Weeding composition containing oxadiazon, ametryn and diuron and application of weeding composition

Abstract

The invention provides a weeding composition containing foxacarb, ametryn and diuron, wherein the mass ratio of foxacarb to ametryn to diuron is 1: (10-20): (40-60). The weeding composition disclosed by the invention has a remarkable synergistic effect, can be used for remarkably improving the weeding effect of a medicament, reducing the dosage of the medicament, slowing down the generation of pesticide resistance and relieving environmental pollution, can be used for preventing and removing annual weeds of sugarcane, and has an excellent weeding effect.

Description

Technical Field

[0001] This invention belongs to the field of herbicides, specifically relating to a herbicidal composition comprising benzoxam, atrazine, and diuron, and its application. Background Technology

[0002] Benoxipyrone, a derivative of benzoxopyrone, exhibits significantly better control efficacy against broadleaf weeds such as lambsquarters, amaranth, field bindweed, retroflexus, dayflower, thistle, and eclipta prostrata than benzoxopyrone, with an efficacy approximately twice that of benzoxopyrone. Its control efficacy against purslane is also significantly better than benzoxopyrone, with an efficacy approximately 3.8 times that of benzoxopyrone. Its control efficacy against velvetleaf is comparable to that of benzoxopyrone. The development of benzoxipyrone has solved the problems of benzoxopyrone's poor efficacy against sedges, poor sustained control of broadleaf weeds, and poor tolerance to washout. The chemical structure of benzoxipyrone is as follows: The patent document CN202311455118.9 has been published.

[0003] Atrazine is a selective systemic herbicide. It is absorbed by the roots and leaves of plants, providing rapid weed control. A typical photosynthesis inhibitor, it is adsorbed by the soil at a depth of 0-5 cm, forming a herbicide layer that allows weeds to come into contact with the herbicide as they germinate. It is most effective against newly sprouted weeds. It is used for controlling annual weeds on sugarcane.

[0004] Diuron belongs to the substituted urea class of herbicides. It is a photosynthesis inhibitor that can be absorbed by plant roots or leaves, effectively controlling dicotyledonous, grassy, ​​and sedge weeds. It has good control effects on annual weeds in sugarcane fields.

[0005] Long-term use of herbicides alone can easily lead to the development of herbicide resistance in weeds and cause environmental pollution. Therefore, finding synergistic combinations that can improve herbicidal efficacy and reduce the dosage of active ingredients is a key research focus for many pesticide companies in China. Currently, there are no records of the combined use of benzalkonium chloride, atrazine, and diuron in existing technologies. Summary of the Invention

[0006] This invention provides a herbicidal composition containing benzoxam and its application. The herbicidal composition of this invention has a significant synergistic effect. The specific technical solution is as follows: A herbicidal composition comprising benzoxaprazole, wherein the active ingredients comprise benzoxaprazole, atrazine, and diuron, wherein the mass ratio of benzoxaprazole, atrazine, and diuron is 1:(10-20):(40-60).

[0007] Preferably, the mass ratio of benzoxaflutole, atrazine, and diuron is 1:20:(40-60); more preferably, the mass ratio of benzoxaflutole, atrazine, and diuron is 1:10:40, 1:10:60, 1:20:40, or 1:20:60.

[0008] The herbicidal composition of the present invention is mixed with pesticide excipients to prepare any formulation suitable for agricultural use; the total mass percentage of active ingredients is 5-90%.

[0009] The formulations described in this invention are suspensions, dispersible oil suspensions, water-dispersible granules, and wettable powders.

[0010] The herbicidal composition of the present invention is used for controlling weeds in sugarcane fields, especially annual weeds such as Cyperus rotundus, Bermuda grass, and Artemisia capillaris.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The herbicidal composition of this invention has a significant synergistic effect, which can significantly improve the herbicidal effect of the herbicide, reduce the dosage of the herbicide, slow down the development of pesticide resistance, and reduce environmental pollution. The herbicidal composition of this invention can be used for the control of annual weeds in sugarcane and has excellent herbicidal effect. Detailed Implementation The present invention can be better understood from the following embodiments. However, those skilled in the art will readily understand that the descriptions in the embodiments are for illustrative purposes only and should not, and will not, limit the scope of the invention as detailed in the claims. Example 1: Indoor bioassay of herbicide composition on bermudagrass The tested weed was Bermuda grass. Mature seeds were collected from the field and cultured and preserved in the laboratory.

[0012] Test reagents: benzoxam, atrazine, and diuron.

