphtha 20%, water supplements to 100%, is mixed with the water emulsion that mass percent composition is 33% according to routine preparation method.

Example 14: 33% Ethoxyfen Promethazone Emulsion in Water (10:1)

Ethoxyfen 30%, Promethazone 3%, Sodium Naphthalene Sulfonate Formaldehyde Condensate 6%, Nonylphenol Polyoxyethylene Ether 3%, Magnesium Aluminum Silicate 0.5%, Ethylene Glycol 7% , tributyl phosphate 2%, 150# solvent naphtha 20%, water supplements to 100%, is mixed with the water emulsion that mass percent composition is 33% according to routine preparation method.

Example 15: 30% Ethoxyfen Promethazone-methyl Microemulsion (5:1)

Ethoxyfen 25%, Promethazone 5%, Sodium Naphthalene Sulfonate Formaldehyde Condensate 6%, Nonylphenol Polyoxyethylene Ether 3%, Magnesium Aluminum Silicate 0.5%, Ethylene Glycol 7% , 2% of tributyl phosphate, supplemented with water to 100%, and prepared into a microemulsion with a mass percentage of 30% according to a conventional preparation method.

Example 16: 60% Ethoxyfen Promethazone-methyl WP (1:5)

Ethoxyfen 10%, promethazone 50%, NNO 6%, sodium lignosulfonate 4%, kaolin supplemented to 100%, prepared according to the conventional preparation method with a mass percentage of 60%. Wet powder.

Example 17: 10% Ethoxyfen Promethazone-methyl WP (1:1)

Ethoxyfen 5%, promethazone 5%, NNO 6%, sodium lignosulfonate 4%, kaolin supplemented to 100%, according to the conventional preparation method, the mass percentage content of 10% can be prepared Wet powder.

2. Drug efficacy verification test

1), indoor activity determination test

According to the mass ratio of the active ingredient ethoxyfen: promethazone-methyl: 70:1, 34:1, 29:1, 59:1, 12:1, 60:1, 50:1, 40:1 , 20:1, 10:1, 5:1, 1:1, 1:5, 1:10, 1:20, 1:30, 1:50, 1:60, 1:70 were tested to determine the Co-toxicity coefficient of barnyardgrass, a common weed in paddy fields.

Test method: sow quantitative barnyardgrass seeds in 9cm disposable paper cups, sow 10-15 seeds in each cup, and cultivate them in a light incubator. Spray treatment on crop sprayer. After the treatment, the cultivation was continued in the greenhouse, and the control effect of each treatment on weeds was regularly observed. After 30 days, the fresh weight of the weeds after each treatment was weighed, and the regression curve of toxicity and the co-toxicity coefficient were calculated. A co-toxicity coefficient greater than 120 indicates that the two effective substances have a synergistic effect, a co-toxicity coefficient between 80-120 indicates that the two effective substances have an additive effect, and a co-toxicity coefficient of less than 80 indicates that the two effective substances have an antagonistic effect . The measurement results are shown in Table 1.

Table 1 The results of indoor activity determination

It can be seen from Table 1 that the combination of ethoxyfen and promethazone-methyl at a mass ratio of 1:60-60:1 significantly improved the herbicidal effect on barnyard grass, indicating that the combination of the two had a significant increase in the control of barnyard grass. effect. When the ratio of ethoxyfen to promasulfuron-methyl is between 1:30 and 50:1, the co-toxicity coefficient of the two effective substances after compounding is better, and the co-toxicity coefficient is not less than 135; when B The ratio of oxetam to promethazone is between 1:30 and 29:1, and the co-toxicity coefficient is greater than 150; Between 29:1, the co-toxicity coefficient is greater than 160; indicating that the present invention has obvious synergistic effect.

2), field efficacy test.

Drugs for testing:

Binary compound herbicides prepared in Examples 1-17 with different ratios of promasulfuron-methyl and ethoxyfen.

