I did see one or two treatments that had moved it into the Papaipema - according to a book I have Papaipema come in the category of borers that push their frass out of the larval tunnel so that it accumulates beneath the tunnel entrance outside. I guess if it's a microscope job to determine the species, at least if Leslieray can catch a look at the culprit we'll be able to tell if it's a weevil or moth larva...
