Herbicidal compositions containing glyphosate and their use

Abstract

The present application relates to the technical field of herbicides, in particular to a glyphosate-containing herbicidal composition and application thereof.The composition is glyphosate, pyraflufen-ethyl and flumioxazin, wherein the mass ratio of glyphosate, pyraflufen-ethyl and flumioxazin is (1-200):(0.1-5):(0.5-15) composition.The herbicidal composition has the characteristics of wide weed spectrum, long persistence and high prevention effect, and also has the effects of soil sealing and inhibiting weed germination, which plays an important role in delaying weed resistance.

Description

Technical Field

[0001] This invention relates to the field of herbicide technology, and more specifically to a glyphosate-containing herbicide composition and its application. Background Technology

[0002] Glyphosate is a non-selective, residue-free, non-selective herbicide that is highly effective against perennial rooted weeds and is widely used in rubber, mulberry, tea, orchards, and sugarcane fields. It primarily inhibits enolpyruvylshikimate phosphate synthase in plants, thereby inhibiting the conversion of shikimate to phenylalanine, tyrosine, and tryptophan, interfering with protein synthesis. It is absorbed through the green parts of weeds and rapidly translocated to all parts of the plant, killing weeds by the roots.

[0003] Propylene flumetsulam is a contact-type selective herbicide developed by Sumitomo Chemical Co., Ltd. of Japan. It can be absorbed by the young shoots and leaves of plants and can effectively control annual broadleaf weeds and annual grass weeds.

[0004] Pyrazosulfuron is a pyrazole herbicide for wheat fields developed by Nippon Nippon Kogyo Co., Ltd. The patent for this herbicide (technical grade) was applied for on August 31, 1988, and expired on August 31, 2008. This is a novel contact herbicide, primarily used to control various broadleaf weeds, with high selectivity for cereal crops. Like diquat and acetamiprid, pyrazosulfuron can also be used as a defoliant.

[0005] With weed resistance becoming increasingly serious, it is particularly important to develop new herbicides for orchards, wastelands, and other similar locations. Summary of the Invention

[0006] The purpose of this invention is to provide a weed control composition and its application.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A glyphosate-containing herbicidal composition comprising glyphosate, pyrazosulfuron, and propyzoxystrobin, wherein the mass ratio of glyphosate, pyrazosulfuron, and propyzoxystrobin is (1-200):(0.1-5):(0.5-15).

[0009] The mass ratio of glyphosate, pyrazosulfuron, and propyzoxystrobin in the composition is (40-80):(0.2-1.0):(2-4).

[0010] Application of the glyphosate-containing herbicidal composition, wherein the composition is used in the preparation of herbicides for weeds in non-cultivated land.

[0011] The weeds mentioned are one or more of the following: goosegrass and fleabane.

[0012] A herbicide, wherein the aforementioned herbicide is used as the active ingredient and mixed with common pesticide excipients; wherein the active ingredient accounts for 1-95% of the mass percentage of the formulation.

[0013] The formulation dosage form is a dispersible oil suspension, a suspension emulsion, a water-dispersible granule, a large granule, a wettable powder, a suspension, or an emulsifiable concentrate.

[0014] The herbicidal composition or corresponding formulation provided by this invention can significantly improve the control of herbicide-resistant weeds in non-cultivated land and orchards.

[0015] The herbicidal composition or herbicide of the present invention also has at least the following advantages:

[0016] (1) The herbicidal composition provided by the present invention has the characteristics of low dosage, which not only delays the development of herbicide resistance in weeds, but also saves costs.

[0017] (2) The herbicidal composition provided by the present invention can effectively kill weeds and reduce the harm of weeds to crops.

[0018] (3) Compared with the prior art, the herbicidal composition provided by the present invention can control resistant goosegrass, resistant fleabane and other noxious weeds. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments, but the present invention should not be construed as being limited to these embodiments.

[0020] When the composition of the present invention is compounded within a certain ratio range, it has excellent control effect on weeds in orchards and non-cultivated land. This not only improves the control efficacy of weeds in non-cultivated land, but also expands the weed control spectrum and enhances the safety.

[0021] All the substances used in the following examples are commercially available. The substances in the composition are mixed in two or three parts according to the proportions described above to obtain different compositions as drugs, which are then used for weed control testing.

[0022] Example 1: Indoor Experiment

[0023] 1) Test conditions

[0024] The tested weeds were resistant goosegrass and resistant fleabane. The experimental materials were cultivated in a heated glass greenhouse at 15-25℃ under natural light. Quantities of goosegrass and fleabane seeds were sown in 9cm diameter plastic pots, covered with 1-2mm of soil, and placed in enamel dishes filled with water. The water was allowed to gradually seep in until it reached the soil surface, after which the pots were transferred to an artificial climate chamber for later use. Different mixtures of pesticides were sprayed according to the dosages listed in Table 1. Except for 1-2 days after spraying, watering was not permitted, and regular bottom irrigation was used to maintain soil moisture.

[0025] Herbicidal activity test method: The foliar spray method (NY / T 1155.4-2006) was used. A measured amount of soil was filled to 3 / 4 of the height of a pot (11 cm high, 9 cm in diameter). 15–20 seeds of the target weed were evenly sown on the soil surface, covered with about 1 cm of fine soil, and then placed in a greenhouse (temperature 22–28℃, humidity 97%, the same below) for cultivation. When the weeds reached the 3–5 leaf stage, foliar spraying was performed, with 1 mL of herbicide solution sprayed per pot. Each treatment was replicated 4 times. After treatment, the test materials were placed in a greenhouse for cultivation, and the growth of the target weeds was observed regularly.

