Paddy field weed treatment agent composition and preparation method thereof
By combining butanolamine, benzylsulfuron and reconciliation of sashimithine in rice field herbicides, and using stabilizers such as urea and organic bentonite, the medical damage, thermal decomposition and blockage of existing herbicides are solved, and the herbicidal effect is improved and rice yields, achieving more efficient and safe weeding effects.
Patent Information
- Application Number
- CN202411362054.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-01-03
AI Technical Summary
The existing herbicides in rice fields such as prothorum and butyrolyl have drug damage, poor results and thermal decomposition problems of benzylsulfuron during use, resulting in limited weed removal effect and rice yield, and are prone to blockage. Medicine equipment spray head.
The emulsification dispersion and stability of the composition are used by the combination of stabilizers such as urea and structural regulators such as organic bentonite and gas-phase white carbon black. , reduce the thermal decomposition rate of benzylsulfuron and avoid oil dissipation and blockage problems.
It improves the emulsification and dispersion and prevention effect of weed treatment agents in rice fields, reduces the risk of drug damage, enhances the removal ability of weeds in rice fields, improves rice yield, simplifies the use process, and reduces environmental pollution.
Smart Images
Figure BDA0005065174930000041 
Figure BDA0005065174930000051 
Figure BDA0005065174930000121
Abstract
Description
Technical Field
[0001] The invention relates to a weed control composition, in particular to a paddy field weed control composition and a preparation method thereof. Background Art
[0002] Weeds in rice fields affect the normal growth of rice. Currently, commonly used rice field herbicides include butachlor and pretilachlor. However, it is found during use that although pretilachlor is easy to use and low in cost, and can kill weeds with one leaf and one heart, pretilachlor is prone to cause phytotoxicity and delay rice growth. Butachlor is highly safe, and excessive use does not affect rice growth. It can be sprayed or sprayed without affecting surrounding crops. However, for the demand to further increase rice yield, butachlor cannot achieve satisfactory results, and the use of herbicidal compositions under different types of soil and climatic conditions will also have different effects on the removal effect of weeds in rice fields and rice yield. The herbicidal compositions currently used in rice fields also involve the use of benzylsulfuron-methyl as an active ingredient for controlling weeds in rice fields, but benzylsulfuron-methyl will decompose during application, reducing its use effect, and the components in the herbicidal composition are easy to clog the spray nozzle of the spraying equipment during the spraying process, affecting the weed control effect.
[0003] A Chinese patent with patent publication number CN103271059B discloses a herbicidal composition consisting of promethazinesulfuron-methyl and benzylsulfuron-methyl, but does not involve solving the problem of thermal decomposition of benzylsulfuron-methyl.
[0004] Therefore, providing a rice field weed control agent composition with good dispersibility and reduced thermal decomposition of bensulfuron-methyl is a major technical problem that needs to be solved at present. Summary of the invention
[0005] In order to solve the above technical problems, the first aspect of the present invention provides a rice field weed control agent composition, which comprises, by mass percentage, 50-60% butachlor, 2-5% benzylsulfuron-methyl, 4-8% fenthiocarb, 7-12% emulsifier, 3-7% stabilizer, 2-5% dispersant, 0-2% thickener, 4-8% solvent, 1.5-4% structure regulator, and the remainder of solvent oil.
[0006] In one embodiment, the weight ratio of butachlor, benzylsulfuron-methyl and fenthiocarb is (55-58):(2.5-3.5):(5-7).
[0007] The CAS number of the butachlor is 23184-66-9.
[0008] The CAS number of the benzylsulfuron-methyl is 83055-99-6.
[0009] The CAS number of the fenthiocarb is 3740-92-9.
[0010] In a preferred embodiment, the weight ratio of butachlor, benzylsulfuron-methyl and fenthiocarb is 57:3:6.
[0011] In one embodiment, the stabilizer includes urea, stabilizer 093, or a combination of both.
[0012] In one embodiment, the stabilizer is a combination of stabilizer 093 and urea.
[0013] In one embodiment, the weight ratio of the stabilizer 093 to urea is 1:(1-2).
[0014] In a preferred embodiment, the weight ratio of the stabilizer 093 to urea is 1:1.5.
