Ternary herbicide and application thereof

Abstract

The invention belongs to the field of herbicides, and particularly relates to a ternary herbicide and application thereof. The herbicide is prepared from anilofos, clomazone, butachlor, an emulsifier, a stabilizer and water. The composition provided by the invention can effectively reduce the use dosage of active ingredients, reduce the probability of phytotoxicity, prolong the lasting period, slow down the generation of drug resistance of weeds and relieve environmental pollution.

Description

Technical Field

[0001] The invention belongs to the field of herbicides, and in particular relates to a ternary herbicide and application thereof. Background Art

[0002] At present, the weeds that often occur in rice fields are mainly from the Poaceae, Ponciaceae, Alismataceae, Cyperaceae, Asteraceae, etc.

[0003] The main characteristics of weeds are strong adaptability to adverse environments, strong reproduction and regeneration capabilities, the ability to germinate at different times, vigorous growth, and the ability to inhibit the growth and spread of major cultivated crops. Weeds in rice fields not only affect the quality and yield of rice, but also affect the ecological environment by spreading pests and diseases, ultimately threatening human safety.

[0004] Cypermethrin is an organophosphorus pesticide, which belongs to the class of organophosphorus selective systemic herbicides. It can be absorbed by the young shoots and underground stems of plants, thereby inhibiting the fission and extension of cells, making it difficult for weeds to grow new leaves, and finally stop growing and die. It has a good effect on germinating weeds, but has a poor effect on grown weeds. After the weeds are treated, the plants will stop growing, the leaves will turn dark green, the leaves will become shorter and thicker, and they will break easily. The heart leaves will be difficult to germinate, and the whole plant will die. It can effectively prevent barnyard grass and sedge weeds within the 3-leaf stage, and is safe for rice.

[0005] Clomazone is a selective pre-emergence herbicide suitable for controlling annual grass weeds and broadleaf weeds in crops such as soybeans, peanuts, and corn. It has a long lasting effect and can reach the entire crop with a single application. The drug can be used throughout the entire growth period and at a flexible time. It inhibits the photosynthesis of weeds mainly through the following pathways: inhibiting the formation of chloroplasts and the integrity of their developmental structures; inhibiting the light reaction that converts light energy into chemical energy; inhibiting the biosynthesis of photosynthesis products Butachlor is an amide selective systemic herbicide. Butachlor is mainly used to control annual grass weeds and certain broadleaf weeds in direct-seeded or transplanted rice fields. It is also selective for wheat, barley, sugar beets, cotton, peanuts and cabbage crops. It is mainly absorbed by the young shoots of weeds and then transmitted to the whole plant to work. It can be used both before budding and in the seedling stage. After the plant absorbs butachlor, it inhibits and destroys proteases in the body, affects the formation of proteins, inhibits the normal growth and development of weed shoots and young roots, and thus kills the weeds. When used on clay loam and soils with high organic matter content, the agent can be absorbed by soil colloids and is not easily leached. The special effect period can reach 1-2 months.

[0006] Although there are relatively many varieties of herbicides used in rice fields, the long-term single use of a single agent will inevitably enhance the resistance of weeds. At the current stage, the development of new pesticides is difficult, costly, and time-consuming. Mixing registered single-agent herbicides is an efficient choice. After the herbicides are mixed, three different combined effects of synergism, addition, and antagonism appear. The synergistic herbicide composition can effectively reduce the dosage of active ingredients, slow down the development of weed resistance, and reduce environmental pollution. It can delay the development of resistance to a certain extent. It is not only an important measure to improve labor productivity and develop efficient and high-quality agriculture, but also the most important means in the integrated management strategy of rice field weeds. Therefore, many pesticide companies pay attention to the compounding of agents, hoping to screen out herbicidal compositions with excellent synergistic effects; at present, there is no relevant report in the prior art on the compounding of safflower, isothiocarb, and butachlor to achieve synergistic effects. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a ternary herbicide, the ingredients of which include cypermethrin, isothiocarb, butachlor, an emulsifier, a stabilizer and water.

