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Reduction Chemistry of Natural Pyrethrins and Preliminary Insecticidal Activity of Reduced Pyrethrins [PDF]
Australian Journal of Chemistry, 2021 The natural extract pyrethrum is an insecticidal oil derived from Tanacetum cinerariifolium that is commonly used in domestic and agricultural pesticides. The major constituents of the extract are the Pyrethrins, six esters that provide pyrethrum with its insecticidal properties.
Martin R. Johnston +5 more
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Chromatographic separation of the pyrethrins
Journal of the Science of Food and Agriculture, 1952 Abstract‘Pyrethrins’ I and II have been separated on both alumina and silica columns. On alumina columns there is some evidence of the separation of the cinerins from the pyrethrins.Material separated in this way has been used to elucidate separations obtained by chromatography of pyrethrum extracts on paper impregnated with alumina and by paper ...
Lord, K. A. +3 more
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Endogenous synthesis of pyrethrins by cannabis [PDF]
, 2017 AbstractPyrethrins are a class of natural terpenoid pesticides produced byTanacetum cinerariifolium, commonly known as chrysanthemum. Here we present evidence that cannabis may be able to produce pyrethrins endogenously. Flower from a cannabis plant grown in a closed hydroponic environment contained 2.48 parts per million pyrethrin I by weight.
Devitt-Lee, Adrian +5 more
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Comparison of pyrethrins extraction methods efficiencies
African Journal of Biotechnology, 2010 (Chrysanthemum cinerariaefolium /Trevir/Vis) was tested using different techniques and solvents. The research included six treatments which are the combination of two techniques (soxtec and ultrasound) and three different solvents (hexane, ethanol and petroleum ether). Dalmatian pyrethrum is a perennial herb native to Croatia.
Ban, Dean +6 more
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TESTS OF SYNERGISM BETWEEN NICOTINE AND THE PYRETHRINS
Annals of Applied Biology, 1953 Synergism between nicotine and pyrethrum applied by injection to adult Oncopeltus fasciatus Dal. has been reported by Turner (1951).When these insecticides were applied alone and as a mixture to adult Tribolium castaneum Hbst., using a dipping technique, the data indicated that independent joint action occurred.
Turner, N., Bliss, C. I.
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Analytical Methods for Determination of Pyrethrins
Journal of AOAC INTERNATIONAL, 1963 Abstract A modification of the present AOAC method for the determination of Pyrethrin II is presented. The proposed modification involves the elimination of water-insoluble acidic materials which, in the present method, titrate as chrysanthemum dicarboxylic acid.
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A Colour Reaction Applicable to the Pyrethrins
Nature, 1950 HESTRIN1 has described the analytical application of a reaction between carboxylic acid derivatives and hydroxylamine. The reaction product gives a coloured complex with ferric chloride in acid solution. This reaction takes place with the pyrethrins and their synthetic analogues, and coloured complexes are formed with ferric chloride.
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A new Colorimetric Method for Pyrethrins [PDF]
Journal of AOAC INTERNATIONAL, 1956 W E Dale, H L Williams, J P Sweeney
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Analytical Methods for Determining Pyrethrins [PDF]
Journal of AOAC INTERNATIONAL, 1960 openaire +1 more source