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German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

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Environmental Programmes

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Distribution, ecology and management of Rubber vine

Ludi Kern - Invasive Species Programme, SANBI

Rubber vine (Cryptostegia grandflora) and Madagascar rubber vine (Cryptostegia madagascarensis) originates from Madagascar where they are restricted to drier areas that receive 350-800mm rainfall annually.

Both species are serious invaders in climatically suitable countries across the world, including Australia where C. grandiflora is listed as a Weed of National Significance.

In South Africa both Cryptostegia species are proposed for listing under NEMBA as category 1b species.
Some occurrence records exit for these species in urban and natural areas in Southern Africa and one of this species is (C grandiflora) is well established and invasive along the Mogalakwena River in Limpopo Province.

As a result, there is concern that C. grandiflora and C. madagascarensis could potentially pose a risk to sensitive unique riparian areas in South Africa.

Few occurrence data exist for these species in Southern Africa making it difficult to determine the species’ current distributions.

Pilot surveys conducted along the Mogalakwena River in the Limpopo province have shown that some areas have densities as high as 2000 plants, although these infestations occur no further than 40m away from the Mogalakwena River.

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Media

General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training

22-01-2019

During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group

04-09-2018

Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?

01-03-2018

On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released

28-02-2018

Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised

25-01-2018

The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more