[0008] Furthermore, the ingredients include 15% safflower, 10% isothiocarb, 35% butachlor, 4% to 12% emulsifier, 0.1% to 2% stabilizer, and the balance is water, calculated by weight percentage.

[0009] Furthermore, the formulation of the ternary herbicide is emulsifiable concentrate, dispersible oil, suspoemulsion, emulsion in water or microemulsion.

[0010] Furthermore, the formulation of the ternary herbicide is emulsifiable concentrate.

[0011] The invention also provides a method for controlling annual weeds in direct-seeding rice fields, using the ternary herbicide.

[0012] Furthermore, annual weeds include plants of the Poaceae and Cyperaceae families.

[0013] The present invention has the following beneficial effects: 1. The composition of the present invention has a significant synergistic effect; 2. The composition of the present invention can effectively reduce the dosage of active ingredients, reduce the probability of pesticide damage, prolong the effective period, slow down the development of weed resistance, and reduce environmental pollution. DETAILED DESCRIPTION

[0014] Now, various exemplary embodiments of the present invention are described in detail. The methods in the examples are conventional methods unless otherwise specified, and the reagents used are conventional commercially available reagents or reagents prepared by conventional methods unless otherwise specified. This detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, features and embodiments of the present invention.

[0015] It should be understood that the terms described in the present invention are only for describing a particular embodiment and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. The intermediate value in any stated value or stated range, and each smaller range between any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0016] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0017] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0018] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0019] Example 1

[0020] In this example, the compounded agent was used for indoor bioassay of paddy field weeds such as Echinochloa crusgalli, Leptochloa chinensis, Dalbergia vaginalis, and Cyperus difformis; Test weeds: Echinochloa crusgalli, Leptochloa chinensis, Dalbergia vaginalis, Cyperus difformis; Test method: Greenhouse potting method was adopted. The test soil was special test soil, and no pesticides were applied to the soil plots. Put the special test soil into the flowerpot; place the flowerpot in a basin filled with water, and use the bottom infiltration irrigation method to keep the soil moist. Sow 30 seeds of barnyard grass, lycopodiella chinensis, duckweed and Cyperus dimorphotype in the flowerpot, cover with 0.5cm of soil after sowing, and set the seedlings during the 2-leaf 1-core period. Keep 20 weed plants with the same growth potential in each pot and wait until they grow to the 5-leaf stage for treatment. Prepare 5 to 7 single agents of different concentrations and different ratios of the mixture, and use the potter spray device for stem and leaf spray treatment, with 3 replicates for each treatment. After treatment, place it in the greenhouse for normal management, observe the growth of the weed plants regularly, weigh the fresh weight of the aboveground part after 21 days, and calculate the fresh weight inhibition rate. The Gowing method was used to evaluate the combined effect of the herbicidal combination. According to NY / T 1155.7-2006 "Guidelines for Indoor Tests of Pesticides - Herbicides Part 7 - Determination of Combined Effects of Mixtures", the Colby method was used. O Refers to the weed control effect of herbicide ① + the weed control effect of herbicide ② + the weed control effect of herbicide ③. E refers to the actual control effect of the mixed herbicide. EE O ≥10% is synergistic effect; EE O ≤-10% is antagonistic; -10%≤EE O When ≤10%, it is additive.

[0021]

[0022] Where: X—fresh weight control effect of herbicide ① at the dosage of P; Y—fresh weight control effect of herbicide② when the dosage is Q; Z—fresh weight control effect of herbicide ③ at a dosage of R; The results of the ratio screening test show that: The EE of safflower, isothiocarb and butachlor in the ratio of (75-125): (50-75): (175-275) on Echinochloa crusgalli, Leptochloa chinensis, Dalbergia vaginalis and Cyperus difformis was significantly increased. 0 The values ​​of are all greater than 10%, showing a significant synergistic effect. Therefore, the three are feasible for compounding at a ratio of (75-125): (50-75): (175-275), among which the most significant synergistic effect is 75:50:175, with EE of 1.3% and EE of 1.5% against the four weeds. 0 The values ​​of were the highest, all greater than 13. Based on this, the formulation screening and field tests were carried out. The specific screening test results are shown in Tables 1, 2, 3, and 4.

