CN105379727A - Compound weeding composition containing clodinafop-propargyl and difenzoquat and application thereof - Google Patents

Abstract

The invention discloses a compound weeding composition containing clodinafop-propargyl and difenzoquat and application thereof. The weeding composition takes clodinafop-propargyl and difenzoquat as main effective constituents, the mass ratio of clodinafop-propargyl to difenzoquat is (1-99): (1-99), and the total mass percentage composition of the clodinafop-propargyl and difenzoquat in the weeding composition is 10-80%. The weeding composition disclosed by the invention can be used for post-seedling weeding in wheat fields, and has obvious effect for preventing and removing grassy weeds in the wheat fields particularly. According to the weeding composition disclosed by the invention, under the precondition that the pesticide effect is improved compared with a single dosage, the resistance in weeds is delayed, the weeding spectrum is wide, the lasting period is long, and the weeding composition is safe for both wheat and succeeding crops.

Description

A kind of compound herbicide composition containing clodinafop-propargyl and wild swallow 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 of clodinafop-propargyl and petifloracyl, which can be applied to post-emergence weeding in wheat fields.

Background technique

Clodinafop propargyl, also known as top, chemical name: R-2-[4-(5-chloro-3-fluoro-2-oxypyridine)-phenoxy]-propiolic acid, belongs to phenoxycarboxylic acid herbicide Agent, structural formula:

Clodinafop-propargyl is an acetyl-CoA carboxylase (ACCase) inhibitor, a systemic conductive herbicide, absorbed by the leaves and leaf sheaths of the plant, conducted by the phloem, and accumulated in the germinal tissues of the plant, inhibiting the carboxylation of acetyl-CoA Enzymes stop the synthesis of fatty acids, the growth and division of cells cannot be carried out normally, the membrane system and other lipid-containing structures are destroyed, and finally lead to plant death. From the absorption of clodinafop-propargyl to the death of weeds is relatively slow, generally takes 1-3 weeks.

Wild Yanku, also known as Yemaiku and Bibendazole, chemical name: 1,2-dimethyl-3,5-diphenylpyrazole, structural formula:

Wild oat is a highly efficient, highly selective, and low-toxic agent for controlling wild oats in wheat fields. It is mainly used to control wild oats, a vicious weed in wheat and barley fields. After the medicament is applied to the leaves of wild oats, it is absorbed and transferred to the leaf core, acting on the growth point, destroying the cell division of wild oats and the division and elongation of cells in the top and internode meristems of wild oats, so that it stops growing, and finally The whole plant dies. The control effect reaches about 90%, so the effect of increasing production is remarkable. It has been proved by the field test that the production can generally be increased by 15-25% per mu.

At present, herbicides in wheat fields are limited by the safety of crops, and their herbicidal spectrum is also limited. Using a single herbicide alone cannot completely and effectively control the occurrence of weeds in wheat 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.

Contents of the invention

The object of the present invention is to provide a herbicidal composition containing clodinafop-propargyl and petiflorin.

Another object of the present invention is to provide the application of the herbicidal composition in weeding wheat fields.

A compound herbicidal composition containing clodinafop-propargyl and verniquat, the herbicidal composition uses clodinafop-propargyl and verniquat as main active ingredients, wherein the weight ratio of clodinafop-propargyl to verniquat is 1-99:1-99 ; Preferably, the weight ratio of clodinafop-propargyl to petiflorin in the herbicidal composition is 1-80: 1-80; more preferably, the weight ratio of clodinafop-propargyl to petiflorin in the herbicidal composition is 1-60: 1-60; Most preferably, the weight ratio of clodinafop-propargyl to phrenquat in the herbicidal composition is 29-60:1-5.

The compound herbicidal composition containing clodinafop-aparyl and petiflorin described in the technical solution of the present invention, wherein the mass percentage of clodinafop-propargyl and petiflorin in the herbicidal composition is 1-80%; The mass percent content of Yanku and Yanku in the herbicidal composition is 30-65%.

In the binary compound composition of clodinafop-propargyl and verniquat of the present invention, in addition to active ingredients such as clodinafop-propargyl and verniquat, conventional surfactants, thickeners, solvents or solids allowed in pesticide preparations can also be added Additives such as fillers are formulated into any dosage form allowed on pesticides. It is preferably processed into any one of emulsifiable concentrate, suspension concentrate, water emulsion, microemulsion, water dispersible granule and wettable powder.

