[OGD] invasive Disa (Australia)

"Despite high hopes for containing and eliminating the South African 
monadenia orchid, Disa bracteata, to the area where it was first discovered 
on Kangaroo Island [KI], four populations have been found spread across 
almost 20km.

The original population of this dangerous[???] invasive weed... is still 
present and outbreaks have been found...

The orchid is flowering at present and is easily recognisable.
Authorised officers are currently removing plants at all locations.
.. report them
... remove the plants by digging them out.
Each plant has two bulbs and both must be removed for control.

Monadenia is tolerant of a range of soil types and prefers sites where 
there is soil disturbance.
It is a successful weed because it produces millions of dust-like seeds 
that are readily spread by wind, water, soil movement and machinery.
Car movements can also spread the seed, which remains viable for up to 
seven years.

Monadenia orchids establish high density populations quickly, and can 
out-compete and exclude native flora such as orchids and grasses.
The population on KI is still relatively small and could be controlled if a 
strong effort is made by everyone now."

URL : 
http://www.theislanderonline.com.au/news/local/news/general/dangerous-orchid-still-at-large/1663072.aspx

******************
Regards,

VB

Other related posts:

  • » [OGD] invasive Disa (Australia) - viateur . boutot