Schizomyia viticola
... that although the gall midge Schizomyia viticola can produce up to 135 galls on a single grape vine leaf, the plant is not harmed?
... that although the <a class="mw-redirect" href="./Gall_midge" id="mwAQ8" rel="mw:WikiLink" title="Gall midge">gall midge</a> <i id="mwARA"><b id="mwARE"><a class="mw-redirect" href="./Schizomyia_viticola" id="mwARI" rel="mw:WikiLink" title="Schizomyia viticola">Schizomyia viticola</a></b></i> can produce up to 135 <a href="./Gall" id="mwARM" rel="mw:WikiLink" title="Gall">galls</a> <i id="mwARQ">(pictured)</i> on a single grape vine leaf, the plant is not harmed?