All individuals of Profenusa thomsoni are female and reproduction is by parthenogenesis.
The eggs are laid inside mature leaves of the host tree, usually near the midrib.
The larvae feed on the mesophyll tissue inside the leaf, creating a pale brownish "blotch"-shaped mine.
Some leaves may have multiple larvae developing inside them.
When fully mature, the larvae emerge through the underside of the leaf and fall to the ground, where they make chambers in which to pupate.
They overwinter in these, emerging as adults in July and August the following year.
There is a single generation per year.
All individuals of Profenusa thomsoni are female and reproduction is by parthenogenesis. The eggs are laid inside mature leaves of the host tree, usually near the midrib. The larvae feed on the mesophyll tissue inside the leaf, creating a pale brownish "blotch"-shaped mine. Some leaves may have multiple larvae developing inside them. When fully mature, the larvae emerge through the underside of the leaf and fall to the ground, where they make chambers in which to pupate. They overwinter in these, emerging as adults in July and August the following year. There is a single generation per year.
Profenusa thomsoni