I recently stumbled across something you might want to try. I have had a problem with spider mites and because my enclosures are large and not easy to remove everything, I have had difficulty keeping them off the chucks. I olive oil and it works for a while but the come back. Well I starting mixing in spearmint leaves with the food and to my suprise the mite problem is reduced to a couple here and there. I don't know if it is the mixture I am feeding or what. I feed alfalfa, white clover, dandelion greens, endive and kale. Plus mixed veggies and carrots and tortoise chow occasionally mixed with the veggies. Anyone have similiar experience with diet?