Horse-nettle, Solanum carolinense, along with earlier posts, has made an annual cycle here. Funny thing is that when I recently came across a large patch, I somehow thought it was a new species find. Actually thought the same thing about yesterday's Burdock too! :-)
For a serendipitous etymological angle, this article from Michael Quinion's weekly e-magazine, World Wide Words, arrived yesterday.
Agriculture and Life, in the following snippets, not only illustrated the usual methods of extermination but also offered advice for more thoughtful control:
horse nettle. Perhaps nothing better can be suggested than alfalfa followed by corn or potatoes, and these in turn followed by oats and peas cut for hay and the ground again seeded to alfalfa. The alfalfa is cut three or four times in a summer."
Cromwell, Arthur D. Agriculture and Life. Philadelphia, London, 1915. 265. Web. Google Book Search. 10 Oct 2009.