The soybean aphid is also an example of an invasive exotic species which has a serious economic impact. In addition, soybean aphids winter on Eurasian buckthorn, one of the top problem invasive exotic plant species in Iowa. Our national policies and regulations for keeping out potential and known invasive exotics are very inadequate, and so is enforcement. We can't keep them all out, but we could be doing a better job than we are now. ch Cindy Hildebrand [log in to unmask] Ames, IA 50010 "I would like to know grasses and sedges... Then my least journey into the world would be a field trip, a series of happy recognitions." (Annie Dillard) **************Big savings on Dell’s most popular laptops. Now starting at $449! (http://pr.atwola.com/promoclk/100126575x1221827510x1201399090/aol?redir=http:%2F%2Fad.doubleclick.net%2Fclk%3B214663377%3B36502382%3Bh) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - To unsubscribe from the IOWA-TOPICS list, send any message to: [log in to unmask] Check out our Listserv Lists support site for more information: http://www.sierraclub.org/lists/faq.asp Sign up to receive Sierra Club Insider, the flagship e-newsletter. Sent out twice a month, it features the Club's latest news and activities. Subscribe and view recent editions at http://www.sierraclub.org/insider/