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Global Invasive Species Team listserve digest #035
Fri, 2 Jul 1999 17:10:03 -0700 (PDT)
--CONTENTS--
1. Unintended Arsenal damage
2. Knapweed sickness, again
3. Have horses been implicated in the spread of exotics?
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1. Unintended Arsenal damage
From: Bob Merriam (bmerriam(at)tnc.org)
I have been killing trees-of-heaven and privets by cutting them off close
to the ground and applying Arsenal AC to the stumps with a spray bottle
(at concentrations recommended by the manufacturer). Occasionally I find
adjacent trees dying in areas of heavy management, although mostly
adjacent vegetation stays healthy. Does anyone have experience with
Arsenal (imazapyr) who can tell me whether this methods is safe?
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2. Knapweed sickness, again
From: Susan Kearns (KearnS(at)mail01.dnr.state.wi.us)
---Two years ago an email message flew around the world with rumors that
pulling spotted knapweed caused a health hazard. (It is posted on our
website at http://tncinvasives.ucdavis.edu/newsnotes.html) Since then,
Susan Kearns has been contacted by a number of people who claim
knapweed-related syndromes. Hysteria or fact? Read on...---Barry
I got calls from several people who had experienced nausea, headaches,
rashes, bitter taste in the mouth and other ailments after pulling spotted
knapweed barehanded. One person I talked to still felt sick over a week
after pulling it! Several people assumed that "everyone knows" that it
gives people rashes and a bitter taste in their mouth (supposedly the
chemicals from the plant entering the bloodstream and reaching the mouth)!
So there is a lot of anecdotal evidence that there may be a problem.
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3. Have horses been implicated in the spread of exotics?
From: Barry Rice (bamrice(at)ucdavis.edu)
I have been contacted by a non-profit group called EnviroHorse. They are
educating horse owners about environmental issues. They would like to know
if anyone has literature references or experience on horses spreading
exotics. They are interested in measures appropriate in preventing the
spread of exotics through equestrian activity. If you can help, contact
Adda Quinn at aquinn(at)epri.com, 1-800-255-3774x2478 or email me.