Influence of the introduced parasitoid Torymus sinensis (Hymenoptera: Torymidae) on T. koreanus and T. beneficus as indigenous parasitoids of the chestnut gall wasp Dryocosmus kuriphilus (Hymenoptera: Cynipidae) on chestnut trees in Nagano Prefecture, Japan

Yara, Kaori; Matsuo, Kazunori; Sasawaki, Terunori; Shimoda, Takeshi; Moriya, Seiichi

doi:10.1007/s13355-011-0088-0

Cited by 9 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The complicated natural history of T. sinensis and T. beneficus in Japan involving displacement, hybridisation (summarized in Yara et al ., 2012) and uncertain taxonomy (Yara, 2004) is relevant for determining what exactly was introduced into Europe. The most puzzling aspect is the presence of two strains of T. beneficus that differ by emergence period and that can hybridise with T. sinensis .…”

Section: Discussionmentioning

confidence: 99%

“…This indicates that T. beneficus TbL might be a distinct strain of T. sinensis with shorter ovipositor and unknown origin. Since it is less prolific and less efficient (Piao & Moriya, 1992; Yara et al ., 2012), it was displaced by the T. sinensis introduced for biocontrol purposes.…”

Section: Discussionmentioning

confidence: 99%

“…Additional evidence that T. beneficus TbL is the same as T. sinensis is its ability to hybridise much easier with T. sinensis compared with T. beneficus TbE (Yara et al ., 2010, 2012). T. beneficus TbL and T. sinensis are interfertile including backcrosses while crosses involving T. beneficus TbE as one parent and either T. beneficus TbL or T. sinensis as the other produced very few hybrid females, if at all, except when T. sinensis was the father (Moriya et al ., 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Individual T. beneficus TbE certainly can emerge later in the season, as happens in rearings of numerous other chalcid wasp species, but this became obvious only after the use of molecular markers (Yara et al ., 2012). It could explain why Yara et al .…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Contribution of integrative taxonomy to tracking interspecific hybridisations between the biological control agent Torymus sinensis and its related taxa

Viciriuc

Thaon

Moriya³

et al. 2021

Systematic Entomology

Self Cite

View full text Add to dashboard Cite

Native to China, the chestnut gall wasps Dryocosmus kuriphilus Yasumatsu (Hymenoptera, Cynipidae) has invaded several countries on three continents in about half a century. To reduce the negative impact on the chestnut industry, the hymenopteran parasitoid Torymus sinensis Kamijo (Hymenoptera, Torymidae) was firstly translocated from China to Japan and then from Japan to other countries. From an agronomic point of view, this classical biological control programme is perceived as a great success story even if in Japan it was overshadowed by evidence of hybridisation with the indigenous species Torymus beneficus Yasumatsu & Kamijo. Based on numerous specimens collected in France and Italy but also in Asia, as well as on published data, we detected molecular and phenotypic signatures of a possible hybridisation. Our results evidenced for the first time that the European stock of T. sinensis has some rare molecular signatures of historical hybridisation that took place in Japan (0.66% of the mitochondrial haplotypes). Our morphometric study also shows that European and Japanese T. sinensis are morphologically intermediate between the two species that hybridised. The identity of the early‐ and late‐season strains of T. beneficus is discussed. Torymus beneficus late‐season strain (TbL) is considered to be the same as T. sinensis and only the early‐season strain (TbE) is the true T. beneficus. Torymus beneficus is morphologically very close to T. sinensis, and the interspecific distance of COI, though large, is comparable with the larger intraspecific variability found in other Chalcidoidea species. Though the two could be regarded as subspecies, for the stability of nomenclature it is better to continue treating them as distinct species.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Contribution of integrative taxonomy to tracking interspecific hybridisations between the biological control agent Torymus sinensis and its related taxa

