Nymphal Behaviour and Lerp Construction in the Mopane PsyllidRetroacizzia mopani(Hemiptera: Psyllidae) Oppong, C. K. ; Addo-Bediako, A. ; Potgieter, M. J. ; Wessels, D. C. J. Abstract Publication: African Invertebrates Pub Date: May 2010 DOI: 10.5733/afin.051.0105 Bibcode: 2010AfrIn..51..201O