WO2022227315A1 - Sarmentine-containing compound herbicidal composition and application thereof - Google Patents

Abstract

Disclosed are a sarmentine-containing compound herbicidal composition and an application thereof. The composition comprises sarmentine and clomeprop at a weight ratio of (1:2) to (8:1); sarmentine is a plant-derived herbicide, has low toxicity, and is environmentally friendly, and sarmentine and clomeprop have a synergistic effect when compounded; upon compounding, the two together remedy shortcomings of poor prevention and control effects of clomeprop on a Poaceae family weed and sarmentine on a Cyperaceae family weed, delay weed resistance, have high weed prevention effectiveness, and have a broad herbicidal spectrum; and when sarmentine and clomeprop are compounded and used, an herbicidal effect is stronger than solely using either sarmentine or clomeprop, a usage amount of an herbicide is reduced, and consequently an adverse effect of a pesticide on the environment is reduced.

Description

A kind of compound herbicidal composition containing pseudokontinine and application thereof technical field

The invention belongs to the technical field of pesticides, and in particular relates to a compound herbicidal composition containing pseudokontinine and its application.

Background technique

Weeds compete with crops for nutrients, water and light affecting crop production and, if not controlled, can lead to reduced crop yields. At present, agricultural weed control usually adopts chemical control. Chemical herbicide control has become the most reliable and cheapest way to control weeds in crop production. However, the unreasonable and large use of a single chemical herbicide for a long time has led to an increase in the level of weed resistance and the increasing dosage of herbicides. large, and adversely affect the environment and soil.

Pseudokontinine is an environmentally friendly, broad-spectrum, contact herbicide that interferes with photosynthesis by competing for the binding site of plastoquinone, inhibiting photosystem II (PSII), and inhibiting enoyl-ACP reductase. (ENR) activity to interfere with fatty acid synthesis, resulting in loss of plant membrane integrity and ultimately plant death. Pseudokontinine can control annual or perennial dicotyledonous and grass weeds, but it has poor control effect on Cyperaceae drug-resistant weeds such as Cyperus aconite. Patent CN105072901A herbicidal composition and method of use provide a method for selectively controlling or altering the growth of bluegrass in cool-season turfgrass without causing significant damage to the turfgrass using a composition comprising pseudokontinine and/or its analogs. method of injury. It controls the Poaceae weed Poa annua, and has not disclosed the control effect on Cyperaceae weeds.

At present, there are few related studies on the compound composition of pseudokontinine, and there is no relevant report on the combination of pseudokontinine and other drugs to control the drug-resistant weeds of Cyperaceae.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, in order to solve the above problems, the purpose of the present invention is to provide a compound herbicidal composition containing pseudokontinine and its application.

The scheme of the present invention includes the following contents:

A compound herbicidal composition containing pseudokontinine comprises pseudokontinine and chloroformil in a weight ratio of 1:2 to 8:1.

Preferably, the weight ratio of the pseudokontinine to chloroformamide is 8:1 to 8:4, and this ratio is the best for the control effect of Cyperus officinalis.

Preferably, the weight ratio of the pseudokontinine to chloroformamide is 1:1, and this ratio is the best for the control effect of barnyardgrass.

The present invention also provides a herbicide containing the compound herbicidal composition, wherein the total mass content of pseudokontinine and chloramphenicol in the herbicide is 10-80%.

The herbicides described in the present invention can be made into a variety of common pesticide formulations, such as water dispersible granules, wettable powders, and suspending agents, by conventional methods with adjuvants.

Preferably, the formulation of the herbicide is water-dispersible granules, and the water-dispersible granules include the following components by weight: 8-75% of pseudokontinine, 3-15% of chlorfenapyr, wetting agent 2-3%, dispersant 3-7%, disintegrant 5-6%, binder 0-1%, defoamer 0.2-0.5%, and the balance is carrier.