[0013] Experimental Method: A greenhouse pot method was used. The experimental soil was specially collected from untreated plots. The experimental soil was filled into flowerpots; the flowerpots were placed in a basin filled with water, and the soil was kept moist by bottom irrigation. A measured amount of Bermuda grass seeds were sown in the flowerpots, covered with 0.5cm of soil, and when the plants reached approximately the 3-leaf stage, foliar spraying was applied using a potter's sprayer, with each treatment repeated 4 times. After treatment, the plants were placed in a greenhouse under normal management, and the growth of the Bermuda grass was observed regularly. The fresh weight of the above-ground parts of the Bermuda grass was measured after 7 days, and the fresh weight inhibition rate was calculated.

[0014] The combined effect of the herbicidal compositions was evaluated. The measured fresh weight inhibition rate after compounding was denoted by E, and the theoretical fresh weight inhibition rate after compounding was denoted by E0.

[0015] When E–E0 > 10%, it has a synergistic effect; when E–E0 < -10%, it has an antagonistic effect; and when E–E0 is between -10% and 10%, it has an additive effect.

[0016] Results analysis: The ternary herbicidal composition exhibits different synergistic effects against Bermuda grass. When the mass ratio of benoxapazole, atrazine, and diuron is 3:(30-60):(120-180), it shows a significant synergistic effect on Bermuda grass; when the mass ratio is 3:(30-60):60 or 3:(30-60):60, it shows an additive effect on Bermuda grass. When the herbicidal composition is a synergistic composition, it can significantly improve the herbicidal effect of the pesticide, reduce the dosage, slow down the development of pesticide resistance, and reduce environmental pollution.

[0017] Table 1. Indoor bioassays of herbicidal compositions on Bermuda grass

[0018] Example 2: Field control efficacy of the herbicidal composition against weeds in sugarcane fields.

[0019] Experimental crop: sugarcane.

[0020] Field weeds: Cyperus rotundus, Bermuda grass, and Ageratum conyzoides.

[0021] Test reagents: Agent 1: 51% Benoxachlor·Atrazine·Diuron wettable powder (Contains the following ingredients by weight percentage: 1% benzylpyridin, 10% atrazine, 40% diuron, 8% sodium lignosulfonate, 4% dispersant NNO4, 3% silica, and bentonite to make up 100%).

[0022] Agent 2: 40.5% Benoxachlor·Atrazine·Diuron wettable powder (Contains the following ingredients by weight percentage: 0.5% benzylpyridin, 10% atrazine, 30% diuron, 5% sodium lignosulfonate, 3% dispersant NNO3, 5% silica, and bentonite to make up 100%).

[0023] Application method: A pesticide treatment and a blank control were set up, with four replicates; each plot was 25 m², randomly arranged. Targeted foliar spraying was used. Weed fresh weight control efficacy was assessed 14 days after application.

[0024] Results analysis: Agent 1-2 has a good control effect on sugarcane weeds; when the effective ingredient dosage is 40g / mu, the control efficacy is over 92%; it can effectively control weeds in the field.

[0025] Table 2. Control efficacy of the herbicidal composition against sugarcane weeds.

[0026] The above description is only a preferred embodiment of the present invention. For those skilled in the art, appropriate improvements can be made without departing from the original material of the present invention, and these improvements are also within the protection scope of the present invention.

Claims

1. A herbicidal composition comprising benzoxam, characterized in that, The active ingredients include benzoxadiazon, atrazine, and diuron, with a mass ratio of 1:(10-20):(40-60).

2. The herbicidal composition according to claim 1, characterized in that, The mass ratio of benzoxam, atrazine, and diuron is 1:20:(40-60).

3. The herbicidal composition according to claim 1, characterized in that, The mass ratio of benzylpyridin, atrazine, and diuron is 1:10:40, 1:10:60, 1:20:40, or 1:20:

60.

4. The herbicidal composition according to any one of claims 1-3, characterized in that, The herbicidal composition is mixed with pesticide excipients to prepare any formulation suitable for agricultural use.

5. The herbicidal composition according to claim 4, characterized in that, The total mass percentage of active ingredients is 5-90%.

6. The herbicidal composition according to claim 5, characterized in that, The formulation is a water-dispersible granule, a wettable powder, a suspension concentrate, or a dispersible oil suspension.

7. Use of the herbicidal composition according to any one of claims 1-6 for controlling weeds in sugarcane fields.

8. The use according to claim 7, characterized in that, The weeds mentioned are annual weeds.

Images