Herbicidal composition, herbicide and use thereof

Abstract

The present invention relates to a kind of herbicidal composition, herbicide and application thereof.The herbicidal composition includes component A, component B and component C, wherein component A is cashew nut shell liquid and / or tea tree essential oil, component B is tembotrione, component C is selected from at least one of S-isopropylamine, 2-methyl-4-chloro and its derivatives, clofopyralid and its derivatives, atrazine, nicosulfuron, and the mass ratio of component A, component B and component C is 1:(1 2.5):(1 10).The herbicidal composition of the present invention shows good synergistic effect, and in terms of preventing and treating grass weeds, broadleaf weeds and sedge, the herbicidal effect of the herbicidal composition is better than the herbicidal effect of a single component.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural herbicides, in particular to a herbicide composition, a herbicide and applications thereof. Background Art

[0002] Herbicides, also known as weed killers, are agents that selectively or completely kill weeds. Made from organic compounds, they are widely used to control weeds, shrubs, trees, and other harmful plants in farmland, orchards, flower nurseries, grasslands, non-arable land, railway lines, rivers, reservoirs, warehouses, and other areas. However, the widespread use of herbicides has also led to a series of problems, such as the emergence of herbicide-resistant weeds, soil pollution, water quality degradation, and harm to non-weed organisms. Furthermore, the emergence of herbicide-resistant weeds has made it difficult to control the damage caused by mixed weeds using only chemical herbicides. Summary of the Invention

[0003] Based on this, it is necessary to provide a herbicidal composition, a herbicide and its application to address the above problems. The herbicidal composition exhibits good synergistic effects and has good effects in preventing and controlling grass weeds, broadleaf weeds and sedges.

[0004] A herbicidal composition comprises component A, component B and component C, wherein component A is cashew nut shell liquid and / or tea tree essential oil, component B is tembotrione, and component C is selected from at least one of S-isopropylamine, 2-Methyl-4-chloropyraclostrobin and its derivatives, clofopyralid and its derivatives, atrazine, and nicosulfuron, and the mass ratio of component A to component B to component C is 1:(1-2.5):(1-10).

[0005] In one embodiment, the mass ratio of the component A, the component B and the component C is 1:(1.5-2):(1-10).

[0006] In one embodiment, in the herbicidal composition, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is S-metolachlor;

[0007] Alternatively, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is flupyr;

[0008] Alternatively, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is nicosulfuron;

[0009] Alternatively, the ingredient A is tea tree essential oil, the ingredient B is tembotrione, and the ingredient C is metolachlor.

[0010] A herbicide comprising the above-mentioned herbicidal composition and an adjuvant permitted for use in pesticides.

[0011] In one embodiment, the herbicide is in the form of an emulsifiable concentrate, a wettable powder, a water-dispersible granule, a suspension concentrate, an aqueous emulsion, a microemulsion, a granule, a dispersible oil suspension, a microcapsule suspension, a suspoemulsion, a soluble powder or a soluble granule.

[0012] In one embodiment, the mass fraction of the herbicidal composition in the herbicide is 0.5%-90%.

[0013] In one embodiment, the mass fraction of the herbicidal composition in the herbicide is 20%-75%.

[0014] Use of the above-mentioned herbicidal composition or the above-mentioned herbicide in controlling grass weeds, broadleaf weeds and sedges.

[0015] In one embodiment, the herbicide is used to control weeds in corn fields.

[0016] In one embodiment, the herbicide is used in an amount of 50 g (ai) / hm 2 -500g(ai) / hm 2 .

[0017] The herbicidal composition provided by the present invention exhibits a synergistic effect among components A, B, and C by selecting and combining them in a mass ratio of 1:(1-2.5):(1-10). This results in superior weed control efficacy compared to individual components in controlling grass weeds, broadleaf weeds, and sedges. Furthermore, component A is a plant-derived component, while components B and C are low-toxic. Their synergistic use can mitigate potential environmental threats, thus offering broad application prospects. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] The herbicidal composition provided by the present invention comprises component A, component B and component C.

[0021] Among them, the component A is cashew nut shell liquid and / or tea tree essential oil. Cashew nut shell liquid is a brown viscous liquid whose main component is cardanol, which has certain herbicidal activity against grass weeds such as barnyard grass and Leptochloa chinensis; tea tree essential oil (Melaleuca alternifolia essential oil) also has certain herbicidal activity against grass weeds such as barnyard grass and Leptochloa chinensis.

