From:Mozambique, Other Region: Other Topic: Invasive Plants Title: Controlling Thermopsis rhombifolia (buffalo bean) in Mozambique Answered by: Nan Hampton and Mark Simmons
Dear Mr. Smarty, Please,can you assist. We have
a plot on a dam in Mozambique. It has been invaded with Thermopsis
rhombifolia (we call it buffalo bean), it is very hardy and if you fall
in it or just touch it, it is very itchy and sore. We would like to try
and destroy a lot, but need to know how we can do it and what we can use,
without destroying any of the water weeds, etc., in case what we use runs
into the dam.
Thermopsis rhombifolia (prairie thermopsis), a native of Canada and and the Great Plains area of the US, is a legume—member of the Family Fabaceae (Pea/bean family). For selective treatment a legume-specific herbicide with the active ingredient clopyralid (e.g. Transline) might be the best bet. Alternatively, if you're up to experimentation, prescribed fire could be tested, although spring fire has been demonstrated to encourage this species on trails in Canada. Using fire at different times of years has been shown to differentially affect species.
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