Rainbow obtained the patent of OD formulation containing Metamifop and Bispyribac-sodium and its method

On January 26, 2024, according to the announcement of the State Intellectual Property Office, Shandong Rainbow obtained an invention patent entitled "a OD containing Metamifop and Bispyribac-sodium and its preparation method", the authorization announcement number CN114586776B, the application date is March 2022.

The patent abstract shows that the invention provides a OD containing Metamifop and Bispyribac-sodium, which comprises: active ingredient, emulsifier, rheological agent, solvent and dispersion medium; The active ingredients include Metamifop and Bispyribac-sodium. The invention reformulates the OD with Metamifop and Bispyribac-sodium, and overcomes the disadvantages of poor stability of the traditional OD through fine screening of the formula, and has the advantages of significant drug effect, long duration and high suspension rate. At the same time, the use of safe and environmentally friendly solvents, product quality is stable, safe and low toxicity, environmental protection. This mixture is a post-seedling herbicide of rice, and has a good control effect on annual weeds, especially resistant weeds. Compared with Metamifop and Bispyribac-sodium, the weed control effect is significantly improved and the improvement of weed resistance is greatly delayed.

Metamifop is an herbicide. Its mechanism of action is to inhibit Acetyl CoA carboxylase, and the active ingredient needs to reach the target in plants to play the role of killing grass. The solvents and surfactants will soften the wax layer of the leaf surface and open the stomata of the plant respectively, so that the active ingredients can enter the plant body to play a role. The main control of most of the annual grass weeds in the transplanting and live field, such as barnyard grass, Moleplant seed, Crab grass and goosegrass, the control effect reached more than 95%.

Bispyribac-sodium is a benzoic acid herbicide and a highly active Acetolactate Synthase (ASL) inhibitor. After spraying on weeds, Bispyribac-sodium can be quickly absorbed by the stems and leaves of weeds, and transmitted to the whole plant, inhibiting the growth of plant meristem and killing weeds, with high efficiency, broad spectrum and low dosage. Bispyribac-sodium can effectively control Barnyard grass and other grass weeds in paddy field, as well as most broad-leaved weeds, some sedge weeds and barnyard grass resistant to other herbicides.

The mixture of Metamifop and Bispyribac-sodium in the appropriate ratio can not only improve the pesticide effect, reduce the dosage, save the economic cost, and reduce the residue of the pesticide in the environment. At the same time, it can also delay the generation of weed resistance, extend the service life of the agent, and by adding additives, it can extend the efficacy time and improve the weeding effect in high or low temperature environment.

OD has the advantages of environmental friendliness, high efficacy, no need for barrel mixing additives, and easy to use, but the OD products involving Metamifop and Bispyribac-sodium generally have the disadvantages of high long-term storage decomposition rate, poor stability, and high cost, and problems such as stratification and bottom formation will occur during long-term storage or transportation. In view of this, the invention provides a OD containing Metamifop and Bispyribac-sodium.