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  • Parathion-methyl, also known as methyl parathion or dimethyl parathion.
  • Methyl parathion, sometimes called "cotton poison," is a chemical pesticide that should be used only in open fields to control insects.
  • Methyl parathion was originally developed by the German pesticide company Bayer. It is a non-systemic pesticide that kills pests by acting as a stomach poison.


  • Methyl parathion hydrolase mph gene was cloned from a novel bacterium Pseudomonas stutzeri HS-D36.
  • Methyl parathion comes in two forms: a pure form of white crystals and a technical-grade solution (brownish liquid), which contains methyl parathion (80%) and inactive ingredients in a solvent.
  • A simple, rapid and sensitive colorimetric dipstick assay for the detection of the organophosphorous insecticide methyl parathion (MPT) residue in vegetables.


  • Field populations of western corn rootworm, Diabrotica virgifera virgifera LeConte, were collected from three different sites in Nebraska. Adult bioassays of these three populations were conducted with different concentrations of
    methyl-parathion and at a diagnostic concentration (1.0 g/ml) to determine resistance levels among these populations.
  • The cholinergic system has been proposed to participate in the development of dependence on opioids this examined the effects of dermal pretreatment with methyl parathion (MP), an acetylcholinesterase inhibitor, on the development of physical dependence on morphine.


  • The Agency for Toxic Substances and Disease Registry analyzed concurrently collected data on environmental methyl parathion (MP) and urinary p-nitrophenol (PNP) at the request of the U.S.Environmental Protection Agency (U.S. EPA).

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