Field observations and experiments showed that the attractiveness of Boronia megastigma terminal shoots for Ctenarytaina thysanura (Hemiptera: Psyllidae) oviposition was effected by the quality and quantity of terminal shoots, relative hardness of the terminal shoot combined with a closed or open architecture of the shoot, nitrogenous fertilizer applications and intraspecific competition between psyllids. Heavy feeding either by nymphal or adult psyllids greatly reduces the attractiveness of terminal shoots for oviposition. This deterrence was associated with the production of honeydew resulting in the development of sooty moulds. When all nymphs had developed to adults, a further 21 days was required for the shoots to be restored to their original condition and suitability for oviposition.