Hymenoptera wasps associated with the Asian gall wasp of chestnut (Dryocosmus kuriphilus) in Calabria, Italy

Palmeri, Vincenzo; Cascone, Pasquale; Campolo, Orlando; Grande, Saverio B.; Laudani, Francesca; Malacrinò, Antonino; Guerrieri, Emilio

doi:10.1007/s12600-014-0411-8

Cited by 11 publications

(5 citation statements)

References 14 publications

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“…In Europe, ACGW galls are parasitized by native parasitoids of oak gall wasps (Panzavolta et al 2013;Palmeri et al 2014;Francati et al 2015), and by a parasitoid wasp from its natural range, Torymus sinensis (Hymenoptera, Torymidae), which has been introduced in Europe as a biocontrol agent (see also Aebi et al 2007;Borowiec et al 2014;Matošević et al 2014). Native to China, this parasitoid is univoltine (with about 3% of its population having a 12 months diapause period, Quacchia et al 2014a, b;Ferracini et al 2015), with adults emerging in early spring and females laying eggs in newly-formed ACGW galls.…”

Section: Study Speciesmentioning

confidence: 99%

“…Spring galls were sampled to collect native parasitoids of oak gall wasps that were expected to parasitize ACGW larvae. They belong to six main families of chalcid wasps (Eulophidae, Eupelmidae, Eurytomidae, Ormyridae, Pteromalidae, Torymidae), and have been identified on oak cynipids (Askew et al 2013) or on ACGW (Aebi et al 2006(Aebi et al , 2007Panzavolta et al 2013; Al Khatib et al , 2015Palmeri et al 2014). It is important to note that for some wasps, molecular characterization (Cytochrome Oxydase I) revealed the presence of probable cryptic species (Borowiec, unpubl.…”

Section: Parasitoid Collectionmentioning

confidence: 99%

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Plant neighbour identity and invasive pathogen infection affect associational resistance to an invasive gall wasp

et al. 2017

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Theory predicts that mixed forests are more resistant to native pests than pure forests (i.e. associational resistance) because of reduced host accessibility and increased top-down control by natural enemies. Yet, whether the same mechanisms also apply to invasive pests remains to be verified. We tested the hypothesis of associational resistance against the invasive Asian chestnut gall wasp (ACGW, Dryocosmus kuriphilus) by comparing ACGW infestation rates on chestnuts (Castanea sativa) in stands varying in species composition (chestnut alone or associated with oaks, pines or ashes). We investigated the effects of reduced chestnut density and frequency in mixed stands, as well as the effect of biotic interactions between ACGW, its parasitoids and the chestnut blight disease (caused by Cryphonectria parasitica). ACGW infestation rates were significantly lower in chestnut-oak and chestnut-ash mixtures than in pure chestnut stands and chestnut-pine mixtures. Infestation rate decreased with decreasing chestnut relative proportion. The composition of native parasitoid communities emerged from galls significantly differed between pure and mixed chestnut stands, but not the species richness or abundance of parasitoids. The abundance of the introduced parasitoid Torymus sinensis was not correlated with ACGW infestation rates and was independent of stand composition. Blight symptoms modified ACGW infestation rates with taller trees being preferred when they were asymptomatic but avoided when they presented blight disease damage. Our results suggest that conservation biological control based on tree species mixtures could contribute to reducing the damage of invasive forest pests.Excepting for the first and last authors, the order of authors is alphabetical.

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Section: Study Speciesmentioning

confidence: 99%

Section: Parasitoid Collectionmentioning

confidence: 99%

Plant neighbour identity and invasive pathogen infection affect associational resistance to an invasive gall wasp

et al. 2017

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“…Parasitoid abundance and percentage of parasitism 3-5 years after colonization by D. kuriphilus, ranged from 0.37 to 7.63 and from 0.11% to 1.86%, respectively (excluding the peaks reached in 2011 at CAV: 29.76 and 8.49%). The abundance and percentage of parasitism reported in the literature range from 0.02 to 13.09 and from 0.50% to 5.74%, respectively (Ôtake et al, 1982;Murakami et al, 1995;Ito & Hijii, 2000;Aebi et al, 2006;Quacchia et al, 2012;Mato sevi c & Melika, 2013;Panzavolta et al, 2013;Palmeri et al, 2014). However, Santi & Maini (2011), reported an abundance ranging from 35.4 to 79.4 and percentage of parasitism between 3.0% and 31.8% in the year following the arrival of D. kuriphilus, while Ito & Hijii (2000) assessed a parasitism percentage of 24.3%.…”

Section: Impact Of the Native Complex Of Parasitoidsmentioning

confidence: 99%

Native and introduced parasitoids in the biocontrol of Dryocosmus kuriphilus in Veneto (Italy)

Colombari

Battisti

2016

EPPO Bulletin

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The invasive gallmaker Dryocosmus kuriphilus is a threat to chestnut stands and it is necessary to control it in order to maintain a satisfactory nut yield. A preliminary evaluation of the native natural enemies emerging from the galls, mainly parasitoids associated with native cynipid gallmakers, revealed that they were not able to contain the pest. Consequently, a classical biological control programme using Torymus sinensis started in 2010, with almost 500 releases being made in 6 years. The parasitoid achieved a satisfactory level of control of the pest over a period of time shorter than expected based on literature related to other countries. The success in the study area might be explained by specific traits intrinsic to T. sinensis, such as its high spread capability via stratified dispersal (i.e. a combination of short‐ and long‐distance flights), together with a large availability of host galls and limited competition with other parasitoids.

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“…The species also represents a perturbation to the natural trophic relationships between the community of native parasitoids and oak gall wasps [26][27][28]. ACGW was first detected in the Calabria region (southern Italy) in 2009 [29] about seven years after its first record in Northern Italy (Piedmont), and heavy infestations of chestnut fields in the Aspromonte National Park have since been reported [18]. ACGW is a univoltine species whose females lay their eggs into chestnut buds, which induces the formation of galls on the growing shoots that can inhibit shoot development and flowering [30,31].…”

Section: Introductionmentioning

confidence: 99%

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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Hymenoptera wasps associated with the Asian gall wasp of chestnut (Dryocosmus kuriphilus) in Calabria, Italy

Cited by 11 publications

References 14 publications

Plant neighbour identity and invasive pathogen infection affect associational resistance to an invasive gall wasp

Plant neighbour identity and invasive pathogen infection affect associational resistance to an invasive gall wasp

Native and introduced parasitoids in the biocontrol of Dryocosmus kuriphilus in Veneto (Italy)

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

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