CN109819990B - Herbicide for direct seeding rice field and preparation method thereof - Google Patents
Herbicide for direct seeding rice field and preparation method thereof Download PDFInfo
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- CN109819990B CN109819990B CN201910242671.1A CN201910242671A CN109819990B CN 109819990 B CN109819990 B CN 109819990B CN 201910242671 A CN201910242671 A CN 201910242671A CN 109819990 B CN109819990 B CN 109819990B
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Abstract
The invention discloses a herbicide for a direct-seeding rice field, which comprises the following raw materials in parts by weight: 24-44 parts of pretilachlor, 10-11 parts of metamifop, 5-10 parts of a safener, 15-20 parts of an emulsifier, 1-4 parts of a dispersant, 2-3 parts of a thickener and 30-45 parts of a dispersion medium. The invention provides a herbicide for paddy direct seeding fields, which takes pretilachlor and metamifop as effective components, pretilachlor is closed weeding and can effectively remove weeds before germination, metamifop is post-emergence weeding, the pretilachlor and the metamifop have good effects on unearthed and unearthed weeds by combining the two, and the weeding spectrum is expanded. The dispersible oil suspending agent is prepared by selecting a proper medicine proportion and then assisting a safener, an emulsifier, a dispersant, a thickener and a dispersion medium, has high content of effective components and stable quality, improves the weeding efficiency, enlarges the weeding spectrum, reduces the production cost, and is environment-friendly and safe. The invention also provides a preparation method of the herbicide for the direct seeding rice field, and the preparation method has the characteristics of convenience in operation and convenience in industrialization.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a paddy field direct seeding field herbicide and a preparation method thereof.
Background
In recent years, because the direct seeding rice is labor-saving, cost-saving and capable of reducing the occurrence of stripe leaf blight in the seedling stage, the spontaneous planting area of farmers is larger and larger, and the direct seeding rice is rapidly popularized in more and more replacement transplanting fields in many areas, but the weed damage is a main obstacle influencing the high yield and the stable yield of the direct seeding rice. The causes of the growing occurrence of the weeds are: in the direct-seeding rice field, the space for the growth of weeds in the early growth stage is large, and the alternate dry and wet in the rice field is also favorable for the generation of weeds, so that the problem of weed damage is particularly outstanding. On the other hand, because the rice seeds are sensitive to the herbicide during germination, the herbicide can be used in the direct-seeding field with few varieties, and the research on the safe and efficient herbicide in the direct-seeding field is particularly important. The existing herbicides in the market are various in types, but most of the herbicides generate great pollution to the land after being used, the soil structure is changed, and the taste of crops is influenced; and many herbicides can damage the seedling body and influence the growth speed of the seedling body when being used. The application of single paddy field herbicide and the repeatability of the application are realized at present. Increasing the cost of labor. The problems of high residue, environmental pollution, weed drug resistance, resistance evolution and the like are easily caused by long-term continuous high-dose use of a single variety or single action mode of chemical herbicide. The existing herbicide finished products in the market have the problems of unstable quality, incapability of fully utilizing effective components, unreasonable proportion and poor formula stability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the herbicide for the direct-seeding paddy field, which has the characteristics of improvement on the utilization rate of effective components, convenience in use, environmental friendliness and safety.
The second purpose of the invention is to provide a preparation method of the herbicide for the direct seeding field of rice.
One of the purposes of the invention is realized by adopting the following technical scheme:
a herbicide for a direct seeding field of paddy rice comprises the following raw materials in parts by weight: 24-44 parts of pretilachlor, 10-11 parts of metamifop, 5-10 parts of a safener, 15-20 parts of an emulsifier, 1-4 parts of a dispersant, 2-3 parts of a thickener and 30-40 parts of a dispersion medium.
Further, the feed additive comprises the following raw materials in parts by weight: 30 parts of pretilachlor, 10 parts of metamifop, 7.5 parts of a safener, 15 parts of an emulsifier, 3.5 parts of a dispersant, 2 parts of a thickener and 32 parts of a dispersion medium.
Further, the herbicide is in the form of dispersible oil suspending agent.
Further, the safener is fenclorim.
Further, the emulsifier is OD-3520 and GYOD-05, and the dispersant is one OF GY-D09, GY-ODE286 and SP-OF 3498D. Wherein the emulsifier OD-3520 is purchased from Nanjing Ke Macro chemical Co., Ltd, the GYOD-05 is purchased from Guangyuan Yinong chemical responsibility Co., Ltd, the dispersants GY-D09 and GY-ODE286 are purchased from Guangyuan Yinong chemical responsibility Co., Ltd, and the dispersant SP-OF3498D is purchased from Jiangsu Qingyu chemical science and technology Co., Ltd.
Further, the thickening agent is organic bentonite, and the dispersion medium is methyl oleate.
