yea looks like mites...? anyway confidor? thats imidicloprid right? thats not effective for mites from my experience anyway.
i had mites not to long ago, i used a product called abamectin e pro you might want to read about it.
the stuff is sold in a super concentrated form, 1-2 ml per gallon is plenty. i think i sprayed every other day like 5 times... then waited a week and did the same thing over again. the product is "translaminar" supposedly, so once sprayed onto the tops of the leaves, it will make it down to the bottom of the leaf where the mites live. i followed the directions pretty strictly, distilled water ph'd to 5-6 and i added 5ml of a surfactant... alkylphenol ethoxylate per gallon to get the best coverage.
my plants are close to a giant pine tree, i understand these tend to harbor mites?
http://www.avidgardenpro.com/garden-products/abamectin-e-pro-0-15/