[0015] In order to improve the emulsification and dispersibility of the weed control composition for paddy fields and reduce the thermal degradation rate of bensulfuron-methyl, the inventors found in the experimental process that the stabilizer is a combination of stabilizer 093 and urea, and the weight ratio of stabilizer 093 and urea is 1: (1-2) for the combined effect, especially when the weight ratio of stabilizer 093 and urea is 1: 1.5, the thermal decomposition of bensulfuron-methyl can be reduced; the possible reason is that the stabilizer 093 and urea have an impact on the system of the suspending agent after being combined, forming a stable system, which can inhibit the thermal degradation of bensulfuron-methyl, thereby improving the removal effect of the weed control composition for paddy fields on weeds in paddy fields and increasing the yield of rice.
[0016] In one embodiment, the stabilizer used in the present application includes stabilizer 091, triethanolamine, and stabilizer NX-9.
[0017] In one embodiment, the structure regulator includes one or a combination of organic bentonite and fumed silica.
[0018] In one embodiment, the structure regulator is a combination of organic bentonite and fumed silica.
[0019] In one embodiment, the weight ratio of the fumed silica to the organic bentonite is 1:(0.5-4).
[0020] In a preferred embodiment, the weight ratio of the fumed silica to the organic bentonite is 1:1.
[0021] In one embodiment, the thickener is thickener TK.
[0022] In one embodiment, the emulsifier includes one of emulsifier 3462E and emulsifier 801S, or a combination of both.
[0023] In one embodiment, the emulsifier is a combination of emulsifier 3462E and emulsifier 801S.
[0024] In one embodiment, the weight ratio of the emulsifier 801S to the emulsifier 3462E is 1:(1-2).
[0025] The inventors found in the experimental process that although the problem of reducing the thermal degradation rate of bensulfuron-methyl was solved, the weed control agent composition for paddy fields still had the problem of oil separation during application, and the spray nozzle of the spraying equipment would be blocked during the application process. In order to reduce the oil separation rate of the weed control agent composition for paddy fields, improve the dispersibility of the weed control agent composition for paddy fields in water, and avoid blocking the spray nozzle of the spraying equipment during the application process, the inventors accidentally found in the experimental process that the stabilizer 093 and urea were used in combination, the weight ratio of the stabilizer 093 to urea was 1:1.5, and the gas phase white The weight ratio of carbon black and organic bentonite is 1:1, and the carbon black and organic bentonite are combined with thickener TK. When the weight ratio of thickener TK to fumed silica and organic bentonite is 0.5:1:1, the obtained paddy field weed control agent composition has excellent emulsification and dispersion performance and low oil separation rate. The paddy field weed control agent composition has a high degree of dispersion in water, and is not easy to clog the spray nozzle of the spraying equipment during the use process, thereby improving the removal effect of the paddy field weed control agent composition on weeds in the paddy field, and can increase the yield of rice, and can greatly reduce the occurrence of pesticide damage during field application.
[0026] In one embodiment, the solvent includes diesel oil, epoxidized soybean oil, or a combination of both.
[0027] In one embodiment, the solvent is a combination of diesel and epoxidized soybean oil.
[0028] In one embodiment, the diesel model is diesel 500#.
[0029] In one embodiment, the mineral spirits include methyl oleate.
[0030] In one embodiment, the dispersant includes dispersant 3498D.
[0031] In one embodiment, the formulation of the paddy field weed control composition is any one of a dispersible oil suspension, emulsifiable concentrate, water emulsion, microemulsion, suspoemulsion, granules, microcapsule suspension, water dispersible granules, and wettable powder.
[0032] In one embodiment, the formulation of the rice field weed control composition is a dispersible oil suspension.
[0033] The second aspect of the present invention provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0034] Calculated by mass percentage, 50-60% of butachlor, 2-5% of benzylsulfuron-methyl, 4-8% of fenthiocarb, 7-12% of emulsifier, 3-7% of stabilizer, 2-5% of dispersant, 0-2% of thickener, 4-8% of solvent, 1.5-4% of structure regulator and solvent oil are added to 100% and mixed, and then a shearing machine is used for shearing and dispersion, and sand milling is performed to obtain a paddy field weed control agent composition.
