malathion

noun

1. (countable, uncountable)An organophosphorus insecticide, Diethyl [(dimethoxyphosphinothioyl)-thio]butanedioate.

   “"Although effective in degrading pesticides with P-O bonds, washing of the vegetables sprayed with the thiolester organophosphate insecticide malathion with the enzyme did not yield any improved degradation."”

   “Ecoparasite control, with appropriate concentrations of carbaryl, malathion, or pyrethrin dusts, is permissible if the agent is applied externally to both test and control animals not less than seven days prior to the start of the test.”