The second purpose of the invention is realized by adopting the following technical scheme:
the preparation method of the herbicide for the direct seeding field of rice comprises the following steps: adding pretilachlor, metamifop, a safener, an emulsifier, a dispersant, a thickener and a dispersion medium into a container, transferring to a sand mill, adding a grinding medium, grinding uniformly, and finally separating the liquid medicine from the grinding medium to obtain the product.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a herbicide for paddy direct seeding fields, which takes pretilachlor and metamifop as effective components, pretilachlor is closed weeding and can effectively remove weeds before germination, metamifop is post-emergence weeding, the pretilachlor and the metamifop have good effects on unearthed and unearthed weeds by combining the two, and the weeding spectrum is expanded. The dispersible oil suspending agent is prepared by selecting a proper medicine proportion and then assisting a safener, an emulsifier, a dispersant, a thickener and a dispersion medium, has high content of effective components and stable quality, improves weeding efficiency, enlarges weed control spectrum, reduces production cost, and is environment-friendly and safe. The invention also provides a preparation method of the herbicide for the direct seeding rice field, which has the characteristics of convenient operation, easy realization and convenient industrial production.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
Example 1
A herbicide for a direct seeding field of paddy rice is composed of the following raw materials in parts by weight: 30 parts OF pretilachlor, 10 parts OF metamifop, 7.5 parts OF fenclorim, OD-352015 parts, SP-OF3498D 3.5.5 parts, 2 parts OF organic bentonite and 32 parts OF methyl oleate.
The preparation method of the herbicide for the direct seeding field of rice comprises the following steps: adding pretilachlor, metamifop, fenclorim, OD-3520, SP-OF3498D, organic bentonite and methyl oleate into a container, transferring to a sand mill, adding a grinding medium, grinding uniformly, and finally separating the liquid medicine from the grinding medium to obtain the product.
Example 2
A herbicide for a direct seeding field of paddy rice is composed of the following raw materials in parts by weight: 30.8 parts of pretilachlor, 10.3 parts of metamifop, 7.9 parts of fenclorim, GYOD-0517 parts of GY-D092 parts of organic bentonite and 39 parts of methyl oleate.
The preparation method of the herbicide for the direct seeding paddy field is the same as that of the example 1.
Example 3
A herbicide for a direct seeding field of paddy rice is composed of the following raw materials in parts by weight: 24 parts of pretilachlor, 10.5 parts of metamifop, 5.5 parts of fenclorim, GYOD-0518 parts, GY-ODE 2863 parts, 3 parts of organic bentonite and 36 parts of methyl oleate.
The preparation method of the herbicide for the direct seeding paddy field is the same as that of the example 1.
Example 4
A herbicide for a direct seeding field of paddy rice is composed of the following raw materials in parts by weight: 44 parts OF pretilachlor, 11 parts OF metamifop, 10 parts OF fenclorim, GyOD-0515 parts OF SP-OF3498D 2 parts OF bentone and 30 parts OF methyl oleate.
The preparation method of the herbicide for the direct seeding paddy field is the same as that of the example 1.
Comparative example 1
Comparative example 1 provides a herbicide for a paddy field, which is different from example 1 in that an emulsifier is replaced By an emulsifier sold By Jiangsu clock mountain chemical Co., Ltd, and the model is By-110.
Comparative example 2
Comparative example 2 provides a herbicide for a paddy field, which is different from example 1 in that an emulsifier is replaced with an emulsifier of type EL-40 manufactured and sold by chemical limited of kegshan.
Comparative example 3
Comparative example 3 provides a herbicide for direct-seeded rice fields, which differs from example 1 in that the emulsifier is replaced by 1838-Y, a type manufactured and sold by Henan Hengsheng Runshi Biotech limited.
Comparative example 4
Comparative example 4 provides a herbicide for a paddy field, which is different from example 1 in that an emulsifier is replaced by an emulsifier of model OD-7811 manufactured and sold by henna jusheng moisten bio-technology limited.
Comparative example 5
Comparative example 5 provides a herbicide for a paddy field, which is different from example 1 in that an emulsifier is replaced by an emulsifier sold under the model GYOD-01 by broad-source agricultural chemical responsibility Co.
Comparative example 6
Comparative example 6 provides a herbicide for direct seeding paddy field, which is different from example 1 in that the dispersant is replaced by a dispersant with model number 3472-B manufactured and sold by Jiangsu Optimus chemical technology Limited liability company.
Comparative example 7
Comparative example 7 provides a herbicide for direct seeding rice field, which is different from example 1 in that the thickener is replaced with magnesium aluminum silicate.
Comparative example 8
Comparative example 8 provides a herbicide for a paddy field, which is different from example 1 in that the thickener is replaced by white carbon black.
