CN106135251B - Pretilachlor and bensulfuron methyl drop and preparation method thereof - Google Patents
Pretilachlor and bensulfuron methyl drop and preparation method thereof Download PDFInfo
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- CN106135251B CN106135251B CN201610599019.1A CN201610599019A CN106135251B CN 106135251 B CN106135251 B CN 106135251B CN 201610599019 A CN201610599019 A CN 201610599019A CN 106135251 B CN106135251 B CN 106135251B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to a pretilachlor and bensulfuron methyl dripping agent and a preparation method thereof, wherein the pretilachlor and bensulfuron methyl dripping agent comprises the following components in percentage by mass: 10-40% of pretilachlor, 1-4% of bensulfuron-methyl, 5-10% of fenclorim, 10-20% of emulsifier, 2-5% of dispersing agent, 0.5-2% of thickening agent, 0.1-0.5% of defoaming agent, 1-4% of pH regulator, 2-5% of water removing agent and the balance of oil-based solvent, wherein the preparation method comprises the following steps: adding pretilachlor crude oil, an emulsifier, a dispersing agent, a water removing agent, a thickening agent, a defoaming agent and a pH regulator into an oil-based solvent, mixing and stirring, adding a bensulfuron methyl original drug under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to a particle size D by a sand mill90Until the particle size is less than 5 mu m, the prophenyl dripping agent is prepared. The preparation has stable quality, particularly the degradation rate of the bensulfuron methyl before and after thermal storage is controlled within 10 percent, the water surface can automatically diffuse and automatically sink for emulsification, the aim of spreading is achieved, the closed weeding effect can be achieved, and the labor-saving effect can be achieved for farmers.
Description
Technical Field
The invention relates to a paddy field broadcasting type closed soil herbicide and a preparation method thereof, in particular to pretilachlor and bensulfuron methyl dripping agent and a preparation method thereof.
Background
Pretilachlor, other chinese names: swept-ford (Sofit);
chemical name: 2-chloro-N- (1-methyl-2-methoxyethyl) -N- (2-ethyl-6-methylphenyl) acetamide;
structural formula (xvi):
CA accession number: 51218-49-6; agricultural chemicalThe medicine category: a herbicide; the chemical properties are as follows: the pure product is colorless liquid. P.135 ℃/0.1Pa, relative density 1.076(20 ℃), vapor pressure 0.133X 10-3 Pa. Is easily soluble in most organic solvents, has a solubility in water of 50mg/L at 20 ℃ and a partition coefficient (n-octanol/water) of 12020. Is stable when stored for 2 years at normal temperature. Hydrolysis half-life period at 20 ℃ is 200d (pH is 1-9), 14d (pH is 13), and half-life period in soil is 20-50 d.
The function characteristics are as follows: the product is a pre-emergence herbicide, and is mainly used for preventing and killing gramineous weeds. The product belongs to 2-acetanilide chloride herbicide, is a cell division inhibitor, and can be used for preventing and killing barnyard grass, cyperus heterophyllus, felt of cattle, monochoria vaginalis, alisma angustifolia and the like in a rice field in soil treatment.
Bensulfuron, other chinese names: time to harvest (Londax); chemical name methyl 2- (((4, 6-dimethoxypyrimidin-2-yl) aminocarboxylic acid amino) sulfonylmethyl) benzoate;
structural formula (xvi):
CA accession number: 83055-99-6
Pesticide categories: a herbicide; the chemical properties are as follows: the pure product is white odorless solid with a vapor pressure of 1.733 x 10-3Pa (20 ℃) at a temperature of m.p.185-188 ℃. The solubility is 11720mg/L of dichloromethane, 5380mg/L of acetonitrile, 280mg/L of xylene, 1660mg/L of ethyl acetate, 1380mg/L of acetone, 990mg/L of methanol, 3.1mg/L of hexane and 1200mg/L of water. The partition coefficient was 4.1. Stable in slightly basic (pH 8) aqueous solution and slowly decomposed in acidic solution. The half-life at pH 5 was 11d and at pH 7 was 143 d. The original drug is slightly yellowish.
The function characteristics are as follows: is a selective systemic conductive herbicide. The pesticide can diffuse in water rapidly, and can be absorbed by weed root and leaf and transferred to other parts to inhibit branched chain amino acid biosynthesis. The growth function of the sensitive weeds is hindered, young tissues are yellowed early, and the growth of leaves and roots is inhibited. Can effectively prevent and control annual and perennial broadleaf weeds and nutgrass flatsedge in the rice field, and can be absorbed by the roots and leaves of the weeds and transferred to other parts. Is safe to rice and has flexible use method. The herbicide is suitable for preventing and killing annual and perennial broadleaf weeds and nutgrass flatsedge in paddy fields, is applied after the crops sprout and before and after the weeds sprout, and has good effect on monochoria vaginalis, eyeweed, jie herb and the like and sedge weeds (such as eleusine indica, abnormal sedge, juncellus hydropiper and the like).
