Results 151 to 160 of about 4,530 (200)

Enantioselectivity of racemic metolachlor andS-metolachlor in maize seedlings

Journal of Environmental Science and Health, Part B, 2010
Chiral 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
openaire   +2 more sources

Comparative toxicity of racemic metolachlor and S-metolachlor to Chlorella pyrenoidosa

Aquatic Toxicology, 2009
The 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
openaire   +2 more sources

Microbial adsorption of cyanazine and metolachlor

Journal of Environmental Science and Health, Part B, 1998
A 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, R J, Maguire, Y L, Lau, G J, Pacepavicius, H, Okamura, I, Aoyama   +5 more
openaire   +2 more sources

Metabolism of Metolachlor by Fungal Cultures

Journal of Agricultural and Food Chemistry, 2002
Metabolism 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
openaire   +2 more sources

Metolachlor and Atrazine in the Great Lakes

Environmental Science & Technology, 2010
Concentrations 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, Derek C G, Muir, Terry F, Bidleman, Jeff, Small, Sean, Backus, Alice, Dove   +5 more
openaire   +2 more sources

Comparative phytotoxicity ofRac-metolachlor andS-metolachlor on rice seedlings

Journal of Environmental Science and Health, Part B, 2012
The 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
openaire   +2 more sources

Soil dissipation and biological activity of metolachlor and S‐metolachlor in five soils

Pest Management Science, 2006
AbstractThe resolved isomer of metolachlor, S‐metolachlor, was registered in 1997. New formulations based primarily on the S‐metolachlor isomer are more active on a gram for gram metolachlor basis than formulations based on a racemic mixture of metolachlor containing a 50:50 ratio of the R and S isomers.
Dale L, Shaner, Galen, Brunk, David, Belles, Phil, Westra, Scott, Nissen   +4 more
openaire   +2 more sources

Microbial transformation of metolachlor

Environmental Toxicology and Water Quality, 1995
AbstractMetolachlor is an important selective herbicide used for the control of several annual grassy weeds and certain broad‐leafed weeds in corn, soybean, peanut, and other crops. It is the most heavily used agricultural pesticide in Ontario. There is, however, very little information in the open literature on the aquatic fate and persistence of ...
D. Liu, R. J. Maguire, G. J. Pacepavicius, I. Aoyama, H. Okamura   +4 more
openaire   +1 more source

Environmental Fate of Alachlor and Metolachlor

1989
Decision-makers, scientists, and the interested public should be informed what future research and education is needed if a strong pesticide regulatory program is imposed. Recommendations are intended to highlight research gaps. Some may be of general concern and apply to many pesticides.
G, Chesters, G V, Simsiman, J, Levy, B J, Alhajjar, R N, Fathulla, J M, Harkin   +5 more
openaire   +2 more sources

Adsorption and Desorption of Metolachlor and Metolachlor Metabolites in Vegetated Filter Strip and Cultivated Soil

Journal of Environmental Quality, 2004
ABSTRACTPrevious studies have indicated that dissolved‐phase metolachlor [2‐chloro‐N‐(2‐ethyl‐6‐methylphenyl)‐N‐(methoxy‐1‐methylethyl)acetamide] transported in surface runoff is retained by vegetative filter strips to a greater degree than either metolachlor oxanilic acid [2‐[(2‐ethyl‐6‐methylphenyl)(2‐methoxy‐1‐methylethyl)amino]‐2‐oxoacetic acid ...
L J, Krutz, S A, Senseman, K J, McInnes, D W, Hoffman, D P, Tierney   +4 more
openaire   +2 more sources