What's the difference between pyrethrin and pyrethrine?
Pyrethrin
Definition:
(n.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor.
Example Sentences:
(1) The responses of nine strains of Musca domestica to treatment with cyromazine, trichlorphon, methomyl and pyrethrins with piperonyl butoxide were measured.
(2) By the administration of radioactively labelled compounds, the metabolic products of pyrethrin I, pyrethrin II, and allethrin in the rat have been identified.
(3) The pyrethroids (pyrethrin, permethrin and resmethrin) and the insect growth regulators (diflubenzuron and methoprene) were not inhibitory to the various developmental stages of isolate E9.
(4) From 23 samples trapped in various localities and subsequently reared in the laboratory, susceptibilities were measured against lindane, pyrethrin + PBO, trichlorfon, dichlorvos, and propoxur, the most used insecticides against cockroaches in our country.
(5) The history and development of pyrethrum, the natural pyrethrins and synthetic pyrethroids and their insecticidal properties, chemical structure and toxic and allergic side-effects are reported.
(6) The order of toxicity for males and nongravid females was pyrethroids greater than pyrethrins = organophosphates (except malathion) greater than carbamates = amidinohydrazone.
(7) The toxicity of natural pyrethrins and five pyrethroids was determined with coho salmon (Oncorhynchus kisutch), steelhead trout (Salmo gairdneri), fathead minnow (Pimephales promelas), channel catfish (Icatlurus punctatus), bluegill (Lepomis macrochirus), and yellow perch (Perca flavescens).
(8) There is considerable scope for developing new non-persistent insecticides with little hazard for man and mammals by modifying the structures of the natural pyrethrins.
(9) The following substances were added to Sabouraud glucose (2%) agar at concentrations of 0.1 and 1.0%: gamma benzene hexachloride (lindane), N-ethyl-o-crotonyltoluide, pyrethrins, dieldrin N,N-diethyl-m-toluamide, benzyl benzoate, and--as popular household remedies--Eau de Cologne, neutral soap and garlic.
(10) Survival of ticks treated with pyrethrin, resmethrin, and etophenprox was very low.
(11) Separation was best on an OV-25 column with temperature programming; The chemical ionization mass spectra for the 6 esters as well as for the thermally isomerized pyrethrins I and II are reported and discussed.
(12) The pyrethrins-resistant strain, selected with fenvalerate, quickly became resistant to allethrin, permethrin, phenothrin, and fenvalerate.
(13) The pyrethrins, constituents with insecticidal activity, derived from certain Chrysanthemum species and often suspected as the causative agents, play no role in chrysanthemum allergy.
(14) Laboratory bioassays with Culicoides variipennis larvae from Borax Lake, CA, indicated an LC90 of 16.8 ppb for pyrethrins at 23 degrees C. A field test in a pond adjoining the lake reduced adult C. variipennis emergence greater than 99% for over 30 days after treatment at a rate of 131 ppb pyrethrins.
(15) Cellular effects of pyrethrin and pyrethroid insecticides have been postulated to involve interactions with sodium channels, receptor-ionophore complexes, neurotransmitters, and ATPases.
(16) A recently introduced nonprescription liquid pediculicide, whose major ingredient is 0.3% pyrethrins synergized by 3.0% piperonyl butoxide (RiD), was compared for efficacy and safety with a prescription-only pediculicidal lotion whose major ingredient is 1% gamma-benzene hexachloride (Kwell).
(17) Pyrethrins applied topically before infestation significantly reduced the mean numbers of poultry red mites found in both budgerigar and pigeon trap perches, over those in untreated controls (P = less than 0.01).
(18) Space sprays with Pyrenone (pyrethrins) killed greater than 86% of all insects exposed to the spray path except for the newly colonized flies (1% mortality); mortality of insects protected under straw was low (less than 12%) except for S. cameroni (76%).
(19) An open study was conducted to determine how widespread head lice infestations were among preschool and elementary school children in Sacramento County and to see how effective a newly marked ever-the-counter pediculicide containing 0.3% pyrethrins synergized by 3.0% piperonyl butoxide was.
(20) Trap perches were utilised to quantify mite recoveries during efficacy tests of pyrethrin formulations against experimental infestations of Dermanyssus gallinae (De Geer, 1778) in budgerigars and pigeons, and to monitor mite recoveries from untreated canaries.
