Ed, Jenny,Barry Cornell was doing some testing a few years ago in search of the native Phragmite. I don't know if it is still going on. I think when some of the aggressive non native plants are introduced, and they have a cousin of the same genus, they hybridize to the point that there are very few of either pure stock left. Bittersweet, mulberry, and Phragmite would be examples.
Barry multiflora rose is asian and there are native and non native bittersweets. After fighting invasives for seven years, I have concluded that it is a waste of resources attempting to erradicate these species. I have weed wrenched, pulled dabbed with chemical, and sprayed. They always come back. Some never die all the way (Japanese knotweed) Others have such an extensive seed bed that you have to keep at it for several years. Some plants have been introduced since the early 1700's so I don't think we will exterminate them any time soon. Scott --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected] -~----------~----~----~----~------~----~------~--~---