[0035] Beneficial Effects
[0036] 1. The technical solution provided by the present invention improves the emulsification and dispersibility of the rice field weed control agent composition and reduces the thermal decomposition rate of benzylsulfuron-methyl, thereby having a good control effect on weeds in rice fields.
[0037] 2. The technical solution provided by the present invention reduces the oil separation rate of the rice field weed control agent composition and improves the dispersibility of the rice field weed control suspension composition containing fertilizer in water.
[0038] 3. The rice field weed control agent composition provided by the present invention is simpler than using two single agents and does not have problems such as poor compatibility.
[0039] 4. The paddy field weed control agent composition provided by the present invention can reduce the dosage used, has a significant synergistic effect, reduces pollution to the environment, and improves the safety of rice crops.
[0040] 5. The paddy field weed control agent composition provided by the present invention can improve the emulsification and dispersibility of the suspension composition, reduce the thermal decomposition rate of benzylsulfuron-methyl, improve the safety of the suspension composition, and increase rice yield by adding a specific stabilizer urea.
[0041] 6. The paddy field weed control agent composition provided by the present invention improves the stability of bensulfuron-methyl, reduces the risk of phytotoxicity, ensures the safety of the preparation, and increases rice yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] Figure 1 This shows the growth of rice 2 days after spraying drug A and drug B.
[0043] Figure 2 This is the growth of rice roots 2 days after spraying drug A and drug B.
[0044] Figure 3 This is the growth and root condition of rice 13 days after spraying drug A.
[0045] Figure 4 This is the growth and root condition of rice 13 days after spraying drug B.
[0046] Figure 5This shows the growth of rice 23 days after spraying drugs A and B. DETAILED DESCRIPTION
[0047] The raw materials used in the following examples are purchased from manufacturers shown in Table 1:
[0048] Table 1
[0049]
[0050]
[0051] Example 1
[0052] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 1% urea, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0053] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0054] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0055] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, and urea were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing, dispersion, and sand milling to obtain a rice field weed control agent composition.
[0056] Example 2
[0057] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0058] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0059] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0060] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, and urea were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing, dispersion, and sand milling to obtain a rice field weed control agent composition.
[0061] Example 3
[0062] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 2% stabilizer 091, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0063] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0064] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0065] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, and stabilizer 091 were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0066] Example 4
[0067] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% triethanolamine, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0068] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0069] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0070] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxy soybean oil, and triethanolamine were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0071] Example 5
[0072] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0073] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0074] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0075] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, and stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0076] Example 6
[0077] The first aspect of the present embodiment provides a paddy field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% stabilizer NX-9, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 1% organic bentonite, 0.5% fumed silica, 0.5% thickener TK, and methyl oleate supplemented to 100%.
[0078] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0079] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0080] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, stabilizer NX-9 were first added to the sand mill, and then organic bentonite, fumed silica, thickener TK, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0081] Example 7
[0082] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 1% organic bentonite, 1% fumed silica, and methyl oleate supplemented to 100%.
[0083] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0084] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0085] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, and stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0086] Example 8
[0087] The first aspect of the present embodiment provides a rice field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 0.5% fumed silica, and methyl oleate supplemented to 100%.
[0088] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0089] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0090] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, and stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0091] Example 9
[0092] The first aspect of the present embodiment provides a paddy field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 2% organic bentonite, 0.5% fumed silica, 1% thickener TK, and methyl oleate is supplemented to 100%.
[0093] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0094] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0095] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, thickener TK, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0096] Example 10
[0097] The first aspect of the present embodiment provides a paddy field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 1% organic bentonite, 1% fumed silica, 0.5% thickener TK, and methyl oleate is supplemented to 100%.
[0098] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0099] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0100] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, thickener TK, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0101] Embodiment 11
[0102] The first aspect of the present embodiment provides a paddy field weed control agent composition, wherein the raw materials for its preparation include, by mass percentage: 57% butachlor, 3% benzylsulfuron-methyl, 6% fenthiocarb, 6% emulsifier 3462E, 3.2% emulsifier 801S, 3% urea, 2% stabilizer 093, 3% dispersant 3498D, 3% diesel 500#, 3% epoxidized soybean oil, 0.5% organic bentonite, 1% fumed silica, 0.5% thickener TK, and methyl oleate is supplemented to 100%.
