Freezing will kill wax moths, all stages (eggs, larvae, pupae and adults). The question of how long to freeze depends on how cold is your freezer. From _Honey_Bee_Pests,_Predators,_and_Diseases_ (Morse and Nowogrodzki): "... minimum treatments are required to kill all stages of the greater wax moth: -7 dC (20 dF) for 4.5 hours, -12 dC (10 dF) for 3 hours, or -15 dC (5 dF) for 2 hours ... (Bulky materials - containers of bee-collected pollen, combs containing honey, and so on - may require considerably longer exposure times to reach killing temperatures.)" Regarding the strain of BT, it is correct that there are many different strains of BT and you must use the strain that specifically targets the pest in question. BT for Colorado Potato Beetle is not the same as BT for asparagus or BT for cabbage. I was surprised that ..._Pests,_ Predators,_and_Diseases_ did not list a specific strain of BT. It is my understanding (which may be flawed, we all know that by now) that the product Certan (which contains the proper strain of BT to kill wax moth larvae) is no longer offered in the states. I do not know the reason why Certan is no longer marketed, perhaps Andy can provide the reason. Aaron Morris - thinking there are times when you can't beat a good book!