Horticultural pest (5)

I believe the answer is:
aphid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">horticultural pest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aphid that I've seen before include "Insect feeding on plant juices" , "Fly" , "Plant louse" , "Greenfly etc" , "Garden pest" .)