On Long Island we were threatened with a gypsy moth infestation and many
neighbors were spraying their trees. We contacted a local sprayer, and he said
yes, he did use BT. However we then found out the trucks and equipment are the
same as using BT or when using pesticides, and some use pesticides with BT
added to it. I would investigate thouroughly before letting anyone near your
beeyard, if your trees are not too tall you could probably do it yourself
using a hand held sprayer. Good luck. Conni Still, Bayport, Long Island NY 4
hives, 18 years