Fenusa pumila
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Fenusa pumila Leach, 1817 - (birch leafminer)
This leaf-mining sawfly is native to temperate parts of Europe. It has been recorded from North America since 1905 (first record from Nova Scotia, Canada). The host plants are mainly species of birch (Betula), but it can occasionally also mine the leaves of alder or hazelnut. Young leaves are preferred. While it causes little damage in Europe, it is regarded as a significant pest of birch trees in North America.
The North American populations consist only of females. There is one generation per year with the development of the larvae in the mines taking around 2 months. The mature larvae (prepupae) then form a hibernaculum in the mine where they overwinter. The adults emerge in spring. Several parasitoids have been introduced from Europe into North America during the 1930s as part of biological control programs (Bartlett et al., 1978).
Synonyms:
Fenusa pusilla
| Vernacular names | |
|---|---|
| • English: | birch leafminer |
| • Español: | minador de abedul |
| • Français: | mineuse du bouleau mineuse petite du bouleau |
