Greater St Johns Wort beetle at O'Connor, ACT
Identification history
| Chrysolina quadrigemina | 1 Dec 2020 | MichaelMulvaney | ||
| Unidentified | 1 Dec 2020 | ConBoekel |
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User's notes
The second and third images are of a second individual. There were four individuals on four separate flowering St John's Wort. There seemed to be some damage to the St John's Wort plants. Is an example of biological control? I subsequently checked over a dozen flowering St John's Wort without again seeing any beetles. When disturbed, individuals would let go and fall to the ground.
3 comments
MichaelMulvaney
wrote:
1 Dec 2020
Yes this beetle is a biological control agent - not that effective
roymcd
wrote:
1 Dec 2020
Dr. Mulvaney, how dare you besmirch our little helpers...! :-)
(I guess the key word is 'little')
(I guess the key word is 'little')
AaronClausen
wrote:
1 Dec 2020
I pulled out 4 plants of this today up at Piney Ridge. Will look out for beetles next time.
Location information
- Coordinates 149.106955-35.259310
- Altitude 602.1m
- Maps Dryandra St Woodland
- Places O'Connor, ACT
Sighting information
- 4 Abundance
- 30 Nov 2020 09:41 AM Recorded on
- ConBoekel Recorded by
-
Collections
Insects Leaf beetles (Chrysomelidae) Beetles (Coleoptera) ConBoekel
Additional information
- St John's Wort Associated plant
- 5mm to 12mm Animal size
Species information
- Chrysolina quadrigemina Scientific name
- Greater St Johns Wort beetle Common name
- Not Sensitive
- Exotic
- Non-invasive or negligible
- Up to 1025.94m Recorded at altitude
- Machine learning
- External link More information
Record quality
- Images or audio
- More than one media file
- Verified by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
