horse chestnut scale insect
... that the horse chestnut scale insect is primarily a pest of urban trees?
... that the <b id="mwBBM"><a href="./Pulvinaria_regalis" id="mwBBQ" rel="mw:WikiLink" title="Pulvinaria regalis">horse chestnut scale insect</a></b> is primarily a <a href="./Pest_(organism)" id="mwBBU" rel="mw:WikiLink" title="Pest (organism)">pest</a> of urban trees?