Different Bt strains are specific to what species they effect, Bt aizawai is the only one listed as toxic to bees so I would stay away from it...but even so they have to ingest it so for this type of application its prity low risk. You definitely do have to know the risks of any control chemical or natural. I agree there is never anything with no side effects at all (just try to reduce the risks as much as possible). I hadn't heard of Bt used for these guys but will definitely look into this.
Jane Bt= Bacillus thuringiensis A bactera that when ingested by many insects produces a protein in that insects stomach that is toxic and thus kills the insect. Usually used for lepidoptera caterpillar control (often Gypsy Moth) or mosquito larva control (with a different subspecies ; Bti)
Thanks for the suggestions!
Wire into the hole is a great idea too! Was wondering how to get the buggers in there without destroying the whole rhizome.
