Passiflora is known as a butterfly host. I recently planted 2 varieties of passiflora. Within a day or two there were 4 new varieties of butteflies along with eggs followed by newly hatched catepillars. At first I treated with a little 5% Sevin dust and considered using a systemic insecticide but one of my Passiflora produces fruit and I needed an alternative solution. I began encouraging birds to visit the area with the introduction of a bird bath, bird feeder and bird house and within days the catepillars vanished.