[0022] The component B is tembotrione, which is a post-emergence HPPD (parahydroxyphenylpyruvate dioxygenase) inhibitory herbicide that can be used to control grass weeds. Its mechanism of action is to block the biosynthesis of isoprenylquinone in the plant, causing chlorosis, fading, tissue necrosis, and ultimately death. In addition, tembotrione has a broad herbicidal spectrum and can maintain good herbicidal activity throughout the entire growth period of the crop, and can also effectively control broadleaf weeds.

[0023] The component C is selected from at least one of S-isopropylamine, 2-Methyl-4-chloropyraclostrobin and its derivatives, clofopyralid and its derivatives, atrazine, and nicosulfuron.

[0024] Among them, S-isopropylamine is an acetamide herbicide with a chloroacetamide structure. It is a cell division inhibitor and affects cell growth by inhibiting the synthesis of long-chain fatty acids. It is selective and is mainly absorbed through the hypocotyl and buds. Roots and seeds can also absorb a small amount, but the conduction speed is slow. After emergence, it is mainly absorbed by the roots. After the application of S-isopropylamine, more sensitive weeds can be poisoned and die just after emerging from the soil or even before emerging from the soil. If the soil moisture is good, the weeds will be killed in the young sprout stage. If the soil moisture is low, even if the weeds emerge, as the rainfall increases and the soil moisture increases, the weeds will shrink, turn yellow, and die after absorbing S-isopropylamine.

[0025] 2-Methyl-4-chloro-4-pyraclostrobin and its derivatives, clofopyralid and its derivatives, atrazine, and nicosulfuron are all systemic herbicides. After being absorbed by plants, they can inhibit the activity of acetolactate synthase in plants and interfere with the balance of hormones in plants. The two mechanisms of influence work together to achieve better weed killing effects and a wider killing range.

[0026] Furthermore, the present invention combines component A, component B, and component C and controls the mass ratio to be 1:(1-2.5):(1-10), thereby enabling component A, component B, and component C to exhibit a good synergistic effect. Compared with using component A, component B, or component C alone, the weed control effect is significantly improved. In a control effect experiment 30 days after application, the total weed control effect and fresh weight control effect both reached more than 90%.

[0027] In one embodiment, in the herbicidal composition, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is isopropylamine; or, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is clofopyralid; or, the ingredient A is cashew nut shell liquid, the ingredient B is tembotrione, and the ingredient C is nicosulfuron; or, the ingredient A is tea tree essential oil, the ingredient B is tembotrione, and the ingredient C is isopropylamine. These herbicidal compositions can show better control effects on weeds.

[0028] In order to make component A, component B and component C have a better synergistic effect, in one embodiment, the mass ratio of component A, component B and component C is preferably 1:(1.5-2):(1-10).

[0029] In addition, the cashew nut shell liquid in ingredient A comes from natural non-toxic cashew nut shells, and the tea tree essential oil comes from the leaves and tender shoots of the tea tree. Both are plant-derived ingredients. Components B and C are low-toxic ingredients. Their synergistic use can reduce potential threats to the environment and has broad application prospects.

[0030] The present invention provides a herbicide, which comprises the above-mentioned herbicidal composition and an adjuvant allowed to be used in pesticides.

[0031] Specifically, the adjuvants allowed for use in pesticides include, but are not limited to, water, solvents, fillers, various surfactants (such as emulsifiers, dispersants, wetting agents, etc.), binders, film-forming agents, colorants, antifreeze agents, thickeners, suspending agents, disintegrants, defoaming agents, penetrants, synergists, stabilizers, wall capsule materials, pH regulators, preservatives, safeners, etc.

[0032] In one embodiment, the herbicide is in the form of an emulsifiable concentrate, a wettable powder, a water-dispersible granule, a suspension concentrate, an aqueous emulsion, a microemulsion, a granule, a dispersible oil suspension, a microcapsule suspension, a suspoemulsion, a soluble powder or a soluble granule.

[0033] In order to promote crop growth and development while removing weeds, conventional agricultural fertilizers can also be added to herbicides to make a drug-fertilizer mixture.

