The economic cost of Argentine stem weevil in pastures in New Zealand

Prestidge, R. A.; Barker, G. M.; Pottinger, R. P.

doi:10.30843/nzpp.1991.44.10825

Cited by 57 publications

(39 citation statements)

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“…The Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae), is a severe pest of New Zealand pastures that has been estimated to cause NZ$78–251 million worth of damage annually (Prestidge et al 1991). Since the early 1980s there has been notable progress in the weevil’s management using grass resistance based on the clavicipitaceous endophyte fungus Neotyphodium lolii (Latch, Christensen & Samuels) Glenn, Bacon and Hanlin (Fletcher & Easton 1997).…”

Section: Introductionmentioning

confidence: 99%

Unexpected presence of larvae of Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae), in New Zealand pasture thatch

Goldson¹,

Proffitt²,

Baird³

2001

Australian Journal of Entomology

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A study conducted in the summers of 1997-1998 and 1998-1999 in Canterbury, New Zealand, revealed that just under one-third of the Listronotus bonariensis larval population was present in the ryegrass pasture thatch. Hitherto it had been assumed that a much smaller proportion of larvae existed in the thatch, typically in transit from tiller to tiller. Overall, neonate (non-feeding) first-instar larvae comprised 45% of the total larvae extracted from the tillers, whereas they made up only 8% of all the larvae extracted from the thatch. Conversely, 18% of the total fourth-instar larvae were extracted from the tillers compared with 27% from the thatch. The frequencies of occurrence of the other instars in the tillers and thatch were intermediate between the neonate first-instar larvae extremes. The lack of fit of the larval data to a simple ordinal categorical model indicated larval movement into the thatch after the first instar and net migration out of the thatch as late instars. A technique is presented whereby tiller and thatch larval populations can be extracted simultaneously. It is suggested that on the basis of this study, earlier L. bonariensis larval population data sets could be corrected to account for the thatch populations of larvae.

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Section: Introductionmentioning

confidence: 99%

Unexpected presence of larvae of Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae), in New Zealand pasture thatch

Goldson¹,

Proffitt²,

Baird³

2001

Australian Journal of Entomology

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“…Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) is a major pasture pest in New Zealand (Prestidge et al 1991). A parthenogenetic parasitoid, Microctonus hyperodae Loan (Hymenoptera: Braconidae), has been established in this country as a biological control agent of L. bonariensis (Goldson et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Influence of liquid food on fecundity and longevity of Microctonus hyperodae Loan

Phillips¹

1998

pnzppc

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Microctonus hyperodae Loan (Hymenoptera: Braconidae) is an introduced parasitoid of the pasture pest Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae). This paper describes the effect of providing honey solution to caged M. hyperodae females derived from three South American geographic populations (ecotypes) on their fecundity and longevity. Both the longevity and fecundity of parasitoids from all three ecotypes was increased when they had access to honey. There was no significant difference between ecotypes in either overall fecundity or longevity. There was evidence of an interaction between the honey and ecotype treatments in the fecundity data. The fecundity of females from the Concepcion ecotype (Chile) tended to be lower than that of the Mendoza (Argentina) and Colonia ecotypes when honey was not available, while all ecotypes had similar fecundities when they had access to honey.

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“…Microctonus hyperodae Loan (Hymenoptera: Braconidae) was released in 1991 against Argentine stem weevil Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae) . Listronotus bonariensis is of South American origin and causes significant damage to ryegrass pasture in New Zealand (Prestidge et al 1991). The successful establishment and spread of M. hyperodae has been documented in detail (e.g.…”

Section: Introductionmentioning

confidence: 99%

Parasitism by Microctonus aethiopoides on a novel host Listronotus bonariensis in Canterbury pastures

McNeill¹,

Kean²,

Goldson³

2002

NZPP

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The parasitoids Microctonus aethiopoides and M. hyperodae have been introduced as biological control agents against Sitona discoideus and Argentine stem weevil Listronotus bonariensis respectively. Collections from ryegrass/white clover pastures in mid-Canterbury found that M. aethiopoides was widespread in L. bonariensis, despite the weevil being a novel host. Microctonus aethiopoides was recovered from 83% of the 65 sites sampled in Canterbury, with parasitism rates of 0.4-19%. Studies in lucerne crops showed that M. aethiopoides preferentially parasitised its natural host S. discoideus, although in some cases up to 10% of L. bonariensis found in the lucerne were parasitised. A possible reason for the prevalence of M. aethiopoides in Canterbury pasture was that the widely-dispersive flights of S. discoideus from aestivation sites provided a source for re-infection of the parasitoid into ryegrass pasture. Analysis of field parasitism suggested that parasitism of L. bonariensis by M. aethiopoides was negatively correlated with parasitism by M. hyperodae.

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The economic cost of Argentine stem weevil in pastures in New Zealand

Cited by 57 publications

References 0 publications

Unexpected presence of larvae of Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae), in New Zealand pasture thatch

Unexpected presence of larvae of Argentine stem weevil, Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae), in New Zealand pasture thatch

Influence of liquid food on fecundity and longevity of <i>Microctonus hyperodae</i> Loan

Parasitism by <i>Microctonus aethiopoides</i> on a novel host <i>Listronotus bonariensis</i> in Canterbury pastures

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