CN111357750A

CN111357750A - Paddy field weeding composition and application thereof

Info

Publication number: CN111357750A
Application number: CN202010302113.2A
Authority: CN
Inventors: 张元珍; 王小涛; 于晓静; 丁丽智; 吴磊
Original assignee: Jingbo Agrochemicals Technology Co Ltd
Current assignee: Jingbo Agrochemicals Technology Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-07-03

Abstract

The invention relates to the technical field of pesticide compounding, in particular to a paddy field weeding composition and application thereof. The weeding composition has the beneficial effects that: (1) the clomazone and the triafamone are compounded to have a synergistic effect, so that the control effect on the weeds in the paddy field is obviously improved compared with the single dose used alone, and the weed control spectrum is expanded; (2) the clomazone and the triafamone are compounded, so that the use amount of pesticides is reduced, the resistance risk is reduced, the use cost is reduced, and the environment compatibility is good.

Description

Paddy field weeding composition and application thereof

Technical Field

The invention relates to the technical field of pesticide compounding, and particularly relates to a paddy field weeding composition and application thereof.

Background

Clomazone is also called clomazone, and has the chemical name of 2- (2-chlorobenzyl) -4, 4-dimethyl isoxazol-3-ketone. Is an organic heterocyclic preemergence selective herbicide and a carotenoid inhibitor. Absorbed by roots and buds of plants and conducted upwards to each part of the plants; the stem and leaf treatment only has contact killing effect and does not conduct downwards. The agents entering the plant body hinder the biosynthesis of carotene and chlorophyll, making the germinating weeds poetic and dead in a short period. Is suitable for preventing and killing annual gramineous weeds and broadleaf weeds in soybean, sugarcane, peanut, potato, tobacco, rape and paddy fields. The chemical structural formula of clomazone is as follows:

the triafamone is a novel sulfonylaniline herbicide developed by Bayer, and the herbicide is an acetolactate synthase inhibitor which inhibits cell division and plant growth by preventing biosynthesis of valine, leucine and isoleucine. The root system and the bud are mainly absorbed, and the weeding activity is absorbed by the stem leaves. The dosage is 25-50 g/hm²The herbicide is used before or after emergence for preventing and killing gramineous weeds, nutgrass flatsedge and broadleaf weeds in paddy fields.

The chemical structural formula of the triafamone is as follows:

disclosure of Invention

Aiming at the technical problem that the control effect of the existing paddy field weeding composition is not ideal, the invention provides the paddy field weeding composition which has the advantages of synergistic effect, expansion of weed control spectrum, low use cost and good control effect.

In a first aspect, the present invention provides a herbicidal composition for paddy fields, which comprises clomazone and triafamone as active ingredients.

Furthermore, the weight ratio of clomazone to triafamone in the weeding composition is 15: 1-1: 15.

Preferably, the weight ratio of clomazone to triafamone in the weeding composition is 5: 1-1: 3.

Furthermore, the weeding composition comprises clomazone and triafamone, and the balance is auxiliary components which are allowed to be used and accepted in pesticides, and the total weight of the clomazone and the triafamone accounts for 0.1-85% of the weight of the weeding composition.

Furthermore, the herbicidal composition takes clomazone and triafamone as effective components, and is prepared into different formulations with auxiliary components according to a conventional pesticide method, so that the herbicidal composition can be selected and prepared as required, has a wide application range, and meets the requirements of customers.

Further, the auxiliary ingredients include one or more of acceptable dispersing agents, wetting agents, thickening agents, disintegrating agents, binding agents, solid acids, carbonates, flow regulators, emulsifiers, solvents, antifreeze agents, antifoaming agents, film forming agents, non-aqueous media, solid carriers, and other auxiliary ingredients such as penetrating agents, synergists, and the like, which are well known to those skilled in the art.

Furthermore, the dispersing agent is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, naphthalenesulfonate formaldehyde condensate, p-methoxy fatty amido benzenesulfonic acid, lignosulfonate, polycarboxylate, alkylphenol polyoxyethylene ether sulfate, calcium alkylbenzene sulfonate, fatty acid ester sulfate, alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.