Viciriuc

Thaon

Moriya³

et al. 2021

Systematic Entomology

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the Asian area of origin, T. sinensis is considered a host-specific parasitoid, and although occasional feeding on European native oak-cynipid gall-inducers has been recorded in Italy (Ferracini et al, 2015(Ferracini et al, , 2017, the direct impact on non-target species is considered low. Indirectly, however, T. sinensis has been observed replacing indigenous parasitoids of D. kuriphilus (Yara et al, 2012), something that needs to be accurately quantified in the next years.…”

Section: Introductionmentioning

confidence: 99%

No loss of genetic divergence in Torymus sinensis following its release for Dryocosmus kuriphilus control in Europe

Avtzis¹,

Eleftheriadou²,

Matošević

et al. 2023

Agri and Forest Entomology

View full text Add to dashboard Cite

Arrival, establishment, and further dispersal of non‐native natural enemies are considered essential for a successful biological control programme, while among the factors that may determine the success of such a programme, genetic diversity of the introduced population plays an important role in the establishment of a non‐native species. The Chinese parasitoid wasp Torymus sinensis Kamijo (Hymenoptera: Torymidae) was initially released in Europe in Italy to control biologically the Asian chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae), and reduce the damage induced on sweet chestnut (Castanea sativa Miller). In the following years, T. sinensis was then released in numerous other European countries as a biological control agent of D. kuriphilus. Its presence has also been reported beyond the countries of release due to rapid natural dispersal. To assess the post‐release genetic diversity of D. kuriphilus, we screened T. sinensis populations from six European countries and tested the possibility of these populations suffering from frequently observed genetic effects that could threaten its successful establishment in Europe. Our results exhibit that T. sinensis populations have suffered neither from the Allee effect nor from genetic bottleneck after their release and establishment in Europe, something that increases the possibility to effectively control D. kuriphilus in Europe.

show abstract

Effects of environmental parameters on the chestnut gall wasp and its complex of indigenous parasitoids

Bonsignore

Bernardo

2018

Sci Nat

View full text Add to dashboard Cite

The chestnut gall wasp (CGW), Dryocosmus kuriphilus, an invasive pest native to China, has caused severe yield and economic losses to chestnut production in Europe since its arrival in 2002. In Southern Italy, the complex of indigenous parasitoids colonizing CGW was monitored between 2013 and 2015, with the aim of estimating the composition of the indigenous parasitoid complex, its ability to control CGW populations, and the interactions of both factors with several measured environmental parameters. We compared results among three differently managed field types. Results showed an increase in the rate of parasitism both when the host population density was lower and in unmanaged chestnut stands with more natural conditions. The percentage of parasitism in galls was related to morphological traits of the galls and to higher seasonal temperatures, which reduced the parasitism intensity because CGW develops earlier under such conditions. The host-parasitoid mortality inside galls varied among sites and was associated mostly with rot fungi during wet spring and summer months. Parasitoid species richness was similar among the study sites, but the proportion of parasitoid species differed between orchards and unmanaged coppice stands. The timing of attack by parasitoids followed a species-specific successional sequence throughout the larva-to-adult life cycle of the CGW. These interactions should be considered in future research on trophic relationships and when modeling invasive scenarios for new pest species.

show abstract

Influence of the introduced parasitoid Torymus sinensis (Hymenoptera: Torymidae) on T. koreanus and T. beneficus as indigenous parasitoids of the chestnut gall wasp Dryocosmus kuriphilus (Hymenoptera: Cynipidae) on chestnut trees in Nagano Prefecture, Japan

Cited by 9 publications

References 16 publications

Contribution of integrative taxonomy to tracking interspecific hybridisations between the biological control agent Torymus sinensis and its related taxa

Contribution of integrative taxonomy to tracking interspecific hybridisations between the biological control agent Torymus sinensis and its related taxa

No loss of genetic divergence in Torymus sinensis following its release for Dryocosmus kuriphilus control in Europe

Effects of environmental parameters on the chestnut gall wasp and its complex of indigenous parasitoids

Contact Info

Product

Resources

About