AVERMECTIN B1a AS A LONG-TERM PROTECTANT OF WOOLEN FABRIC1

Abstract

Woolen cloth treated in emulsion baths at concentrations of 0.001, 0.003 and 0.005% AI in the bath with Avermectin B1a, a natural product derived from the soil actinomycete, Streptomyces avermitilis, was stored for 60 months in a room maintained at 27 ± 1°C and 60 ± 5 RH. After 60 months in storage, feeding tests conducted with the cloth with larvae of the black carpet beetle, Attagenus unicolor (Brahm), the furniture carpet beetle, Anthrenus flavipes LeConte, and the webbing clothes moth, Tineola bisselliella (Hummel), showed that the cloth treated at all bath concentrations was still satisfactorily protected.