[0026] Fresh weight efficacy (%) = (Control fresh weight - Treatment fresh weight) / Control fresh weight × 100

[0027] Evaluation method for the combined effect of three herbicides: According to the Colby method, the formula is: E0 =

[0028] 100-XYZ / 100*100, where X is the percentage of the fresh weight of the target weeds compared to the fresh weight of the control when component A is used alone;

[0029] Y represents the percentage of the fresh weight of the target weeds compared to the fresh weight of the control when component B was used alone.

[0030] Z represents the percentage of the fresh weight of the target weeds compared to the fresh weight of the control when component C was used alone.

[0031] E0 represents the theoretical fresh weight protective efficacy of the target when components A, B, and C are used in combination.

[0032] E represents the actual fresh weight protective efficacy of the target when components A, B, and C are used alone or in combination.

[0033] Evaluation criteria: When E-E0 > 10%, it indicates a synergistic effect; when E-E0 is between ±10%, it indicates an additive effect; and when E-E0 < -10%, it indicates an antagonistic effect. The results are shown in Table 1.

[0034] Table 1: Evaluation of the combined effects of glyphosate, pyrazosulfuron, and propyzoxystrobin on weeds

[0035]

[0036]

[0037] As shown in Table 1, the ternary mixture of glyphosate, pyrazosulfuron, and propyzoxystrobin exhibits a synergistic effect on both resistant goosegrass and resistant fleabane. Furthermore, the synergistic effect is found to be better when the mass ratios of glyphosate, pyrazosulfuron, and propyzoxystrobin are 60:0.5:3.0 and 60:0.5:6.0.

[0038] Example 2: Field efficacy trial:

[0039] Experimental subject: Goosegrass in orchards.

[0040] Experimental Treatments: Field validation was conducted using the provided herbicide composition in Nanning, Guangxi. The experimental site was an orchard with an organic matter content of 1.8% and a pH of 7.15. A backpack sprayer was used, and each treatment was sprayed uniformly at a rate of 30 liters per acre. Areas with severe weed infestation were selected, with a 20m... 2 Each treatment was repeated three times in one plot. After 60 days, the treated and control areas were observed, the number of weeds was counted, and the plant control efficacy was calculated in the treated areas. The plant control efficacy (%) was calculated.

[0041] Control efficacy (%) = (Number of control weeds - Number of treatment weeds) / Number of control weeds × 100%

[0042] Test reagents: 30% glyphosate ammonium salt solution, 0.2% pyrimethanil suspension concentrate, 3% propyzamide dispersible oil suspension concentrate

[0043] Table 2. Field control efficacy of glyphosate, pyrazosulfuron-methyl, and propyzoxystrobin against goosegrass in orchards.

[0044]

[0045] Example 3: Field efficacy trial:

[0046] Test subject: Non-cultivated land aircraft grass

[0047] Experimental Treatments: Field validation was conducted using the provided herbicide composition in Nanning, Guangxi. The experimental sites were non-cultivated land, and backpack sprayers were used. Each treatment was applied with 30 liters of herbicide per acre for uniform spraying. Areas with severe weed infestation were selected, with a 20m... 2 Each treatment was repeated three times in one plot. After 30 days, the treated and control areas were observed, the number of weeds was counted, and the plant control efficacy of the treated areas was calculated. The plant control efficacy (%) was calculated.

[0048] Control efficacy (%) = (Number of control weeds - Number of treatment weeds) / Number of control weeds × 100%

[0049] Test reagents: 30% glyphosate ammonium salt solution, 0.2% pyrimethanil suspension concentrate, 3% propyzamide dispersible oil suspension concentrate

[0050] Table 3. Field control efficacy of glyphosate, pyrazosulfuron, and propyzoxystrobin on non-cultivated land by aircraft for weed control.

[0051]

[0052]

[0053] As shown in Tables 2 and 3, the combination of glyphosate, propyzamide, and pyrazosulfuron has a significant control effect on weeds such as goosegrass and sedge.

[0054] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A glyphosate-containing herbicidal composition, characterized by: The composition is glyphosate, pyrazosulfuron, and propyzoxystrobin, wherein the mass ratio of glyphosate, pyrazosulfuron, and propyzoxystrobin is (1-200):(0.1-5):(0.5-15).

2. The glyphosate-containing herbicidal composition according to claim 1, characterized in that: The mass ratio of glyphosate, pyrazosulfuron, and propyzoxystrobin in the composition is (40-80):(0.2-1.0):(2-4).

3. The glyphosate-containing herbicidal composition of claim 1, wherein: The composition is used in the preparation of herbicides for weeds in non-cultivated land.

4. The glyphosate-containing herbicidal composition according to claim 3, characterized in that: The weeds mentioned are one or more of the following: goosegrass and fleabane.

5. A herbicide, characterized by: Using the granules described in claim 1 as the active ingredient, they are mixed with common pesticide excipients; wherein the active ingredient accounts for 1-95% of the mass percentage of the formulation.

6. The herbicide according to claim 5, characterized in that: The formulation dosage form is a dispersible oil suspension, a suspension emulsion, a water-dispersible granule, a large granule, a wettable powder, a suspension, or an emulsifiable concentrate.

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