Skip to Content

Invasive alien: Water hyacinth

Find, identify and discuss the plants of all the SANParks

Moderator: lion queen

User avatar
Freda
Distinguished Virtual Ranger
Distinguished Virtual Ranger
Posts: 2005
Joined: Sun Dec 05, 2004 7:01 am
Location: Marloth Park, South Africa
Contact:

Unread postby Freda » Sun Mar 30, 2008 3:13 pm

I think it was water lettuce not hyacinth and it is under control at the moment thanks to a little weevil brought here from OZ.
I did an alien plants course in Kruger run by HR's and it was very interesting. They took us to Skukuza to see how they treat all the alien species with different things in portable swimming pools. They were also cultivating the cochineal beetle to use on prickly pears in the park.
Perhaps you will find more information under Scientific Services.

tonil
Posts: 1
Joined: Wed Mar 26, 2008 9:37 pm

Unread postby tonil » Sun Mar 30, 2008 4:22 pm

sunset dam was cleared quite a long time ago. Last week i saw Orpen dam is completely covered with the same watter lettuce/hyacinth. There is a sign up syaing they are testing out some alien plants they plan on using to remove the watter lettuce but just need to make sure they will not kill off anything else.

User avatar
BunnyHugger
Posts: 1289
Joined: Wed Dec 05, 2007 2:16 pm
Location: Hopping around greener pastures.

Unread postby BunnyHugger » Sun Mar 30, 2008 6:59 pm

Thanks Tonil and Freda.

I heardvabout this thing with the weavils when it was still being considerd.

As I understand it the ones that stayed in Oz becam known as the "lesser of the two weavils". :lol:
Bunny Hugger

Conservation is not an option.
It's imperative.

Leave KNP alone. Go build a hotel someplace else. Reserves are for the preservation of wildlife.

Think Pink. ..

User avatar
restio
Senior Virtual Ranger
Senior Virtual Ranger
Posts: 2780
Joined: Sat Jul 15, 2006 8:40 pm
Location: At work

Unread postby restio » Mon Mar 31, 2008 11:20 pm

BH, you might be interested in the water hyacinth topic in the Plants Forum.

User avatar
christo
Virtual Ranger
Virtual Ranger
Posts: 653
Joined: Sat Nov 26, 2005 3:28 pm
Location: Bloemfontein, RSA

Unread postby christo » Tue Apr 01, 2008 5:49 am

I was at sunset dam last week, still cleared, so whatever they did worked.
To change ones life start immideately. Do it flamboyantly. No exceptions.

User avatar
BunnyHugger
Posts: 1289
Joined: Wed Dec 05, 2007 2:16 pm
Location: Hopping around greener pastures.

Unread postby BunnyHugger » Tue Apr 01, 2008 8:43 am

Thanks Restio, Christo.

The article was a bit above the level at which I was interested, but I ploughed on gamely.

A question arises though on the weevil and the control of it once it has "done it's work". There was some concern expressed anout it detroying other flora (vegitation) in the park or areas where it may have been used. This is a concern of mine as well and I don't see any comments on that aspect.

BTW, does anyone know how the whole hyacinth invasion began in SA. I was at Hartebeespoort dam a couple of years ago and the smell of the place put me off to the extent that I will never go back there again. (Not parks related but related to this specific problem).

(Mods, please feel free to move this topic or merge it with the thread dealing with Hyacinth if deemed appropriate.)

I am glad though that Sunset dam has been cleared. It is such a cool spot for a sundowner just before the gates close. I have also enjoyed being there just to watch the aerobatics of the bee eaters. I found them fascinating to watch.
Bunny Hugger

Conservation is not an option.
It's imperative.

Leave KNP alone. Go build a hotel someplace else. Reserves are for the preservation of wildlife.

Think Pink. ..

User avatar
DuQues
Honorary Virtual Ranger
Honorary Virtual Ranger
Posts: 17941
Joined: Fri Jan 14, 2005 5:42 pm
Location: Red sand, why do I keep thinking of red sand?

Unread postby DuQues » Tue Apr 01, 2008 9:16 am

BunnyHugger wrote:(Mods, please feel free to move this topic or merge it with the thread dealing with Hyacinth if deemed appropriate.)

Thanks, just did. :lol:

I saw some of it near Anna Ledeboers grave 2 years ago, but there were signs that Working for Water (old name, forgot the new one) was working there as well. I'll dig up the photos.
Arriving currently: The photos from our trip! Overhere! :yaya:

Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c

User avatar
DinkyBird
Moderator
Moderator
Posts: 45755
Joined: Thu Dec 30, 2004 5:54 pm
Location: Somerset West, Cape Town

Unread postby DinkyBird » Wed Apr 02, 2008 2:55 pm

Further reading on the topic: Water Lettuce.
Sawubona
Dalene


Return to “Plants”