Dispersible oil suspending agent and application thereof

Abstract

The invention relates to a dispersible oil suspending agent and application thereof, the dispersible oil suspending agent comprises glyphosate, a growth regulator, an emulsifier, a dispersant, a thickener and a dispersion medium, the growth regulator is forchlorfenuron, 6-benzylaminopurine and compound nitrophenolate sodium, and the mass ratio of forchlorfenuron to 6-benzylaminopurine to compound nitrophenolate sodium is 1: (0.6-1.2): (6-20). By adding the growth regulator into the glyphosate dispersible oil suspending agent and optimizing the components and dosage of the growth regulator, the weeding effect of the glyphosate dispersible oil suspending agent under the low-temperature condition is greatly improved, and the weed death time of glyphosate is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, and in particular to a dispersible oil suspension and application thereof. Background Art

[0002] Glyphosate is a lethal herbicide. If applied to soybean and corn fields, it will kill weeds and crops together. Therefore, it is widely used for weed control in non-arable land. Through genetic modification, soybeans and corn can be made resistant to glyphosate, becoming genetically modified soybeans and genetically modified corn. Glyphosate can be directly applied to genetically modified soybean and genetically modified corn fields without killing the crops.

[0003] The opening of genetically modified crops also brings some risks, such as excessive glyphosate in crops, reduced photosynthesis and nutrient absorption of soybeans, and accelerated development of weed resistance. In actual use, the best weed control period for genetically modified soybeans is the 2-3 leaf stage after soybean seedlings, and the 2-4 leaf stage for weeds; the best weed control period for genetically modified corn is the 3-5 leaf stage, and the 2-4 leaf stage for weeds. During this growth period, the ambient temperature is still relatively low, usually between 15 and 20°C. However, weeds grow slowly in low temperature seasons, and their ability to absorb herbicides is reduced. Glyphosate is a high-temperature herbicide, so it will die slowly and have poor weed killing activity under low temperature conditions. Even after the weeds show symptoms of poisoning, they will turn green again when it rains. Therefore, it is of great significance to develop a glyphosate formulation suitable for genetically modified crops under the new situation.

[0004] The main formulations of glyphosate include soluble granules, aqueous solutions and oil suspensions. Oil suspensions have high efficacy and can effectively alleviate resistance, but the existing glyphosate oil suspensions cannot solve the problem of improving low-temperature efficacy. At present, the methods for improving the low-temperature efficacy of glyphosate include: ① Adding adjuvants, adding adjuvants such as silicone and tallow amine polyoxyethylene ether to glyphosate, which is conducive to the solution dissolving the wax layer of the epidermis of weed stems and leaves, improving the penetration ability of the solution to weed stems and leaves, and increasing the weed mortality rate, but this method cannot solve the problem of slow weed death. ② Increase the dosage, one is to increase the effective dosage per mu by using high-content glyphosate; the other is to increase the glyphosate dosage to increase the effective dosage per mu, but it is easy to cause drug damage and resistance problems. ③ Mixing of agents, mixing with herbicides with different mechanisms, such as glyphosate acid and dimethyl glyphosate, which are more common on the market, although they have higher herbicidal activity at low temperatures, they have a longer residual time and pose a residual risk to crops. Summary of the invention

[0005] The purpose of the present invention is to provide a glyphosate dispersible oil suspension suitable for genetically modified crops.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A dispersible oil suspension comprises glyphosate, a growth regulator, an emulsifier, a dispersant, a thickener and a dispersion medium. The growth regulator is chlorfenapyr, 6-benzylaminopurine and sodium nitrophenolate. The mass ratio of chlorfenapyr, 6-benzylaminopurine and sodium nitrophenolate is 1: (0.6-1.2): (6-20).

[0008] Growth regulators can regulate the growth and development of plants and the conduction of substances in the body. By mixing them with herbicides, they can promote the conduction of herbicides in weeds and improve the weed control effect. However, improper use of growth regulators may also show antagonistic effects. The applicant creatively added growth regulators to glyphosate dispersible oil suspensions, and by optimizing the components and dosage of growth regulators, greatly improved the weed control effect of glyphosate dispersible oil suspensions under low temperature conditions and shortened the weed killing time of glyphosate.

[0009] Preferably, the growth regulator accounts for 3-6% of the total mass of the dispersible oil suspension, and more preferably 4-6%.

[0010] In some embodiments, the forchlorfenuron accounts for 0.25-0.5% of the total mass of the dispersible oil suspension concentrate.

[0011] In some embodiments, the 6-benzylaminopurine accounts for 0.1-0.5% of the total mass of the dispersible oil suspension.

[0012] In some embodiments, the sodium complex nitrophenolate accounts for 4-5% of the total mass of the dispersible oil suspension.

[0013] Preferably, the emulsifier is selected from one or more of hydroxy polyethylene oxide block copolymers, anhydrous calcium salt of linear calcium dodecylbenzene sulfonate alkane solution, sorbitan fatty acid esters, castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether, cardanol polyoxyethylene ether, fatty acid methyl ester ethoxylate, fatty amine polyoxyethylene ether, block polyether, polyether polyol, and hydroxy polyethylene oxide block copolymer.

[0014] Further preferably, the emulsifier accounts for 10-20% of the total mass of the dispersible oil suspension, further preferably 12-18%, and further preferably 14-16%.

[0015] In some embodiments, the emulsifier is anhydrous calcium salt of linear calcium dodecylbenzene sulfonate alkane solution, castor oil polyoxyethylene ether, isomeric fatty alcohol polyoxyethylene ether and hydroxy polyethylene oxide block copolymer.

[0016] Furthermore, the anhydrous calcium salt of the linear dodecylbenzene calcium sulfonate alkane solution accounts for 3-5% of the total mass of the dispersible oil suspension; the castor oil polyoxyethylene ether accounts for 3-5% of the total mass of the dispersible oil suspension; the isomerized fatty alcohol polyoxyethylene ether accounts for 5-7% of the total mass of the dispersible oil suspension; and the hydroxy polyethylene oxide block copolymer accounts for 0.5-1.5% of the total mass of the dispersible oil suspension.

[0017] In some embodiments, the emulsifier is sorbitan fatty acid ester, castor oil polyoxyethylene ether and fatty acid methyl ester ethoxylate.

[0018] Furthermore, the sorbitan fatty acid ester accounts for 3-5% of the total mass of the dispersible oil suspension; the castor oil polyoxyethylene ether accounts for 6-8% of the total mass of the dispersible oil suspension; and the fatty acid methyl ester ethoxylate accounts for 3-5% of the total mass of the dispersible oil suspension.

[0019] Preferably, the dispersant is selected from one or more of a sodium lignin sulfonate dispersant, a nonionic polymer condensation product, and a polycarboxylate dispersant.

[0020] Preferably, the dispersant accounts for 1 to 5% of the total mass of the dispersible oil suspension, more preferably 1 to 3%, and even more preferably 1.5 to 2.5%.

[0021] Preferably, the thickener is selected from one or more of modified organic bentonite, xanthan gum, magnesium aluminum silicate, and white carbon black.

[0022] Preferably, the thickener accounts for 0.2-5% of the total mass of the dispersible oil suspension, more preferably 0.5-4%, and even more preferably 1-2%.

[0023] In some embodiments, the thickener is modified organic bentonite and white carbon black.

[0024] Furthermore, the modified organic bentonite accounts for 0.5-1.5% of the total mass of the dispersible oil suspension, and the white carbon black accounts for 0.2-1% of the total mass of the dispersible oil suspension.

[0025] In some embodiments, the method for preparing the modified organobentonite comprises the following steps:

[0026] Step 1, mixing organic bentonite and diatomaceous earth to form a first mixture;

[0027] Step 2, mixing urea and sodium alginate and dissolving them in deionized water to prepare a functional additive solution to obtain a second mixture;

[0028] Step 3, mixing the first mixture with the second mixture, drying, grinding, crushing, and sieving to obtain a third mixture;

[0029] Step 4: mixing the fatty acid methyl ester with an anionic surfactant and a nonionic surface modifier to obtain a fourth mixture;

[0030] Step 5: Atomize the fourth mixture, spray it evenly onto the third mixture, stir it to make the fourth mixture evenly dispersed and infiltrated into the third mixture, and obtain modified organic bentonite.