The bensulfuron methyl original drug in the existing pretilachlor and bensulfuron methyl wettable powder has poor heat storage stability, the decomposition rate is as high as 30 percent, the closed weeding effect is influenced, the drop scattering agent is a pesticide preparation with great development prospect, the performance is stable, the adhesiveness is good, the labor and the time are saved, the obvious prevention effect can be obtained by one-time use, and the drug cost and the environmental pollution are reduced. Therefore, the application provides a solution for preparing the pretilachlor and the bensulfuron methyl into the drop-sprinkling agent.
Disclosure of Invention
In order to solve the technical problems, the technical solution adopted by the invention is as follows:
the invention provides a pretilachlor and bensulfuron methyl dripping agent which comprises the following components in percentage by weight: 10-40% of pretilachlor, 1-4% of bensulfuron-methyl, and fenclorim: 5-10% of emulsifier, 10-20% of dispersing agent, 2-5% of thickening agent, 0.5-2% of defoaming agent, 1-4% of pH regulator and water removing agent: 2-5% and the balance of an oil-based solvent.
Preferably, the dropping agent is prepared from the following components in percentage by weight: pretilachlor 30.5%, bensulfuron-methyl 2.5%, fenclorim 7.5%, emulsifier 15%, dispersing agent 3%, thickening agent 1.2%, defoaming agent 0.3%, pH regulator 2%, and water-removing agent: 3.5 percent, and the balance being oil-based solvent.
The emulsifier is one or more of alkylphenol polyoxyethylene, sorbitan monolaurate, sodium alkylphenol polyoxyethylene sulfate and polyoxyethylene fatty acid phosphate.
The dispersing agent is one or more of fatty alcohol-polyoxyethylene ether, calcium dodecyl benzene sulfonate, alkyl succinic acid ester sodium sulfonate and fatty alcohol sulfate.
The thickener is one or more of organic bentonite, xanthan gum and gas-phase silicon dioxide.
The defoaming agent is any one of polyether and organic silicon.
The pH regulator is any one of light calcium, caustic soda flakes, lignin and triethanolamine.
The water removing agent is any one of anhydrous magnesium sulfate, anhydrous sodium carbonate and anhydrous sodium sulfate.
The oil-based solvent is one or more of methyl oleate, soybean oil and rosin-based vegetable oil.
A preparation method of pretilachlor and bensulfuron methyl dripping agent comprises the following steps: adding an emulsifier, a dispersing agent, a pretilachlor technical, a thickening agent, a defoaming agent, a pH regulator and a water removal agent in a formula amount into an oil-based solvent, mixing and stirring, adding bensulfuron-methyl in a formula amount under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to a particle size D by a sand mill90Until the size is less than 5 mu m, the pretilachlor and bensulfuron methyl dripping agent is prepared.
The invention has the beneficial effects that: the pretilachlor and the bensulfuron methyl dripping agent prepared by the method have stable quality, and particularly the degradation rate of the bensulfuron methyl in the preparation before and after thermal storage is controlled within 10 percent; the preparation can automatically diffuse and emulsify on the water surface after entering water, achieves the aim of spreading, can play a role in high-efficiency closed weeding, and can lead a user to achieve the effect of saving labor.