[0103] The formulation of the rice field weed control agent composition is a dispersible oil suspension.
[0104] A second aspect of this embodiment provides a method for preparing a rice field weed control agent composition, comprising the following steps:
[0105] According to the added mass proportion of the above-mentioned raw materials, butachlor, benzylsulfuron-methyl, fenthiocarb, emulsifier 3462E, diesel 500#, emulsifier 801S, dispersant 3498D, epoxidized soybean oil, urea, stabilizer 093 were first added to the sand mill, and then organic bentonite, fumed silica, thickener TK, and methyl oleate were added for mixing, and then a shearing machine was used for shearing and dispersion, and sand milling was performed to obtain a rice field weed control agent composition.
[0106] In Examples 1-11, the paddy field weed control agent composition D was obtained by sand milling. 90 The particle size is 3-4μm.
[0107] Performance Testing
[0108] 1. Emulsification performance test:
[0109] Determination of emulsion stability: The paddy weed control agent composition obtained in Examples 1-11 was diluted 50 times with 342ppm standard hard water, and taken out after standing in a constant temperature water bath at 30°C for 24h; the separation of the suspension composition was observed, and the qualified evaluation criteria were: initial dispersibility (0h) no precipitation, no cream or floating oil, dispersibility after a certain period of time (30min) cream or floating oil ≤3ml, precipitation ≤5ml, redispersibility (24h) no precipitation, no cream or floating oil, redispersibility (24.5h) cream or floating oil ≤2ml, precipitation ≤1ml; if the above test results were met, it was evaluated as qualified, and if the above standards were not met, it was evaluated as unqualified. The test results are shown in Table 2.
[0110] Table 2
[0111] Example Emulsification and dispersibility Example 1 qualified Example 2 qualified Example 3 qualified Example 4 qualified Example 5 qualified Example 6 Failure Example 7 qualified Example 8 qualified Example 9 qualified Example 10 qualified Embodiment 11 qualified
[0112] It can be seen from the test results in Table 2 that during the application process of the weed control composition for rice fields provided in Examples 1-11 of the present application, except for Example 6, the weed control composition for rice fields provided in other Examples still has good emulsification and dispersibility when diluted with hard water and sprayed on the rice field. It can be seen that the weed control composition for rice fields provided in Examples 1-5 and Examples 7-11 of the present application is less affected by water hardness and is more suitable for weeding in rice fields in different regions.
[0113] 2. Chemical stability test:
[0114] The paddy weed control agent compositions provided in Examples 1-6 and Example 10 were subjected to heat storage. After the heat storage test (stored in an oven at 40 degrees Celsius for 8 weeks), the contents of bensulfuron-methyl in the paddy weed control agent compositions provided in Examples 1-6 and Example 10 before and after heat storage were determined using a high performance liquid chromatograph, and the degradation rate of bensulfuron-methyl was calculated. A degradation rate of ≤5% was considered qualified, otherwise it was unqualified. The test results are shown in Table 3.
[0115] Degradation rate of bensulfuron-methyl=(bensulfuron-methyl content before hot storage-bensulfuron-methyl content after hot storage) / bensulfuron-methyl content before hot storage*100%.
[0116] Table 3
[0117] Example Degradation rate of bensulfuron-methyl Example 1 23.6％ Example 2 10.3％ Example 3 11.8％ Example 4 11.5％ Example 5 4.3％ Example 6 6.6％ Example 10 4.17％
[0118] It can be seen from the test data in Table 3 that the degradation rate of bensulfuron-methyl in the rice field weed control composition provided in Example 5 and Example 10 is less than 5%, and is a qualified product; thus, it can be seen that urea and stabilizer 093 can be combined as a stabilizer to reduce the degradation rate of bensulfuron-methyl in the rice field weed control composition.
[0119] 3. Physical stability performance test:
[0120] The paddy field weed control agent compositions provided in Examples 5 and 7-11 were subjected to heat storage. After the heat storage test (stored in an oven at 40 degrees Celsius for 8 weeks), the oil separation rate was measured. The test results are shown in Table 4.
[0121] Oil separation rate = oil separation height of sample after thermal storage / sample height*100%.
