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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 candidate biological control agent for the control of Pereskia aculeata Miller (Cactaceae) in South Africa

A  new  candidate  biological  control  agent  for  the  control  of  Pereskia  aculeata  Miller (Cactaceae) in South Africa
Lumka Anita Mdodana, Iain D. Paterson, Steve Compton
Rhodes University

Pereskia aculeata is an invasive alien cactus species in South Africa. Phenrica guerini Bechyne (Chrysomelidae) is the only biological control agent that has been released against P. aculeata but other agents are required to manage this species at acceptable levels. Catorhintha schaffneri Brailovsky & Garcia (Coreidae) is a new potential biological control agent currently under review and if acceptable it will be released later this year. A species of weevil in the tribe Cryptorhynchinae is another promising candidate that was collected from Brazil in 2012. The species is currently being described and will be placed in a new genus (Manuscript name Pereskiophaga sp.). The adults of Pereskiophaga sp. feed on the leaves and shoot tips of P. aculeata and the larvae mine inside the stems  destroying  the  vascular  tissue.  Host  specificity  testing  of  Pereskiophaga  sp.  is  being conducted. Thus far two species of Cactaceae (Pereskia quesquenyana, and Opuntia aurantiaca) have been tested and no non-target oviposition or feeding has been recorded. Test plant species which prove to be suitable for oviposition will be used in further testing to see if development to the adult stage is possible.

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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