[0031] Further, based on the total mass of the modified organic bentonite as 100%, it includes the following components: 85-95% organic bentonite; 1-5% diatomite; 2-10% surface modifier; 0.5-2% functional additive, the surface modifier includes fatty acid ester, nonionic surfactant and anionic surfactant, the mass ratio of the fatty acid ester, nonionic surfactant and anionic surfactant is (3-6): (0.5-2): (1-3), the functional additive is urea and sodium alginate, the mass ratio of urea to sodium alginate is (0.5-1): (1-5). For details, please refer to patent CN 117770240A, which will not be described in detail herein.

[0032] Preferably, the dispersion medium is grease. The grease used in the present invention is a vegetable oil derivative, has good high temperature safety, and can effectively improve the performance of rainwater erosion resistance and evaporation drift resistance.

[0033] Preferably, the dispersion medium accounts for 40-60% of the total mass of the dispersible oil suspension, for example 40%, 45%, 50%, 55%, 60%.

[0034] Preferably, the dispersion medium is selected from one or more of fatty acid methyl ester, fatty acid ethyl ester, tri-epoxy fatty acid ester, trioctyl trimellitate, epoxyglycerol tricarboxylate, chloromethoxy fatty acid ester and vegetable oil.

[0035] Preferably, based on the total mass of the dispersible oil suspension as 100%, the dispersible oil suspension comprises the following components:

[0036] Glyphosate 20-30%;

[0037] Growth regulator 3-6%;

[0038] Emulsifier 10-20%;

[0039] Dispersant 1-5%;

[0040] Thickener 0.2-5%;

[0041] Dispersion medium, replenishment.

[0042] In some preferred embodiments, based on the total mass of the dispersible oil suspension as 100%, the dispersible oil suspension comprises the following components:

[0043] Glyphosate 20-30%;

[0044] Chlorfenapyr 0.25-0.5%;

[0045] 6-Benzylaminopurine 0.1-0.5%;

[0046] Sodium nitrophenolate 4-5%;

[0047] Linear dodecylbenzene sulfonate calcium alkane solution anhydrous calcium salt 3-5%;

[0048] Castor oil polyoxyethylene ether 3-5%;

[0049] Isomeric fatty alcohol polyoxyethylene ether 5-7%;

[0050] Hydroxylated polyethylene oxide block copolymer 0.5-1.5%;

[0051] Polycarboxylate 1-3%;

[0052] White carbon black 0.2-1%;

[0053] Modified organic bentonite 0.5-1.5%;

[0054] Fatty acid methyl esters and / or fatty acid ethyl esters are used as supplement.

[0055] In some preferred embodiments, based on the total mass of the dispersible oil suspension as 100%, the dispersible oil suspension comprises the following components:

[0056] Glyphosate 20-30%;

[0057] Chlorfenapyr 0.25-0.5%;

[0058] 6-Benzylaminopurine 0.1-0.5%;

[0059] Sodium nitrophenolate 4-5%;

[0060] Sorbitan fatty acid ester 3-5%;

[0061] Castor oil polyoxyethylene ether 6-8%;

[0062] Fatty acid methyl ester ethoxylate 3-5%;

[0063] Polycarboxylate 1-3%;

[0064] White carbon black 0.2-1%;

[0065] Modified organic bentonite 0.5-1.5%;

[0066] Fatty acid methyl esters and / or fatty acid ethyl esters are used as supplement.

[0067] The invention also provides application of the dispersible oil suspension in transgenic crops.

[0068] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0069] The invention adds a growth regulator to the glyphosate dispersible oil suspension and optimizes the components and dosage of the growth regulator, thereby greatly improving the weed control effect of the glyphosate dispersible oil suspension under low temperature conditions, shortening the glyphosate weed killing time, and the growth regulator can also promote crop growth and avoid a reduction in crop yield.

