Dissipation and residue of S-metolachlor in maize and soil.
The purpose of this article was to establish a simple residue analysis method for S-metolachlor in maize and to study its dissipation and residue in maize field eco-system. The results showed that S-metolachlor declined rapidly in maize seedling and soil after application. The half-lives of S-metolachlor in maize seedlings in Beijing and Changchun were 6.68 and 4.85 days, respectively, and in soil were 12.81 and 14.81 days, respectively. The terminal residues of S-metolachlor in soil samples were very low (around 0.005-0.045 mg/kg), and the residues in maize seeds were not detectable. The use of S-metolachlor according to the recommended dosages in maize could be considered safe.
Cao
Pengying
P
Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100094, China.
Wang
Xiangyun
X
Liu
Fengmao
F
Zhao
Ercheng
E
Han
Lijun
L
D000081:Acetamides / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D006540:Herbicides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D003313:Zea mays / Q000737:chemistry*
D000081:Acetamides; D006540:Herbicides; D010573:Pesticide Residues; D012987:Soil; D012989:Soil Pollutants; C051786:metolachlor