Listronotus oregonensis
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Author(s): Jennifer C. Giron Duque, University of Puerto Rico
Source: IPM Images
Listronotus oregonensis (Le Conte, 1876) - (carrot weevil)
This weevil is an important pest of carrots in central and north-eastern North America. It also attacks celery and parsley. While the adult weevils feed on the leaves, they cause little damage. The main damage is caused by the larvae feeding inside the roots. Yield losses can exceed 50% and young plants may be killed as a result of the damage.
Female weevils, insert their eggs in the petiole of the host plant and the emerging larvae bore into the petiole and move downwards to the roots. After completing their development, the mature larvae leave the roots and pupate in the soil, in a pupation chamber. There are one to four generations per year, depending on the environmental conditions. The adults of the last generation overwinter. The adult weevil is around 6.0 mm long.
| Vernacular names | |
|---|---|
| • English: | carrot weevil |
| • Français: | charançon de la carotte |
Synonyms:
Listronotus rudipennis
For a review see Justus & Long (2019).
- Other images of Listronotus oregonensis (IPM Images and BugGuide - click to enlarge)
larvae feeding on carrot roots
damage in celery