[0070] The dispersible oil suspension of the invention has good stability and strong versatility. DETAILED DESCRIPTION

[0071] The present invention is further described below in conjunction with the examples. However, the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the different requirements of specific use, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0072] Unless otherwise specified, the reagents used in the following examples and comparative examples are all commercially available products or can be prepared by referring to existing preparation methods. Among them, isomeric fatty alcohol polyoxyethylene ether was purchased from Hai'an Petrochemical Plant, Jiangsu Province, with the brand name E-1005;

[0073] Hydroxylated polyethylene oxide block copolymer was purchased from Nanjing Jierun Technology Co., Ltd., with the brand name NS-500LQ;

[0074] Linear dodecylbenzene sulfonate calcium alkane solution anhydrous calcium salt was purchased from Nantong Deyi Chemical Co., Ltd., 500#;

[0075] Castor oil polyoxyethylene ether was purchased from Hai'an Petrochemical Plant, Jiangsu Province, with the brand name EL-10;

[0076] Polycarboxylate was purchased from Jiangsu Qingyu Chemical Technology Co., Ltd., brand name SP-OF3472B;

[0077] Methyl oleate was purchased from Suzhou Fengbei Biotechnology Co., Ltd.;

[0078] Ethyl oleate was purchased from Suzhou Fengbei Biotechnology Co., Ltd.;

[0079] Vegetable oil was purchased from Suzhou Fengbei Biotechnology Co., Ltd.;

[0080] Sorbitan fatty acid esters were purchased from Haian Petrochemical Plant, Jiangsu Province, with the brand name S-80;

[0081] Fatty acid methyl ester ethoxylate was purchased from Oak Chemical with the brand name P816;

[0082] The modified organic bentonite was prepared by referring to the preparation method of Example 1 of patent CN 117770240 A.

[0083] Unless otherwise specified, the preparation method of the glyphosate dispersible oil suspension concentrate hereinafter includes:

[0084] ① Weigh the dispersion medium, emulsifier and dispersant according to mass percentage into the reaction kettle, stir and mix, and disperse evenly;

[0085] ②Add thickener and continue stirring evenly;

[0086] ③ Add the original drug and growth regulator, homogenize with a homogenizer for 20 minutes, then use a sand mill to grind to a particle size of 2-4μm to obtain a dispersible oil suspension.

[0087] Example 1

[0088] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0089] glyphosate, 27%;

[0090] forchlorfenapyr, 0.5%;

[0091] 6-benzylaminopurine, 0.3%;

[0092] Sodium nitrophenolate, 4%;

[0093] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0094] Castor oil polyoxyethylene ether, 4%;

[0095] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0096] Hydroxylated polyethylene oxide block copolymer, 1%;

[0097] polycarboxylates, 2%;

[0098] White carbon black, 0.5%;

[0099] modified organobentonite, 1%;

[0100] Methyl oleate, make up 100%.

[0101] Example 2

[0102] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0103] glyphosate, 27%;

[0104] forchlorfenapyr, 0.25%;

[0105] 6-benzylaminopurine, 0.3%;

[0106] Sodium nitrophenolate, 5%;

[0107] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0108] Castor oil polyoxyethylene ether, 4%;

[0109] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0110] Hydroxylated polyethylene oxide block copolymer, 1%;

[0111] polycarboxylates, 2%;

[0112] White carbon black, 0.5%;

[0113] modified organobentonite, 1%;

[0114] Methyl oleate, make up 100%.

[0115] Example 3

[0116] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0117] glyphosate, 27%;

[0118] forchlorfenapyr, 0.5%;

[0119] 6-benzylaminopurine, 0.3%;

[0120] Sodium nitrophenolate, 4%;

[0121] Sorbitan fatty acid esters, 4%;

[0122] Castor oil polyoxyethylene ether, 7%;

[0123] fatty acid methyl ester ethoxylate, 4%;

[0124] polycarboxylates, 2%;

[0125] White carbon black, 0.5%;

[0126] modified organobentonite, 1%;

[0127] Vegetable oil, make up 100%.

