This link

http://extension.missouri.edu/p/g7274

offers several recommendations including any number of the oil based pesticides. Just scroll down to the section on mites. Note the link between them and the plant being heavily stressed by other factors.

You can also use the search to pull up some of the 100+ previous discussions here on 'spider mite control' for even more recommendations.

Dave

I believe that it was Dave that said he used Murphy's oil soap to treat SMs. One Tbsp. per quart. Hit them early before they get out of control.

Thanks Jack. Now I remember that earlier comment.