In the search for tools to fight the Purple Loosestrife (Lythrum salicaria), naturalists began importing galerucella beetles from Europe. Scientists have found that Galerucella beetles eat only Purple Loosestrife, and the animal was approved as a control organism in the United States since the 1990s.
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Beth Suedmeyer from the Massachusetts Wetland Restoration Program unpacks 7,500 Galerucella beetles as part of the Purple Loosestrife Biocontrol Project. Photo: flickr/urtica