[0128] Example 4

[0129] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0130] glyphosate, 27%;

[0131] forchlorfenapyr, 0.5%;

[0132] 6-benzylaminopurine, 0.3%;

[0133] Sodium nitrophenolate, 4%;

[0134] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0135] Castor oil polyoxyethylene ether, 4%;

[0136] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0137] Hydroxylated polyethylene oxide block copolymer, 1%;

[0138] polycarboxylates, 2%;

[0139] White carbon black, 0.5%;

[0140] modified organobentonite, 1%;

[0141] methyl oleate, 30%;

[0142] Ethyl oleate, make up 100%.

[0143] Comparative Example 1

[0144] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0145] glyphosate, 27%;

[0146] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0147] Castor oil polyoxyethylene ether, 4%;

[0148] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0149] Hydroxylated polyethylene oxide block copolymer, 1%;

[0150] polycarboxylates, 2%;

[0151] White carbon black, 0.5%;

[0152] modified organobentonite, 1%;

[0153] Methyl oleate, make up 100%.

[0154] Comparative Example 2

[0155] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0156] glyphosate, 27%;

[0157] forchlorfenapyr, 1%;

[0158] 6-Benzylaminopurine, 0.5%;

[0159] Sodium nitrophenolate, 5%;

[0160] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0161] Castor oil polyoxyethylene ether, 4%;

[0162] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0163] Hydroxylated polyethylene oxide block copolymer, 1%;

[0164] polycarboxylates, 2%;

[0165] White carbon black, 0.5%;

[0166] modified organobentonite, 1%;

[0167] Methyl oleate, make up 100%.

[0168] Comparative Example 3

[0169] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0170] glyphosate ammonium, 27%;

[0171] forchlorfenapyr, 0.5%;

[0172] 6-benzylaminopurine, 0.3%;

[0173] Sodium nitrophenolate, 4%;

[0174] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0175] Castor oil polyoxyethylene ether, 4%;

[0176] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0177] Hydroxylated polyethylene oxide block copolymer, 1%;

[0178] polycarboxylates, 2%;

[0179] White carbon black, 0.5%;

[0180] modified organobentonite, 1%;

[0181] Methyl oleate, make up 100%.

[0182] Comparative Example 4

[0183] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0184] glyphosate, 27%;

[0185] forchlorfenapyr, 0.5%;

[0186] 6-benzylaminopurine, 0.3%;

[0187] Sodium nitrophenolate, 4%;

[0188] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0189] Castor oil polyoxyethylene ether, 4%;

[0190] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0191] Hydroxylated polyethylene oxide block copolymer, 1%;

[0192] polycarboxylates, 2%;

[0193] White carbon black, 0.5%;

[0194] Organobentonite, 1%;

[0195] Methyl oleate, make up 100%.

[0196] Comparative Example 5

[0197] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0198] glyphosate, 27%;

[0199] 6-benzylaminopurine, 0.3%;

[0200] Sodium nitrophenolate, 4%;

[0201] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0202] Castor oil polyoxyethylene ether, 4%;

[0203] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0204] Hydroxylated polyethylene oxide block copolymer, 1%;

[0205] polycarboxylates, 2%;

[0206] White carbon black, 0.5%;

[0207] modified organobentonite, 1%;

[0208] Methyl oleate, make up 100%.

[0209] Comparative Example 6

[0210] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0211] glyphosate, 27%;

[0212] forchlorfenapyr, 0.5%;

[0213] Sodium nitrophenolate, 4%;

[0214] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0215] Castor oil polyoxyethylene ether, 4%;

[0216] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0217] Hydroxylated polyethylene oxide block copolymer, 1%;

[0218] polycarboxylates, 2%;

[0219] White carbon black, 0.5%;

[0220] modified organobentonite, 1%;

[0221] Methyl oleate, make up 100%.

[0222] Comparative Example 7

[0223] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0224] glyphosate, 27%;

[0225] forchlorfenapyr, 0.5%;

[0226] 6-benzylaminopurine, 0.3%;

[0227] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0228] Castor oil polyoxyethylene ether, 4%;

[0229] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0230] Hydroxylated polyethylene oxide block copolymer, 1%;

[0231] polycarboxylates, 2%;

[0232] White carbon black, 0.5%;

[0233] modified organobentonite, 1%;

[0234] Methyl oleate, make up 100%.

