Results 161 to 170 of about 5,658 (218)
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Enantioselective Degradation of Rac-Metolachlor and S-Metolachlor in Soil
Pedosphere, 2006ABSTRACT Separation of chiral enantiomers and the dissipation of rac-metolachlor and S-metolachlor in soil were evaluated using achiral high-performance liquid chromatography (HPLC) and chiral gas chromatography (GC) methods. Under the experimental conditions the possible metabolite was considered to be N-(2-ethyl-6-methyl-phenyl)-2-hydroxy-acetamide.
Yun MA, Wei-Ping LIU, Yue-Zhong WEN
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Enantioselectivity of racemic metolachlor andS-metolachlor in maize seedlings
Journal of Environmental Science and Health, Part B, 2010Chiral herbicides may have enantioselective effects on plants. In this study, we assessed and compared the enantioselectivity of the chiral herbicides rac-metolachlor and S-metolachlor to maize seedlings. The superoxide dismutase activity (SOD) activity of roots and stem leaves treated by rac-metolachlor was 1.38 and 1.99 times that of roots and stem ...
Fei, Xie, Hui J, Liu, Wei D, Cai
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Comparative toxicity of racemic metolachlor and S-metolachlor to Chlorella pyrenoidosa
Aquatic Toxicology, 2009The toxicity of the chiral herbicides rac-metolachlor and S-metolachlor to Chlorella pyrenoidosa was determined and compared in this study, based on four different test endpoints: the growth inhibition rate, the chlorophyll a and chlorophyll b concentration, the catalase activity, and the ultrastructural morphology of cells.
Huijun, Liu, Mingyu, Xiong
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Microbial adsorption of cyanazine and metolachlor
Journal of Environmental Science and Health, Part B, 1998A laboratory experiment was performed to study the role of microorganisms in producing the non-extractable residues by anaerobically incubating cyanazine (2-[[4-chloro-6-(ethylamino)-1,3,5,-triazin-2-yl]-amino]-2-methoxy -l- methylethyl)acetamide] and metolachlor [2-chloro-N-(2-ethyl-6-methoxy-l- methylethyl)acetamide] in culture media that had been ...
D, Liu +5 more
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Metabolism of Metolachlor by Fungal Cultures
Journal of Agricultural and Food Chemistry, 2002Metabolism of metolachlor was studied using a mixed fungal culture isolated from a metolachlor-acclimated field soil. The culture rapidly degraded metolachlor with a half-life of 3.5 days in broth. Aspergillus flavus and A. terricola purified from the mixed culture also metabolized metolachlor effectively.
D, Sanyal, G, Kulshrestha
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Metolachlor, S-metolachlor and their role within sustainable weed-management
Crop Protection, 1998Abstract The herbicide metolachlor has been widely used for over 20 years for selective weed control in more than 70 crops worldwide. Its favourable soil behaviour and low risk for developing weed resistance means that metolachlor integrates well into sustainable weed-management practices, such as conservation tillage.
Peter J. O'Connell +2 more
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Metolachlor and Atrazine in the Great Lakes
Environmental Science & Technology, 2010Concentrations of atrazine and metolachlor and stereoisomer fractions (SF = herbicidally active/total stereoisomers) of metolachlor were determined in 101 surface water samples collected from the five Laurentian Great Lakes in 2005-2006. Geometric mean (GM) concentrations of atrazine ranged from 5.5 to 61 ng L(-1), decreasing from lakes Ontario ...
Perihan B, Kurt-Karakus +5 more
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Comparative phytotoxicity ofRac-metolachlor andS-metolachlor on rice seedlings
Journal of Environmental Science and Health, Part B, 2012The toxicity of Rac-metolachlor and S-metolachlor on rice (IIYou92, Oryza sativa L.) seedlings was determined and compared in a hydroponics experiment. The elongation of shoot, main root, and the number of lateral roots were inhibited in both Rac- and S-metolachlor treatments.
Hui J, Liu, Ming Y, Xiong, Bao L, Tian
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