Sray BT in the tent. It will only kill Caterpillers and is safe. You can
get it in liquid or powder.

Mel & Donnie down in Bluebird Valley In the middle of beautiful down
town Yountsville. Managers of the water works.
http://community.webtv.net/MelDKelly/doc

http://community.webtv.net/MelDKelly/MelDonniesBluebird