High-stability herbicide for paddy field and preparation method thereof

Abstract

The invention discloses a high-stability herbicide for paddy fields, which is prepared from the following components in percentage by mass: 10 to 15 percent of pyriminobac-methyl, 10 to 12 percent of pretilachlor, 4 to 9 percent of bensulfuron methyl, 5 to 8 percent of inorganic salt, 0.2 to 0.5 percent of sodium dodecyl benzene sulfonate, 0.5 to 2.5 percent of fulvic acid, 0.5 to 1.5 percent of dispersing agent, 0.2 to 0.8 percent of antifreeze agent, 1 to 4 percent of hydrotalcite-like carrier, 0.4 to 1.2 percent of thickening agent, 0.5 to 1 percent of binding agent, 10 to 15 percent of water and the balance of oily solvent, the sum of the mass percentages of the components is 100%. The invention also discloses a preparation method of the herbicide. According to the weeding composition, pyriminobac-methyl, pretilachlor and bensulfuron methyl are used as active components, and after compounding, the pesticide resistance of weeds is slowed down through the synergistic effect of different effective components; in addition, by adding the anti-freezing agent, the thickening agent and the dispersing agent, the stability of the herbicide is improved, and it is guaranteed that all performance indexes meet the requirements within the period of validity.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of agricultural medicines, and in particular relates to a herbicide with high stability for paddy fields, and also relates to a preparation method of the herbicide for paddy fields. Background technique [0002] Weeds in paddy fields compete with rice for fertilizer, glory, and space, resulting in poor growth of rice and a decline in yield and quality, which has become one of the main factors affecting rice production. In recent years, with the change of grass phase of weeds in paddy fields, it is more and more difficult to control weeds. At present, there are nearly 40 species of weeds in paddy fields, and the grass weeds with high occurrence frequency include barnyard grass, Qianjinzi, paspalum, Lishihe, weedy rice, and false rice; Cyperaceae weeds include sedge , water three-edge, firefly (tuber and seed propagation), water sedge, flat stalk grass, cow hair grass; Arrowhead mus...

AI Technical Summary

Problems solved by technology

[0003] At present, commonly used herbicides are organic compounds. For example, Chinese patent (application number: 201910349960.1, publication number: CN110024788A) discloses a herbicide compounded with bicyclic sulcotrione for paddy fields, including bicyclic sulcotrione, pretilachlor, and diclofenac. Ether, adjuvant and carrier, using a compound herbicide, overcomes the deficiency that bicyclic sulcotrione has a poor control effect on broad-leaf grass. The herbicide has a wide range of herbicides and a small amount of herbicides, but its herbicide speed is relatively slow , and not easy to degrade

Chinese patent (application number: 201710284574.X, publication number: CN106973918A) discloses a herbicide composition containing oxaziclozone and promethachlor and its application, including oxaziclozone and promethachlor, the The control effect of herbicides is better than the activity when used alone, slowing down the emergence of weed resistance, and is safe for crops; however, this type of herbicide has a single active component, which cannot meet the weeding during the entire growth process of rice, and the active component is prone to occur failure, poor stability

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