I'm using the mosses and wild ferns I've gathered in a terrarium and dish garden for show. I really don't want to share any nasty critters, like thrips or mites, with other exhibiters at the show, and I'd like to also use the extra moss with my African violets and other gesneriads. Can I use Marathan and/or Avid without harming the moss and ferns? Any assistance is again appreciated.

Betty Ferguson