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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 potential of a pre-introductory survey on Arundo donax (L.) to guide a biological control program in South Africa

The potential of a pre-introductory survey on Arundo donax (L.) to guide a biological control program in South Africa
Kim CANAVAN, Iain D. Paterson, Martin P. Hill
Biological Control Research Group, Department of Zoology & Entomology, Rhodes University, Grahamstown 6140, South Africa

A pre-introductory survey is a method used to assess an invasive alien plant in its adventive range in order to gain information on the status of the species prior to the establishment of a biological control program. This study investigated the invasive alien reed Arundo donax (L.) in South Africa prior to the release of biological control agents. The genetic structure of A. donax populations in South Africa, as well as the herbivores associated with the plant, were investigated. Genetic structure was investigated by sequencing three regions of the chloroplast and combining this information with four microsatellite regions. From this it was determined that all populations of A. donax in South Africa are haplotype M1; the most widely distributed haplotype worldwide believed to originate from the Arabian Peninsula. In addition, no genetic diversity was found, indicating that reed stands in South Africa are essential one clone. The diversity of herbivores associated with this haplotype were then recorded. Seven herbivores were recorded feeding on A. donax with two of these species having been introduced from the host plant’s native distribution. A potential biological control agent, the monophagous gall-forming Tetramesa romana Walker (Hymenoptera: Eurytomidae), was found to already be established at all sites investigated in this study. Overall the study was able to determine the region of origin of South African A. donax and record all known herbivores already established in the adventive range. This information will play an important role in guiding the future biological control programme.

Read 2823 times Last modified on Tuesday, 03 May 2016 12:21

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