Fig. 19.1 Photographs taken at paired sites near Makhanda, Eastern Cape, before and after
successful biological control, on hillsides covered with dense infestations of Acacia longifolia
(Long-Leaved Wattle) trees in 1978 (a), subsequently replaced by native vegetation in 2013 (b).
Photographs courtesy of JH Hoffmann
Fig. 19.2 Photographs taken at paired sites on Sunset Dam, Kruger National Park, Mpumalanga,
before (a) and after (b) successful biological control of Pistia stratiotes (Water Lettuce). Photographs courtesy of LC Foxcroft
Fig. 19.3 Photographs taken at paired sites near Upington, Northern Cape, of flourishing
populations of Cylindropuntia fulgida (Boxing-Glove Cactus) in 2012 (a) replaced by dead and
dying stumps in 2015 (b) after biological control. Photographs courtesy of Travor Xivuri
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successful biological control, on hillsides covered with dense infestations of Acacia longifolia
(Long-Leaved Wattle) trees in 1978 (a), subsequently replaced by native vegetation in 2013 (b).
Photographs courtesy of JH Hoffmann
Fig. 19.2 Photographs taken at paired sites on Sunset Dam, Kruger National Park, Mpumalanga,
before (a) and after (b) successful biological control of Pistia stratiotes (Water Lettuce). Photographs courtesy of LC Foxcroft
Fig. 19.3 Photographs taken at paired sites near Upington, Northern Cape, of flourishing
populations of Cylindropuntia fulgida (Boxing-Glove Cactus) in 2012 (a) replaced by dead and
dying stumps in 2015 (b) after biological control. Photographs courtesy of Travor Xivuri
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M. P. Hill et al.