Pyrethrine
Definition:
(n.) An alkaloid extracted from the root of the pellitory of Spain (Anacyclus pyrethrum).
Example Sentences:
(1) The responses of nine strains of Musca domestica to treatment with cyromazine, trichlorphon, methomyl and pyrethrins with piperonyl butoxide were measured.
(2) By the administration of radioactively labelled compounds, the metabolic products of pyrethrin I, pyrethrin II, and allethrin in the rat have been identified.
(3) The pyrethroids (pyrethrin, permethrin and resmethrin) and the insect growth regulators (diflubenzuron and methoprene) were not inhibitory to the various developmental stages of isolate E9.
(4) From 23 samples trapped in various localities and subsequently reared in the laboratory, susceptibilities were measured against lindane, pyrethrin + PBO, trichlorfon, dichlorvos, and propoxur, the most used insecticides against cockroaches in our country.
(5) The history and development of pyrethrum, the natural pyrethrins and synthetic pyrethroids and their insecticidal properties, chemical structure and toxic and allergic side-effects are reported.
(6) The order of toxicity for males and nongravid females was pyrethroids greater than pyrethrins = organophosphates (except malathion) greater than carbamates = amidinohydrazone.
(7) The toxicity of natural pyrethrins and five pyrethroids was determined with coho salmon (Oncorhynchus kisutch), steelhead trout (Salmo gairdneri), fathead minnow (Pimephales promelas), channel catfish (Icatlurus punctatus), bluegill (Lepomis macrochirus), and yellow perch (Perca flavescens).
(8) There is considerable scope for developing new non-persistent insecticides with little hazard for man and mammals by modifying the structures of the natural pyrethrins.
(9) The following substances were added to Sabouraud glucose (2%) agar at concentrations of 0.1 and 1.0%: gamma benzene hexachloride (lindane), N-ethyl-o-crotonyltoluide, pyrethrins, dieldrin N,N-diethyl-m-toluamide, benzyl benzoate, and--as popular household remedies--Eau de Cologne, neutral soap and garlic.
(10) Survival of ticks treated with pyrethrin, resmethrin, and etophenprox was very low.
(11) Separation was best on an OV-25 column with temperature programming; The chemical ionization mass spectra for the 6 esters as well as for the thermally isomerized pyrethrins I and II are reported and discussed.
(12) The pyrethrins-resistant strain, selected with fenvalerate, quickly became resistant to allethrin, permethrin, phenothrin, and fenvalerate.
(13) The pyrethrins, constituents with insecticidal activity, derived from certain Chrysanthemum species and often suspected as the causative agents, play no role in chrysanthemum allergy.
(14) Laboratory bioassays with Culicoides variipennis larvae from Borax Lake, CA, indicated an LC90 of 16.8 ppb for pyrethrins at 23 degrees C. A field test in a pond adjoining the lake reduced adult C. variipennis emergence greater than 99% for over 30 days after treatment at a rate of 131 ppb pyrethrins.
(15) Cellular effects of pyrethrin and pyrethroid insecticides have been postulated to involve interactions with sodium channels, receptor-ionophore complexes, neurotransmitters, and ATPases.
(16) A recently introduced nonprescription liquid pediculicide, whose major ingredient is 0.3% pyrethrins synergized by 3.0% piperonyl butoxide (RiD), was compared for efficacy and safety with a prescription-only pediculicidal lotion whose major ingredient is 1% gamma-benzene hexachloride (Kwell).
(17) Pyrethrins applied topically before infestation significantly reduced the mean numbers of poultry red mites found in both budgerigar and pigeon trap perches, over those in untreated controls (P = less than 0.01).
(18) Space sprays with Pyrenone (pyrethrins) killed greater than 86% of all insects exposed to the spray path except for the newly colonized flies (1% mortality); mortality of insects protected under straw was low (less than 12%) except for S. cameroni (76%).
(19) An open study was conducted to determine how widespread head lice infestations were among preschool and elementary school children in Sacramento County and to see how effective a newly marked ever-the-counter pediculicide containing 0.3% pyrethrins synergized by 3.0% piperonyl butoxide was.
(20) Trap perches were utilised to quantify mite recoveries during efficacy tests of pyrethrin formulations against experimental infestations of Dermanyssus gallinae (De Geer, 1778) in budgerigars and pigeons, and to monitor mite recoveries from untreated canaries.