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Re: Warning-diatribe was Re: Opinions please

At 7:24 PM -0500 8/21/98, Al. Robert Krismer wrote:

> I think the Clinton Administration earlier through an executive order banned
> the use of non-native plant material in projects funded by federal tax money
> ie landscaping new federal buidings etc. The order was so vague that some
> people interpreted it to mean a ban on any plant species not native to the
> United States, which meant banning lilac, yew, and viburnum species.

If the Federal government were to use only natives it would certainly
provide a big enough market to get some natives established in the
trade. I would very much like to see this. I doubt it would have much
of an effect on the availability of lilac, yes or viburnum.

> I hope any ban is sensible ( I agree that some foreign intruders have been a
> real problem ie some lythrum species). However I had an arguement one time
> with someone who supported the complete ban on lythrum, including such
> varieties as "Mordon's Pink" which for all intents and purposes is sterile. I
> have a clump of "Mordon' Pink for ten years and during that time have only
> noticed one or two volunteers. The person argued that it seeded heavily like
> the other lythrum.

I hope the article at the UCONN site will convince you. The sterile
cultivars are only self-sterile and happily breed with their obnoxious
cousins. Loosestrife is insect pollinated so the pollen can be
transported many miles from one's garden. The research was done by the
University of Minnesota.

Sterile loosestrife cultivar info is at UCONN IPM Loosestrife
http://www.lib.uconn.edu/canr/ces/ipm/general/biocntrl/notprty.htm.

MN Sea Grant: Purple Loosestrife: What You Should Know, What You Can Do
http://www.d.umn.edu/seagr/exotic/purple/purplel.html

Why is Purple Loosestrife an effective invader?
http://www.science.mcmaster.ca/Biology/Harbour/PURPLEL/INVA.HTM

http://www.dnr.state.mn.us/information_and_education/publications/volunteer/arti
cles/loosestrife.html


---
Peggy Enes (peggy@unicom.net)   Zone 5/6


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