Weeding composition

Abstract

The invention provides a weeding composition for paddy fields, which is prepared by compounding iodosulfuron-methyl sodium salt (also called iodosulfuron-methyl sodium salt) and oxaziclomefone, the weight ratio of the effective components of iodosulfuron-methyl sodium salt to oxaziclomefone is 1: 1-1: 200, and the optimal ratio is 1: 20-1: 60. According to the weeding composition, the iodosulfuron-methyl sodium and the oxaziclomefone are accurately compounded, the weight ratio of the effective components is optimized, the multiple beneficial effects of efficient prevention and removal of rice field weeds, remarkable synergistic interaction, long lasting period, safety, environmental protection and the like are achieved, and the weeding composition has remarkable technical advantages and application value.

Description

Technical Field

[0001] The invention relates to the technical field of chemical weed control, and in particular to a weed control composition for paddy fields. Technical Background

[0002] There are three types of weeds that are common in rice fields: grass weeds, broadleaf weeds, and sedge weeds. There are many formulations suitable for weed control in rice fields, but due to long-term use, rice field weeds are prone to develop resistance to them, making it difficult to achieve ideal control effects. Therefore, herbicide products must be continuously innovated.

[0003] Using a single sodium salt of iodosulfuron-methyl to control paddy weeds can only control the damage of broadleaf weeds and sedge weeds in paddy fields. Using a single oxazithromycin preparation to control paddy weeds can control the damage of grass weeds, but the control of broadleaf weeds and sedge weeds is poor. Although the combination of sodium salt of iodosulfuron-methyl and amide herbicides can also control the damage of the three types of weeds, it is not lethal to grass weeds and has a short duration of effectiveness. Summary of the invention

[0004] In order to overcome the shortcomings of existing rice field herbicide preparations, the present invention provides a herbicide composition to effectively prevent and control the three major types of weeds in rice fields, especially having excellent control effects on various common drug-resistant weeds.

[0005] The invention provides a weed killing composition, which is prepared by compounding iodosulfuron-methyl sodium salt and oxazithromycin, wherein the effective component weight ratio of iodosulfuron-methyl sodium salt to oxazithromycin is 1:1-1:200.

[0006] Preferably, the optimal weight ratio of the active ingredients of iodosulfuron-methyl sodium salt to oxazithromycin is 1:20 to 1:60.

[0007] Preferably, the effective ingredient usage of iodosulfuron-methyl sodium salt is 0.75 to 15 grams per hectare.

[0008] Preferably, the optimal usage amount of the active ingredient of iodosulfuron-methyl sodium salt is 1.5 to 7.5 grams per hectare.

[0009] Preferably, the usage amount of the active ingredient of oxazithromycin is 1.5 to 150 grams per hectare.

[0010] Preferably, the optimal usage amount of the active ingredient of oxazithromycin is 15 to 90 grams per hectare.

[0011] Preferably, a safener is added.

[0012] Preferably, the safener comprises mefenpyr-butyl or furafol-butyl.

[0013] The herbicidal composition of the present invention achieves the following significant beneficial effects by compounding iodosulfuron-methyl sodium salt with oxazithromycin and accurately controlling the weight ratio of the active ingredients of the two to be 1:1 to 1:200, with the optimal ratio being 1:20 to 1:60:

[0014] 1. Highly effective weed control: The combination has high efficiency in controlling the three major types of weeds commonly found in rice fields, especially various common pesticide-resistant weeds. This greatly improves the efficiency of farmland weed management and reduces crop yield losses caused by weed competition.

[0015] 2. Significant synergistic effect: The two herbicidal components of iodosulfuron-methyl sodium and oxazithromycin have a significant synergistic effect after compounding, making the combination show excellent control effect on grass weeds such as barnyard grass and lycopodii, as well as broadleaf and sedge weeds. This synergistic effect not only enhances the weed control effect, but also broadens the weed control spectrum.

[0016] 3. Long lasting effect, safe and environmentally friendly: The composition has a long lasting effect and can maintain the weed control effect for a long time, thereby reducing the frequency and amount of herbicide use. At the same time, the composition is environmentally friendly, will not pollute the soil and water, and will not affect the growth of the next crop, which is in line with the development trend of green and environmentally friendly modern agriculture.

