Fig. 1. The percentage of living leaves infected with the fungal pathogen Passalora ageratinae per Ageratina adenophora stem, when either galled or ungalled by the fly
Procecidochares utilis, from June 2007 to November 2007. For each month, means followed by the same letter are not significantly different, at P < 0.05 (LSD). (Means ± SE).