[0034] In order to better exert the weed control effect of the herbicide, in one embodiment, the mass fraction of the herbicidal composition in the herbicide is 0.5%-90%, preferably 20%-75%.

[0035] The present invention also provides the use of the above-mentioned herbicidal composition or the above-mentioned herbicide in controlling grass weeds, broadleaf weeds and sedges, including but not limited to weeds of the genera Abutilon, Portulaca, Amaranthus, Chenopodium, Leguminosae, Amaranthaceae, Pharbitis, Convolvulus, Humulus, Echinochloa, Digitaria, Setaria, Chloris, Timothy, Coleus and Cyperus.

[0036] In one embodiment, the herbicide is used to control weeds in corn fields. The herbicide can be used in various ways, such as by adding water and spraying in a conventional manner, and can be used in the early stage after the weeds emerge.

[0037] In order to better control weeds in corn fields, in one embodiment, the amount of the herbicide is 50g (ai) / hm 2 -500g(ai) / hm 2 , depending on the soil conditions, application method, crops, weed species and seedling age to be controlled, climatic conditions, etc.

[0038] The herbicide provided by the present invention is prepared using the above-mentioned herbicide composition as a raw material. In terms of preventing and controlling grass weeds, broadleaf weeds and sedges, the herbicide has a better weed control effect than the herbicide prepared using a single component as a raw material.

[0039] Hereinafter, the herbicidal composition, the herbicide and the application thereof will be further described through the following specific examples.

[0040] The raw materials or adjuvants used in the herbicidal composition and herbicide provided in the embodiments of the present invention can all be purchased from the market, among which the technical of tembotrione was purchased from Anhui Jiuyi Co., Ltd.

[0041] Indoor bioassay tests have shown that the herbicidal composition of the present invention has a significant synergistic effect on various weeds when mixed with cashew nut shell liquid or tea tree essential oil and tembotrione, as illustrated by the following bioassay test.

[0042] Bioassay test: Determination of the combined toxicity of cashew nut shell liquid or tea tree essential oil mixed with tembotrione to the weeds Digitaria sanguinalis and Atractylodes lancea.

[0043] Test method: With reference to the Guidelines for Indoor Bioassay of Pesticides NY / T1155.4-2006, the stem-leaf spraying method was used to treat crabgrass and Atractylodes lanceolata, respectively.

[0044] Evaluation of combined effects: The combined effects of herbicides were evaluated according to the Gowing method (NY / T 1155.7-2006). The formula is: Theoretical fresh weight inhibition rate (E0) (%) = X + Y + Z - XYZ / 100, where X is the fresh weight inhibition rate of component A at a specific dose on the target weed; Y is the fresh weight inhibition rate of component B at a specific dose on the target weed; and Z is the fresh weight inhibition rate of component C at a specific dose on the target weed. Fresh weight inhibition rate (P) (%) = (control fresh weight - treatment fresh weight) / treatment fresh weight × 100%. E is the fresh weight inhibition rate of component A, component B, and component C when used together.

[0045] Evaluation criteria: when E-E0>10%, it indicates synergistic effect; when -10%<E-E0<10%, it indicates additive effect; when E-E0<-10%, it indicates antagonistic effect.

[0046] The results of the combined toxicity test of cashew nut shell liquid or tea tree essential oil and tembotrione and their mixed compositions in different proportions to Digitaria and Atractylodes macrocephala are shown in Tables 1 and 2.

[0047] Table 1

[0048]

[0049]

[0050] Table 2

[0051]

[0052] According to Tables 1 and 2, the combination of cashew nut shell liquid or tea tree essential oil and tembotrione has a good synergistic effect on the control of weeds.

[0053] In order to further verify the weed control effect of the combination of component A, component B and component C, the present invention provides the following examples and comparative examples for verification.

[0054] Example 1

[0055] Prepare the following herbicide by mass percentage: 5% cashew nut shell liquid, 5% tembotrione, 30% S-isopropylamine emulsifiable concentrate, add soybean oil to 100%, mix until a uniform liquid phase is obtained, and the treatment dose of the herbicide is 400g (ai) / hm 2 .

[0056] Example 2

[0057] Example 2 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 4%, tembotrione 5%, 2-Methyl-4-chloro-4-one suspension concentrate 40%, and the treatment dose of the herbicide was 490 g (ai) / hm2. 2 .