Preferably, the formulation of the herbicide is a wettable powder, and the wettable powder includes the following components by weight: 8-50% of pseudokontinine, 1-24% of chloroform, and 2-24% of wetting agent. 3%, dispersant 6-8%, defoamer 0.2-0.8%, the balance is carrier;

Preferably, the formulation of the herbicide is an aqueous suspension, and the aqueous suspension includes the following components by weight: 10-15% of pseudokontinine, 2-5% of chloroformil, and 2% of wetting agent. , 5 to 7% of dispersant, 5% of antifreeze, 0.4 to 0.5% of thickener, 0.5% of preservative, 0.2 to 0.5% of defoamer, and the balance is water.

Preferably, the formulation oil suspension agent of the herbicide, the oil suspension agent comprises the following components by weight: 5-33% of pseudokontinine, 5-11% of chlorfenapyr, 0-8% of emulsifier , 2-8% of wetting agent, 2-7% of dispersant, 2-4% of stabilizer, 0.2-0.5% of defoamer, and the balance is solvent.

Described emulsifier includes but is not limited to EO-PO block copolymer, dodecylbenzene sulfonate, nonylphenol polyoxyethylene ether phosphate sodium salt, Tween series, Span series, castor oil phosphate Series, Nongru No. 600, Nongru No. 700, Nonylphenol Polyoxyethylene Sulfate Triethanolammonium Salt, Alkylphenol Polyoxyethylene Ether APEO, Nonylphenol Polyoxyethylene Ether Phosphate, Nonylphenol Polyoxyethylene One or more of ethers;

Described wetting agent includes but is not limited to sodium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium petroleum sulfonate, mixed alcohol polyoxyethylene ether, saponin powder, fatty alcohol sulfate, silkworm sand, low viscosity One or more of methyl cellulose, pull open powder, alkyl sulfate, GY-W04 (Beijing Guangyuan Yinong Chemical Co., Ltd.);

The dispersants include but are not limited to naphthalenesulfonic acid formaldehyde condensate, lignosulfonate, sodium methylenebisnaphthalenesulfonate, octylphenol polyoxyethylene ether sulfate, alkylphenol polyoxyethylene ether, Fatty amine polyoxyethylene ether, arylphenol polyoxyethylene succinate sulfonate, alkylnaphthalene sulfonate, alkylbenzene sulfonate, polycarboxylate, alkenyl sulfonate, fatty acid polyoxyethylene Ether, alkyl aryl polyoxyethylene ether, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, GY-D10 (Beijing Guangyuan Yinong Chemical Co., Ltd.), GY-D800 ( One or more of Beijing Guangyuan Yinong Chemical Co., Ltd.);

Described binder includes but not limited to one or more in polyvinyl alcohol, methyl cellulose, vinyl pyrrolidone, sucrose, starch or soluble starch;

Described disintegrant includes but is not limited to one or more in sodium carbonate, sodium bicarbonate, ammonium sulfate, sodium carboxymethyl cellulose, glucose, urea or aluminum chloride;

The defoamer includes but is not limited to one of polyethers, polysiloxanes, silicones, silicone defoamers, higher alcohols, capric acid, silicone oil, and tributyl phosphate. several;

The carrier includes, but is not limited to, one or more of bentonite, diatomaceous earth, light calcium carbonate, kaolin, attapulgite or silica.

The preservatives include, but are not limited to, one or more of sodium benzoate, potassium sorbate, and isothiazolinones.

The antifreeze agent includes but is not limited to one or more of glycerol, ethylene glycol, propylene glycol, polyethylene glycol, and isopropanol.

The thickeners include but are not limited to xanthan gum, aluminum magnesium silicate, modified bentonite, alginate, carboxymethyl cellulose, hydroxypropyl cellulose, sodium polyacrylate, polyacrylic acid amine or polyvinylpyrrolidone one or more of them.

The stabilizer includes, but is not limited to, one or more of organic acids, organic bases, esters, alcohols, organic bentonite, tall oil, attapulgite, silica, epichlorohydrin or urea.

The solvent includes, but is not limited to, one or more of methyl oleate, soybean oil, corn oil, tea oil, rapeseed oil, vegetable oil esters or mineral oil.

On the other hand, the present invention also provides the application of the herbicidal composition in controlling weeds, the weeds include Cyperaceae and Poaceae. The Cyperaceae plants include weeds such as drug-resistant Cyperus officinalis, Heteromorpha sedge, Cowfelt and the like. The grasses include weeds such as barnyardgrass and saxifrage.