Furthermore, the wetting agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium butyl naphthalene sulfonate, sodium alkyl sulfonate, tea seed powder, Chinese honeylocust fruit powder and soapberry powder.

Furthermore, the thickening agent is one or more of polyvinyl acetate, xanthan gum, gelatin, gum arabic, magnesium aluminum silicate, phenolic resin, hydroxymethyl cellulose and sodium alginate.

Furthermore, the disintegrating agent is one or more of sodium carboxymethyl starch, low-substituted hydroxypropyl cellulose, croscarmellose sodium, crospovidone, chitosan, sodium alginate sodium bicarbonate, magnesium chloride, aluminum chloride, sodium chloride, urea, ammonium sulfate and bentonite.

Furthermore, the adhesive is one or more of sucrose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, carboxypropyl cellulose, dextrin, starch dextrin, polyvinylpyrrolidone, adhesive kaolin, paraffin and rosin.

Furthermore, the solid acid is one or more of citric acid, succinic acid, maleic acid, fumaric acid, tartaric acid, oxalic acid, malonic acid, malic acid, succinic acid, adipic acid, boric acid, phosphoric acid, benzoic acid, sulfamic acid, salicylic acid, glutamic acid, phenylacetic acid, nicotinic acid or sorbic acid.

Furthermore, the carbonate is one or more of sodium carbonate, potassium carbonate, ammonium carbonate, calcium carbonate, lithium carbonate, sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, sodium sesquicarbonate, tripotassium bicarbonate or triammonium bicarbonate.

Furthermore, the flow regulator is one or more of calcium stearate, magnesium stearate, barium stearate, titanium dioxide, talcum powder, magnesium lauryl sulfate, polysorbate, wheat starch or sodium benzoate.

Furthermore, the emulsifier is one or more of alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, benzyl phenol polyoxyethylene ether, polyoxyethylene fatty acid ester, polyoxyethylene fatty alcohol ether, polyoxyethylene fatty amine, alkylphenol polyglycol ether, span series (sorbitan monostearate), tween series (sorbitan fatty acid ester polyoxyethylene ether), AEO series (fatty alcohol polyoxyethylene ether), OP series phosphate (nonylphenol polyoxyethylene ether phosphate), OP series (nonylphenol polyoxyethylene ether) and By series (castor oil polyoxyethylene ether).

Furthermore, the solvent is one or more of methanol, ethanol, butanol, propylene glycol, glycerol, polyethylene glycol, cyclohexanone, pyrrolidone, machine oil, solvent oil, trimethylbenzene, xylene, dimethylformamide, nitrogen methyl pyrrolidone, coconut fatty acid methyl ester, methyl oleate, methyl esterified vegetable oil, ethyl acetate, dimethyl phthalate and dibutyl phthalate.

Furthermore, the antifreezing agent is one or more of glycerol, propylene glycol, diethylene glycol and urea.

Furthermore, the defoaming agent is one or more of silicone compounds, epoxidized soybean oil, methanol and silicone oil.

Furthermore, the film forming agent is one or more of dodecyl alcohol ester, methyl laurate, octadecanol, propylene glycol phenyl ether and butyl ether acetate.

Furthermore, the non-aqueous medium is one or more of refined soybean oil, corn oil, rapeseed oil, turpentine, methyl oleate, coconut oil, palm oil and ethyl acetate.

Furthermore, the solid carrier is one or more of light calcium carbonate, argil, kaolin, diatomite, bentonite, white carbon black, clay, attapulgite, talcum powder and quartz sand.

In a second aspect, the present invention provides the use of the above herbicidal composition for controlling annual weeds in paddy fields.

Furthermore, the annual weeds are barnyard grass, monochoria vaginalis and cyperus rotundus.

The beneficial effect of the invention is that,

(1) the clomazone and the triafamone are compounded to have a synergistic effect, so that the control effect on the weeds in the paddy field is obviously improved compared with the single dose used alone, and the weed control spectrum is expanded;

(2) the clomazone and the triafamone are compounded, so that the use amount of pesticides is reduced, the resistance risk is reduced, the use cost is reduced, and the environment compatibility is good.