[0058] Example 3

[0059] Example 3 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 4%, tembotrione 5%, clofopyralid dispersible oil suspension 10%, and the treatment dose of the herbicide was 190 g (ai) / hm2. 2 .

[0060] Example 4

[0061] Example 4 was carried out in accordance with Example 1, except that the following components were formulated by mass percentage: cashew nut shell liquid 3%, tembotrione 3%, atrazine dispersible oil suspension concentrate 30%, and the treatment dose of the herbicide was 480 g (ai) / hm2. 2 .

[0062] Example 5

[0063] Example 5 was carried out in accordance with Example 1, except that the following components were prepared by mass percentage: cashew nut shell liquid 5%, tembotrione 10%, nicosulfuron dispersible oil suspension concentrate 5%, and the treatment dose of the herbicide was 160 g (ai) / hm2. 2 .

[0064] Example 6

[0065] Example 6 was carried out in accordance with Example 1, except that the following components were prepared by mass percentage: 5% tea tree essential oil, 5% tembotrione, and 30% metolachlor emulsifiable concentrate. The treatment dose of the herbicide was 400 g (ai) / hm2. 2 .

[0066] Example 7

[0067] Example 7 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: tea tree essential oil 4%, tembotrione 5%, 2-Methyl-4-chloro-4-one suspension concentrate 40%, and the treatment dose of the herbicide was 490 g (ai) / hm2. 2 .

[0068] Example 8

[0069] Example 8 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: 4% tea tree essential oil, 5% tembotrione, 10% clofopyralid dispersible oil suspension, and the treatment dose of the herbicide was 190 g (ai) / hm2. 2 .

[0070] Example 9

[0071] Example 9 was carried out in accordance with Example 1, except that the following components were prepared by mass percentage: 3% tea tree essential oil, 3% tembotrione, 30% atrazine dispersible oil suspension concentrate, and the treatment dose of the herbicide was 480 g (ai) / hm2. 2 .

[0072] Example 10

[0073] Example 10 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: 5% tea tree essential oil, 10% tembotrione, 5% nicosulfuron dispersible oil suspension concentrate, and the treatment dose of the herbicide was 160 g (ai) / hm2. 2 .

[0074] Example 11

[0075] Example 11 was carried out in accordance with Example 1, except that the following components were prepared by mass percentage: 2.5% cashew nut shell liquid, 2.5% tea tree essential oil, 5% tembotrione, and 30% metolachlor emulsifiable concentrate. The treatment dose of the herbicide was 400 g (ai) / hm2. 2 .

[0076] Comparative Example 1

[0077] Comparative Example 1 was carried out with reference to Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 40%, soybean oil added to 100%, and the treatment dosage was 400 g (ai) / hm2. 2 .

[0078] Comparative Example 2

[0079] Comparative Example 2 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: 40% tea tree essential oil, 100% soybean oil, and a treatment dosage of 400 g (ai) / hm2. 2 .

[0080] Comparative Example 3

[0081] Comparative Example 3 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: 40% tembotrione, 100% soybean oil, and the treatment dosage was 50 g (ai) / hm2. 2 .

[0082] Comparative Example 4

[0083] Comparative Example 4 was carried out in accordance with Example 5, except that the following were prepared by mass percentage: 40% tembotrione, 100% soybean oil, and the treatment dosage was 160 g (ai) / hm2. 2 .

[0084] Comparative Example 5

[0085] Comparative Example 5 was carried out with reference to Example 1, except that the herbicide was 960 g / L of S-isopropylamine emulsifiable concentrate and the treatment dose of the herbicide was 400 g (ai) / hm2. 2 .

[0086] Comparative Example 6

[0087] Comparative Example 6 was carried out in accordance with Example 2, except that the following were prepared by mass percentage: 40% sodium 2-methyl-4-chloropropane, 100% soybean oil, and a treatment dosage of 490 g (ai) / hm2. 2 .

[0088] Comparative Example 7

[0089] Comparative Example 7 was carried out in accordance with Example 3, except that the following were prepared by mass percentage: 40% isooctyl clofopyralid, soybean oil was added to 100%, and the treatment dosage was 190 g (ai) / hm2. 2 .

