Sorry, double posts..
Just to add that spider mites seemed to love my eggplants so much that I have given up ever growing my own ..
The little terrorists made my lovely plant all yellow in a few days.. and no spraying helped. (that was two years ago)
The same goes for ground cherries and tomatillos, they were a spider mite magnet! But I won't give up on them yet - I will be better prepared. Neudorff's organic spray didn't help...
But there is one spray that I found effective, it is officially meant for indoor houseplants.. still, it is not toxic to humans and other mammals, and it disintegrates quickly.