In addition, the application frequency and application amount of the composition of the invention are slightly changed along with the change of crops, weeds and weather conditions, and the purpose of effective control can be achieved by using proper dosage.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Firstly, screening the formula of the composition by indoor toxicity measurement, and then carrying out corresponding field efficacy test verification.

Test example 1 indoor toxicity test

Separately taking clomazone single agent, triafamone single agent and suspending agent containing clomazone and triafamone as test agents to test the toxicity of the agents to barnyard grass, monochoria vaginalis and cyperus rotundus.

TABLE 1 indoor toxicity assay for clomazone and triafamone and its combination for barnyard grass

As can be seen from table 1: when clomazone and triafamone are compounded in a range of 15: 1-1: 15, the co-toxicity coefficient CTC is more than 120, and the indoor toxicity of the cloaca is shown to be synergistic according to the Sunpiping method, wherein the CTC is more than 160 when the ratio is 5:1, 1:1 and 1:3, the composition shows remarkable synergistic effect on the cloaca under the conditions of the ratios, and the synergistic effect is most remarkable when the ratio is 1: 1.

TABLE 2 indoor toxicity assay for Ottelia alismoides and Fluoroketofonamide and its combination

As can be seen from table 2: when the clomazone and the triafamone are compounded within the range of 10: 1-1: 5, the co-toxicity coefficients are both more than 120, namely the indoor toxicity of the monochoria vaginalis is shown to be synergistic; when the ratio reaches 5:1, 1:1 and 1:3, the CTC is more than 160, and the obvious synergistic effect is shown, wherein the synergistic effect is most obvious under the condition of the ratio of 5: 1.

TABLE 3 indoor toxicity assay for clomazone and triafamone and its combination on Cyperus rotundus

As can be seen from table 3: when the clomazone and the triafamone are compounded within the range of 15: 1-1: 15, the composition has a remarkable synergistic effect on indoor toxicity of the cyperus rotundus. Wherein, when the ratio is 10: 1-1: 5, the CTC is more than 170, and the synergistic effect is most obvious under the condition of the ratio of 5: 1.

Example 1: 65% clomazone-fluoxastrobin-flutolanil water dispersion granule

40% of clomazone, 25% of triafamone, 5% of sodium dodecyl sulfate, 8% of p-methoxy fatty amido benzenesulfonic acid, 2% of ammonium sulfate and the balance of kaolin to 100%;

the effective components and the auxiliary components are uniformly mixed, crushed by an ultramicro jet mill, kneaded, added into a fluidized bed granulation dryer for granulation, drying and screening, and the 65% clomazone-fluoxasulforamine water dispersible granule is prepared.

The 65% clomazone-flutriafol water dispersible granule has higher safety on rice when sprayed on stem leaves and leaves of rice, and the control efficiency of the combined mode on the monochoria vaginalis is relatively better than that of barnyard grass and cyperus rotundus from the analysis of fresh weight control rate of plants, the control efficiency of the monochoria vaginalis is 90.4% after the pesticide is applied for 15 days, the control efficiency of the monochoria vaginalis is 86.1% and 88.5% respectively for the barnyard grass and the cyperus rotundus, the control efficiency of the monochoria vaginalis is 92.9% after the pesticide is applied for 30 days, the cocknyard grass is.

Example 2: 70% clomazone-flutriafol wettable powder

40% of clomazone, 30% of triafamone, 6% of butyl sodium naphthalene sulfonate, 8% of fatty acid ester sulfate and the balance of diatomite to 100%;

the effective components and the auxiliary components are mixed, mechanically crushed, airflow crushed and mixed evenly to prepare the 70 percent clomazone-flutriafol wettable powder.

The 70% clomazone-flutriafol wettable powder is safe to rice by spraying stem leaves on the rice, the best control effect on the monochoria vaginalis is continuously observed after the pesticide is applied, the fresh and heavy control rate of the monochoria vaginalis is 95.8% at the 15 th day, the fresh and heavy control rate of the barnyard grass is 92.6%, the control rate of the cyperus rotundus is 88.4%, all the monochoria vaginalis dies at the 30 th day, the control rate is 99.8%, the control rate of the barnyard grass is 97.9%, and the control rate of the cyperus rotundus is 93.6%.