[0090] Comparative Example 8

[0091] Comparative Example 8 was carried out in accordance with Example 4, except that the following were prepared by mass percentage: atrazine 40%, soybean oil was added to 100%, and the treatment dosage was 480 g (ai) / hm2. 2 .

[0092] Comparative Example 9

[0093] Comparative Example 9 was carried out in accordance with Example 5, except that the following were prepared by mass percentage: nicosulfuron 40%, soybean oil was added to 100%, and the treatment dosage was 160 g (ai) / hm2 2 .

[0094] Comparative Example 10

[0095] Comparative Example 10 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 20%, tembotrione 20%, soybean oil added to 100%, and the treatment dosage was 100g (ai) / hm 2 .

[0096] Comparative Example 11

[0097] Comparative Example 11 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: S-isopropylamine 35%, tembotrione 5%, soybean oil was added to 100%, and the treatment dosage was 400 g (ai) / hm2 2 .

[0098] Comparative Example 12

[0099] Comparative Example 12 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 5%, S-isopropylamine 35%, soybean oil was added to 100%, and the treatment dosage was 400 g (ai) / hm 2 .

[0100] Comparative Example 13

[0101] Comparative Example 13 was carried out in accordance with Example 1, except that the following were prepared by mass percentage: cashew nut shell liquid 5%, tembotrione 15%, metolachlor emulsifiable concentrate 55%, soybean oil was added to 100%, and the treatment dosage was 400 g (ai) / hm 2 .

[0102] Test Example 1

[0103] The herbicides of Examples 1-11 and Comparative Examples 1-13 were applied to corn fields using a conventional spraying method to control perennial and annual weeds. The weeds in the experimental corn fields were at the 2-leaf stage to the 5-leaf stage. The experimental corn fields were flat, the soil was loam, the fertility was medium, and the pH value was 7.1. Fertilizer and water management was moderate during the experiment. The plant control efficacy and fresh weight control efficacy were measured 30 days after application. The plant control efficacy (%) = (number of weed plants before application - number of weed plants after application) / number of weed plants before application × 100%, and the fresh weight control efficacy (%) = (fresh weight of control - fresh weight of treatment) / fresh weight of treatment × 100%. The results are shown in Table 3.

[0104] Table 3

[0105]

[0106]

[0107]

[0108] As shown in Table 3, the herbicide prepared using the herbicidal composition comprising component A, component B, and component C as raw materials has a good weed control effect on corn fields.

[0109] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A herbicidal composition, characterized in that The herbicidal composition consists of component A, component B, and component C, wherein component A is cashew nut shell liquid and / or tea tree essential oil, component B is tembotrione, and component C is S-isopropylamine. The mass ratio of component A, component B, and component C is 1:(1-2.5):(1-10). The herbicidal composition is used for controlling grass weeds, broadleaf weeds, and sedges in corn fields.

2. The herbicidal composition according to claim 1, characterized in that The mass ratio of the component A, the component B and the component C is 1:(1.5-2):(1-10).

3. The herbicidal composition according to claim 1, wherein In the herbicidal composition, the component A is cashew nut shell liquid, the component B is tembotrione, and the component C is metolachlor; Alternatively, the ingredient A is tea tree essential oil, the ingredient B is tembotrione, and the ingredient C is metolachlor.

4. A herbicide, characterized in that The herbicide comprises the herbicidal composition according to any one of claims 1 to 3 and an adjuvant permitted for use in pesticides.

5. The herbicide according to claim 4, characterized in that The herbicide is in the form of emulsifiable concentrate, wettable powder, water-dispersible granules, suspension, aqueous emulsion, microemulsion, granule, suspoemulsion, soluble powder or soluble granule.

6. The herbicide according to claim 4 or 5, characterized in that The mass fraction of the herbicidal composition in the herbicide is 0.5%-90%.

7. The herbicide according to claim 6, characterized in that The mass fraction of the herbicidal composition in the herbicide is 20%-75%.

8. Use of the herbicidal composition according to any one of claims 1 to 3 or the herbicide according to any one of claims 4 to 7 for controlling grass weeds, broadleaf weeds and sedges.

9. The use according to claim 8, characterized in that Application of the herbicide in controlling weeds in corn fields.

10. The use according to claim 9, characterized in that The dosage of the herbicide is 50g (ai) / hm 2 -500g(ai) / hm 2 .

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