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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

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

The Good, the Bad and the Ugly: Some southern African reflections on “Post-border management” of Invasive Alien Plants

The  Good,  the  Bad  and  the  Ugly:  Some  southern  African  reflections  on  “Post-border management” of Invasive Alien Plants
Ian A.W. Macdonald
International Environmental Consultant

Effective management of invasive alien plants (IAPs) once they have entered a defined area hinges on knowing (i) where the species is, (ii) how abundant it is, (iii) how it is being dispersed, (iv) how it can be controlled, (v) how much would it cost to control it, and (vi) how much funding is available to control it. A key approach to effective management is “Early Detection followed by Rapid Response” (EDRR): this works by minimising the extent of the invasion when management is initiated, hence helping to ensure that the cost of control is still within the available funding limits. At this stage, eradication of the IAP within the defined area is the preferred goal.

A successful EDRR programme hinges on correctly prioritizing the emerging IAPs into three categories: (The Good, The Bad and The Ugly). This allows a modified “triage” process to be followed such that available resources are optimally deployed in meeting the invariably insurmountable challenge faced in managing all IAPs present. Once an IAP has been selected for post-border management, a detailed strategy has to be developed with regard to (i) setting a feasible goal, (ii) zonation of the area to be managed, (iii) developing the awareness required to fund and implement the strategy, and (iv) ensuring the full suite of management approaches are being deployed. Unless rapid eradication is the goal, biological control should be employed wherever possible. The deciding factor in the success of any programme is invariably the motivation levels of those involved.

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General News Updates

2019 National Symposium on Biological Invasio…


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


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


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?


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


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


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