Example 3: 20% clomazone-fluocinonide oil suspending agent

Clomazone 12%, triafamone 8%, polycarboxylate 10%, sodium dodecyl benzene sulfonate 10%, sodium alginate 1.5%, and methyl oleate complement to 100%;

the effective components and the auxiliary components except the methyl oleate are subjected to high-speed shearing dispersion and sanding in a sanding machine to form a high-dispersion stable suspension system in the methyl oleate, so that the 20% clomazone-fluoroketosulam oil suspending agent can be prepared.

The 20% clomazone-fluazuron oil suspending agent is safe to rice by spraying stem leaves on rice, has relatively good effect of preventing and controlling barnyard grass, has the fresh weight prevention and control rate of 91.7% for the barnyard grass 15 days after application, and is 88.7% and 83.2% for the monochoria vaginalis and cyperus rotundus respectively; the fresh weight prevention and control rates of the three weeds are slightly increased by 30 days after the application of the herbicide, and are respectively 92.8%, 91.2% and 86.3%.

Example 4: 1% clomazone-fluoxasulforamine granules

0.7% of clomazone, 0.3% of triafamone, 10% of butyl sodium naphthalene sulfonate, 10% of lignosulfonate, 20% of polyvinyl alcohol and the balance of clay to 100%;

mixing the effective components and the auxiliary components, adding water, kneading, forming by a kneading granulator, drying the granules by a fluidized bed, and sieving to obtain 1% clomazone-fluocinosulfuron granules.

The 1% clomazone-flutriafol granules are safe to rice by spraying stem leaves on rice, the control efficiency of the granules to barnyard grass, monochoria vaginalis and cyperus rotundus is slightly low, the control efficiency of three weeds 15 days after the granules are respectively 85.9%, 81.7% and 78.2%, and the control efficiency of weeds 30 days after the granules are basically not obviously changed and respectively 86.6%, 87.0% and 79.4%.

Example 5: 35% clomazone-fluoxasulforamine effervescent tablet

20% of clomazone, 15% of triafamone, 5% of sodium dodecyl sulfate, 5% of fatty alcohol-polyoxyethylene ether, 15% of tartaric acid, 15% of potassium bicarbonate, 2% of dextrin, 5% of magnesium stearate and the balance of kaolin to 100%;

the preparation method comprises the following steps of fully and uniformly mixing the active ingredients and other auxiliary ingredients (except a binder), crushing to 0.3-5 mu m by using a low-temperature ultrafine pulverizer, adding the binder which is prepared into paste by using water, uniformly stirring, tabletting by using a tabletting machine, and finally drying, grading, detecting, sealing and packaging to obtain the 35% clomazone-flutriafol effervescent tablet.

The 35% clomazone-fluoxasulforamine effervescent tablet is safe to rice by spraying stem leaves on rice, has the control efficiency of 90.1% on the fresh weight of barnyard grass, is slightly higher than that of monochoria vaginalis and cyperus rotundus, has the control efficiency of 86.3% and 83.7% respectively, and has the control efficiency of the fresh weight of three weeds of 93.0%, 88.8% and 86.1% respectively 30 days after application.

Example 6: 36% clomazone-fluoxastrobin water emulsion

30% of clomazone, 6% of triafamone, 20% of castor oil polyoxyethylene ether, 10% of cyclohexanone, 2% of propylene glycol, 0.5% of silicone oil, 0.2% of xanthan gum and deionized water for supplementing to 100%.

Firstly, mixing the active ingredients, the solvent and the emulsifier together, and dissolving the mixture into a uniform oil phase; mixing part of deionized water and other auxiliary components together, and dissolving to obtain a uniform water phase; then adding the water phase into the oil phase while stirring at high speed in the reaction kettle, slowly adding deionized water until reaching a phase inversion point, then carrying out high-speed shearing, adding the rest deionized water, and shearing for about 30min to obtain the 36% clomazone-flutriafol water emulsion.

The 36% clomazone-flutriafol water emulsion has the highest safety on rice when sprayed on stem leaves and leaves of rice, the prevention and control efficiency on barnyard grass, monochoria vaginalis and cyperus rotundus is relatively best when the fresh weight prevention and control rate of the plants is investigated, the fresh weight prevention and control rates of the barnyard grass, the monochoria vaginalis and the cyperus rotundus are respectively 95.4%, 95.4% and 91.7% 15 days after the application, most of the three types of grasses die 30 days after the application, and the prevention and control rates are respectively 98.8%, 98.6% and 96.3%.