The dispersion and stability of the products of statistical example 1 and comparative examples 1 to 5 were observed, and the results are shown in table 1.
TABLE 1
| Sample (I) | Dispersibility | Stability of |
| Example 1 | White by 200 times dilution, no floating oil and no precipitate | Qualified |
| Comparative example 1 | Poor dispersion due to 200 times dilution and floating oil droplets | Fail to be qualified |
| Comparative example 2 | White color with 200 times dilution and large amount of floating ointment | Fail to be qualified |
| Comparative example 3 | White by 200 times dilution, with a small amount of oil slick | Fail to be qualified |
| Comparative example 4 | White by 200 times dilution, with a small amount of oil slick | Fail to be qualified |
| Comparative example 5 | White by 200 times dilution, with a small amount of oil slick | Fail to be qualified |
As can be seen from Table 1, after the emulsifier is replaced by other emulsifiers, the product has poor dispersibility and poor stability, which shows that the emulsifier added in the invention is matched with pretilachlor and metamifop for use, and the obtained product has good dispersibility and stability.
The flow and suspension ratios of statistical example 1 and comparative example 6 were observed, respectively, and the results are shown in table 2.
TABLE 2
As can be seen from Table 2, the product has poor fluidity and low suspension rate after the dispersant of the invention is replaced, which shows that the product obtained by using the dispersant of the invention in combination with pretilachlor and metamifop has good fluidity and high suspension rate.
The stability of example 1, comparative examples 7 and 8 at 54 ℃. + -. 2 heat storage 14d was statistically determined, respectively, and the results are shown in Table 3.
TABLE 3
| Sample (I) | Suspension Rate (%) | Oil separating Rate (%) |
| Example 1 | 86.4 | 5.8 |
| Comparative example 7 | 77 | 7.6 |
| Comparative example 8 | 83.4 | 15 |
The viscosity of the oil suspending agent is an important index of the storage stability of the product. The thickening agent can adjust the viscosity of the preparation, the increase of the viscosity of the medium can reduce the sedimentation speed of the particles, and the proper viscosity ensures that the preparation has good stability and high suspension rate. The layering is easily caused due to the low viscosity, and the caking is easy to occur after long-term storage; too high viscosity results in poor fluidity, poor dispersibility, and difficulty in production and processing. As can be seen from Table 3, after the thickener of the invention is replaced, the suspension rate of the product is deteriorated, and the oil separation rate is increased, which shows that the product obtained by using the thickener of the invention in combination with organic bentonite, pretilachlor and metamifop has high suspension rate, low oil separation rate and stable quality.
Pretilachlor and metamifop compounded indoor formula screening test
1. Test conditions
1.1 test target: barnyard grass, moleplant seed, monochoria vaginalis and stranguria.
1.2 instrumentation
A climatic incubator, an electronic balance (measuring sensitivity is 0.1mg), a set of precision pipetting gun, a Potter spray tower, a beaker, a measuring cylinder and a plurality of plastic pots with holes.
1.3 Experimental Agents
Pretilachlor: 95.6% TC Jiangsu Fengshan group Ltd
Metamifop: 97% TC Jiangsu Union science and technology Co Ltd
Dissolving metamifop and pretilachlor in N, N-dimethylformamide respectively, and diluting with 0.1% Tween-80 aqueous solution to 1000ml to obtain mother liquor;
diluting the prepared metamifop mother liquor with 0.1% Tween-80 aqueous solution to respectively prepare into 20ga.i/hm2、30g a.i/hm2、40g a.i/hm2、50g a.i/hm2、60g a.i/hm2Five concentration gradients.
Diluting the prepared pretilachlor mother liquor with 0.1% Tween-80 aqueous solution to respectively prepare 50g of a.i/hm2、120g a.i/hm2、190g a.i/hm2、260g a.i/hm2、330g a.i/hm2Five concentration gradients.
10ml of solutions of each gradient of the two medicaments are respectively combined in pairs to form 25 solutions for standby.
1.4 test procedures
The test adopts sandy loam with organic matter content less than or equal to 3%, neutral pH value and good permeability, and the sandy loam is naturally air-dried, sieved and quantified to a pot 4/5, and the test is carried out in an artificial climate incubator, wherein the sunshine temperature is controlled at 29-30 ℃, the night temperature is 24-25 ℃ and the relative humidity is 75-85%. Soaking test seeds in warm water, shading with dark gauze, placing in a culture dish paved with sponge, soaking in water for accelerating germination, sowing after the seeds are exposed to the white, uniformly and quantitatively scattering pretreated weed seeds to be tested in soil, covering soil for 1.0cm, culturing in an incubator, thinning and fixing the seedlings after the weeds grow out, maintaining the density of the weeds at 20 strains/pot, and performing stem leaf spraying treatment by using a Potter spraying tower when the weeds grow to 2-4 true leaves. Repeating each treatment for 4 times, setting blank control, wherein the treatment amount of each pot is 2mL of liquid medicine, maintaining a 2cm water layer after treating for 24h, transferring into a phytotron incubator for culture, regularly observing the growth state and the damage symptoms of weeds after treating, investigating and recording the weeding activity by using a growth inhibition investigation method 14d after using the herbicide, and recording the fresh weight of the weeds.
