The new name under beekeepers products is Certan wax moth Larvicide. It’s a little pricey even for bee products @ around $35+ for
5 oz. Someone had to pay the registration fees. In the old days there is rumored people have used Xentair, b402, certan b401 all are a targeted pesticide that some of them developed for cabbage worms. Does not harm bees. It is Bacillus thuringiensis.