Jerry and others: I am not expert in wax moths but can relay that Bt works best on small instars that are eating voraciously. (In tent caterpillars, we recom- mend delaying treatment during cool weather when caterpillars aren't eating much.) Also Bt must be alive. Sometimes storage conditions (en route or on site) aren't the best. (Well, Bt used to have to be alive, but now that I think of it, newer Bts can be only the crystal that the Bt produces.) Anyway, you might check that angle. UGuelph's Entomology list has a discussion going on genetically altered food crops with Bt genes incorporated. Genetically altered bees with their own personal supply of Bt?????? SHARON J. COLLMAN W.S.U. COOPERATIVE EXTENSION URBAN IPM RESOURCE CENTER @ CENTER FOR URBAN HORTICULTURE UNIVERSITY OF WASHINGTON GF-15 SEATTLE, WA 98195 PHONE: 206-543-8616 E-MAIL [log in to unmask]