6—A COMPARISON OF NEW SYNTHETIC PYRETHROIDS FOR THE INDUSTRIAL INSECTPROOFING OF WOOL

Abstract
An investigation is reported in which five new synthetic pyrethroids were evaluated in the laboratory for their effectiveness as durable insectproofing agents for wool. Their dyebath-exhaustion behaviour was examined under four sets of conditions. The fastness of the treatments to washing, dry-cleaning, and light was assessed by chemical analysis and assay against insects. Four of the compounds studied, WL–43479 (permethrin 40:60 cis:trans), NRDC–143 (permethrin 25:75 cis:trans), S–3206 (fenpropanate), and S–5602 (fenvalerate), showed sufficient promise to warrant further investigation of their use as industrial insectproofing agents.