[0122] Table 4
[0123] Example Oil separation rate Example 5 5.46％ Example 7 28.7％ Example 8 19.6％ Example 9 No flow Example 10 5.2％ Embodiment 11 34.2％
[0124] It can be seen from Table 4 that the paddy weed control agent compositions provided in Example 5 and Example 10 have the most prominent effect on controlling the oil separation rate of the physical stability of the system, and the oil separation rate is low. In addition, the higher the dispersion degree of the paddy weed control agent composition in water, the less likely it is to clog the spray nozzle of the spraying equipment during the spraying process, thereby greatly reducing the occurrence of pesticide damage during field application.
[0125] 4. Indoor bio-test experiment:
[0126] The rice field weed control agent composition provided in Example 10 was used as drug A, and the suspension composition obtained by replacing butachlor in Example 10 with pretilachlor was used as drug B, and the rice cultured in the incubator was sprayed respectively; the rice cultured in the incubator was first soaked in water for 2 days, then placed in the incubator and cultured until the rice had buds and roots, and then sown, and the effects of spraying the drugs were observed; the drug A was sprayed once at a dosage of 100 mL / mu, and the drug B was sprayed once at a dosage of 70 mL / mu; the rice growth and root system were observed 2 days, 13 days, and 23 days after spraying. The rice growth after 2 days of spraying of drugs A and B is shown in Figure 2. Figure 1 , root system conditions see Figure 2 . The growth and root condition of rice 13 days after spraying drug A is shown in Figure 3 . The growth and root condition of rice 13 days after spraying drug B is shown in Figure 4 The growth of rice 23 days after spraying drug A and drug B is shown in Figure 5 .
[0127] pass Figure 1-5 It can be seen that the rice field weed control composition provided in Example 10 of the present application can promote the development of the rice root system and promote the growth of rice.
[0128] 5. Efficacy and yield test:
[0129] The paddy field weed control composition provided in Example 10 was applied to paddy fields in different regions, and 32 wt % benzylsulfuron-methyl wettable powder and 60 wt % butachlor emulsifiable concentrate were selected as control tests and applied to paddy fields to observe the control effects on weeds such as barnyard grass, clematis, and sedge in the paddy fields, and record whether there was any effect on the growth and development of rice and whether there was an effect on increasing rice yield.
[0130] Drugs and dosages: the rice field weed control agent composition provided in Example 10 (the dosage of the preparations is: 540, 720, 900, 1440 g / hectare respectively); 32 wt% benzylsulfuron-methyl wettable powder (the dosage of the preparation is: 48 g / hectare); 60 wt% butachlor emulsifiable concentrate (the dosage of the preparation is: 1080 g / hectare); the control group (CK) was not treated in any way.
[0131] Calculation method of drug efficacy:
[0132]
[0133] The experimental data were analyzed for significance of differences using Duncan's new multiple range method in DPS (V8.04) statistical analysis software. The same uppercase and lowercase letters in the analysis results indicate that the differences were not significant at the 1% and 5% levels. The specific method is as follows: 1) Open the DPS interface; 2) Enter the selected analysis data; 3) Click "Experimental Statistics"; 4) Click "Randomized Block Design"; 5) "Single Factor Statistical Analysis"; 6) Click "Arcsine Square Root Transformation" and "Duncan's New Multiple Range Method", and finally click "Calculate" to obtain the control effect.
[0134] Product yield and quality:
[0135] In this experiment, the yield of each plot was measured at the rice maturity stage. Four plots were taken from each plot, each plot was 0.25m 2 . And convert it into yield per plot, per mu, and per hectare for statistical analysis and yield increase rate calculation.
[0136]
[0137] The Duncan new multiple range method in the DPS statistical analysis software was used for difference significance analysis. The same uppercase and lowercase letters in the analysis results indicate that the difference is not significant at the 1% and 5% levels. The specific method is as follows: 1) Open the DPS interface; 2) Enter the selected analysis data; 3) Click "Experimental Statistics"; 4) Click "Randomized Block Design"; 5) "Single Factor Statistical Analysis"; 6) Click "No Conversion" and "Duncan New Multiple Range Method", and finally click "Calculate" to obtain the yield increase rate.
