black-margined loosestrife beetle
... that the black-margined loosestrife beetle was introduced to North America for biological pest control against the invasive purple loosestrife?
... that the <b id="mwC6M"><a href="./Galerucella_calmariensis" id="mwC6Q" rel="mw:WikiLink" title="Galerucella calmariensis">black-margined loosestrife beetle</a></b> was introduced to North America for <a href="./Biological_pest_control" id="mwC6U" rel="mw:WikiLink" title="Biological pest control">biological pest control</a> against the invasive <a href="./Lythrum_salicaria" id="mwC6Y" rel="mw:WikiLink" title="Lythrum salicaria">purple loosestrife</a>?