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Stability of contact insecticides. II —protection of the pyrethrins against ultra‐violet photolysis
Author(s) -
Blackith R. E.
Publication year - 1952
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740030507
Subject(s) - pyrethrum , piperonyl butoxide , ultra violet , photodissociation , chemistry , photochemistry , pesticide , toxicology , organic chemistry , materials science , toxicity , biology , agronomy , optoelectronics
Two methods of protecting pyrethrum films against ultra‐violet photolysis have been investigated, depending respectively on the addition to the films of a dye which absorbs ultra‐violet light, and a pyrethrum synergist which was alleged to exert a stabilizing action on the pyrethrins, apart from the synergistic action. One dye was found, benzeneazo‐β‐naphthol, which doubled the length of life of the insecticidal films. The claims made in this respect for the pyrethrum synergist piperonyl butoxide were not confirmed.