The aforementioned herbicidal adjuvants applicable to the present invention are not particularly limited, including but not limited to alkylphenol polyoxyethylene ether, phenethylphenol polyoxyethylene ether, magnesium aluminum silicate, xylene, methyl naphthalene sulfonate Sodium acid formaldehyde condensate, nonylphenol polyoxyethylene ether, magnesium aluminum silicate, ethylene glycol, tributyl phosphate, silicone oil, sodium methylene dinaphthalene sulfonate, ammonium sulfate, polyvinyl alcohol, kaolin, solvent oil and water etc.

The herbicidal composition of the invention can be used in post-emergence weeding in wheat fields, especially in the control of gramineous weeds in wheat fields, and has a remarkable effect.

The herbicidal composition of the present invention has the following advantages:

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. Verticillium has a good control effect on wild oats in wheat fields, and clodinafop-propargyl can control most gramineous weeds. After the two are mixed, the control of various grass weeds can be improved.

3. High security. Because the dosage is controlled, the safety of the medicament to wheat and subsequent crops is also improved under the premise of improving the efficacy of the medicament.

The herbicidal composition of the present invention is applied to post-emergence weeding in wheat fields, can prevent and control gramineous weeds in wheat fields, and has safety for wheat and subsequent crops under the premise of improving the efficacy.

Therefore, the herbicidal composition of the present invention can be used in the preparation of herbicides for post-emergence weeding in wheat fields, especially in the preparation of herbicides for controlling gramineous weeds in wheat fields.

detailed description

The present invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this:

Example 1

Weigh 34g of clodinafop-propargyl, 1g of wild velvet, 4g of alkylphenol polyoxyethylene ether, 15g of phenethylphenol polyoxyethylene ether, and xylene to 100g, and prepare a mass percentage of 35% according to a conventional preparation method of cream.

Example 2

Weigh 29g of clodinafop-propargyl, 1g of wild velvet, 6g of sodium methylnaphthalenesulfonate formaldehyde condensate, 3g of nonylphenol polyoxyethylene ether, 0.5g of magnesium aluminum silicate, 7g of ethylene glycol, and 2g of tributyl phosphate, Silicone oil 0.2g, the balance being water, is formulated into a suspension concentrate with a mass percent content of 30% according to a conventional preparation method.

Example 3

Take by weighing clodinafop-propargyl 59g, 1g of phylloxetine, 5g of NNO (sodium methylene dicarbaline sulfonate), 3g of ammonium sulfate, 2g of polyvinyl alcohol, and 100g of kaolin, and prepare a mass percentage content of 60% water dispersible granules.

Example 4

Weigh 60 g of clodinafop-propargyl, 5 g of phloxetin, 6 g of NNO (sodium methylene disulfone sulfonate), 4 g of sodium lignosulfonate, and 100 g of kaolin, and prepare a mass percentage of 65% according to a conventional preparation method. wettable powder.

Example 5

Weigh 3 g of clodinafop-propargyl, 12 g of phloxetin, 6 g of sodium methylnaphthalene sulfonate formaldehyde condensate, 3 g of nonylphenol polyoxyethylene ether, 0.5 g of magnesium aluminum silicate, 7 g of ethylene glycol, and 2 g of tributyl phosphate, Solvent oil 20g, water up to 100g, according to the conventional preparation method, is prepared into a water emulsion with a mass percent content of 15%.

Example 6

Weigh 5g of clodinafop-propargyl, 9g of wild velvet, 6g of sodium methylnaphthalenesulfonate formaldehyde condensate, 3g of nonylphenol polyoxyethylene ether, 0.5g of magnesium aluminum silicate, 7g of ethylene glycol, and 2g of tributyl phosphate, Water to 100g, according to the conventional preparation method, is prepared into a microemulsion with a mass percent content of 14%.

Example 7

Weigh 10 g of clodinafop-propargyl, 50 g of phloxetin, 6 g of NNO (sodium methylene dicarbaline sulfonate), 4 g of sodium lignosulfonate, and 100 g of kaolin, and prepare a mass percentage of 60% according to a conventional preparation method. wettable powder.

