Novel insight in the life cycle of Torymus sinensis, biocontrol agent of the chestnut gall wasp

Ferracini, Chiara; Gonella, Elena; Ferrari, Ester; Saladini, Matteo Alessandro; Picciau, Luca; Tota, F.; Pontini, Marianna; Alma, Alberto

doi:10.1007/s10526-014-9633-4

Cited by 34 publications

(33 citation statements)

References 23 publications

(27 reference statements)

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“…), has been accidentally introduced from native China to several countries in Asia, North America and Europe (EFSA 2010;CABI 2016) causing substantial damage to chestnuts. Parasitoid Torymus sinensis Kamijo (Hymenoptera, Torymidae) has successfully been used as a biological control agent against D. kuriphilus, and extensive classical biological control programmes have been implemented in Japan, USA, Italy, France, Slovenia, Croatia and Hungary (Moriya et al 2003;Cooper and Rieske 2011;Borowiec et al 2014;Mato sevi c et al 2014Mato sevi c et al , 2015Ferracini et al 2015). Torymus sinensis is native to China, phenologically well synchronized with its host, it is highly specific, and after release, it expands its population and lowers the outbreak levels of its host (Quacchia et al 2008;Mato sevi c et al 2014;Colombari and Battisti 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Adults emerge from withered D. kuriphilus galls in spring simultaneously with the opening of chestnut buds and females lay eggs into newly formed galls. After feeding externally on its host, larvae overwinter in galls and pupate in late winter before emerging in spring (Quacchia et al 2008;Ferracini et al 2015). Torymus sinensis has shown high dispersal ability, spreading over short distance by active flight and over long distance aided by wind, being able to cover more than 70 km in only a few days (Colombari and Battisti 2015).…”

Section: Introductionmentioning

confidence: 99%

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Success of classical biocontrol agent Torymus sinensis within its expanding range in Europe

Matošević

Lacković

Kos

et al. 2017

J Applied Entomology

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Torymus sinensis Kamijo (Hymenoptera, Torymidae), a classical biocontrol agent of chestnut gall wasp Dryocosmus kuriphilus (Hymenoptera, Cynipidae), was released in Croatia, Slovenia and Hungary in 2015. Following the introduction, the research of parasitism rates and population genetic indices on 40 different sites was performed to monitor and evaluate the success of establishment. The observed parasitism rates were unexpectedly high and negatively correlated with the distance from westernmost locality, while population genetic indices showed that populations of T. sinensis did not suffer from bottleneck-induced founder effect phenomenon. Moreover, lack of genetic differentiation demonstrates that all populations share similar genetic structure, which could be shaped only by high levels of gene flow. We conclude that T. sinensis established viable and genetically diverse populations and successfully spread naturally from Italy across Slovenia to Croatia and Hungary.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Success of classical biocontrol agent Torymus sinensis within its expanding range in Europe

Matošević

Lacković

Kos

et al. 2017

J Applied Entomology

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“…Moreover, we recorded that a small number of T. sinensis does not overwinter but emerges after 3-4 months. Ferracini et al (2015a) demonstrated the presence of extended diapause for some individuals. Taken together, these results speak for a diversified bet hedging which could lower the risk of local mismatch with its host's biological cycle.…”

Section: Discussionmentioning

confidence: 98%

Early population dynamics in classical biological control: establishment of the exotic parasitoid Torymus sinensis and control of its target pest, the chestnut gall wasp Dryocosmus kuriphilus, in France

Borowiec

Thaon

Brancaccio

et al. 2018

Entomologia Exp Applicata

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In response to the introduction and spread of the chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) in metropolitan France, including Corsica, the exotic parasitoid Torymus sinensis Kamijo (Hymenoptera: Torymidae) was deliberately introduced in more than 50 locations covering most of the areas of chestnut production. To test the impact of propagule pressure (i.e., the number and size of introductions) on establishment success and post‐release dynamics, the introductions were done according to three experimental modalities: (1) a single introduction of 100 females, (2) two sequential introductions of 50 females, or (3) a single introduction of 1 000 females. Post‐release surveys demonstrated a very high local establishment of T. sinensis, regardless of the introduction modality. Post‐introduction dynamics were found to follow a two‐phase process. First, early dynamics were characterized by an exponential growth of T. sinensis populations without a significant decrease in D. kuriphilus populations. Later, middle‐term dynamics indicated a global decrease in both D. kuriphilus and T. sinensis populations. Quite surprisingly, propagule pressure had a limited effect on post‐introduction dynamics, with a lasting demographic advantage for the largest introductions, but no influence of the number of introductions. Finally, site connectivity had a positive effect on T. sinensis population size, suggesting successful colonization and establishment at a wide spatial scale beyond the introduction sites. In addition, we observed that some T. sinensis exhibited a very short developmental time compared to the majority of the emerged individuals, which may be interpreted as a diversified bet hedging strategy against environmental stochasticity. These findings confirm the strong potential of T. sinensis for successful establishment and sustainable control of the chestnut gall wasp in Europe.

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“…D. kuriphilus is regarded as a serious threat to chestnuts, especially to fruit production [4] and crown leaf area loss [5]. Parasitoid Torymus sinensis Kamijo [Hymenoptera; Torymidae] has successfully been used as a classical biological control agent against D. kuriphilus and it has been released in biocontrol campaigns in Japan, the USA, Italy, France, Slovenia, Croatia and Hungary [6,7,8,9,10,11]. Torymus sinensis is native to China, phenologically well synchronised with D. kuriphilus, it is highly specific, and lowers the outbreak levels of its host [9,12,13].…”

Section: Introductionmentioning

confidence: 99%

First Record of Biocontrol Agent Torymus sinensis (Hymenoptera; Torymidae) in Bosnia and Herzegovina

Matošević

Mujezinović

Dautbašić

2017

SEEFOR

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Novel insight in the life cycle of Torymus sinensis, biocontrol agent of the chestnut gall wasp

Cited by 34 publications

References 23 publications

Success of classical biocontrol agent Torymus sinensis within its expanding range in Europe

Success of classical biocontrol agent Torymus sinensis within its expanding range in Europe

Early population dynamics in classical biological control: establishment of the exotic parasitoid Torymus sinensis and control of its target pest, the chestnut gall wasp Dryocosmus kuriphilus, in France

First Record of Biocontrol Agent Torymus sinensis (Hymenoptera; Torymidae) in Bosnia and Herzegovina

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