Chestnut tree damage evolution due to Dryocosmus kuriphilus attacks

Gehring, Eric; Bellosi, Bruno; Reynaud, Nicola; Conedera, Marco

doi:10.1007/s10340-019-01146-0

Cited by 20 publications

(18 citation statements)

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“…proportion of attacked buds; Kotobuki et al, 1985) and the percentage of parasitism by T. sinensis since its release. To overcome this limit, we selected proxies of the ACGW outbreak evolution that proved to be reliable epidemic indicators in different European chestnut areas (Borowiec et al, 2018;Ferracini et al, 2019;Gehring et al, 2020) (BC yrs ; Table 1). We finally drew a synthetic damage index calculated as follows:…”

Section: Indicators Of the Acgw Outbreakmentioning

confidence: 99%

“…Without any control, repeated and severe ACGW attacks prevented a normal vegetation of the chestnut trees, affecting stomata conductance as well as CO 2 assimilation capacity (Ugolini et al, 2014) and leading to a reduced capacity of developing buds (Gehring, Bellosi, et al, 2018). This resulted over the years in a malformation of the branch architecture and a general crown deterioration with a corresponding loss in green biomass (up to 70% on average, Gehring, Bellosi, et al, 2018;Gehring et al, 2020). Heavily infested trees displayed a reduced shoot vigour (Ugolini et al, 2014), an increased susceptibility to other biotic stresses, such as the specific chestnut pathogens Cryphonectria parasitica (Murril) Barr and Gnomoniopsis castaneae Tamietti (Lione et al, 2016;Meyer et al, 2015), as well as a significant reduction in non-woody chestnut products, such as nut production (reduction up to 80% of the harvest; Battisti et al, 2014) and in the chestnut component of honey (Gehring, Kast, et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Impact of the Asian gall wasp Dryocosmus kuriphilus on the radial growth of the European chestnut Castanea sativa

Marcolin

Pividori

Colombari

et al. 2021

Journal of Applied Ecology

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The invasion of the Asian chestnut gall wasp Dryocosmus kuriphilus (ACGW) inEurope has caused serious biological and economic impacts on chestnut stands that have been partially solved with the introduction of the biological control agent Torymus sinensis. However, information concerning tree-ring growth during the ACGW epidemic has been lacking so far.2. Using dendrochronology techniques, we analysed the impact of the ACGW on tree-ring growth and the capacity of the chestnut tree to recover when biocontrol was achieved in seven sites covering the area of first detection and subsequent spread of the ACGW in Europe. In each site, a non-target control species (i.e. trees not attacked by the ACGW) has been included as a reference in the analysis. Results show a reduction in the tree-ring increment by 60% on average duringthe ACGW epidemic. Such effects were higher in the magnitude and longer in the duration when compared to other stresses such as insect defoliation or extreme summer droughts. 4. Synthesis and applications. Marked reductions in radial growth were evident in the years of ACGW attack regardless of the age of the chestnut coppices. Since most of the trees only recovered to an almost normal growth rate after 3-4 years of biocontrol by T. sinensis, an immediate release of the antagonist at the first ACGW appearance is highly recommended. The consequences and perspectives of ACGW's attacks on the quality of the timber produced are also discussed.

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Section: Indicators Of the Acgw Outbreakmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of the Asian gall wasp Dryocosmus kuriphilus on the radial growth of the European chestnut Castanea sativa

Marcolin

Pividori

Colombari

et al. 2021

Journal of Applied Ecology

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“…The lack of information on the possible role of climatic regime on gall size contrasts with a wide bulk of studies that showed that gall size is affected by other variables, such as the population density, the settlement period, parasitoid pressure, chestnut tree variety and plant-related microhabitats (Stone and Schönrogge, 2003; Bernardo et al ., 2013; Egan et al ., 2013; Nugnes et al ., 2018; Gehring et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

Climate as a possible driver of gall morphology in the chestnut pest Dryocosmus kuriphilus across Spanish invaded areas

Gil‐Tapetado

Polidori

Gómez

et al. 2020

Bull. Entomol. Res.

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The alien cynipid wasp Dryocosmus kuriphilus Yasumatsu, 1951 is a serious pest of chestnuts (Castanea spp.) in Japan, North America and Europe, causing fruit losses while inducing galls in buds. While D. kuriphilus galls have a recognizable and roughly invariable globular shape, their size varies, reaching up to 4 cm in diameter. Among other factors, such variation may depend on different climatic conditions in different attacked areas. Here, we sampled and measured 375 D. kuriphilus galls from 25 localities throughout the Iberian Peninsula, including both cold and rainy northern (Eurosiberian) areas and warm and dry central-southern (Mediterranean) areas, to test the effects of climate and geographical location on gall morphology. The analyses indicate that gall mass and volume follow a pattern that can be associated with a climatic cline. In particular, the Eurosiberian galls were smaller than the Mediterranean galls according to differences in climatic conditions. In the southern areas, the greater insolation regime does not allow the chestnut trees to be distributed at lower altitudes, but the high rainfall and humidity regime of the mountain enclaves allow their presence. These conditions of insolation and precipitation seem to influence the morphological characteristics of the galls of D. kuriphilus.

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“…It has been established that the local abundance of D. kuriphilus populations generally increases with the time elapsed since arrival of the pest (e.g. Gehring et al., 2020). Nevertheless, local population abundance can also be influenced by physical factors such as climate conditions and biotic factors such as competition, availability of natural enemies and composition and configuration of the host plant habitat (Brown, 1984; Fagan et al., 2002; Morin et al., 2005; Robinet & Roques, 2010).…”

Section: Introductionmentioning

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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Chestnut tree damage evolution due to Dryocosmus kuriphilus attacks

Cited by 20 publications

References 50 publications

Impact of the Asian gall wasp Dryocosmus kuriphilus on the radial growth of the European chestnut Castanea sativa

Impact of the Asian gall wasp Dryocosmus kuriphilus on the radial growth of the European chestnut Castanea sativa

Climate as a possible driver of gall morphology in the chestnut pest Dryocosmus kuriphilus across Spanish invaded areas

Spatial propagation and patterns of abundance ofDryocosmus kuriphilusthroughout an invaded region

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