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

Robinia pseudoacacia (Black locust) the problem and available solutions

Grant Martin - Rhodes University

Robinia pseudoacacia is a deciduous tree indigenous to North America that was probably introduced into South Africa via the horticultural industry.

Having already established in all nine provinces, it is regarded as one of our most difficult invaders to control as it suckers profusely and readily produces copious numbers of seed.

Not only is it a prolific water user, capable of invading pristine environments, but it is also poisonous to both humans and animals.

Thorny, dense thickets and difficult to navigate mountain terrain make mechanical and chemical control options inadvisable.

The aim of the study is to investigate possible biological control options for the management of the tree.

Three of these insects have already established on R. pseudoacacia populations in Europe and have proved to be damaging, they include a gracillarriid leaf- mining moth (Phyllonorycter robiniella), a cecidomyiid gall midge (Obolodiplosis robiniae) and the locust borer (Megacyllene robiniae forster.

The Locust borer is only known to attack R. pseudoacacia and its cultivars and appears to be the most damaging and promising agent for biological control.

For more information please see the fact sheet below:

Black locust (Crobinia pseudoacacia)

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Media

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