[0235] Comparative Example 8

[0236] A glyphosate dispersible oil suspension for genetically modified crops, based on the total mass of the glyphosate dispersible oil suspension as 100%, comprising:

[0237] glyphosate, 30%;

[0238] Calcium dodecylbenzenesulfonate linear alkane solution anhydrous calcium salt, 4%;

[0239] Castor oil polyoxyethylene ether, 4%;

[0240] Isomeric fatty alcohol polyoxyethylene ether, 6%;

[0241] Hydroxylated polyethylene oxide block copolymer, 1%;

[0242] polycarboxylates, 2%;

[0243] White carbon black, 0.5%;

[0244] Modified organic bentonite, 0.5%;

[0245] Fatty acid methyl esters, make up 100%.

[0246] Performance Test:

[0247] 1. Physical stability test

[0248] Cold storage stability test: After sealing, the sample is placed at a constant temperature of 0℃ for 7 days and then taken out. If it can flow after being placed at room temperature and has no paste-like bottom, it is qualified.

[0249] Thermal storage stability test: After the sample is sealed, it is placed at a constant temperature of 54°C for 14 days. It can flow after being placed at room temperature without paste formation; the oil separation rate is less than 10%; the original drug decomposition rate is less than or equal to 5, which is qualified.

[0250] Room temperature stability test: After the sample is sealed, it is placed at a constant temperature of 25°C for 60 days. The appearance is flowable and there is no paste-like bottom; the oil separation rate is less than 5%.

[0251] The test results of the above examples and comparative examples are shown in Table 1 below.

[0252] Table 1

[0253]

[0254] The data in the table show that the physical stability of the embodiments of the present invention is qualified, but the comparative example 3 has obvious oil separation from the paste, indicating that glyphosate salt is not suitable as a raw material in this formula; the oil separation rate of comparative example 4 is relatively high, indicating that the modified organic bentonite can effectively improve the stability of the preparation.

[0255] 2. Evaluation of glyphosate herbicidal activity

[0256] Indoor pot test method was used to plant corn and ramie to study the effects of different glyphosate formulations on the biological activity of plants. The specific method is as follows:

[0257] Wheat and corn seeds were soaked and sown in 12 cm plastic pots, placed in an artificial incubator and cultured until the 4-leaf stage, and then cultured in a low temperature environment of 15°C.

[0258] Spray with a throat sprayer, record visual control efficacy and fresh weight reduction rate after 7d and 14d. The glyphosate dosage is 60g / mu. The treated samples and results are shown in the following table.

[0259] Table 2

[0260]

[0261]

[0262] The calculation formula of fresh weight inhibition rate is: fresh weight inhibition rate (%) = (control fresh weight - treatment fresh weight) / control fresh weight × 100%.

[0263] 3. Determination of field weed control effect

[0264] The field bioassay method was used. In the early stage, seeds of velvetleaf, goosegrass and foxtail grass were sown on the open ground to make the target weeds more distributed on the plot. The weeds were sprayed to study the effects of various preparations on the efficacy. The specific methods are as follows:

[0265] A total of 7 plots of 2×20m were circled in the wasteland, ensuring that there were at least 5 ramie, 5 goosegrass and 5 foxtail grass in each plot. The interval between each plot was 2m. A backpack sprayer was used for quantitative spraying. The dosage of the preparation was 150g / mu. The death of weeds in the field was observed after 7d and 14d, and the control effect was recorded by visual observation. The ambient temperature during treatment was 15℃. The results are shown in the following table.

[0266] Table 3 Field test results of preparations

[0267]

[0268]

[0269] The data in the table show that under low temperature (15°C), compared with Comparative Example 1 without adding a growth regulator, the dispersible oil suspension of the embodiment of the present invention has a better herbicidal effect. Therefore, by adding a growth regulator to the system, the herbicidal effect on crops can be significantly improved. However, when the amount or combination of the growth regulator is not appropriate, the synergistic effect of the herbicidal effect is not obvious, such as Comparative Examples 2, 6 and 7, and even the control effect is significantly reduced, such as Comparative Example 5. Therefore, the amount and combination of the growth regulator are very important.

