Mesotrione 104206-82-8

Technical to light yellow crystalline powder, melting point 165 ℃, the density of 1.47 g/ml (20 ℃) : 1.93 e-16 vapor pressure mmHg at 25 ° C [2]. Soluble in methylene chloride, acetonitrile and acetone, it is a kind of weak acid, pKa3.12 (20 ℃), due to its weak acid, so the degree of ionization owing to the different pH, water solubility is a pH dependent, from 20 ℃ was 2.2 g/L (pH4.8), 15 g/L (pH6.9) and 22 g/L (pH9.0), hydrolysis resistance when the pH4 ~ 9.

1. Applicable crops: corn

2. Control objects: annual broad-leaved weeds + some gramineae weeds (better control effect for broad-leaved weeds than gramineae)

Inhibits the activity of hydroxypyruvate dioxygenase (HPPD), which converts amino acid tyrosine into plasmid quinone. Plasmid quinone is a cofactor of the desaturase of octahydrolycopene. It is the key enzyme of carotenoid biosynthesis. After 3-5 days of use of methyl sulfordone, the plant meristem showed symptoms of yellowing and subsequently caused dry spots, which were spread throughout the whole plant two weeks later. It is weakly acidic, and in most acidic soils, it can be tightly adsorbed on organic materials. In neutral or alkaline soils, it exists in the form of non - absorbable anions. The higher the temperature, the better the effect of methyl sulfonone. Rainfall 1 h after application had no effect on the efficacy of methyl sulfordone.