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Vesperus xatarti , known as the longicorn , is a species of beetle in the family Vesperidae . These longicorns are found in mainland Spain and the Balearic Islands , and in southern France .
The castañeta measures between 18 and 30 mm , and adults are active year-round except in midsummer; they cause significant damage to olive trees . Females have ovipositors and lay their eggs in groups on wood.
The following methods can be used to combat it:
Monitoring the emergence of adults with traps.
Cultural methods: debarking.
Chemical control: against neonatal larvae, with organophosphates (chlorpyrifos).
Biological control: nematodes .
