The effect of Argentine stem weevil on pasture composition in Canterbury

Goldson, S. L.; Trought, T. E. T.

doi:10.30843/nzpp.1980.33.10706

Cited by 9 publications

(7 citation statements)

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“…In the hybrid ryegrass (L. multiflorum × perenne) cv. Manawa, which is particularly vulnerable to ASW, yield increases due to insecticide were found to be as high as 230% by Goldson and Trought (1980) and 91% by Barker et al (1984). ASW attack was also found to reduce the ryegrass component and increase the weed content in small plots of Italian ryegrass (Lolium multiflorum) (Prestidge 1991).…”

Section: Economic Damagementioning

confidence: 96%

“…Some pests such as grass grub, manuka beetle and porina are cosmopolitan feeders, utilising grasses, legumes and herbs and likely change their food plants in response to nutritive requirements as do most insect herbivores (Behmer 2009). Others such as ASW (Goldson and Trought 1980) and black beetle (Bell et al 2011), in the context of New Zealand agriculture, feed only on grasses whereas CRW is almost entirely restricted to clovers (e.g. Hardwick 1998).…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Ferguson

Barratt

Bell

et al. 2018

New Zealand Journal of Agricultural Research

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Two exotic pests, Argentine stem weevil (ASW) and clover root weevil (CRW) are causing damage estimated at up to $200 M p.a. and $235 M p.a. respectively in dairy and sheep and beef pastures. While CRW is subject to successful biological control management it still causes considerable losses. Lesser pests also contribute to lost production, particularly as they often coexist with more major pests. However, their economic cost to New Zealand is difficult to calculate due to the variable nature of infestations on both temporal and spatial scales. At farm and paddock level, it is abundantly clear that substantial savings could be made if pest management is achieved. It is equally clear that in many instances the tools to do so are limited but if developed would contribute substantially to farm profitability.

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Section: Economic Damagementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Ferguson

Barratt

Bell

et al. 2018

New Zealand Journal of Agricultural Research

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“…Italian (and hybrid) ryegrasses are susceptible to Argentine stem weevil (Listronatus bonariensis (Kuschel); (Coleoptera: Curculionidae» and support large populations (Kelsey 1958;Hoy 1960;Goldson 1979Goldson ,1982Goldson & Trought 1980;Barker 1989). Some Italian ryegrasses (for example, 'Concord', 'Corvette', 'Progrow') are infected with an endophytic fungus, called Acremonium-like (Latch et al 1988) but it is unknown whether this fungus imparts resistance to the host from Argentine stem weevil attack as occurs with Acremonium lolii Latch, Christensen & Samuels in perennial ryegrass (pottinger et al 1985).…”

Section: Susceptibility Of Italian Ryegrasses (Lolium Multiflorummentioning

confidence: 99%

Susceptibility of Italian ryegrasses (Lolium multiflorumLam.) to Argentine stem weevil (Listronotus bonariensis(Kuschel)) feeding and oviposition

Prestidge

1991

New Zealand Journal of Agricultural Research

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The susceptibility of Italian ryegrasses (Lolium multiflorum Lam.) to Argentine stem weevil (Listronotus bonariensis (Kuschel» was investigated in laboratory feeding and oviposition experiments, and in a field trial. Some Italian ryegrasses (for example, 'Concord', 'Corvette', 'Progrow') are infected with an Acremonium-like endophytic fungus. The presence of Acremoniumlike endophyte did not deter or reduce adult Argentine stem weevil feeding or oviposition. The introduction of Acremonium loW Latch, Christensen & Samuels endophyte isolated from perennial ryegrass (L. perenne L.) into L. multiflorum conferred resistance to L. multiflorum from Argentine stem weevil feeding. Lolitrem B (a tremorgenic mycotoxin) concentrations ranged from 0.2 to 4.50 Jlg/g and from 0.01 to 0.09 Jlg/g dry weight of grass inA.lolii-infectedandAcremoniumlike infected L. multiflorum, respectively. This indicates that the level of insect and animal feeding deterrents and toxins are dependent on the species of endophytic fungus in the plant. The Italian ryegrasses produced 0-1298 kg more dry matter (DM) than 'Ellett' during the period 3 June-IS December 1986. Largest Argentine stem weevil populations were recorded on 'Grasslands Moata'. There were no significant differences in the density of Argentine stem weevil between the Italian ryegrass cultivars.

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“…Such work is of significance because it was conducted in a dryland ecosystem, typical of where L. bonariensis can be particularly damaging (e.g. Goldson & Trought, 1980). Based on the monitoring work, this contribution therefore uses historical data to investigate the regulation of the weevil pest populations prior to, and somewhat during, the establishment of the parasitoid in Canterbury dryland conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Such work is of significance because it was conducted in a dryland ecosystem, typical of where L. bonariensis can be particularly damaging (e.g. Goldson & Trought, 1980).…”

Section: Introductionmentioning

confidence: 99%

Argentine stem weevil (Listronotus bonariensis, Coleoptera: Curculionidae) population dynamics in Canterbury, New Zealand dryland pasture

Goldson

Barron

Kean

et al. 2010

Bull. Entomol. Res.

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The Argentine stem weevil (Listronotus bonariensis) was an economically important pest in New Zealand pastures until the release of the parasitoid Microctonus hyperodae. This contribution uses historical data to investigate the regulation of the pest populations prior to, and somewhat during, the establishment of this parasitoid in dryland Canterbury, New Zealand. Thus, a significant goal of this study is to provide an L. bonariensis population dynamics baseline for any future work that aims to analyse the full effects of M. hyperodae on the weevil, now that equilibrium with the weevil host has been reached.The population dynamics of L. bonariensis, based on a life-table approach, were investigated using data collected regularly for eight years from populations in Canterbury, New Zealand. The key factor affecting end-of-season L. bonariensis density was found to be variation in second generation fourth instar prepupal and pupal mortality. This may have been caused by arrested development and ongoing mortality resulting from the onset of cooler autumnal conditions.A compensatory response was found in recruitment to the second summer weevil generation, whereby the realised fecundity of the emergent first summer generation of weevils was found to be negatively related to the density of adult weevils per ryegrass tiller. This is the first time that this has been found via long-term population analysis of L. bonariensis, although indications of this have been found elsewhere in caging, pot and small plot experiments.In this study, the effect of the parasitoid biocontrol agent Microctonus hyperodae on L. bonariensis population dynamics was unclear, as the analysis covered a period when the parasitoid Microctonus hyperodae was introduced and still establishing. It does, however, raise important questions for future analysis in terms of the interaction between parasitism and unrealised fecundity.The results in this contribution also highlighted regional differences. Overwintering mortality of adult weevils in Canterbury was constant between years, whilst earlier studies in the North Island Waikato region indicated this mortality was density dependent. In addition, the availability of tillers in endophyte-free ryegrass pastures in Canterbury had no influence on egg and early-instar larval survival, which contrasts with the finding from endophytic Waikato pastures.

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The effect of Argentine stem weevil on pasture composition in Canterbury

Cited by 9 publications

References 0 publications

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Susceptibility of Italian ryegrasses (Lolium multiflorumLam.) to Argentine stem weevil (Listronotus bonariensis(Kuschel)) feeding and oviposition

Argentine stem weevil (Listronotus bonariensis, Coleoptera: Curculionidae) population dynamics in Canterbury, New Zealand dryland pasture

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