Detailed Description
The invention will be further illustrated with reference to specific examples:
example 1:
333.5g of soybean oil is added into a shearing kettle, 312.5g of pretilachlor original drug with the purity of 96 percent, 78 g of fenclorim, 150g of alkylphenol polyoxyethylene ether serving as an emulsifier, 30g of fatty alcohol polyoxyethylene ether serving as a dispersing agent, 10g of organic bentonite serving as a thickening agent, 2g of defoaming agent polyether, 30g of light calcium carbonate serving as a pH regulator and 30g of anhydrous magnesium sulfate serving as a water removing agent are added, the materials are mixed and stirred, 24g of bensulfuron-methyl with the purity of 98 percent is added under the stirring of the rotating speed of 1500-10000 r/min by a high-speed shearing machine, the mixture is sheared for 10-40 min, and the mixture is ground to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 2:
adding 534.3g of methyl oleate into a shearing kettle, then adding 104.2g of pretilachlor original drug with the purity of 96%, 50g of fenclorim, 200g of emulsifier sorbitan monolaurate, 50g of calcium dodecyl benzene sulfonate as a dispersing agent, 20g of organic bentonite as a thickening agent, 1g of organic silicon as a defoaming agent, 10g of pH regulator flake alkali and 20g of anhydrous sodium carbonate as a water removing agent, mixing and stirring, adding 10.5g of bensulfuron-methyl with the purity of 98% under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 3:
adding 397.4g of methyl oleate into a shearing kettle, then adding 208.3g of pretilachlor original drug with the purity of 96%, 52 g of fenclorim, 200g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 40g of diffusant sodium alkyl succinate sulfonate, 5g of thickener xanthan gum, 2g of defoaming agent organosilicon, 30g of pH regulator lignin and 50g of anhydrous sodium sulfate of water removing agent, mixing and stirring, adding 15.3g of bensulfuron-methyl with the purity of 98% under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 4:
adding 145.2g of methyl oleate into a shearing kettle, then adding 400g of pretilachlor original drug with the purity of 96 percent, 100g of fenclorim, 200g of emulsifier fatty acid polyoxyethylene ester phosphate, 40g of diffusant fatty alcohol sulfate, 10g of thickening agent fumed silica, 4g of defoaming agent, 30g of pH regulator triethanolamine and 30g of anhydrous magnesium sulfate serving as a water removing agent, mixing and stirring, adding 40.8g of bensulfuron-methyl with the purity of 98 percent under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 5:
258.3g of rosin-based vegetable oil is added into a shearing kettle, and then propyl with the purity of 96 percent is added365g of oxamine original drug, 92g of fenclorim, 150g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 30g of sodium alkyl succinate dispersant, 5g of thickener organic bentonite, 4g of organosilicone defoaming agent, 30g of pH regulator light calcium and 30g of anhydrous magnesium sulfate as a water removing agent, mixing and stirring, adding 35.7g of bensulfuron methyl with the purity of 98% under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 6:
353.8g of methyl oleate is added into a shearing kettle, 317.7g of pretilachlor original drug with the purity of 96 percent, 78 g of fenclorim, 100g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 50g of diffusant sodium alkyl succinate sulfonate, 10g of thickener organobentonite, 5g of defoaming agent, 30g of pH regulator light calcium and 30g of anhydrous magnesium sulfate serving as a water removing agent are added, the materials are mixed and stirred, 25.5g of bensulfuron methyl with the purity of 98 percent is added under the stirring of a high-speed shearing machine at the rotating speed of 1500 to 10000 revolutions per minute, the mixture is sheared for 10 to 40 minutes, and the mixture is ground to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 7:
589.4g of methyl oleate is added into a shearing kettle, 104.2g of pretilachlor raw pesticide with the purity of 96 percent, 52 g of fenclorim, 150g of alkylphenol polyoxyethylene ether sodium sulfate as emulsifier, 20g of sodium alkyl succinate sulfonate as dispersing agent, 20g of organic bentonite as thickening agent, 4g of organic silicon as defoaming agent, 20g of light calcium as pH regulator and 20g of anhydrous magnesium sulfate as water removing agent are added into the shearing kettle, the mixture is mixed and stirred, 20.4g of bensulfuron methyl with the purity of 98 percent is added into the mixture under the stirring of the rotating speed of 1500 to 10000 revolutions per minute of a high-speed shearing machine, the shearing is carried out for 10 to 40 minutes, and the mixture is ground into the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 8:
439.1g of methyl oleate is added into a shearing kettle, 208.3g of pretilachlor original drug with the purity of 96 percent, 52 g of fenclorim, 150g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate and dispersing agent are added40g of alkyl succinic acid ester sodium sulfonate, 15g of thickening agent organic bentonite, 5g of defoaming agent, 20g of pH regulator light calcium and 40g of anhydrous magnesium sulfate as a water removing agent, mixing and stirring, adding 30.6g of raw pesticide with 98 percent of bensulfuron methyl under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding by a sand mill to the particle size D90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 9:
adding 161.2g of methyl oleate into a shearing kettle, then adding 400g of pretilachlor original drug with the purity of 96%, 100g of fenclorim, 150g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 50g of dispersing agent alkyl succinic acid ester sodium sulfonate, 5g of thickening agent organic bentonite, 3g of defoaming agent organosilicon, 40g of pH regulator light calcium and 50g of anhydrous magnesium sulfate serving as a water removing agent, mixing and stirring, adding 40.8g of bensulfuron-methyl with the purity of 98% under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
Example 10:
263.9g of methyl oleate is added into a shearing kettle, 364.6g of pretilachlor original drug with the purity of 96 percent, 92g of fenclorim, 150g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 30g of diffusant alkyl succinic acid ester sodium sulfonate, 10g of thickener organobentonite, 4g of defoaming agent, 30g of pH regulator light calcium and 30g of anhydrous magnesium sulfate serving as a water removing agent are added, the materials are mixed and stirred, 25.5g of bensulfuron methyl with the purity of 98 percent is added under the stirring of the rotating speed of 1500 to 10000 revolutions per minute of a high-speed shearing machine, the mixture is sheared for 10 to 40 minutes, and the mixture is ground to the particle size D by a sand mill90Less than 5 microns, and the off-white pretilachlor and bensulfuron methyl dripping agent is prepared.
