St John's Wort at Paddys River, ACT
Identification history
| Hypericum perforatum | 13 Nov 2014 | michaelb |
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User's notes
St Johns's Wort is a declared noxious weed in some parts of NSW. A variety of biological controls have been used to reduce the amount and spread of St John's Wort. One is the use of Chrysolina beetles, which are shown in the photographs. Two species of Chrysolina beetles have been established in Australia. The larvae eat the winter growth leaves, and the adults eat the spring growth leaves. Sometimes you see plants that have been completely defoliated. They are effective only in areas of full sunlight. The use of these beetles has only been partly effective and sporadic. Reference http://www.dpi.nsw.gov.au/agriculture/pests-weeds/weeds/profiles/st-johns-wort
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Nearby sightings
Location information
- Coordinates 149.075667-35.450667
- Altitude 123.1m
- Maps Point Hut to Tharwa
- Places Paddys River, ACT
Sighting information
- 1,001 - 10,000 Abundance
- 2 Nov 2014 07:05 PM Recorded on
- michaelb Recorded by
Additional information
- True In flower
Species information
- Hypericum perforatum Scientific name
- St John's Wort Common name
- Not Sensitive
- Exotic
- Noxious or High Risk Weed or Pest
- Up to 1671.7m Recorded at altitude
- Machine learning
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In flower
- External link More information
Record quality
- Images or audio
- More than one media file
- Confirmed by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