The beneficial effects obtained by the present invention:

According to the present invention, through a large number of experimental studies, it is known that the compounding of pseudokontinine and chlorfenapyr in the range of 1:2 to 8:1 has a synergistic effect. The combined use of the two makes up for the poor control effect of chloroformil on grass weeds and pseudokontinine on sedge weeds. It has high control effect, wide herbicidal spectrum, delays weed resistance, and uses medicines. It is of low amount and environmental friendliness, and is of great significance to the integrated control of weeds (especially drug-resistant weeds).

Detailed ways

In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

The EO-PO block copolymer described in the embodiment of the present invention is a polymer surfactant, which usually uses a compound containing active hydrogen such as propylene glycol as a starting agent. Under the catalysis of alkali, polypropylene oxide (PO ) and ethylene oxide (EO). Commercially available products are used in the examples of the present invention.

Example 1: 15% Pseudokontinine·Chlorocarboxamide water dispersible granules (4:1)

The water-dispersible granules of pseudokontinine·chlorfenapyr herbicidal composition, comprising the following components in weight percentage: pseudokontinine 12%, chlorfenacil 3%, sodium lauryl sulfate 2%, Alkyl naphthalene sulfonate 7%, sodium carbonate 6%, methyl cellulose 1%, silicone antifoaming agent 0.3%, and the balance is kaolin. Water-dispersible granules are prepared by conventional methods.

Example 2: 33% pseudokontinine·chlorfenapyr herbicidal composition water dispersible granules (8:3)

Aqueous dispersible granules of pseudokontinine·chlorfenapyr herbicidal composition, comprising the following components in weight percentage: pseudokontinine 24%, chlorfenapyr 9%, sodium lauryl sulfate 3%, naphthalene sulfonate 7% of acid formaldehyde condensate, 5% of sodium bicarbonate, 1% of methyl cellulose, 0.2% of polyether defoamer, and the balance of kaolin, and prepared into water-dispersible granules according to conventional methods.

Example 3: 45% pseudokontinine·chlorfenapyr herbicidal composition water dispersible granules (4:1)

Aqueous dispersible granules of pseudokontinine·chlorfenapyr herbicidal composition, comprising the following components by weight: 36% pseudokontinine, 9% chlorfenapyr, sodium dodecylbenzenesulfonate 2% %, naphthalenesulfonic acid formaldehyde condensate 7%, sodium bicarbonate 5%, methyl cellulose 1%, polyether defoamer 0.2%, and the balance is light calcium carbonate. Water-dispersible granules are prepared by conventional methods.

Example 4: 60% pseudokontinine·chlorfenapyr herbicidal composition water dispersible granules (3:1)

The water-dispersible granules of pseudokontinine and chlorfenapyr herbicidal composition, comprising the following components by weight percentage: 45% pseudokontinine, 15% chlorfenapyr, 2% mixed alcohol polyoxyethylene ether, 7% of lignosulfonate, 5% of ammonium sulfate, 1% of soluble starch, 0.3% of high-carbon alcohol defoamer, and the balance of bentonite. Water-dispersible granules are prepared by conventional methods.

Example 5: 80% Pseudokontinine·Chlorfenapyr herbicidal composition water dispersible granules (15:1)

The water-dispersible granules of pseudokontinine and chlorfenapyr herbicidal composition, comprising the following components by weight: 75% of pseudokontinine, 5% of chlorfenapyr, 2% of mixed alcohol polyoxyethylene ether, Naphthalenesulfonic acid formaldehyde condensate 7%, sodium bicarbonate 5%, methyl cellulose 1%, silicone antifoaming agent 0.5%, and the balance is kaolin. Water-dispersible granules are prepared by conventional methods.

Example 6: 64% pseudokontinine·chlorfenapyr water dispersible granules (7:1)

Aqueous dispersible granules of pseudokontinine·chlorfenapyr, comprising the following components by weight percentage: pseudokontinine 56%, chlorfenapyr 8%, sodium dodecylbenzenesulfonate 3%, alkane 7% of naphthalene sulfonate, 5% of sodium carbonate, 1% of methyl cellulose, 0.5% of silicone defoamer, and the balance of bentonite. Water-dispersible granules are prepared by conventional methods.

