Missible oil preparation of rice herbicide

Abstract

The invention relates to a missible oil preparation of a rice herbicide. The rice herbicide comprises effective active ingredients of pentoxazone and pyraflufen-ethyl, thus being wide in herbicide controlling spectrum by the blending of the pentoxazone and the pyraflufen-ethyl; according to the rice herbicide, the effective ingredients are matched within a certain range, so that the synergistic effect is good, the prevention effect of the rice herbicide is higher than that of a single preparation, and the medicinal maintain time is long; the rice herbicide is very safe for rice.

Description

technical field [0001] The invention belongs to the field of pesticides, in particular to a rice herbicide emulsifiable concentrate preparation. Background technique [0002] Cyclopentazone, chemical name 3-(4-Chloro-5-cyclopentyloxy-2-fluorophenyl)-5-isopropylene-1,3-oxazoline-2,4-dione , the structural formula , belonging to oxazolones, the pure product is a colorless, odorless powdery solid; melting point 104°C; density 1.418 (25°C); vapor pressure <1.11×10-5Pa (25°C). Partition coefficient LogP=0.67; solubility in water is 0.216 mg / l (25°C); stable to light, heat and acid, unstable to alkali. It is mainly used to control barnyard grass and annual weeds. Using p-fluorophenol as the starting material, through chlorination, esterification and nitration to obtain intermediate substituted nitrobenzene; through hydrolysis to obtain intermediate substituted phenol potassium salt; and then through etherification and reduction to obtain substituted aniline ; Finally, afte...

AI Technical Summary

Problems solved by technology

[0004] After the above two drugs are used alone for a long time, it is easy to cause the plant pathogens to develop drug resistance, resulting in problems such as increased dosage, reduced control effect, and shortened duration, which is not conducive to sustainable development of the environment.