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  • The allethrins are a pair of related synthetic compounds used in insecticides. They are synthetic pyrethroids, a synthetic form of a chemical found naturally in the chrysanthemum flower.
  • Allethrin is a racemic mixture of 8 stereoisomers. d-allethrin is > 95% (1R)-isomers and > 75% trans isomers.


  • It is estimated that several hundred tonnes of allethrin, d-allethrin, bioallethrin, esbiothrin, and S-Bioallethrin are manufactured and used yearly throughout the world, mainly for the control of household insects.
  • Groups of ten female adult houseffies, under cyclopropane anaesthesia, were treated topically on the dorsal thorax with doses varying from 0 6 to 12-0 Ag. of [14C]allethrin/fly in 1pl. of A.R. acetone.


  • Alphacypermethrin is a highly active synthetic pyrethroid insecticide, piperonyl butoxide acts as a synergist and D-trans allethrin is a knockdown agent.
  • The allethrin causes hyper-activation of the insect and ultimately increased uptake of the insecticidal spray.
  • Allethrin pesticide was the first of the pyrethroids widely produced as an insecticide This synthetic compound is used almost exclusively in homes and gardens for control of flies and mosquitoes.
  • Products containing active ingredients, such as, acephate, allethrin, bifenthrin, bioallethrin, carbaryl, cyfluthrin, deltamethrin, esfenvalerate, imidacloprid, malathion, permethrin, phenothrin, pyrethrins, resmethrin and tetramethrin are labeled for treating ants.


  • The output of the national pesticides such as allethrin was 61,000 tons altogether, increased by 6.83% in some period and dropped by 3.17% compared with last month of same period.
  • On the basis of the review of current insecticide products and sales trends, several insecticides and two synergists were added to the candidate list: acephate, aldicarb, allethrin and related pesticides (d-allethrin, d-trans allethrin, S-bioallethrin, prallethrin, and esbiothrin), clarified hydrophobic extract of Neem oil, lambda cyhalothrin, tetramethrin, tralomethrin, n-octyl bicycloheptene dicarboximide, and piperonyl butoxide (PBO).

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