Spider mites suck -- here's some info I recently found re floramite:
FloraMite is in the least toxic group of pesticides which also have the signal word
CAUTION on the label, but is listed as toxic and classified as Category IV pesticides. These pesticides require amounts greater than a pint for a liquid or greater than 350 grams for a solid to cause death in a 150 lb man. Pesticides in this group include: Benomyl, Copper Sulfate solutions, Diatomaceous Earth, Sulfur WP, Neem Oil and Safer Soap.
Floramite is classified right along side Neem oil , Safer Soap & diatmaceous earth etc and none of these (even neem oil) should be considered
nontoxic. That means that even though any pesticide has only a small likelihood of being harmful, caution should always be used when handling these chemicals, particularly in concentrated form.
Avid is in the category III rating which one should use with caution . When u get into category I & II these are the ones that must be used with extreme care but would rarely ever be used on MJ .