Biological Control Success of a Pasture Pest: Has Its Parasitoid Lost Its Functional Mojo?

Tomasetto, Federico; Casanovas, Paula; Brandt, S.; Goldson, S. L.

doi:10.3389/fevo.2018.00215

Cited by 12 publications

(7 citation statements)

References 29 publications

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“…Third, our study presents evidence of shared parasitism, particularly by the egg parasitoid T. remus on both FAW and B. fusca . Biological control with parasitoids is a natural way of reducing crop damage and yield losses (Tomasetto et al., 2018), and it is an environmentally viable alternative to insecticide use (van Lenteren, 2000). FAW and B. fusca in this study shared the same parasitoids at different developmental stages, with much greater parasitism by the egg parasitism T. remus than parasitism of the other life stages.…”

Section: Discussionmentioning

confidence: 99%

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Spatio‐temporal partitioning and sharing of parasitoids by fall armyworm and maize stemborers in Cameroon

Abang

Kuate

Nanga

et al. 2020

J Applied Entomology

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Biological invasions are commonly defined as the establishment of non-native organisms outside their natural geographical range, which causes, or has the potential to cause, environmental, social or economic change (Didham et al., 2007). There are numerous examples of the ecological consequences and the impact of the intentional or accidental introduction of alien species to a new environment structure of arthropod communities (

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Section: Discussionmentioning

confidence: 99%

“…Biological control with parasitoids is a natural way of reducing crop damage and yield losses (Tomasetto et al, 2018), and it is an environmentally viable alternative to insecticide use (van Lenteren, 2000).…”

Section: Discussionmentioning

confidence: 99%

Spatio‐temporal partitioning and sharing of parasitoids by fall armyworm and maize stemborers in Cameroon

Abang

Kuate

Nanga

et al. 2020

J Applied Entomology

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“…An economic analysis of biological control of CRW in one region of New Zealand, found that control returned NZD14.78/ha/year and NZD6.86/ha/year for dairy and sheep & beef farms, respectively (Basse et al 2015). Conversely, while M. hyperodae initially provided effective control of ASW (Barker and Addison 2006), recent evidence points to a breakdown in parasitoid efficiency and resurgence of weevil damage (Tomasetto et al 2018).…”

Section: New Zealandmentioning

confidence: 99%

Diversity and impacts of key grassland and forage arthropod pests in China and New Zealand: An overview of IPM and biosecurity opportunities

McNeill¹,

Tu²,

Ferguson³

et al. 2021

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For both New Zealand and China, agriculture is integral to the economy, supporting primary production in both intensive and extensive farming systems. Grasslands have important ecosystem and biodiversity functions, as well providing valuable grazing for livestock. However, production and persistence of grassland and forage species (e.g. alfalfa) is not only compromised by overgrazing, climate change and habitat fragmentation, but from a range of pests and diseases, which impose considerable costs on growers in lost production and income. Some of these pest species are native, but increasingly, international trade is seeing the rapid spread of exotic and invasive species. New Zealand and China are major trading partners with significant tourist flow between the two countries. This overview examines the importance of grasslands and alfalfa in both countries, the current knowledge on the associated insect pest complex and biocontrol options. Identifying similarities and contrasts in biology and impacts along with some prediction on the impact of invasive insect species, especially under climate change, are possible. However, it is suggested that coordinated longitudinal ecological research, carried out in both countries using sentinel grass and forage species, is critical to addressing gaps in our knowledge of biology and impact of potential pests, along with identifying opportunities for control, particularly using plant resistance or biological control.

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“…The koinobiontic solitary parthenogenetic parasitoid M. hyperodae also undergoes a similar number of generations. This parasitoid is host specific ( Goldson et al, 1992 ), is considered to have a high searching efficiency ( Tomasetto et al, 2018 ), and probably uses olfactory cues to search for unparasitised hosts. The Gramineae most damaged by the weevil typically comprises three grass types.…”

Section: Introductionmentioning

confidence: 99%

Plant-Mediated Behavioural Avoidance of a Weevil Towards Its Biological Control Agent

et al. 2022

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New Zealand pastures largely comprising Lolium ryegrass species (Poales: Poaceae) are worth $19.6B and are subject to major pest impacts. A very severe pest is the Argentine stem weevil Listronotus bonariensis (Kuschel) (Coleoptera: Curculionidae). This has been previously suppressed by the importation biological control agent, Microctonus hyperodae Loan (Hymenoptera: Braconidae). However, this suppression has recently declined and is subject to investigation. It has been hypothesised that grass type influences the parasitism avoidance behaviour by the weevil and thus parasitism rates. This study explored the hypothesis using three common pasture grasses: a diploid Lolium perenne x Lolium multiflorum hybrid ryegrass (cv. Manawa), a tetraploid Italian ryegrass L. multiflorum Lam. (cv. Tama), and a diploid perennial ryegrass L. perenne L. (cv. Samson). The described laboratory-based microcosm methodology determined the extent of weevil avoidance behaviour on each of these three grasses when subjected to the parasitoid. Such reaction was gauged by the extent of reduced weevil on-plant presence and feeding compared to the control populations. In the absence of the parasitoid, the hybrid cv. Manawa ryegrass is as highly favoured by the weevil as the tetraploid cv. Tama. On diploid cv. Samson, feeding is considerably less. In the presence of the parasitoid, weevils on the tetraploid cv. Tama plants showed little avoidance activity in response to the parasitoid and it can be argued that the benefits of staying on this plant outweighed the possibility of parasitism. Conversely and surprisingly, in the parasitoid’s presence, weevils on diploid cv. Manawa showed very strong avoidance behaviour leading to levels of exposure similar to those found on the less-preferred diploid cv. Samson. These findings reflect how weevil parasitism rates have declined in most Lolium grasses, particularly diploids, since the 1990s, but not in the tetraploid L. multiflorum. This contribution supports the hypothesis that the decline in weevil parasitism rates has been the result of rapid evolution arising from parasitoid-induced selection pressure and the countervailing effect of the nutritional quality of the host plants.

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Biological Control Success of a Pasture Pest: Has Its Parasitoid Lost Its Functional Mojo?

Cited by 12 publications

References 29 publications

Spatio‐temporal partitioning and sharing of parasitoids by fall armyworm and maize stemborers in Cameroon

Spatio‐temporal partitioning and sharing of parasitoids by fall armyworm and maize stemborers in Cameroon

Diversity and impacts of key grassland and forage arthropod pests in China and New Zealand: An overview of IPM and biosecurity opportunities

Plant-Mediated Behavioural Avoidance of a Weevil Towards Its Biological Control Agent

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