so say i've got some high dollar clients with several Alberta and blue spruce trees all showing severe damage due to spruce spider mite.....
Your cours of treatment is cayenne and compost tea? Are you serious?
I'm all for the go green/use less pesticides approach but these kind of clients want and need quick, effective results.

I do use abamectin ie...Avid. and have rotated use of this Hexygon, and another miticide....I've been told by several people it's good to change it up to avoid pest resistance as well as each product works differently targeting different maturity levels.