Results 131 to 140 of about 3,472 (173)

Parathion and methyl parathion toxicity to insecticideresistant and susceptible mosquitofish(Gambusia affinis)

Bulletin of Environmental Contamination and Toxicology, 1974
This study determined the toxicity of parathion and methyl parathion to organochlorine compound-resistant and -susceptible populations of mosquitofish (Gambusia affinis). Mosquitofish can tolerate about 40 times more methyl parathion than parathion.
J E, Chambers, J D, Yarbrough
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Dissipation of methyl parathion and ethyl parathion from cotton foliage as affected by formulation

Bulletin of Environmental Contamination and Toxicology, 1987
Insecticide use on cotton has shifted away from the organochlorine compounds toward the organophosphate, carbamate and pyrethroid compounds. These latter three groups of compounds are generally less environmentally persistent and frequently more selective than the organochlorine compounds.
S, Smith, G H, Willis, L L, McDowell, L M, Southwick   +3 more
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A Study on the Environmental Degradation of Pesticides Azinphos Methyl and Parathion Methyl

Journal of Environmental Science and Health, Part B, 2004
The effect of environmental parameters (temperature and relative humidity) on the degradation rate of azinphos methyl and parathion methyl was studied. Proprietary emulsifiable concentrates were diluted and added to each of 90 glass Petri dishes for each pesticide and were left overnight to dry.
Panagiotis E, Athanasopoulos, Nikolaos V, Kyriakidis, Panagiotis, Stavropoulos   +2 more
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METHYL PARATHION: EPA'S CHALLENGE

Chemical & Engineering News Archive, 1997
In the past few months, state and federal officials have begun to take strong action to correct what they call "the worst case of pesticide misuse in U.S. history." So far, in Mississippi and neighboring states, officials have identified about 2,700 houses that have been sprayed with methyl parathion for cockroach control (C&EN, Dec. 16, 1996, page 28).
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FATE OF METHYL PARATHION IN AQUATIC CHANNEL MICROCOSMS

Environmental Toxicology and Chemistry, 1983
Abstract The fate of methyl parathion and the development of biological communities were examined as a function of inorganic nutrient enrichment, inorganic nutrients plus glycerol and presence of sediments in two eight-compartment, continuous-flow channel microcosms.
H. W. Holm, H. P. Kollig, W. R. Payne, L. M. Proctor   +3 more
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Kinetic analysis of the fate of methyl parathion in the dog

Archives of Toxicology, 1980
Methyl parathion (1, 3, 10 and 30 mg.kg-1) was injected intravenously in dogs and the serum concentrations were followed in function of time. For each dose the serum level data were fitted to a two- or tri-exponential equation by means of a non-linear least-squares regression analysis computer program. During the first hours after injection a rapid and
R A, Braeckman, M G, Godefroot, G M, Blondeel, F M, Belpaire, J L, Willems   +4 more
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Residues of parathion, methyl parathion, EPN, and their oxons in Canadian fruits and vegetables

1964
The three p-nitrophenyl thiophosphates, parathion, methyl parathion, and EPN are highly effective insecticides. Parathion, developed by G. Schrader in 1944, is very widely used in many countries. Methyl parathion is being used interchangeably and in conjunction with parathion in some countries, while the amounts of EPN are relatively small compared to ...
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Removal of Methyl Parathion in Water, by Dugesia dorotocephala

Bulletin of Environmental Contamination and Toxicology, 2009
The aim of this study was to determine the efficiency of Dugesia dorotocephala on Methyl parathion removal. An initial concentration of 1.25 microg mL(-1) of MeP was used to evaluate the removal capacity of planarian. A first-order removal kinetics was obtained with a disappearance rate constant (k(r)) of 0.49 days(-1) and 69% efficiency on contaminant
A, Amaya-Chávez, E, López-López, M, Galar-Martínez, L M, Gómez-Oliván, M M, García-Fabila   +4 more
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Comparative Insecticidal Value of EPN, Methyl Ethyl Parathion, Methyl Parathion, and Parathion

Journal of Economic Entomology, 1952
G. T. Bottger, A. P. Yerington
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Pharmacokinetics and pharmacodynamics of methyl parathion.

Zhonghua yi xue za zhi = Chinese medical journal; Free China ed, 2002
Methyl parathion and other organophosphorus insecticides are widely used in agriculture. Poisonings to this class of compounds are common and exerted primarily through inhibition of acetylcholinesterase. Methyl parathion became a major health concern when it was illegally sprayed in private homes.
Robert E, Kramer, Ing K, Ho
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