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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

Burrowing nematode

Radopholus similis

Common name:

Burrowing nematode

Scientific name:

Radopholus similis

Alternative common names:

Citrus spreading decline nematode, banana race.

Burrowing nematode is a parasite of plants, and it is a pest of many agricultural crops. It is an especially important pest of bananas and citrus, and it can be found on coconut, avocado, coffee, sugarcane, other grasses, and ornamentals. It is a migratory endoparasite of roots, causing lesions that form cankers. Infected plants experience malnutrition.

Additional Info

  • Where does this species come from?

    Australia

    What is its invasive status in South Africa?

    NEMBA category 1b

    Where in South Africa is it a problem?

    Unknown

    How does it spread?

    Nematode dispersion by runoff water.

    Why is it a problem?

    Is one of the most damaging and widespread nematodes attacking bananas, causing toppling or blackhead disease. The nematode causes a disease condition called toppling or blackhead disease in plants. In bananas they weaken the anchor roots and the plants can fall. The roots also fail to supply the plant with water and nutrients, causing reduced growth and development.

    What does it look like?

    Description: Adults and juveniles are vermiform in shape. Adults are sexually dimorphic. The male has a poorly developed stylet, a knob-like head, and a sharp, curved spicule enclosed in a sac. The male is 0.05 to 0.06 cm in length, while the female is about 0.055 to 0.088 cm long. The female has a well-developed stylet. Both male and female have long, tapered tails with rounded or indented ends. Habitat: It completes its life cycle within root tissue. Breeding: Mature males of burrowing nematode are not infective. As the mature females migrate through root tissue, they lay eggs that are produced through either sexual reproduction with males or by hermaphroditism. Once an egg hatches, the emergent second-stage juvenile can migrate within the root and complete its entire life cycle within the root system, or it can leave the roots in search of another healthy host root.

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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