today's Pick
Alien water weed invades Lake Kyoga
Publish Date: Mar 27, 2014
Alien water weed invades Lake Kyoga
A close-up of the new water weed called the Giant Salvinia Molesta. PHOTO/John Eremu
  • mail
  • img

By John Eremu
A new water weed, described by Uganda fisheries officials as worse than the water hyacinth, has covered expansive areas of lakes Kyoga and Bisinia.
The weed referred to by locals as Nankabirwa, due to the absence of a native name, has been identified by conservationists as the Giant Salvinia Molesta.

It is ranked by the International Conservation Union (IUCN) among the worst 100 invasive weeds in the world.

The importation of Salvinia has been outlawed in many developed countries because of its devastating ecological and economic effect.

The weed was added to the European and Mediterranean Plant Protection Organization (EPPO) Alert List in 2007 and transferred to the List of Invasive Alien Plants in 2012 (EPPO 2012), according to IUCN.

Research indicates that this aquatic fern, thrives in slow-moving, nutrientrich, warm, freshwater.

It grows very rapidly, out-competing most aquatic plants and is dispersed long distances within water bodies via water currents and between water bodies through animals and contaminated equipment, boats or vehicles.
[Read more on this weed in Thursday's (today) New Vision newspaper on Page 18 of]

The weed as seen on Lake Kyoga about a year ago

The salvinia on Lake Kyoga about four months ago

The impact of salvinia on Lake Kyoga today

The statements, comments, or opinions expressed through the use of New Vision Online are those of their respective authors, who are solely responsible for them, and do not necessarily represent the views held by the staff and management of New Vision Online.

New Vision Online reserves the right to moderate, publish or delete a post without warning or consultation with the author.Find out why we moderate comments. For any questions please contact

  • mail
  • img
blog comments powered by Disqus
Also In This Section
As it happened: Day 2 of Pope in Uganda
Relive a fully packed day when visiting Pope Francis wraps up a tight schedule in Uganda....
Pope Francis meets Ugandan youth
Pope Francis met with young people at Kololo in Kampala on Saturday and he asked them to always pray to God....
LIVE: Day 2 of Pope Francis in Uganda
Live text commentary and pictures of Pope Francis'' second day in Uganda....
Pope hails Africa as
Pope Francis hailed Africa as "a continent of hope" on Friday as he toured Uganda on the second leg of a landmark trip....
As it happened: Pope Francis in Uganda
Relive the build-up to Pope Francis'' coming to Uganda, plus the moments when he finally set foot on Ugandan soil....
Pope Francis
Pope Francis landed in Uganda Friday on the second leg of a landmark trip to Africa, with huge crowds, choirs and dancers celebrating as he touched down....
Is Uganda ready for the pope's visit?
Can't Say
follow us
subscribe to our news letter