[0270] The technical substance used in Comparative Example 3 is glyphosate ammonium salt, and the control effect is similar to that of Example 1, indicating that different technical substances have a greater impact on the stability of the formulation, and it is not suitable for preparing an oil suspension. However, the trend of the control effect after combining with the growth regulator is consistent.

[0271] Compared with Comparative Example 1 with a glyphosate content of 27% and Comparative Example 8 with a glyphosate content of 30%, Examples 1 to 4 have a higher protective effect than Comparative Example 1 and are close to Comparative Example 8, and the 7d protective effect is generally higher than Comparative Example 1 and Comparative Example 8, indicating that the formulation of the present invention can reduce the amount of pesticide used and shorten the time it takes for the efficacy to develop.

[0272] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them, but it does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A dispersible oil suspension, characterized in that: The dispersible oil suspension comprises glyphosate, a growth regulator, an emulsifier, a dispersant, a thickener and a dispersion medium. The growth regulator is chlorfenapyr, 6-benzylaminopurine and sodium nitrophenolate. The mass ratio of chlorfenapyr, 6-benzylaminopurine and sodium nitrophenolate is 1: (0.6-1.2): (6-20).

2. The dispersible oil suspension according to claim 1, characterized in that: The growth regulator accounts for 3-6% of the total mass of the dispersible oil suspension.

3. The dispersible oil suspension according to claim 1, characterized in that: The forchlorfenuron accounts for 0.25-0.5% of the total mass of the dispersible oil suspension; The 6-benzylaminopurine accounts for 0.1 to 0.5% of the total mass of the dispersible oil suspension; The sodium complex nitrophenolate accounts for 4-5% of the total mass of the dispersible oil suspension.

4. The dispersible oil suspension according to claim 1, characterized in that: The emulsifier is selected from one or more of hydroxy polyethylene oxide block copolymers, anhydrous calcium salt of linear calcium dodecylbenzene sulfonate alkane solution, sorbitan fatty acid esters, castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether, cardanol polyoxyethylene ether, fatty acid methyl ester ethoxylate, fatty amine polyoxyethylene ether, block polyether, polyether polyol, and hydroxy polyethylene oxide block copolymers; and / or, The emulsifier accounts for 10-20% of the total mass of the dispersible oil suspension.

5. The dispersible oil suspension according to claim 1, characterized in that: The dispersant is selected from one or more of a sodium lignin sulfonate dispersant, a nonionic polymer condensation polymer, and a polycarboxylate dispersant; and / or, The dispersant accounts for 1-5% of the total mass of the dispersible oil suspension.

6. The dispersible oil suspension according to claim 1, characterized in that: The thickener is selected from one or more of modified organic bentonite, xanthan gum, magnesium aluminum silicate, and white carbon black; and / or, The thickener accounts for 0.2-5% of the total mass of the dispersible oil suspension.

7. The dispersible oil suspension according to claim 1, characterized in that: The dispersion medium is oil; and / or, The dispersion medium accounts for 40-60% of the total mass of the dispersible oil suspension.

8. The dispersible oil suspension according to claim 7, characterized in that: The dispersion medium is selected from one or more of fatty acid methyl ester, fatty acid ethyl ester, tri-epoxy fatty acid ester, trioctyl trimellitate, epoxyglycerol tricarboxylate, chloromethoxy fatty acid ester and vegetable oil.

9. The dispersible oil suspension according to any one of claims 1 to 8, characterized in that: Taking the total mass of the dispersible oil suspension as 100%, the dispersible oil suspension comprises the following components: Glyphosate 20-30%; Growth regulator 3-6%; Emulsifier 10-20%; Dispersant 1-5%; Thickener 0.2-5%; Dispersion medium, replenishment.

10. Use of the dispersible oil suspension concentrate according to any one of claims 1 to 9 in transgenic crops.

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