Biological Control of AustralianAcaciaSpecies andParaseriantheslophantha(Willd.) Nielsen (Mimosaceae) in South Africa

Impson, F.A.C.; Kleinjan, C.A.; Hoffmann, J. H.; Post, J.A.; Wood, Alan R.

doi:10.4001/003.019.0210

Cited by 77 publications

(84 citation statements)

References 33 publications

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“…In New Caledonia it was collected (and appears to develop) on A. simplex (recorded on the labels as A. laurifolia), a perennial climber native to the western Pacific region. The species was released against A. melanoxylon in 1986 in South Africa (Donnelly, 1992;Dennill et al, 1999), where it established slowly but now controls A. melanoxylon very successfully (Dennill et al 1999;Impson et al, 2011). In our study we collected M. acaciae from A. glaucocarpa as well, possibly an additional host (Tables 1, 2).…”

Section: Species Diagnoses and Descriptionsmentioning

confidence: 70%

“…Melanterius specimens were collected in 2011, 2012 and 2013 during the main flowering/fruiting season of Acacia species in Australia (August-December), when the weevils are most active on the plants for mating and oviposition (Impson et al, 2011). Collecting was carried out in all Australian states though mainly in New South Wales and Victoria.…”

Section: Methodsmentioning

confidence: 99%

“…It causes extensive damage to its host and is regarded as the most successful of all the Melanterius species imported into South Africa to combat the invasive acacias (Impson et al, 2011). We collected 18 specimens in the Esperance area of Western Australia on A. nigricans (Table 1), which appears to be another host for the species (Table 2).…”

Section: Melanterius Castaneusmentioning

confidence: 99%

“…The species was released in South Africa only in 1993 because of the protracted conflict of interest between biological control of invasive weeds and commercial benefit of particularly A. mearnsii, one of its hosts (Dennill & Donnelly, 1991;Impson & Moran, 2004). Several initial attempts to establish it on A. mearnsii failed, and also later releases of stocks from different localities in Australia yielded poor results (Table 1 in Dennill et al, 1999), but it finally established at low to moderate levels in some locations (Impson et al, 2011). The possibility of having released unsuitable or incompatible strains or biotypes of M. maculatus is one of the explanations suggested as reason for this failure (Dennill et al 1999 A. decurrens, on which its impact by 2011 was considered moderate (Impson et al, 2011(Impson et al, ), and in 2003(Impson et al, , 2006 and 2008 against respectively A. pycnantha, A. baileyana and A. podalyriifolia, on which its impact was not yet ascertained by 2011 (Impson et al, 2011).…”

Section: Melanterius Maculatusmentioning

confidence: 99%

“…Several initial attempts to establish it on A. mearnsii failed, and also later releases of stocks from different localities in Australia yielded poor results (Table 1 in Dennill et al, 1999), but it finally established at low to moderate levels in some locations (Impson et al, 2011). The possibility of having released unsuitable or incompatible strains or biotypes of M. maculatus is one of the explanations suggested as reason for this failure (Dennill et al 1999 A. decurrens, on which its impact by 2011 was considered moderate (Impson et al, 2011(Impson et al, ), and in 2003(Impson et al, , 2006 and 2008 against respectively A. pycnantha, A. baileyana and A. podalyriifolia, on which its impact was not yet ascertained by 2011 (Impson et al, 2011). We collected a total of 339 specimens of Melanterius maculatus from the Australian Capital Territory, New South Wales, Queensland, South Australia, Tasmania and Victoria, on 33 species of Acacia (Table 1).…”

Section: Melanterius Maculatusmentioning

confidence: 99%

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No part of this publication may be reproduced, stored, transmitted or disseminated, in any form, or by any means, without prior written permission from the publisher, to whom all requests to reproduce copyright material should be directed in writing.This authorization does not extend to any other kind of copying, by any means, in any form, and for any purpose other than private research use. AbstractThis paper presents the results of a three-year collecting and research project on Melanterius weevils in Australia, aimed mainly at discovering new host associations and assessing their fit to the emerging reconstruction of phylogenetic relationships in the large genus Acacia. A revised and extended diagnosis of the genus Melanterius is provided, as well as characters differentiating the genus from related and/or similar Australian genera classified in the tribe Cleogonini. Given the size (79 species) and morphological variation of Melanterius, and to facilitate the assessment of co-evolutionary patterns between the weevils and their hosts, the genus is divided into six tentative species groups characterised by particular morphological traits. New host and locality data are recorded for 23 species, including five species described as new to science, M. abbreviatus sp. n., M. curvistriatus sp. n., M. psittacoides sp. n., M. pungalinae sp. n. and M. tesseymani sp. n. For each species, salient characters and a summary of known host plant species are provided. Melanterius tasmaniensis (Lea, 1909) comb. et stat. n. is raised from a subspecies of Melanteriosoma costatum to species level. All recorded host associations of Melanterius known to us are summarised, including those published, those recorded on label data associated with specimens in the Australian National Insect Collection and those recorded during this study. These host records are differentiated into true host associations (based on specimens reared from seeds), putative associations (based on long series of specimens collected from plants) and coincidental associations (based on single specimens collected from PINZÓN-NAVARRO ET AL.4 · Zootaxa 4298 (1) © 2017 Magnolia Press plants). Altogether, Melanterius weevils are recorded from 71 species of Acacia, still a small number in view of the ca. 1000 described species of Acacia, but it is likely that many or most of the other species are also hosts of Melanterius species or of the closely related genus Lybaeba. The pattern of host associations in evidence indicates that most species of Melanterius are not host-specific, developing in the seeds of a number of apparently related Acacia species. Nevertheless, several Melanterius species appear to have the potential to be employed as biocontrol agents if their main hosts become invasive weeds.

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Section: Species Diagnoses and Descriptionsmentioning

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Section: Melanterius Castaneusmentioning

confidence: 99%