Hummingbird and Butterfly Gardening: caterpillar enemy?, 1 by Targator

Targator wrote:
Of the five varieties of passion flowers in the yard, the Gulf Fritillaries seem to show the ‘Lady Margaret’ and the Passiflora caerulea the most attention. However, both of these plants are crawling with what appears to be wasps or hornets. The GFs and Zebras are laying eggs all day on these two plants especially, yet there appears to be little caterpillar activity. This has gone on for a month or two now and I would rather let Mother Nature take care of the balance. Any advice?

My others passion flowers, ‘Alba’, ‘Corky-stemmed’, ‘Lutea’, and 'Lavender Lady' are getting some butterfly passers-by and caterpillars, but not as prevalent as the aforementioned.