This is an interesting story but not a new one. We have discussed it here many times before.

Contaminated Manure story

Here's another link with numerous images of affected plants:

http://whatcom.wsu.edu/ag/aminopyralid/

That page also has a link (at the left) to a simple bio-assay all gardeners can, and should, do if they obtain composted manure from off-site.

Yes, floral, we have discussed this here many times, but it is something that needs repeating and reposting.

kimmq is kimmsr

A copy & paste, repost and repeat pattern makes the forum rather tedious.