[0138] Test 1:
[0139] Location: Research Base of the School of Architecture, Guangxi Academy of Agricultural Sciences.
[0140] Time: Application of pesticide on May 12, 2021.
[0141] The test results of the control effect on weeds such as barnyard grass, sedge and sedge in rice fields, whether it has an effect on rice growth and development, and whether it has an effect on increasing rice production are shown in Table 5.
[0142] Test results (safety): All drug treatments had no effect on rice emergence, and no symptoms of rice damage were observed during the entire test period. All drug treatments had no effect on rice growth and development.
[0143] Test results (control effect): The control effect of the rice field weed control agent composition provided in Example 10 on barnyard grass is better than 32wt% benzylsulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare); the three agents have the same control effect on Cyperus difformis, reaching 100%.
[0144] Test results (yield measurement): The rice yield treated with the rice field weed control agent composition provided in Example 10 is significantly better than 32% bensulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); and better than or equal to the rice yield treated with 60% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare).
[0145] Table 5
[0146]
[0147]
[0148] In Table 5, the letters A and B represent different groups or treatment groups, and a and b represent whether the differences between these groups or treatment groups are significant. Lowercase letters a and b reflect the 5% significance level, and uppercase letters A and B reflect the 1% extremely significant level.
[0149] Test 2:
[0150] Location: Liguanzhuang Village, Jiyang District, Jinan City, Shandong Province.
[0151] Time: After rice is sown and before seedlings emerge, spray the soil before seeds and buds are exposed, and apply the pesticide once; the specific time for application is June 25, 2021.
[0152] The test results of the control effect on weeds such as barnyard grass, sedge and sedge in rice fields, whether it has an effect on rice growth and development, and whether it has an effect on increasing rice production are shown in Table 6.
[0153] Test results (safety): All drug treatments had no effect on rice emergence, and no symptoms of rice damage were observed during the entire test period. All drug treatments had no effect on rice growth and development.
[0154] Test results (control effect): The control effect of the rice field weed control composition provided in Example 10 on barnyard grass and sedge is better than 32wt% bensulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare); the control effect of the rice field weed control composition provided in Example 10 on sedge is equivalent to that of a single agent of 60% butachlor emulsifiable concentrate, and is better than 32% bensulfuron-methyl wettable powder.
[0155] Test results (yield measurement): The rice yield treated with the rice field weed control agent composition provided in Example 10 was significantly better than that treated with 32wt% benzylsulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare); the final rice yield of the two groups was treated.
[0156] In summary, under the conditions of this experiment, the application of the rice field weed control composition provided in Example 10 has an ideal control effect on barnyard grass, clematis and sedge, and the usage amount is significantly reduced compared with a single agent; the yield measurement results show that it has a significant yield-increasing effect compared with the control agent.
[0157] Table 6
[0158]
[0159]
[0160] Test 3:
[0161] Location: Dabahu Village, Shushiying Town, Ang'angxi District, Qiqihar City, Heilongjiang Province.
[0162] Time: After rice is sown and before seedlings emerge, spray the soil before seeds and buds are exposed, and apply the pesticide once; the specific time for application is May 29, 2021.
[0163] The test results of the control effect on weeds such as barnyard grass, raindrops, and sedge in rice fields, whether it has an impact on the growth and development of rice, and whether it has an effect on increasing rice production are shown in Table 7.
[0164] Test results (safety): All drug treatments had no effect on rice emergence, and no symptoms of rice damage were observed during the entire test period. All drug treatments had no effect on rice growth and development.
[0165] Test results (control effect): The control effect of the rice field weed control agent composition provided in Example 10 on barnyard grass, sedge and raindrops was significantly better than 32wt% bensulfuron-methyl wettable powder (formulation dosage: 48g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080g / hectare).
[0166] Test results (yield measurement): The rice yield treated with the rice field weed control composition provided in Example 10 was significantly better than that of 32wt% benzylsulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare).
[0167] In summary, under the conditions of this experiment, the application of the rice field weed control composition provided in Example 10 has an ideal control effect on barnyard grass, Cyperus difformis, and raindrops. Compared with a single agent, the usage amount is significantly reduced, and the yield measurement results show that it has a significant yield-increasing effect compared with the control agent.
