Torymus sinensis Kamijo, a biocontrol agent against the invasive chestnut gall wasp Dryocosmus kuriphilus Yasumatsu in Spain: its natural dispersal from France and the first data on establishment after experimental releases

Nieves‐Aldrey, J. L.; Gil‐Tapetado, Diego; Gavira, Oscar; Boyero, Juan Ramón; Polidori, Carlo; Lombardero, Marı́a J.; Blanco, Diana; Castillo, Carmen Rey del; Rojo, Pilar Rodriguez; Vela, J. M.; Wong, Eva

doi:10.5424/fs/2019281-14361

Cited by 23 publications

(19 citation statements)

References 30 publications

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“…This proliferation is a clear indication of adaptation of this species to ACGW in the study area and confirms results recorded in Italy and other European countries [54,56,57,[72][73][74].…”

Section: Discussionsupporting

confidence: 90%

Short-term Thermal Changes Affect Parasitism on Asian Chestnut Gall Wasp

Bonsignore¹,

Vono²,

Bernardo³

2020

Preprint

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Thermal variations affect tri-trophic interactions involving plants, herbivores, and parasitoids, causing a mismatch between their phenological cycles. In the current environmental context of climate change, climatic factors can undergo profound and sudden changes, such as sudden hot or cold snaps. Here we show that episodes of short but sustained low temperatures have increased, mainly in the month of May, in the last two decades. We subjected galls induced by Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus to cold stress to assess if and how the pest and its parasitoids were affected. Over the course of two years seasonal parasitism, parasitism rates, the relative abundance of each parasitoid species, and mortality of ACGW were calculated. We found that the cold treatment affected both pest and parasitoids, resulting in a reduction in emerging ACGWs and differing ratios of species within the parasitoid community. The striking example was the change in the relative frequency of three species of Eupelmus spp. and of Mesopolobus tibialis, which doubled in thermally-stressed galls in all chestnut fields. The thermal effects on the development of the host and the direct effects of cold temperatures on the surface of galls (i.e., humidity or hardness of the galls) warrant further research in this direction.

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Section: Discussionsupporting

confidence: 90%

Short-term Thermal Changes Affect Parasitism on Asian Chestnut Gall Wasp

Bonsignore¹,

Vono²,

Bernardo³

2020

Preprint

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“…A classical biological control programme involving the introduction of Torymus sinensis Kamijo, 1982, Hymenoptera: Torymidae, an exotic parasitoid, has been underway in Galicia since 2015. Nevertheless, the programme is not expected to have significantly influenced the data on D. kuriphilus abundance (nor the presence), because establishment of the parasitoid was low in Galicia, at least until 2019 (Nieves‐Aldrey et al., 2019; Pérez‐Otero et al., 2017; Xunta de Galicia, 2020).…”

Section: Methodsmentioning

confidence: 99%

Spatial propagation and patterns of abundance ofDryocosmus kuriphilusthroughout an invaded region

Gil‐Tapetado

Castedo‐Dorado

Lombardero

et al. 2020

J Applied Entomology

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“…The use of this allochthonous parasitoid as a biological control agent against ACGW has to date only been authorised by the Spanish Ministry of Agriculture and Fisheries and Food (MAPA) in controlled release assays. However, recent results highlight that established populations of T. sinensis may be useful against ACGW in Spain . Nevertheless, it is calculated that it takes 6–18 years for T. sinensis to effectively reduce ACGW to acceptable levels once it has been introduced .…”

Section: Introductionmentioning

confidence: 99%

“…Biological control with native parasitoids fails to control the pest in territories with ACGW. 13,14 In contrast, the use of its natural enemy, Torymus sinensis Kamijo (Hymenoptera: Torimidae), a specific oriental parasitoid of ACGW, has been widely tested with positive results in many infested countries. In Europe, this torymid was first released in Italy in 2005 and proved to be very effective and successful in the long-term control of this plague.…”

Section: Introductionmentioning

confidence: 99%

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Hot water treatment: an effective method for disinfectingCastanea sativamill. dormant scions againstDryocosmus kuriphilusYasumatsu

Ciordia

García

Loureiro

2020

Pest Management Science

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BACKGROUND The Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus Yasumatsu is the most severe pest of the genus Castanea worldwide. After its arrival in Europe, the insect dispersed rapidly from Italy to other European countries, as well as spreading over long distances within each country because of the unintentional transport of infested chestnut material owing to the fact that infestation inside the dormant buds is visually undetectable. Hot water treatment (HWT) has been tested in terms of pest and diseases control in propagation processes with a wide range of plant material and species, including the Asian chestnut Castanea mollissima cv ‘Qing’. Taking into account the different thermal tolerances of plant species, an experiment to disinfect Castanea sativa scions from ACGW by HWT was performed. The effects of the immersion of dormant scions for 10 min at two water temperatures (49 and 52 °C), with and without a previous period of water hydration, were tested. RESULTS A 10 min soak at 49 °C was effective in killing ACGW larvae while retaining an excellent percentage of successful grafts. The pre‐HWT hydration stage did not influence the success of the treatment. Positive shoot growth was also recorded after HWT. CONCLUSIONS We report for the first time the effectiveness of a simple and environmentally friendly protocol based on hot water for the disinfection of European chestnut (C. sativa) scions against D. kuriphilus. This will enable nurseries to supply plants free from this pest, preventing the insect dispersion, which will have a positive socio‐economic impact to the chestnut tree sector. Also positive environmental impact will be favoured as gall wasp proliferation will decrease. © 2019 Society of Chemical Industry

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Torymus sinensis Kamijo, a biocontrol agent against the invasive chestnut gall wasp Dryocosmus kuriphilus Yasumatsu in Spain: its natural dispersal from France and the first data on establishment after experimental releases

Cited by 23 publications

References 30 publications

Short-term Thermal Changes Affect Parasitism on Asian Chestnut Gall Wasp

Short-term Thermal Changes Affect Parasitism on Asian Chestnut Gall Wasp

Spatial propagation and patterns of abundance ofDryocosmus kuriphilusthroughout an invaded region

Hot water treatment: an effective method for disinfectingCastanea sativamill. dormant scions againstDryocosmus kuriphilusYasumatsu

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