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Toxicological Reviews, 2005
The pyrethrins have a long and fascinating history. They were derived from dried chrysanthemum flower heads that were found to have pesticidal activity centuries ago. They comprise a complex mixture of six main chemicals. Commercial formulations usually contain piperonyl butoxide, which inhibits metabolic degradation of the active ingredients ...
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The pyrethrins have a long and fascinating history. They were derived from dried chrysanthemum flower heads that were found to have pesticidal activity centuries ago. They comprise a complex mixture of six main chemicals. Commercial formulations usually contain piperonyl butoxide, which inhibits metabolic degradation of the active ingredients ...
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Oxidative Metabolism of Pyrethrins in Mammals
Nature, 1971THE natural pyrethrins present in pyrethrum flowers (Chrysanthemum cinerariaefolium) have attracted attention for more than a century because they are powerful insecticides yet have very low toxicity to mammals1,2. Concern about the persistence of some insecticides in mammals and in the environment has stimulated a consideration of the degradability of
J E, Casida +3 more
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Chemistry of the Natural Pyrethrins
1961The flowers of the herbaceous perennial Chrysanthemum cinerariaefolium Vis. (synonym, Pyrethrum cinerariaefolium Trev.), a member of the Compositae family, are valued for their insecticidal properties: the history of their employment has been discussed by Gnadinger (77,78).
L, CROMBIE, M, ELLIOTT
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Pyrethrin and Pyrethroid Insecticides
Veterinary Clinics of North America: Small Animal Practice, 1990Pyrethroids have a wide spectrum of insecticidal potency, vertebrate toxicity, and environmental stability. The exceptionally high selectivity ratios of pyrethrins and pyrethroids have resulted in their use for insect control in numerous formulations.
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Pyrethrins and Pyrethroid Insecticides
2011Pyrethrum is one of the oldest and most widely used botanical insecticides and its insecticidal properties have been known for more than 150 years. The commercial limitations of pyrethrum extracts, which are collectively known as pyrethrins, have long been recognized because of their high rate of photodegradation and a short “knockdown” (rapid ...
Jerome J. Schleier III* +1 more
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Effects of Pyrethrins upon Blowflies
Journal of Economic Entomology, 1941The penetration of contact insecticides through the cuticle of insects and the consequent lethal effect should depend on the characteristics of the cuticle at the time of treatment. Immediately after molting or after emergence of the adult from the pupa the cuticle is softer and thinner than at other times. Therefore one might suppose that insects that
L. D. Anderson, R. A. Hook
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ChemInform Abstract: Chemistry of Pyrethrins
ChemInform, 1995AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Pyrethrins and Allied Compounds
1955Knowledge of the value of pyrethrum flowers as an insecticidal material was kept well hidden by the original discoverers and it was not until the nineteenth century that European populations became aware of the disinfesting value of a material known as „Persian Insect Powder“.
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Heck Arylation of the Natural Pyrethrins
SSRN Electronic Journal, 2022Todd E. Markham +2 more
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