[0168] Table 7
[0169]
[0170]
[0171] Test 4:
[0172] Location: Xuanwu District, Nanjing City, Jiangsu Province.
[0173] Time: After rice is sown and before seedlings emerge, spray the soil before seeds and buds are exposed, and apply the pesticide once; the specific time for application is June 15, 2021.
[0174] The test results of the control effect on weeds such as barnyard grass, sedge and sedge in rice fields, whether it has an effect on rice growth and development, and whether it has an effect on increasing rice production are shown in Table 8.
[0175] Test results (safety): All drug treatments had no effect on rice emergence, and no symptoms of rice damage were observed during the entire test period. All drug treatments had no effect on rice growth and development.
[0176] Test results (control effect): The control effect of the rice field weed control agent composition provided in Example 10 on barnyard grass, sedge and truncatum is significantly better than 32wt% bensulfuron-methyl wettable powder (formulation dosage: 48g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080g / hectare).
[0177] Test results (yield measurement): The rice yield increase of the rice field weed control composition provided in Example 10 was significantly better than that of 32wt% benzylsulfuron-methyl wettable powder (formulation dosage: 48 g / hectare); 60wt% butachlor emulsifiable concentrate (formulation dosage: 1080 g / hectare).
[0178] Table 8
[0179]
[0180] In summary, the application of the rice field weed control agent composition provided in Example 10 (formulation dosage: 900, 1440 g / hectare) in rice fields has an ideal control effect on barnyard grass, Cyperus difformis, and Scutellaria baicalensis. Compared with a single agent, the usage amount is significantly reduced. The yield measurement results show that it has a certain yield-increasing effect compared with the control agent.
[0181] The description of the contents of the present invention is illustrative and is not intended to limit the scope of the present invention to the above-mentioned embodiments. Therefore, the present invention is not limited to the embodiments, and any technical solution obtained by equivalent replacement using the inventive concept of the present invention is within the scope of protection of the present invention.
Claims
1. A rice field weed control composition, characterized in that: The raw materials for its preparation include, by mass percentage, 50-60% of butachlor, 2-5% of benzylsulfuron-methyl, 4-8% of fenthiocarb, 7-12% of emulsifier, 3-7% of stabilizer, 2-5% of dispersant, 0-2% of thickener, 4-8% of solvent, 1.5-4% of structure regulator and the remainder of solvent oil.
2. The paddy field weed control composition according to claim 1, characterized in that: The weight ratio of butachlor, benzylsulfuron-methyl and fenthiocarb is (55-58):(2.5-3.5):(5-7).
3. The rice field weed control composition according to claim 1, characterized in that: The stabilizer includes urea, stabilizer 093, or a combination of the two.
4. The rice field weed control composition according to claim 1, characterized in that: The weight ratio of the stabilizer 093 to urea is 1:(1-2).
5. The rice field weed control composition according to any one of claims 1 to 4, characterized in that: The structure regulator includes one or a combination of organic bentonite and fumed silica.
6. The paddy field weed control composition according to claim 5, characterized in that: The weight ratio of the fumed silica to the organic bentonite is 1:(0.5-4).
7. The rice field weed control composition according to claim 1, characterized in that: The emulsifier includes one of emulsifier 3462E and emulsifier 801S, or a combination of both.
8. The paddy field weed control composition according to claim 1, characterized in that: The solvent includes diesel oil, epoxidized soybean oil or a combination of both.
9. The rice field weed control composition according to claim 1, characterized in that: The dosage form of the paddy field weed control agent composition is any one of a dispersible oil suspension, emulsifiable concentrate, water emulsion, microemulsion, suspoemulsion, granule, microcapsule suspension, water dispersible granule and wettable powder.
10. A method for preparing the rice field weed control composition according to any one of claims 1 to 9, characterized in that: The following steps are involved: Calculated by mass percentage, 50-60% of butachlor, 2-5% of benzylsulfuron-methyl, 4-8% of fenthiocarb, 7-12% of emulsifier, 3-7% of stabilizer, 2-5% of dispersant, 0-2% of thickener, 4-8% of solvent, 1.5-4% of structure regulator and solvent oil are added to 100% and mixed, and then a shearing machine is used for shearing and dispersion, and sand milling is performed to obtain a paddy field weed control agent composition.