They aren't so much invasive as a tenacious agricultural pest. In a field they'll keep coming up year after year in the same places. You have to spray them, hard, To get rid of them. I was just relating to the practical impossibility of getting rid of certain things, not trying to say they were a problem in wildlands. In ohio at least, all annual weeds that persist in agricultural fields, get squeezed out by goldenrods and grasses after 3-4 seasons.
On Aug 11, 2009, at 9:46 PM, Barry Caselli wrote: > I guess thistle could be invasive, but fortunately it's an annual. > There's an extremely tall species of Boneset (Eupatorium spp.) that > grows on our property now and is becoming invasive. It's been taking > over my perennial beds at the front of the house. I'm pretty sure I > collected seed from some on a roadside several years ago, but I > never expected them to take over. > > --- On Tue, 8/11/09, Randy Brown <[email protected]> wrote: > > From: Randy Brown <[email protected]> > Subject: [ENTS] Re: Invasive plants and trees > To: [email protected] > Date: Tuesday, August 11, 2009, 6:35 PM > > <<Shrug>> True you don't see these much in the woods. I just > assumed others were familiar with gardening. These are two worst to > get rid of. They both have extensive root systems and are near > impossible to pull it all out. You think you got enough but they > always sprout up again. > > On Aug 10, 2009, at 10:48 PM, Barry Caselli wrote: > >> Fortunately I've never seen dandelion in the wild. It's in our yard >> and other yards and such, but that's all. >> Come to think of it, I don't remember seeing any this year at all, >> at least not in OUR yard. As for garlic mustard, that's something I >> never heard of, except in this group. >> >> --- On Mon, 8/10/09, Randy Brown <[email protected]> wrote: >> >> From: Randy Brown <[email protected]> >> Subject: [ENTS] Re: Invasive plants and trees >> To: [email protected] >> Date: Monday, August 10, 2009, 7:29 PM >> >> >> dandelion and thistle's anyone? >> >> I did have some luck knocking back garlic mustard at a local >> metropark. I pulled it out for three years and has >> almost vanished in certain areas. Not sure I was the only on doing >> it >> though. >> >> On Aug 10, 2009, at 7:54 AM, pabigtrees wrote: >> >> > >> > 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] -~----------~----~----~----~------~----~------~--~---
