Hydrellia (genus - weed bioagents)

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Hydrellia sp. (click to enlarge)
Author(s): BIO Photography Group, Biodiversity Institute of Ontario
Source: BOLD System

Hydrellia Robineau-Desvoidy, 1830

This genus of shore flies is widely distributed and contains more than 200 species. They are stem and leaf miners of plants growing in swamps and marshes, including aquatic weeds. Several are important biocontrol agents like Hydrellia pakistanae which has been successfully introduced into North America against Hydrilla verticillata.

Eggs are laid on the leaves and the larvae mine in the leaves, going through 3 instars, before pupating. The pupae live in an elongated puparium attached to a leaf axil and filled with air. It is initially green and resembles a leaf bud. The emerging adult floats to the surface. It is about 1½ to 2 mm long. The life cycle is completed in about 1 month.

For species of crop pests in this genus see Hydrellia (crop pests).


Currently, the following species have been entered into the system: