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Related to pyrethrin: permethrin


 (pī-rē′thrĭn, -rĕth′rĭn)
Either of two viscous liquid esters, C21H28O3 or C22H28O5, that are extracted from pyrethrum flowers and used as insecticides.


1. (Elements & Compounds) Also called: pyrethrin I an oily water-insoluble compound used as an insecticide. Formula: C21H28O3
2. (Elements & Compounds) Also called: pyrethrin II a compound of similar chemical structure and action, also found in pyrethrum. Formula: C22H28O5
[C19: from pyrethrum + -in]


(paɪˈri θrɪn, -ˈrɛθ rɪn)

either of two chemicals, C21H28O3 or C22H28O5, extracted from pyrethrum flowers: used as an insecticide.
[1830–40; pyrethr (um) + -in1]


n piretrina
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References in periodicals archive ?
Our last tip is to treat doors and windows with pyrethrin spray which is an insecticide that you can buy that will keep the little ones away.
According to Zhang's tests, methyl benzoate is 5 to 20 times more toxic to eggs of BMSB, diamondback moth, and tobacco hornworm than a conventional pyrethroid insecticide, a sulfur and pyrethrin mixture, and some organic products currently on the market.
Fatal asthma in a child after use of an animal shampoo containing pyrethrin.
Second, purchase two cans of an aerosol wasp and hornet killer, preferably one that uses pyrethrin as an active ingredient.
Permethrin is a synthetic pyrethroid similar to the pyrethrin extracts of pyrethrum flowers (Casida et al.
Sometimes using a combination product (either multiple pyrethroid or pyrethrin active ingredients, or one that combines different chemical classes into the same product) can improve bed bug control.
pesticides and insecticides (organaphospahte, carbamate, pyrethrin group etc.
The chemical pyrethrin, a neurotoxin, is used in most of the over-the-counter lice treatment products.
Oral prophylactic antibiotic therapy with cephalexin (33 mg/kg PO ql2h for 28 days) and enrofloxacin, and topical application of pyrethrin fly-repellent ointment around the periphery of the wound was started.
PPB works similarly to permethrin, but the addition of piperonyl butoxide prevents the metabolism of pyrethrin by lice, increasing killing time, and therefore, making it more effective (Eisenhower & Farrington, 2012).
Biosynthesis of pyrethrin I in seedlings of Chrysanthemum cinerariaefolium.