I’m pleased that I may have found the cause of the problems I’ve been having with my eggplants. I found three of these ugly bugs on the stems of the wilting plants on the right side of the picture. I submitted a photograph to BugGuide http://bugguide.net and it was identified as a treehopper nymph http://bugguide.net/node/view/64307/bgimage though it seems to be unusual for them to do serious damage to plants. These are definitely girdling the stems of my plants. They are big enough and few enough for me to just squish them – now that I know what to look for. I think they are the cause of the plants wilting, leaves curling, small spots on leaves and aphids on the plants. I squished and sprayed with Sevin. Until now, the eggplants have been looking pretty good.