Excuse me, I don't think you've looked it all the information on this forum. There are plenty of people interested in every aspect of Monarchs, especially milkweeds. Plenty of times I've said, "No milkweed, no Monarchs." I myself have been out rescuing milkweeds. Plus if you signed up for the main list serve, you'd reach more people:http://www.monarchwatch.org/dplex/index.htm
"Dplex-L is the name of our electronic mailing list and discussion group on the Internet. If you have an internet Email account, you can join in!"
Monarch Watch wrote in the 2004 newsletter about the swallow-wort culprit:http://www.monarchwatch.org/update/2004 ... wwort.html
Put "swallow-wort" in the http://www.google.com
search. Many states have literature, too.http://www.google.com/search?aq=f&sourc ... D5CA&start
Here are fact sheets from Conservation and Forest Service:http://www.nps.gov/plants/alien/fact/cylo1.htm
This is the federal government for Black Swallow-wort (Cynanchum louiseae).
Under Ecological threat:
" Investigations into impacts on the monarch butterfly, which requires milkweeds for reproduction, indicate that the butterfly will cue into black swallow-wort and lay eggs, but the larvae do not survive."
There is also a Pale Swallow-wort (Cynanchum rossicum). I do not know if this is toxic to Monarchs.http://www.nps.gov/plants/alien/fact/cyro1.htmhttp://www.na.fs.fed.us/fhp/invasive_pl ... w-wort.pdf
National Forest Service, Black Swallow-wort
“There is also concern that monarch butterflies will oviposit on swallow-wort instead of milkweed; the hatching caterpillars cannot develop on swallow-wort.” Loss of native plant species may reduce biodiversity and delay or redirect succession as well as reduce the value of habitat to wildlife."