Example 7: 11% Pseudokontinine·Chlorfenapyr wettable powder (8:3)

Pseudokontinine·chlorfenapyr wettable powder, including the following components in weight percentage: pseudokontinine 8%, chlorofenacil 3%, sodium dodecylbenzenesulfonate 2%, fatty amine 7% of polyoxyethylene ether, 0.2% of silicone defoamer, and the balance of diatomaceous earth. Wettable powders are prepared by conventional methods.

Example 8: 20% pseudokontinine·chlorfenapyr wettable powder (19:1)

Pseudokontinine and chlorfenapyr wettable powder, including the following components by weight: 19% pseudokontinine, 1% chlorofenacil, 2% low-viscosity methylcellulose, fatty amine polyoxygen 7% of vinyl ether, 0.3% of organosilicon defoamer, and the balance of kaolin, prepared as a wettable powder according to a conventional method.

Example 9: 42% pseudokontinine·chlorfenapyr wettable powder (6:1)

Pseudokontinine and chlorfenapyr wettable powder, comprising the following components by weight: 36% pseudokontinine, 6% chlorfenapyr, 3% sodium lauryl sulfate, naphthalenesulfonic acid formaldehyde condensate 7%, high-carbon alcohol defoamer 0.3%, and the balance is light calcium carbonate, which is made into wettable powder according to the conventional method.

Example 10: 55% pseudokontinine·chlorfenapyr wettable powder (3:2)

Pseudokontinine and chlorfenapyr wettable powder, including the following components by weight: 33% pseudokontinine, 22% chlorfenapyr, 2% mixed alcohol polyoxyethylene ether, and alkylnaphthalene sulfonate 7% of acid salt, 0.2% of polyether defoamer, and the balance of bentonite, which is made into a wettable powder according to a conventional method.

Example 11: 63% pseudokontinine·chlorfenapyr wettable powder (2:1)

Pseudokontinine and chloramphenicol wettable powder, including the following components by weight: pseudokontinine 42%, chloramphenicol 21%, sodium lauryl sulfate 3%, lignosulfonate 8 %, 0.3% of polysiloxane antifoaming agent, the balance is kaolin, and it is made into wettable powder according to the conventional method.

Example 12: 70% pseudokontinine·chlorfenapyr wettable powder (5:2)

Pseudokontinine·chlorfenapyr wettable powder, including the following components by weight: pseudokontinine 50%, chlorfenapyr 20%, GY-W04 3%, GY-D10 6%, silicon The ketone defoamer is 0.3%, the balance is kaolin, and the wettable powder is prepared according to the conventional method.

Example 13: 80% pseudokontinine·chlorfenapyr wettable powder (3:2)

Pseudokontinine and chlorfenapyr wettable powder, including the following components by weight: 48% pseudokontinine, 32% chlorfenapyr, 3% pulling powder, 8% lignosulfonate , 0.8% of polyether defoamer, bentonite to 100%, and made into wettable powder according to conventional methods.

Example 14: 12% pseudokontinine·chlorfenapyr aqueous suspension (5:1)

Aqueous suspension of pseudokontinine·chlorfenapyr herbicidal composition, comprising the following components by weight: 10% pseudokontinine, 2% chlorfenapyr, 2% alkyl sulfate, polycarboxylic acid Salt 5%, polysiloxane defoamer 0.2%, potassium sorbate 0.5%, propylene glycol 5%, xanthan gum 0.4%, and the balance is water. Aqueous suspensions are prepared according to conventional methods.

Example 15: 20% pseudokontinine·chlorfenapyr aqueous suspension (3:1)

The pseudokontinine·chlorfenapyr aqueous suspension includes the following components in weight percentage: pseudokontinine 15%, chlorfenapyr 5%, EO-PO block copolymer 2%, alkylbenzenesulfonic acid Acid 7%, polysiloxane defoamer 0.5%, sodium benzoate 0.5%, ethylene glycol 5%, aluminum magnesium silicate 0.5%, and the balance is water. Aqueous suspensions are prepared according to conventional methods.

