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pyrethrin

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py·re·thrin  (p-rthrn, -rthrn)
n.
Either of two viscous liquid esters, C21H28O3 or C22H28O5, that are extracted from pyrethrum flowers and used as insecticides.
[pyrethr(um) + -in.]
pyrethrin [paɪˈriːθrɪn]
n
1. (Chemistry / Elements & Compounds) Also called pyrethrin I an oily water-insoluble compound used as an insecticide. Formula: C21H28O3
2. (Chemistry / Elements & Compounds) Also called pyrethrin II a compound of similar chemical structure and action, also found in pyrethrum. Formula: C22H28O5
[from pyrethrum + -in]
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Cattle were treated with a commercially available Pyrethrin insecticide pouron (1% lambdacyhalothrin) 2 wk before the study.
CASE STUDY: Impact of Horn Flies, Haematobia irritans (L.) (Diptera: ... by H T Boland and G PAS Scaglia and K Umemura / Professional Animal Scientist
Lindane was less effective than prescription malathion, and over the counter pyrethrin and permethrin.
Treatment for Head Lice, Causes, Symptoms by Peter rodrick / Health, general community
pipiens (8), indicate that aerial application of pyrethrin in 2005 successfully disrupted the WNV transmission cycle, and that this treatment was responsible for an abrupt decrease in the number of human cases within treated areas compared with that in the untreated area.
Efficacy of aerial spraying of mosquito adulticide in reducing ... by Carney, Ryan M.; Husted, Stan; Jean, Cynthia; Glaser, Carol; Kramer, Vicki / Emerging Infectious Diseases
 
 
 
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