[0017] In summary, the herbicidal composition of the present invention achieves multiple beneficial effects such as high efficiency in weed control, significant synergistic effect, long lasting effect, safety and environmental protection by accurately compounding iodosulfuron-methyl sodium salt and oxazithromycin and optimizing the weight ratio of their effective ingredients, and has significant technical advantages and application value. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the embodiments, so that those skilled in the art can more fully understand the present invention, but the present invention is not limited in any way.

[0019] The invention provides a herbicidal composition, which is compounded by iodosulfuron-methyl sodium salt (component A) and oxaziclomefone (component B), wherein the weight ratio of the effective components (ai) of the two is 1:1-1:200, the usage amount of the iodosulfuron-methyl sodium salt effective component (ai) per hectare is 0.75-15 grams, and the usage amount of the oxaziclomefone effective component (ai) per hectare is 15-150 grams. The two herbicidal components have a synergistic effect, and have excellent control effects on gramineous weeds such as barnyard grass and sedge seeds in paddy fields, as well as broadleaf weeds and sedge weeds, and have a long lasting effect, do not affect the growth of the next crop, and are environmentally friendly.

[0020] The chemical names and structural formulas of the two components are introduced as follows:

[0021] Iodosulfuron-methyl sodium salt, also known as methyl iodosulfuron sodium salt, chemical name: 4-iodo-2-[3-(4-methoxy-6-methyl-1,3,5-triazine-2-yl)ureasulfonyl]benzoic acid methyl ester sodium salt. The English name is iodosulfuron-methylsodium, and the molecular formula is C 14 H 13 IN5NaO6S, molecular weight is 529.2422, CAS registration number is 144550-36-7, pure product is white solid, suitable for crops: wheat; safe for cereal crops, no impact on subsequent crops, and highly compatible and safe for the environment and ecology. Its molecular structure is as follows:

[0022]

[0023] Oxaziclomefone, chemical name: 3-[1-(3,5-dichlorophenyl)-1-methylethyl]-2,3-dihydro-6-methyl-5-phenyl-4H-1,3-oxazin-4-one, molecular formula C 20 H 19 Cl2NO2, molecular weight 372 (Cl calculated as 35.5), (test code: MY100, common name: Oxaziclomefone, trade name: S:amoural, Homerun, Thoroughbred, Tredy, Qubaian) is a new type of oxazinon herbicide created by Mitsubishi Petrochemical Co., Ltd. of Japan and developed by Syngenta (formerly Aventis). It is mainly used to control important broadleaf weeds, sedge weeds and barnyard weeds, etc. It has a special effect in removing barnyard grass and can also be used for lawn weeding. Its molecular structure is as follows:

[0024]

[0025] In early May 2022, a small-scale efficacy test of this composition for rice seedling fields was conducted in Tianxing Village, Zhangjiasai Township, Ziyang District, Yiyang City. The spray application was carried out 12 days after rice seedlings were planted (when the barnyard grass in the field was 1.5 leaves old), and the control effect was investigated 20 days after the application. The results are listed in the following table:

[0026]

[0027] From the table above, we can see that the test results of the three different ratios show that when the dosage of component A is low, the control effect on broadleaf and sedge weeds is slightly poor, and when the dosage of component B is low, the control effect on gramineous weeds is slightly poor. When the ratio of component A to component B is 1:15, the control effect on gramineous weeds, broadleaf weeds, and sedge weeds is good.

[0028] In early June 2023, a small plot efficacy test of the composition for rice machine transplanting was conducted in Xin'an 2 Village, Zhixin Town, Longjing City, Jilin Province. The pesticide was sprayed 15 days after rice transplanting (when the barnyard grass in the field was 1.5 leaves old), and the control effect was investigated 25 days after the application. The results are listed in the following table:

[0029]

[0030] As can be seen from the table above, when the ratio of component A to component B is 1:15, it has good control effects on grass weeds, broadleaf weeds, and sedge weeds. When the dosage of component A is low, the control effect on broadleaf weeds and sedge weeds is slightly poor, and when the dosage of component B is low, the control effect on grass weeds is slightly poor.

