Otiorhynchus ligustici
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Author(s): Kent Loeffler, Cornell University
Source: IPM Images
Otiorhynchus ligustici (Linnaeus, 1758) - (alfalfa snout beetle)
The beetle is native to Europe and western Asia and has been introduced into eastern North America with sailing ballast between 1848 and 1896. The adult is flightless and has spread very slowly. Its current distribution is still confined to parts of the State of New York, U.S.A. and to pockets in Ontario, Canada. However, in these areas it is a very important pest of alfalfa.
The larvae bore into the roots of alfalfa, often causing total crop losses. Beets (in the vicinity of alfalfa) and occasionally poppy, red clover, strawberry and grapevine may be also attacked.
During its development, the beetle goes through a 2-year life cycle. The larvae hatch from the eggs and feed during the first year, passing through 7 instars. They then move about 50 cm into the ground where they overwinter. In the following year they continue feeding and pupate with the young adults emerging the following spring. The adult beetle is 10-14 mm long and dark grey to black.
| Vernacular names | |
|---|---|
| • Deutsch: | Luzernerüssler Liebstöckelrüssler |
| • English: | alfalfa snout beetle lovage weevil |
| • Español: | gorgojo del levístico |
| • Français: | charançon de la livèche charançon de la luzerne otiorrhynque de la livèche |
Synonyms:
Cryphiphorus ligustici
Arammichnus ligustici
Brachyrhinus ligustici
For a review see Shields et al., 2009.