[0023] Table 1 Activity determination of combined action against barnyard grass

[0024] Table 2 Determination of the activity of combined action on Leptochloa chinensis

[0025] Table 3 Determination of the activity of combined action on Dalbergia tongue

[0026] Table 4 Activity determination of combined action against Cyperus dimorphus

[0027] Example 2 Based on the above ratio test, this example screened emulsifiable concentrates and suspoemulsions with suspension rate and heat storage stability as indicators, and the screening results showed that emulsifiable concentrates were ideal. The specific results of the dosage form screening are shown in Table 5.

[0028] Table 5 Activity and thermal storage stability test table Dosage form Suspension rate / % Thermal storage stability 60% cypermethrin, isothiocarb, butachlor EC (15% + 10% + 35%) 95 qualified 60% cypermethrin, isothiocarb, butachlor SE (15% + 10% + 35%) ＜95 Failure Among them, the adjuvant of 60% cypermethrin·isothiazolin·butachlor EC (15%+10%+35%) was screened and optimized, and the following ratio was initially determined: The emulsifiable concentrate comprises, based on 100 parts by weight, 15 parts of safflower, 10 parts of clomazone, 35 parts of butachlor, 12% of an emulsifier, 2% of a stabilizer, and the remainder is made up with water.

[0029] Specific processing flow: first add the measured amount of silymarin into the sand mill for sand grinding. When the particles of the original drug powder are less than 40um, open the feed valve and enter the shear mixer, add some additives for stirring. On the other hand, put isocyanate and butachlor and the corresponding additives into their own separate shear mixers for sufficient shearing and stirring. After the properties are stable, put the three into the same shear mixer, and add other additives at the same time for high-speed shearing. After the physical and chemical properties are stable, enter the modulation kettle, stir evenly, open the bottom valve of the modulation kettle, add the suspoemulsion to the filter for filtration, move the filtered suspoemulsion to the suspension tank, let it stand, and after natural defoaming, take samples for testing. After passing the test, send it to the suspension packaging machine for packaging.

[0030] Example 3 Based on the above ratio and formulation, this experimental example carried out a field efficacy test of the composition in rice fields in accordance with the pesticide field efficacy test guidelines. The field test results showed that: considering the cost, efficacy, safety and other aspects, the dosage of 60% cypermethrin·isothiazolin·butachlor EC was 384g ai / hm 2 The optimal ratio is (75+50+175). The specific screening test results are shown in Table 6.

[0031] The experiment was arranged in Jiexiang Town, Ruili City, Yunnan Province. Echinochloa crus-galli, Leptochloa chinensis, Dactylopius tongue grass, Cyperus difformis and other grasses occurred in the field. The stems and leaves were sprayed when the rice was in the 3-5 leaf stage and the weeds were in the 2-3 leaf stage. The water volume was 60L / mu, each plot was 100 square meters, and repeated 3 times. The control effect on weeds and the safety to rice were investigated 20 days after application.

[0032] Table 6 The combined effect of the ternary combination on barnyard grass and its safety to rice in the field test

[0033] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A ternary herbicide, characterized in that: The ingredients include saframfos, clomazone, butachlor, an emulsifier, a stabilizer and water; calculated by weight percentage, the ingredients include 15% saframfos, 10% clomazone, 35% butachlor, 4% to 12% emulsifier, 0.1% to 2% stabilizer, and the balance is water.

2. The ternary herbicide according to claim 1, characterized in that: The formulation of the ternary herbicide is emulsifiable concentrate, dispersible oil, suspoemulsion, aqueous emulsion or microemulsion.

3. The ternary herbicide according to claim 1, characterized in that: The formulation of the ternary herbicide is emulsifiable concentrate.

4. A method for controlling annual weeds in direct-seeded rice fields, characterized in that: Use the ternary herbicide as described in any one of claims 1 to 3.

5. The control method according to claim 4, characterized in that: The annual weeds include plants of the Poaceae family and the Cyperaceae family.

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