Sampling Argentine stem weevil,<i>Listronotus bonariensis</i>(Kuschel), populations in pasture: the egg stage

Barker, G. M.; Addison, P. J.

doi:10.1080/00288233.1990.10428469

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…L. bonariensis prepares to oviposit by chewing a hole in the leaf sheath of a tiller and then via the hole, insert eggs between the upper and lower epidermis of the leaf sheath. When the larvae hatch they typically bore into the tiller and move downwards toward the base (Barker and Addison, 1990 ). This study has shown that L. bonariensis oviposition was significantly lower on native grasses compared with hybrid ryegrass.…”

Section: Discussionmentioning

confidence: 99%

Is the Invasive Species Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) (Argentine Stem Weevil) a Threat to New Zealand Natural Grassland Ecosystems?

et al. 2016

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Listronotus bonariensis (Argentine stem weevil) is a stem-boring weevil that has become a major pasture pest in New Zealand, and cool climate turf grass in Australia. This species is also frequently found in native tussock grassland in New Zealand. Laboratory and field trials were established to determine the risk posed to both seedlings and established plants of three native grass species compared to what happens with a common host of this species, hybrid ryegrass (L. perenne X L. multiflorum). Adult weevil feeding damage scores were higher on Poa colensoi and Festuca novae-zelandiae than Chionochloa rigida. Oviposition was lower on P. colensoi than hybrid ryegrass, and no eggs were laid on F. novae-zelandiae. In field trials using the same four species established as spaced plants L. bonariensis laid more eggs per tiller in ryegrass in a low altitude pasture site than in ryegrass in a higher altitude site. No eggs were found on the three native grass species at the tussock sites, and only low numbers were found on other grasses at the low altitude pasture site. Despite this, numbers of adult weevils were extracted from the plants in the field trials. These may have comprised survivors of the original weevils added to the plants, together with new generation weevils that had emerged during the experiment. Irrespective, higher numbers were recovered from the tussock site plants than from those from the pasture site. It was concluded that L. bonariensis is likely to have little overall impact, but a greater impact on native grass seedling survival than on established plants.

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Section: Discussionmentioning

confidence: 99%

Is the Invasive Species Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) (Argentine Stem Weevil) a Threat to New Zealand Natural Grassland Ecosystems?

et al. 2016

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“…To convert eggs counts per 200 tillers, the number of eggs per square meter was calculated from tiller counts on 50 turf plugs, each 50 mm in diameter. These sampling techniques provided estimates of L. bonariensis egg and grass tillers populations with standard errors Ͻ15% of the means (Barker and Addison 1990). The frequency of N. lolii infection in ryegrass was determined each autumn and spring by microscopical examination (400ϫ magniÞcation) of sheath tissues from 50 randomly selected ryegrass tillers that had been stained in heated lactophenol-aniline blue.…”

Section: Methodsmentioning

confidence: 99%

Biology of the Introduced Biocontrol AgentMicroctonus hyperodae(Hymenoptera: Braconidae) and Its HostListronotus bonariensis(Coleoptera: Curculionidae) in Northern New Zealand

Barker

2013

Environ Entomol

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“…Sampling of infested grassland using sweep nets after dark, when adults are feeding, can provide good estimates of population size, as can direct soil sampling (May, ; Barker and Addison, ; Proffitt et al., ). Sticky traps can be used to capture flying adults (Goldson et al., ).…”

Section: Pest Categorisationmentioning

confidence: 99%

Pest categorisation of Listronotus bonariensis

Jeger¹,

Bragard²,

Caffier³

et al. 2018

EFS2

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The Panel on Plant Health performed a pest categorisation of Listronotus bonariensis (Coleoptera: Curculionidae), the Argentine stem weevil, for the EU. L. bonariensis is a well-defined species, recognised as a serious pest of pasture grasses, especially Lolium spp. and Poa annua, in New Zealand, and a rare pest of cereals in Argentina, Brazil and New Zealand. Larvae feed within the tillers and stems of grasses; adults can cut emerging cotyledons although they usually graze on leaves. Larval damage is most serious. Larval feeding causes a reduction in pasture quality that impacts on the production of grazing animals. L. bonariensis is not known to occur in the EU and is listed in Annex IIAI of Council Directive 2000/29/EC. L. bonariensis established in New Zealand via imported grass seeds and has been intercepted on grass seeds entering the EU. Considering the climatic similarities of the regions where the pest occurs and the very great extent to which hosts are grown across the EU, L. bonariensis has the potential to establish within the EU with two or three generations possible per year. Impacts could occur in grassland pastures and perhaps occasionally in cereals. In New Zealand, endophytic fungi occurring on potential hosts deter L. bonariensis from ovipositing on leaves and are toxic to larvae. Whether endophytic fungi on grasses in Europe could provide some resistance to L. bonariensis is uncertain. Phytosanitary measures are available to reduce the likelihood of introduction of this weevil. L. bonariensis fits all of the criteria assessed by EFSA to satisfy the definition of a Union quarantine pest. L. bonariensis does not meet the criterion of occurring in the EU territory for it to be regarded as a Union regulated non-quarantine pest.

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Sampling Argentine stem weevil,Listronotus bonariensis(Kuschel), populations in pasture: the egg stage

Cited by 4 publications

References 21 publications

Is the Invasive Species Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) (Argentine Stem Weevil) a Threat to New Zealand Natural Grassland Ecosystems?

Is the Invasive Species Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) (Argentine Stem Weevil) a Threat to New Zealand Natural Grassland Ecosystems?

Biology of the Introduced Biocontrol AgentMicroctonus hyperodae(Hymenoptera: Braconidae) and Its HostListronotus bonariensis(Coleoptera: Curculionidae) in Northern New Zealand

Pest categorisation of Listronotus bonariensis

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