Example 16: 10% pseudokontinine·chlorfenapyr oil suspension (1:1)

Pseudokontinine·chlorfenapyr oil suspension agent, comprising the following components in weight percentage: pseudokontinine 5%, chlorfenapyr 5%, EO-PO block copolymer 2%, nonylphenol 8% of polyoxyethylene ether phosphate sodium salt, 3% of alkylbenzene sulfonates, 2% of organic bentonite, 0.2% of capric acid, and the balance of methyl oleate, which is made into an oil suspension agent according to a conventional method.

Example 17: 44% pseudokontinine·chlorfenapyr oil suspension (3:1)

Pseudo-Kontinine·Chloroclopramide oil suspension includes the following components in weight percentage: Pseudo-Kontinine 33%, Chloroclopramide 11%, Fatty Alcohol Sulfate 2%, Dodecylbenzene Sulfonic Acid Sodium 8%, alkenyl sulfonates 2%, organic bentonite 4%, silicone oil 0.5%, the balance is soybean oil, and the oil suspension agent is prepared according to the conventional method.

Experimental Example 1: Indoor toxicity determination of the combination of pseudokontinine and chloroformamide

Target weeds: Cyperus rotundus (Cyperus rotundus L.), barnyardgrass (Echinochloa crusgalli (L.) Beauv)

Determination method: Under the condition of greenhouse (25～30℃), the experiment was carried out by indoor potting method. Evenly sprinkle the soaked target weed seeds into flowerpots, cover with soil, replenish water regularly, maintain soil moisture, and cultivate in a greenhouse. The stems and leaves of the target weeds were sprayed at the 3-4 leaf stage and barnyardgrass at the 2-3 leaf stage. Three treatments were set for pseudokontinine, and the dosages of active ingredients were 400, 800, and 1600 g/ha; three treatments were set for chlorfenacil, and the dosages of active constituents were 200, 400, and 800 g/ha; There are 9 treatments for the mixed composition of alkali + chlorfenacil, and the dosages of active ingredients are 400+200, 400+400, 400+800, 800+200, 800+400, 800+800, 1600+200, 1600 respectively. +400, 1600+800 g/ha; 4 replicates were set for each treatment, and a blank control was set separately. After treatment, they were placed in a greenhouse for cultivation, and the growth was observed regularly. The fresh weight of the aerial part was weighed 15 days after the treatment, and the virulence effect of the drug on the target weeds was evaluated by the fresh weight inhibition rate (%).

Combined effect evaluation method:

The combined action of herbicides was evaluated according to the Gowing method, and the formula was as follows:

E ₀ =X+Y－XY/100

X is the fresh weight inhibition rate of herbicide A to target weeds; Y is the fresh weight inhibition rate of herbicide B to target weeds;

E ₀ is the theoretical value of the inhibition rate of the target weed fresh weight after a single dose of A and B is compounded;

E is the measured value of the inhibition rate of the target weed fresh weight after a single dose of A and B is compounded.

Evaluation standard: when E-E ₀ >10%, it is expressed as synergistic effect, when -10%≤EE ₀ ≤10%, expressed as additive effect, when EE ₀ <-10%, expressed as antagonistic effect.

Experimental results:

Table 1. Determination results of the combined toxicity of pseudokontinine and chloroformamide and their mixed combinations on Cymbidium vulgaris

Table 2. Determination results of combined toxicity of pseudokontinine, chloroformamide and their mixtures to barnyardgrass

The results showed that the ratios of pseudokontinine and chlorfenacil were 400+200, 400+400, 400+800, 800+200, 800+400, 800+800, 1600+200, 1600+400, 1600+800. After blending, the actual control effect on Cyperus officinalis and barnyardgrass is higher than the theoretical control effect, and E-E ₀ >10%, indicating that the weight ratio of pseudokontinine and chloroformin is 1:2～8:1 has obvious synergistic effect.

Experimental Example 2: Efficacy test of pseudokontinine and chlorfenapyr in controlling field weeds:

Control objects: Common weeds occurring in the field, Cyperus rotundus L., Cyperus difformis L., Echinochloa crusgalli (L.) Beauv, Chloris virgata Sw.

