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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

Plant attributes contribute to the invasive Tecoma stans L. (Bignoniaceae) in South Africa

Plant attributes contribute to the invasive Tecoma stans L. (Bignoniaceae) in South Africa
Lulama G. Madire
Plant Protection Research, Agricultural Research Council, Private Bag X134, Queenswood, Pretoria, 0121

Tecoma stans L. ex Kunth (Bignoniaceae) was introduced into the country as an ornamental plant and was used as a garden plant because of its yellow bell-shaped flowers and showy leaves. The absence of its natural enemies caused the plant to escape its original cause and end up invading roadsides, open and disturbed land, riparian zones and rocky sides. Tecoma stans produces thousands of papery winged seeds that are easily dispersed by wind and flood water. Seeds have contributed to the invasive behaviour of this plant as they are highly viable according to the germination trials that were conducted in the shade house under normal conditions and also according to field observations. The deep tap root also contributes to the invasive behaviour of this plant. When the plant is chopped or burned, it resprouts into multi-stems in the field. Several environmental factors also contribute to the invasiveness of this plant. This plant continues to extend its range because of its aggressive behaviour. The suitable biological control agents have been recently introduced in the field to control this plant, but it is still too early to determine their establishment and impact.

Read 2969 times Last modified on Tuesday, 03 May 2016 12:31

General News Updates

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