Example 7: 10% clomazone-fluocinonide film-spreading oil agent

5% of clomazone, 5% of triafamone, 5% of cyclohexanone, 10% of dodecyl alcohol ester, 5% of alkylphenol polyoxyethylene, and the balance of ethyl acetate to 100%. After the active ingredients are fully dissolved by using a solvent cyclohexanone, adding alkylphenol ethoxylates, finally adding a film-forming agent dodecyl alcohol ester and a non-aqueous medium ethyl acetate for complement, fully stirring and uniformly mixing until the mixture is transparent, and thus obtaining the 10% clomazone-fluoxyfen film-spreading oil agent.

The 10% clomazone-flutriafol-fluroxypyr spreading oil agent is sprayed on the stem leaves of rice, the safety of the rice is higher, the control efficiency of barnyard grass, monochoria vaginalis and cyperus rotundus is more than 92%, the control efficiency of the barnyard grass is as high as 95.5%, the control efficiency of the monochoria vaginalis and cyperus rotundus is respectively 94.1% and 92.7%, the weeds are further killed 30 days after the application, and the fresh weight control rate of the three weeds is respectively 97.6%, 95.6% and 94.8%.

Test example 2 field efficacy test

The single preparation of clomazone, triafamone and the compound preparation prepared in the above examples 1-7 are adopted to carry out a pesticide effect verification test in a paddy field, after spraying, the pesticide effect comparison condition of each treatment on different grass phases is observed, and the control effect of the product on different grass phases is determined according to statistics of leaf color, root system comparison, mortality and the like before and after treatment. The control effect of each medicament on weeds is detailed in a table 4.

Table 4 table of field efficacy verification test results

Therefore, according to the indoor biological assay and field efficacy verification test of the composition of clomazone and triafamone on barnyard grass, monochoria vaginalis and cyperus rotundus, the obtained cloaca vaginalis, monochoria vaginalis and cyperus rotundus have different proportions to enhance the effect on barnyard grass, monochoria vaginalis and cyperus rotundus under different formulations, have high safety on rice, and are novel weeding compositions for preventing and killing annual weeds in paddy fields. The dosage of the medicament according to the present embodiment is a dosage for one acre of land.

Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A weeding composition for paddy fields is characterized in that clomazone and triafamone are taken as effective components of the weeding composition.

2. A herbicidal composition for paddy field according to claim 1, wherein the weight ratio of clomazone and triafamone in the herbicidal composition is 15:1 to 1: 15.

3. A herbicidal composition for paddy field according to claim 2, wherein the weight ratio of clomazone and triafamone in the herbicidal composition is 5:1 to 1: 3.

4. A herbicidal composition for paddy fields according to claim 1, wherein said herbicidal composition comprises clomazone and triafamone, and the balance is auxiliary components acceptable and allowable for agricultural use, and the total weight of clomazone and triafamone is 0.1-85% of the weight of the herbicidal composition.

5. A herbicidal composition for paddy field according to claim 1, wherein said herbicidal composition comprises clomazone and triafamone as active ingredients, and is formulated into different formulations with the adjuvant ingredients according to conventional pesticide methods.

6. A herbicidal composition for paddy field according to claim 5, wherein said formulation comprises oil-suspendable agent, granule, wettable powder, water dispersible granule, effervescent tablet, aqueous emulsion and film-spreading oil agent.

7. A herbicidal composition according to claim 5, wherein said adjuvants comprise one or more acceptable dispersants, wetting agents, thickeners, disintegrants, binders, solid acids, carbonates, flow control agents, emulsifiers, solvents, antifreezes, antifoaming agents, film formers, non-aqueous media, solid carriers, penetrants, synergists.

8. Use of the herbicidal composition for paddy field according to claim 1 for controlling annual weeds in paddy field.

9. Use of the herbicidal composition for paddy field as claimed in claim 8 for controlling barnyard grass, monochoria vaginalis and sedge.