1.5 data statistics and analysis:
absolute value survey method: e ═ C-T100/C
(E-fresh weight control effect (actual control effect), C-fresh weight of aerial parts of control weeds; T-fresh weight of aerial parts of treated weeds);
the Gowing method: e0＝X*Y(100-X)/100
X is the weed control effect when the dosage of the herbicide A is P;
y is weed control effect when the dosage of the herbicide B is Q;
E0the theoretical control effect when the dosage of the herbicide A is P + the theoretical control effect when the dosage of the herbicide B is Q;
e the practical control effect of the herbicide A and the herbicide B after being mixed according to the proportion.
E－E0The synergistic effect is more than 10 percent; E-E0The antagonism is less than-10 percent; E-E0Values within. + -. 10% are additive effects.
1.6 statistics of results
Fresh weight control effect investigation is carried out after the agents are treated for 14 days, and the results of indoor biological activity measurement of the tested agents and the combination thereof on barnyard grass, moleplant seed, monochoria vaginalis and stranguria are respectively shown in tables 4 to 7.
TABLE 4 oxazolesActual control effect E and theoretical control effect E of anilofos by using acylamide and pretilachlor in combination0Difference of (2)
TABLE 5 actual and theoretical control E of Euphorbia lathyris with metamifop and pretilachlor0Difference of (2)
TABLE 6 actual and theoretical control effects on monochoria vaginalis of a combination of metamifop and pretilachlor E0Difference of (2)
TABLE 7 actual and theoretical control effects E on stranguria with a mixture of metamifop and pretilachlor0Difference of (2)
As can be seen from tables 4 to 7, the combination of metamifop and pretilachlor in the application shows the addition effect overall (-10% < E-E)0< 10%) in the proportions defined in the present application namely pretilachlor: when the ratio of the metamifop to the metamifop is 2.4-4:1, the prevention effect is high, and an obvious addition effect is shown. In field experiments, the dosage of the herbicide to weeds in a direct seeding field of rice is 75-100 ml/mu, the control effect is more than 90%, and the effect is obvious.
In conclusion, the herbicide for the direct seeding field of paddy rice adopts pretilachlor and metamifop as effective components, pretilachlor is closed weeding and can effectively remove weeds before germination, and metamifop is post-emergence weeding, so that the herbicide has good effects on unearthed and unearthed weeds, and the weed control spectrum is expanded. The preferable mixture ratio is that pretilachlor: the metamifop is 2.4-4:1, and the dispersible oil suspending agent is prepared by matching with a safety agent, an emulsifier, a dispersant, a thickening agent and a dispersion medium, has high content of effective components, good stability, convenient storage, environmental protection and safety, has the dosage of 75-100 ml/mu of weeds in a rice direct seeding field, has the control effect of more than 90 percent, and has obvious effect.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (1)
1. The herbicide for the direct seeding field of rice is characterized by comprising the following raw materials in parts by weight: 30 parts OF pretilachlor, 10 parts OF metamifop, 7.5 parts OF fenclorim, OD-352015 parts, SP-OF3498D 3.5.5 parts, 2 parts OF organic bentonite and 32 parts OF methyl oleate;
the preparation method of the herbicide for the direct seeding field of rice comprises the following steps: adding pretilachlor, metamifop, fenclorim, OD-3520, SP-OF3498D, organic bentonite and methyl oleate into a container, transferring to a sand mill, adding a grinding medium, grinding uniformly, and finally separating the liquid medicine from the grinding medium to obtain the product.
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| CN115735933A (en) * | 2022-12-02 | 2023-03-07 | 安徽沙隆达生物科技有限公司 | Weeding composition containing metamifop, cyhalofop-butyl and pretilachlor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106577689A (en) * | 2016-10-31 | 2017-04-26 | 浙江天丰生物科学有限公司 | Ternary compound paddy field weeding composition |
| CN106973909A (en) * | 2017-04-13 | 2017-07-25 | 江苏莱科化学有限公司 | A kind of ternary built rice weeding composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106577689A (en) * | 2016-10-31 | 2017-04-26 | 浙江天丰生物科学有限公司 | Ternary compound paddy field weeding composition |
| CN106973909A (en) * | 2017-04-13 | 2017-07-25 | 江苏莱科化学有限公司 | A kind of ternary built rice weeding composition |
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