Spider Mites: works like a charm, I have even been able to kill nymphs in my intestines with a large enough dose of ginger tea. I use about a thumb size per 8 oz cup, make 4 cups at a time. Sweeten it with very little Stevia... I don't need sugar or honey or anything that will make me crave more sugar.
I have also bought powdered organic ginger, just in case there is an emergency, or I don't have time to grind the fresh ginger for the tea. Works just as well, but the fresh tastes better.