Comparative drug:

9.5% promasulfuron-methyl SC (commercially available), 40% ethoxyfen water-dispersible granules (prepared by conventional methods).

Test crops: rice

The rice seedlings are growing well, the plants are robust, and there are no other diseases and insect pests.

Prevention object:

Weeds such as crabgrass, barnyardgrass, bermudagrass, foxtail, and daughter.

experiment method:

Accurately weigh various agents according to the area of the test plot, and after diluting with water, use a knapsack sprayer to spray evenly, and the nozzles are herbicide-specific fan-shaped nozzles. When spraying, pay attention to spraying the liquid medicine evenly into the test area, so that there is no leakage or overspray.

After the test, weed death was observed at 20 days and 40 days after application, and the herbicidal activities of various agents were compared. In addition, it is necessary to observe the production of crops within 1-15 days after application (the dosage is the amount of active ingredients per mu of land) to investigate whether the pesticide has phytotoxicity on the crops.

The herbicidal test effects of the preparations of the embodiments of the present invention are shown in Table 2 (after 20 d) and Table 3 (40 d) below.

Table 2 Field drug efficacy test results (20 days after drug treatment)

Table 3 Field drug efficacy test results (40 days after drug treatment)

It can be seen from Table 2 and Table 3 that the combination of promasulfuron-methyl and ethoxyfen has the effects of rapid onset of action, expansion of herbicidal spectrum and improvement of herbicidal activity, and prolongs the duration of the agent. It can effectively control broad-leaved weeds and gramineous weeds, and its control effect is better than that of a single agent, indicating that the combination of the two has a significant synergistic effect on the control of broad-leaved weeds and gramineous weeds in rice fields.

Table 4 Results of survey on the safety of pesticides on crops

The rice in each treatment plot grew well, and no drug spots were seen, indicating that various pesticides are safe to rice.

Claims (10)

1. Herbicidal combinations of a kind of Sulfometuron Methyl containing promazine and ethobenzanid, it is characterised in that the Herbicidal combinations are phonetic with promazine It is principle active component with ethobenzanid that sulphur is grand, wherein, ethobenzanid is 1 with the mass ratio of promazine Sulfometuron Methyl：60~60： 1。

2. Herbicidal combinations according to claim 1, it is characterised in that ethobenzanid and promazine in the Herbicidal combinations The mass ratio of Sulfometuron Methyl is 1：30~50：1.

3. Herbicidal combinations according to claim 2, it is characterised in that ethobenzanid and promazine in the Herbicidal combinations The mass ratio of Sulfometuron Methyl is 1：30~29：1.

4. Herbicidal combinations according to claim 3, it is characterised in that ethobenzanid and promazine in the Herbicidal combinations The mass ratio of Sulfometuron Methyl is 1：5~20：1.

5. Herbicidal combinations according to claim 1,2,3 or 4, it is characterised in that promazine Sulfometuron Methyl and ethobenzanid two Weight/mass percentage composition of the person in Herbicidal combinations is 1%~80%.

6. Herbicidal combinations according to claim 5, it is characterised in that promazine Sulfometuron Methyl is being removed with both ethobenzanids Weight/mass percentage composition in careless composition is 10%~65%.

7. Herbicidal combinations according to claim 1, it is characterised in that the Herbicidal combinations are with promazine Sulfometuron Methyl and ethoxy Benzene grass amine is that the auxiliary agent allowed on principle active component and agricultural chemicals is configured to any one formulation.

8. Herbicidal combinations according to claim 7, it is characterised in that described formulation be missible oil, suspending agent, aqueous emulsion, Microemulsion, water dispersible granules or wettable powder.

9. application of the Herbicidal combinations described in claim 1 in rice terrace postemergence weed control.

10. application according to claim 9, it is characterised in that described application is Herbicidal combinations in rice terrace is prevented and kill off Application in grass family and broad leaved weed.