Test chemicals: pseudokontin alkali wettable powder (1200g/ha), chloroformamide wettable powder (500g/ha), water dispersible granules of the herbicidal compositions of Examples 1-3, 5 (1200g/ha), Examples 8, 9, 11, 13 Wettable powder of herbicidal composition (1200g/ha), Example 15 Herbicidal composition Aqueous suspending agent (1200g/ha), Example 16 Herbicidal composition oil suspending agent (1200g/ha) ;

The experiment was carried out in a field with a high density of weeds, each plot was 20 m ² , the weeds were sprayed at the 3-4 leaf stage, and the stems and leaves were sprayed evenly with water. Before spraying, the number of plants of four kinds of weeds, namely Cymbidium officinale, sedge, barnyardgrass, and saxifrage, were counted respectively, and the plant numbers of the above four kinds of weeds were counted respectively 14 days after spraying. The prevention effect is calculated according to the following formula:

Control effect (%) = 1 - (number of weeds after application ÷ number of weeds before application) × 100%

Table 3. Field efficacy test of the combination of pseudokontinine and chlorfenapyr on weeds

The field test results showed that the compound preparations of pseudokontinine and chlorfenapyr in different proportions had significant control effects on grass weeds and sedge weeds, and were significantly better than the two single-agent control effects. After the two agents are mixed, the problems of vicious weeds in the field, such as Aconite aconite, alien sedge, barnyardgrass, sagebrush, etc., are solved.

To sum up, the composition of the present invention is reasonable, the control effect is better than the single agent of each component used alone, has the advantages of delaying weed resistance, expanding the herbicidal spectrum, and has good safety to crops, and is in line with high efficiency, safety and high selection. Policy guidelines for the application of pesticides.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A compound herbicidal composition containing pseudokontinine is characterized in that: it comprises a weight ratio of (1:2) to (8:1) pseudokontinine and chloroformil.
2. The compound herbicidal composition according to claim 1, characterized in that, the weight ratio of the pseudokontinine to chlorfenapyr is (8:1) to (8:4).
3. Compound herbicidal composition according to claim 1, is characterized in that, the weight ratio of described pseudokontinine and chlorfenapyr is 1:1.
4. A herbicide containing the compound herbicidal composition according to claim 1, characterized in that the total mass content of pseudokontinine and chloramphenicol in the herbicide is 10-80%.
5. The herbicide according to claim 4, wherein the formulation of the herbicide comprises water dispersible granules, wettable powders, water suspensions, and oil suspensions.
6. The herbicide according to claim 5, wherein the water dispersant comprises the following components by weight: 8 to 75% of pseudokontin base, 3 to 15% of chloroformamide, and 2 to 15% of wetting agent. 3%, 3-7% of dispersant, 5-6% of disintegrant, 0-1% of binder, 0.2-0.5% of defoamer, and the balance is carrier.
7. The herbicide according to claim 5, wherein the wettable powder comprises the following components by weight: 8-50% of pseudokontinine, 1-24% of chlorfenapyr, 2-24% of wetting agent 3%, dispersant 6-8%, defoamer 0.2-0.8%, and the balance is carrier.
8. The herbicide according to claim 5, wherein the water suspension agent comprises the following components in percentage by weight: 10-15% of pseudokontin base, 2-5% of chlorfenapyr, 2% of wetting agent , 5 to 7% of dispersant, 5% of antifreeze, 0.4 to 0.5% of thickener, 0.5% of preservative, 0.2 to 0.5% of defoamer, and the balance is water; the oil suspension agent includes the following weight percentages Ingredients: Pseudokontinine 5-33%, Chlorocarboxamide 5-11%, Emulsifier 0-8%, Wetting agent 2-8%, Dispersant 2-7%, Stabilizer 2-4%, Defoamer is 0.2-0.5%, and the balance is solvent.
9. Application of the compound herbicidal composition of claim 1 or the herbicide of claim 4 in controlling weeds, wherein the weeds include sedges and/or grasses.
10. The application according to claim 9, characterized in that, the Cyperaceae plants include Cyperus officinalis and/or Cyperus sylvestris; the Gramineae plants include Barnyardgrass and/or Sagittarius.