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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

A new biological control for Pereskia aculeata

Iain Peterson- Department of Zoology and Entomology, Rhodes University

Barbados gooseberry (Pereskia aculeata) is a problematic invasive in South Africa.

The plant out competes native vegetation and leads to a reduction in native plant biodiversity.

Many protected areas including national parks and world heritage sites are threatened by Pereskia aculeata infestations resulting in a large amount of resources being used to try control the weed.

Mechanical and chemical control is ineffective, expensive and unsustainable because of the plants ability to grow from small cutting and because herbicides are not translocated within the plant tissue.

One biological control agent Phenrica guerini Bechyne (Chrysomelidae) has been released on Pereskia aculeata and although the insect has established at many sites around the country, the damage inflicted by the insect appears to be minimal.

New biological control agents are required to reduce the density of Pereskia aculeata to appropriate levels.

A new potential biocontrol agent for Pereskia aculeate, Catorhintha schaffneri (Correidae) was subjected to host specificity testing.

Catorhintha schaffneri is safe for release in South Africa. An application for release will be submitted pending the results of an impact study to ensure that the agent is destructive enough to warrant the release.

For more information please see the fact sheets below:

Barbados gooseberry (Pereskia aculeata)

 

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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