Example 8

Weigh 20g of clodinafop-propargyl, 31g of wild velvet, 6g of sodium methylnaphthalenesulfonate formaldehyde condensate, 3g of nonylphenol polyoxyethylene ether, 0.5g of magnesium aluminum silicate, 7g of ethylene glycol, and 2g of tributyl phosphate, Silicone oil 0.2g, the balance being water, was formulated into a suspension concentrate with a mass percent content of 51% according to a conventional preparation method.

Example 9

Take by weighing 19g of clodinafop-propargyl, 60g of fenacryl, 5g of NNO (sodium methylene dicarbaline sulfonate), 3g of ammonium sulfate, 2g of polyvinyl alcohol, and 100g of kaolin, and prepare the mass percentage composition according to the conventional preparation method of 79% water dispersible granules.

Example 10

Weigh clodinafop-propargyl 5g, pheasantil 5g, NNO (sodium methylene dicarbaline sulfonate) 6g, sodium lignosulfonate 4g, and kaolin to 100g, and prepare it according to a conventional preparation method with a mass percentage of 10 % wettable powder.

1), indoor activity determination test

Using the preparations in Examples 1-4, their co-toxicity coefficients to wild oats, a common weed in wheat fields, were determined.

Test method: Quantitative wild oat seeds were sown in disposable paper cups with a height of 9 cm, 12 seeds were sown in each cup, and cultivated in a light incubator. spray treatment. 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, 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 Indoor activity measurement results

It can be seen from the above table that the co-toxicity coefficients of the two effective substances after compounding are all greater than 120, indicating that the present invention has obvious synergistic effect.

2), field efficacy test.

Drugs for testing:

4 kinds of binary compound herbicides in Examples 1-4.

Comparative drug:

15% clodinafop-propargyl wettable powder (commercially available), 65% wild alfalfa wettable powder (commercially available).

Tested crops: wheat

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

Prevention object:

Bluegrass, Bermudagrass, Chenopodium, Amaranth, Polygonum rubrum and other weeds.

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.

Embodiment of the present invention preparation weeding test effect sees following table 2 (20d after medicine) and table 3 (40d after medicine)

Table 2 field efficacy test results (20d after the medicine)

Table 3 field efficacy test results (40d after the medicine)

It can be seen from the above table that the herbicidal composition of the present invention has the functions of expanding the herbicidal spectrum, improving the herbicidal activity, and prolonging the persistence period of the medicament.

Table 4 The results of the investigation of the safety of pesticides on crops

The wheat in each treatment plot was growing well without any drug spot, which indicated that all kinds of pesticides were safe to wheat.

Claims (10)

1. containing a compound weeding composition for clodinafop-propargyl and difenzoquat, it is characterized in that: this Herbicidal combinations is with clodinafop-propargyl and difenzoquat for principle active component, and wherein, the weight ratio of clodinafop-propargyl and difenzoquat is 1 ~ 99:1 ~ 99.

2. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 1, is characterized in that: in this Herbicidal combinations, the weight ratio of clodinafop-propargyl and difenzoquat is 1 ~ 80:1 ~ 80.

3. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 2, is characterized in that: in this Herbicidal combinations, the weight ratio of clodinafop-propargyl and difenzoquat is 1 ~ 60:1 ~ 60.

4. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 3, is characterized in that: in this Herbicidal combinations, the weight ratio of clodinafop-propargyl and difenzoquat is 29 ~ 60:1 ~ 5.

5. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to any one of claim 1-4, is characterized in that: both clodinafop-propargyl and the difenzoquat mass percentage in Herbicidal combinations is 1 ~ 80%.

6. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 5, is characterized in that: both clodinafop-propargyl and the difenzoquat mass percentage in Herbicidal combinations is 30 ~ 65%.

7. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 1, is characterized in that: this compound weeding composition with clodinafop-propargyl and difenzoquat for the auxiliary agent that principle active component and agricultural chemicals allow is mixed with any one formulation.

8. the compound weeding composition containing clodinafop-propargyl and difenzoquat according to claim 7, is characterized in that: described formulation be missible oil, suspending agent, aqueous emulsion, microemulsion, water dispersion granule or and wetting powder in any one.

9. the application of Herbicidal combinations according to claim 1 in the weed killer herbicide for the preparation of wheat paddock postemergence weed control.

10. Herbicidal combinations according to claim 1 is for the preparation of the application of preventing and kill off in the weed killer herbicide of grassy weed in wheat paddock.