The technical specifications of pretilachlor and bensulfuron-methyl drip-feed according to the invention are shown in Table 1, and the products of examples 9 and 10 are used as examples.
TABLE 1 technical indices of pretilachlor and bensulfuron-methyl drip-sprinkling agent
Note: 1. method for determining pH value of GB/T1601-1993 pesticide
2. Method for measuring suspension rate of GB/T14825-2006 pesticide
3. GB/T28137-2011 pesticide lasting foamability determination method
4. Method for measuring pourability of CIPAC handbook J volume MT148.1 suspension preparation
5. Method for measuring dispersion stability of CIPAC manual H roll MT180 suspoemulsion
6. GB/T19136-2003 pesticide heat storage stability determination method
7. Method for determining low-temperature stability of GB/T19137-2003 pesticide
The control data of pretilachlor and bensulfuron methyl dripping agent of the invention on weed soil sealing in rice direct seeding field are shown in table 2, taking the products of examples 9 and 10 as examples, and taking commercial 30% pretilachlor EC and 10% bensulfuron methyl WP as controls.
Table 2 pretilachlor and bensulfuron methyl anti-drip agent control data of the present invention
Except that the quality index of the preparation prepared by the invention reaches the quality standard of the dropping agent, particularly the decomposition rate of the bensulfuron methyl as the effective component is better controlled, and the decomposition rate can be controlled within 10 percent after thermal storage, taking the products of examples 9 and 10 as examples, and taking 40 percent pretilachlor-bensulfuron methyl WP as a comparison, the result is shown in Table 3.
TABLE 3 pretilachlor and bensulfuron methyl in accordance with the invention data on heat storage stability
Meanwhile, the pretilachlor and bensulfuron-methyl dripping agent disclosed by the invention is proved by field experiments in direct-seeding paddy fields that the water surface diffusion and the emulsifying performance of the preparation can meet the requirements of dripping, the pretilachlor and bensulfuron-methyl dripping agent can be rapidly diffused on the water surface and can slowly sink to be combined with soil, and the effects of saving labor and force and efficiently sealing and weeding can be achieved.
Claims (2)
1. The pretilachlor and bensulfuron methyl dripping agent is characterized in that: the drop is prepared from the following components: 364.6g of pretilachlor raw drug with the purity of 96 percent, 25.5g of bensulfuron methyl raw drug with the purity of 98 percent, 92g of fenclorim, 150g of alkylphenol polyoxyethylene ether sodium sulfate as emulsifier, 30g of alkyl succinate sodium sulfonate as diffusant, 10g of organic bentonite as thickener, 4g of organosilicon defoamer, 30g of light calcium as pH regulator, 30g of anhydrous magnesium sulfate as dehydrator and 263.9g of methyl oleate.
2. A method for preparing pretilachlor and bensulfuron methyl drop as claimed in claim 1, which is characterized by comprising the following steps: adding an emulsifier, a dispersing agent, a pretilachlor technical, a thickening agent, a defoaming agent, a pH regulator and a water removing agent in a formula amount into an oil-based solvent, mixing and stirring, adding bensulfuron methyl in the formula amount under the stirring of a high-speed shearing machine at the rotating speed of 1500-10000 r/min, shearing for 10-40 min, and grinding by a sand mill until the particle size D90 is less than 5 mu m to obtain the pretilachlor and the bensulfuron methyl drop.
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| CN2208795Y (en) * | 1994-07-30 | 1995-10-04 | 屠予钦 | Hand farm chemical spreader |
| EP1313369B1 (en) * | 2000-08-25 | 2005-06-29 | Basf Aktiengesellschaft | Herbicidal mixtures |
| CN1349736A (en) * | 2001-10-22 | 2002-05-22 | 徐克华 | Mixed herbicide for wet direct-seeding rice field |
| CN103621508B (en) * | 2013-11-08 | 2015-11-18 | 美丰农化有限公司 | Two careless ether dispersibles oil-suspending agent and preparation method thereof |
| CN105010373A (en) * | 2015-07-13 | 2015-11-04 | 上海祥霖农业技术有限公司 | Application method of paddy rice water direct-sowing field harrowing scatter-type pre-emergence sealing herbicide |
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