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The Global Invasive Species Team | |
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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? --------------------------------------- 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? --------------------------------------- 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://tncweeds.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. --------------------------------------- 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. |
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