Establishment ofNeltumius arizonensis(Coleoptera: Bruchidae) on Mesquite (ProsopisSpecies: Mimosaceae) in South Africa

Coetzer, W.; Hoffmann, J. H.

doi:10.1006/bcon.1997.0558

Cited by 21 publications

(7 citation statements)

References 6 publications

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“…A combination of mechanical, chemical and biological control methods is used to control Prosopis , mainly by the government-managed Working for Water programme. Three seed-feeding beetles ( A. prosopis , A. bottimeri and Neltumius arizonensis ) were introduced as biological control agents to try and reduce spread while maintaining its benefits (Zimmermann 1991; Coetzer and Hoffmann 1997). Neltumius arizonensis failed to establish (Zachariades et al .…”

Section: Management Of Prosopismentioning

confidence: 99%

Prosopis: a global assessment of the biogeography, benefits, impacts and management of one of the world's worst woody invasive plant taxa

et al. 2014

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Taxa from the genus Prosopis are widespread invasive aliens across the globe. Numerous species have contentious issues surrounding them as they provide both benefits and harm. Prosopis taxa are currently naturalised or invasive in 103 countries and are bioclimatically suitable for many more. There are numerous management practices available to control Prosopis invasions, each with their benefits and costs, however, in most areas management has had only limited success. There is need for more research to improve understanding and management success and for countries to develop strategic plants to guide managed in the future.

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Section: Management Of Prosopismentioning

confidence: 99%

Prosopis: a global assessment of the biogeography, benefits, impacts and management of one of the world's worst woody invasive plant taxa

et al. 2014

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“…Three species of biological control agents (Algarobius prosopis, A. bottimeri and Neltumius arizonensis) were released in South Africa between 1987 and 1992 (Zimmermann, 1991;Coetzer and Hoffmann, 1997), but only A. prosopis has successfully established (Impson et al, 1999;Klein, 2002). A. prosopis causes 90e98% seed destruction in certain areas where livestock are excluded (Zimmermann, 1991).…”

Section: The Use Of Biological Controlmentioning

confidence: 99%

Costs, benefits and management options for an invasive alien tree species: The case of mesquite in the Northern Cape, South Africa

Wise

Wilgen²,

Maitre³

2012

Journal of Arid Environments

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“…Ramanand and T. Olckers (Coetzer & Hoffmann, 1997;Olckers, 2011) and elsewhere in the world (e.g. Delobel & Johnson, 1998;Kingsolver, 2004;Siemens, Johnson, & Woodman, 1991;Van Klinken, 2005).…”

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confidence: 99%

“…Byrne, Witkowski, & Kalibbala, 2011), parasitism (e.g. Byrne et al, 2011;Coetzer & Hoffmann, 1997;Van Klinken, 2005;Van Klinken & Flack, 2008) and abiotic or unknown factors (e.g. Van Klinken & Flack, 2008) has restricted the impact of the biocontrol agents.…”

mentioning

confidence: 99%

“…Egg concealment is a crucial factor for reducing bruchine egg mortality as exemplified by the biocontrol programme against Prosopis species (Fabaceae) in South Africa (reviewed by Zachariades, Hoffmann, & Roberts, 2011). In this instance, Algarobius prosopis (Le Conte) reaches considerably higher population densities than Neltumius arizonensis (Schaeffer), largely because of lower egg parasitism since the eggs of A. prosopis are concealed in cracks and crevices on the pods while those of N. arizonensis are fully exposed on the pods (Coetzer & Hoffmann, 1997;Zachariades et al, 2011). The vulnerability of A. macrophthalmus eggs is supported by observations (S. Neser, personal communication, 15 September 2010) that, in attempts to conceal their eggs, the adult females often use old adult exit holes, and even the tiny larval entry holes, to oviposit on the insides of the pod surfaces of L. leucocephala.…”

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confidence: 99%

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Does height of exposure in the canopy influence egg mortality inAcanthoscelides macrophthalmus(Coleoptera: Chrysomelidae), a biological control agent ofLeucaena leucocephalain South Africa?

Ramanand

Olckers

2013

Biocontrol Science and Technology

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Introduced into several countries worldwide for agroforestry, Leucaena leucocephala (Lam.) de Wit is a typical 'conflict species' that invades several riparian, forested and disturbed habitats in South Africa. The seed beetle Acanthoscelides macrophthalmus (Schaeffer) (Chrysomelidae: Bruchinae) was subsequently deployed as a seed-reducing agent to offset its excessive seed output. However, exploratory egg-exposure trials, in which native Acacia s.l. trees were used as 'surrogate host plants', suggested that high egg mortality is reducing the beetle's impact. The aims of this study were to (1) verify this suspicion by comparing the mortality of eggs exposed in L. leucocephala and Acacia nilotica (L.) Willd ex Del. stands and (2) determine whether height of exposure in the canopy (i.e. oviposition site selection) influences the different mortality factors. Although lower than in the exploratory trials, egg mortality was considerable, ranging from 30 to 50% in most instances. While unaffected by height of exposure, the overall egg mortality (i.e. all factors) was significantly lower in seeds exposed on L. leucocephala. Mortality was not only mostly attributed to parasitism (51% of mortality), but also predation (30%) and unknown factors (19%). While unexplained mortality and predation were not influenced by tree species or height of exposure, parasitism increased significantly with height above ground and was significantly lower in seeds exposed on L. leucocephala. Egg mortality is thus one of several factors that appears to be limiting the efficacy of A. macrophthalmus in South Africa.

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Establishment ofNeltumius arizonensis(Coleoptera: Bruchidae) on Mesquite (ProsopisSpecies: Mimosaceae) in South Africa

Cited by 21 publications

References 6 publications

Prosopis: a global assessment of the biogeography, benefits, impacts and management of one of the world's worst woody invasive plant taxa

Prosopis: a global assessment of the biogeography, benefits, impacts and management of one of the world's worst woody invasive plant taxa

Costs, benefits and management options for an invasive alien tree species: The case of mesquite in the Northern Cape, South Africa

Does height of exposure in the canopy influence egg mortality inAcanthoscelides macrophthalmus(Coleoptera: Chrysomelidae), a biological control agent ofLeucaena leucocephalain South Africa?

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