Taxonomy
- Polyphaga
- Chrysomeloidea
- Chrysomelidae
- Psylliodes
- Psylliodes napi
Images
Source: Roger Key
Description
Size: 2.5-3.3mm
Basic colour: dark blue, sometimes greenish, rarely bronze to brassy.
Pattern colour: None
Number of spots: None
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: Yellow-orange, hind femora darkened
Confusion species: Psylliodes laticollis
Basic colour: dark blue, sometimes greenish, rarely bronze to brassy.
Pattern colour: None
Number of spots: None
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: Yellow-orange, hind femora darkened
Confusion species: Psylliodes laticollis
Palaearctic; introduced into North America but probably not established.
Biology
Status: Common and widespread
Habitat: Various
Host plant: Various Brassicaceae
Overwintering: As adults in moss and grass tussocks
Food: Adults on leaves, larvae are leaf- and stem-miners
Other notes: Adults parasitised by the beaconid wasp Perilitus brevicollis. See the similar P. laticollis for comparison.
Habitat: Various
Host plant: Various Brassicaceae
Overwintering: As adults in moss and grass tussocks
Food: Adults on leaves, larvae are leaf- and stem-miners
Other notes: Adults parasitised by the beaconid wasp Perilitus brevicollis. See the similar P. laticollis for comparison.