P.J. Gerard

Host size and sex effects on parasitism by the Irish strain of Microctonus aethiopoides in the laboratory and the field

P.J. Gerard, Tina Eden, Derrick Wilson

Abstract The impact of host size and sex on parasitism by the Irish strain of the hymenopteran parasitoid Microctonus aethiopoides Loan was investigated in the laboratory and in the field. Field data showed that while there was a large overlap, female adults …

The New Zealand spread and distribution of the South American weevils Floresianus sordidus Hustache and Atrichonotus taeniatulus (Berg)

P.J. Gerard, Deborah J. Wilson, Gary M. Barker, Paul J. Addison

The South American Flores weevil (Floresianus sordidus Hustache, 1939) and little fringed weevil Atrichonotus taeniatulus (Berg, 1881) (Coleoptera, Curculionidae) are now common in northern areas of the North Island of New Zealand. Historic records were investigated to determine the distribution and prevalence …

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Does brood size in field populations of Microctonus aethiopoides Loan vary with host availability?

P.J. Gerard, John M. Kean, Catherine Ann Cameron

The release of a gregarious parasitoid as a biological control agent in a relatively simple grassland ecosystem provides a rare opportunity to observe the outcomes of parasitoid density dependent oviposition behaviour in the field. A retrospective analysis was undertaken of monthly host …

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Winter cover crops to reduce herbicide inputs into spring‐planted maize pastoral systems in New Zealand

M.R. Trolove, Trevor Kenneth James, Benjamin Haddon Wynne-Jones, Harold Victor Henderson et autres

ABSTRACT The use of cover crops can improve the environmental sustainability of intensive cropping systems. A five‐year field trial was undertaken to evaluate the effect of multi‐season cover cropping on weed suppression within a no‐till spring‐planted maize system in the Waikato region …

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Impact of guttation fluid from perennial ryegrass infected with different strains of Epichloe festucae var. lolii endophyte on Microctonus aethiopoides adult longevity

P.J. Gerard, Ela Hiszczyńska-Sawicka

Perennial ryegrass (Lolium perenne L.) grows in association with a fungal endophyte Epichloe festucae var. lolii (Latch, Christensen & Samuels) Bacon & Schardl, which produces alkaloids that protect the grass against grazing by mammals and insects. These alkaloids are found in guttation …

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Behaviour drives contemporary evolution in a failing insect-parasitoid importation biological control programme

Morgan W. Shields, S. D. Wratten, Chikako van Koten, Craig B. Phillips et autres

Biological control of pests continues to become more important in agriculture as pesticides are being withdrawn. However, successful control can be compromised by contemporary evolution. Recent work in New Zealand has shown that the once-successful biological control programme of the sexually reproducing …

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Observations on the biology of the Flores weevil,Floresianus sordidusHustache in northern New Zealand

P.J. Gerard, Deborah J. Wilson, J. J. Dymock

Flores weevil (Floresianus sordidus Hustache, 1939 (Coleoptera, Curculionidae)) is now common in northern areas of the North Island of New Zealand. Historic records and new field data were investigated to learn more of the biology, seasonality, and likely pest status of the …

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Climate change impacts on pest ecology and risks to pasture resilience

Sarah A. Mansfield, C.M. Ferguson, P.J. Gerard, David Hodges et autres

It is well understood that damage by insect pests can have serious consequences for pasture resilience. However, the impacts of climate change on pastoral systems, the responses of insect pests, and implications for pest impact mitigation are unclear. This paper reviews pest …

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Contrasting host: parasitoid synchrony drives differing levels of biocontrol by two introduced Microctonus spp. in northern New Zealand pastures

P.J. Gerard, Derrick J. Wilson, Martin P. Upsdell

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Publisher Correction to: Integrating adverse effect analysis into environmental risk assessment for exotic generalist arthropod biological control agents: a three-tiered framework

Débora Pires Paula, David Alan Andow, B.I.P. Barratt, Robert S. Pfannenstiel et autres

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Integrating adverse effect analysis into environmental risk assessment for exotic generalist arthropod biological control agents: a three-tiered framework

Débora Pires Paula, David Alan Andow, B.I.P. Barratt, Robert S. Pfannenstiel et autres

br, us, nz, cl, ar, nl, dk, au, it, jp (code pays fourni par la source)

Correction to: Risk assessment procedures for biological control agents in New Zealand: two case studies for generalists

P.J. Gerard, B.I.P. Barratt

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