[0031] In early May 2024, a small-scale efficacy test of this composition for direct-seeding rice fields was conducted in Yagu Village, Wanbao Town, Louxing District, Hunan Province. The pesticide was sprayed 12 days after rice sowing (when the barnyard grass in the field was 1.5 leaves old), and the control effect was investigated 20 days after the application. The results are listed in the following table:

[0032]

[0033] As can be seen from the table above, the three different ratios have good control effects on the three types of weeds due to the relatively high usage of component A and component B per unit area. Among them, the combination ratio of 1:13.33 has the best control effect.

[0034] The present invention creates a safe and efficient rice field weed control composition, which provides a reliable solution for controlling weeds in fields of various rice cultivation methods, especially solving the weed control problem in direct-seeding rice fields, and achieving excellent weed control effect, thereby saving a large amount of labor in rice planting and greatly improving agricultural labor efficiency and the economic benefits of rice planting.

[0035] The herbicidal composition of the present invention may include one or more safeners, which may be dissolved, dispersed, suspended or otherwise included in the composition. Suitable safeners are those listed in the Pesticide Handbook (ISBN-10: 190139686X). Exemplary safeners include mefenpyr-diethyl or furilazole.

[0036] In summary, the herbicidal composition of the present invention achieves the following significant beneficial effects by compounding iodosulfuron-methyl sodium salt with oxazithromycin and accurately controlling the weight ratio of the active ingredients of the two to be 1:1 to 1:200, with the optimal ratio being 1:20 to 1:60:

[0037] 1. Highly effective weed control: The combination has high efficiency in controlling the three major types of weeds in rice fields, especially showing excellent control effects on various common resistant weeds. This greatly improves the efficiency of farmland weed management and reduces crop yield losses caused by weed competition.

[0038] 2. Significant synergistic effect: The two herbicidal components of iodosulfuron-methyl sodium and oxazithromycin have a significant synergistic effect after compounding, making the combination show excellent control effect on grass weeds such as barnyard grass and lycopodii, as well as broadleaf and sedge weeds. This synergistic effect not only enhances the weed control effect, but also broadens the weed control spectrum.

[0039] 3. Long lasting effect, safe and environmentally friendly: The composition has a long lasting effect and can maintain the weed control effect for a long time, thereby reducing the frequency and amount of herbicide use. At the same time, the composition is environmentally friendly, will not pollute the soil and water, and will not affect the growth of the next crop, which is in line with the development trend of green and environmentally friendly modern agriculture.

[0040] In summary, the herbicidal composition of the present invention achieves multiple beneficial effects such as high efficiency in weed control, significant synergistic effect, long lasting effect, safety and environmental protection by accurately compounding iodosulfuron-methyl sodium salt and oxazithromycin and optimizing the weight ratio of their effective ingredients, and has significant technical advantages and application value.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A herbicidal composition, characterized in that Iodosulfuron-methyl sodium salt is compounded with oxazithromycin, and the weight ratio of the active ingredients of iodosulfuron-methyl sodium salt and oxazithromycin is 1:1 to 1:

200.

2. The herbicidal composition according to claim 1, characterized in that The optimal weight ratio of the active ingredients of iodosulfuron-methyl sodium salt and oxazithromycin is 1:20 to 1:

60.

3. The herbicidal composition according to claim 1, characterized in that The usage amount of the active ingredient of iodine sulfone methyl sodium salt is 0.75 to 15 grams per hectare.

4. The herbicidal composition according to claim 1, characterized in that The optimal usage amount of the active ingredient of iodine sulfone sodium salt is 1.5 to 7.5 grams per hectare.

5. The herbicidal composition according to claim 1, characterized in that The dosage of the active ingredient of oxazithromycin is 1.5 to 150 grams per hectare.

6. The herbicidal composition according to claim 1, characterized in that The optimal usage amount of the active ingredient of oxazithromycin per hectare is 15 to 90 grams.

7. The herbicidal composition according to claim 1, characterized in that Safener added.

8. The herbicidal composition according to claim 5, characterized in that Safeners include mefenpyr-butyl or furazolidone.

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