scholarly journals Ecology and biological control of the chestnut gall-wasp, Dryocosmus kuriphilus Yasumatu (Hymenoptera:Cynipidae). 3 Field distribution pattern of the chestnut gall-wasp and parasites.

1986 ◽  
Vol 32 ◽  
pp. 211-213
Author(s):  
Yutaka GYOUTOKU ◽  
Michio UEMURA
Keyword(s):  
Biological Control ◽  
Distribution Pattern ◽  
Field Distribution ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus

scholarly journals Genotypic Characterization of Torymus sinensis (Hymenoptera: Torymidae) After Its Introduction in Tuscany (Italy) for the Biological Control of Dryocosmus kuriphilus (Hymenoptera: Cynipidae)

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Ambra Viviani ◽  
Rodolfo Bernardi ◽  
Andrea Cavallini ◽  
Elisabetta Rossi
Keyword(s):  
Biological Control ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Its2 Region ◽  
Rrna Gene ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Torymus Sinensis ◽  
The World

Abstract Torymus sinensis Kamijo (Hymenoptera: Torymidae) is an alien parasitoid that is used in many areas of the world for biological control the Asian chestnut gall wasp, Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae). In Italy, this parasitoid was imported from Japan in 2003 and subsequently multiplied and released throughout the country. In this study, a phylogenetic investigation was carried out on insects from three different sites in northern Tuscany (Italy). Moreover, the possible hybridization between T. sinensis and some native Torymus species was evaluated. The conserved region 18S rRNA gene and the hypervariable ITS2 (Internal Transcribed Spacer 2) region of the ribosomal cistrone were selected as molecular markers. Sequencing the amplified products, after cloning, ruled out any hybridization between T. sinensis and the native Torymus species, and also confirmed the presence of two haplotypes for the Tuscan population of T. sinensis both for the region of the 18S rRNA gene as well as for the ITS2 region. These results confirm that the environmental impact of the alien parasitoid T. sinensis in the study site is acceptable, although an extensive and repeated monitoring would be desirable.

scholarly journals Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Tiziana Panzavolta ◽  
Francesco Croci ◽  
Matteo Bracalini ◽  
George Melika ◽  
Stefano Benedettelli ◽  
...  
Keyword(s):  
Biological Control ◽  
Population Dynamics ◽  
Pest Control ◽  
Climatic Conditions ◽  
Strong Fluctuation ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Native Parasitoids ◽  
Parasitism Rates ◽  
Indigenous Parasitoids

Native parasitoids may play an important role in biological control. They may either support or hinder the effectiveness of introduced nonnative parasitoids released for pest control purposes. Results of a three-year survey (2011–2013) of the Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) populations and on parasitism rates by native indigenous parasitoids (a complex of chalcidoid hymenopterans) in Italian chestnut forests are given. Changes in D. kuriphilus gall size and phenology were observed through the three years of study. A total of 13 species of native parasitoids were recorded, accounting for fluctuating parasitism rates. This variability in parasitism rates over the three years was mainly due to the effect of Torymus flavipes (Walker) (Hymenoptera: Torymidae), which in 2011 accounted for 75% of all parasitoid specimens yet decreased drastically in the following years. This strong fluctuation may be related to climatic conditions. Besides, our data verified that parasitoids do not choose host galls based on their size, though when they do parasitize smaller ones, they exploit them better. Consequently, ACGWs have higher chances of surviving parasitism if they are inside larger galls.

Rearing, release and settlement prospect in Italy of Torymus sinensis, the biological control agent of the chestnut gall wasp Dryocosmus kuriphilus

BioControl ◽  
2007 ◽  
Vol 53 (6) ◽  
pp. 829-839 ◽  
Author(s):  
Ambra Quacchia ◽  
Seiichi Moriya ◽  
Giovanni Bosio ◽  
Ivano Scapin ◽  
Alberto Alma
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Control Agent ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Torymus Sinensis

scholarly journals Biological control of sweet chestnut on Pécsbánya, Hungary

2018 ◽  
pp. 77-81
Author(s):  
Gabriella Kovács ◽  
Dominika Bodnár ◽  
Gábor Tarcali ◽  
László Radócz
Keyword(s):  
Biological Control ◽  
Biological Process ◽  
Cryphonectria Parasitica ◽  
Plant Health ◽  
Chestnut Blight ◽  
Gall Wasp ◽  
Sweet Chestnut ◽  
Dryocosmus Kuriphilus ◽  
Hypovirulent Strain ◽  
Blight Disease

The supervision of plant hygiene of sweet chestnut grove on Pécsbánya (South Hungary) started more than four years ago. Hypovirulent strains were applied as a biological process to control Cryphonectria parasitica fungus which causes the chestnut blight disease. By now the performed interventions have shown obvious results, the vitality of the trees has greatly improved, the amount of harvested nuts is increasing, and the hypovirulent strain has been spreading within the area. During plant health inspection the galls of chestnut gall wasp (Dryocosmus kuriphilus) was found in the year of 2015, which is the obvious symptom of new occurrence of the pest. The pest was eradicated by destroy galls, which allows taking out of consideration the damage by now in this area.

scholarly journals The open bar is closed: restructuration of a native parasitoid community following successful control of an invasive pest

2019 ◽  
Author(s):  
David Muru ◽  
Nicolas Borowiec ◽  
Marcel Thaon ◽  
Nicolas Ris ◽  
Madalina I. Viciriuc ◽  
...  
Keyword(s):  
Biological Control ◽  
Habitat Type ◽  
Invasive Pest ◽  
Parasitoid Species ◽  
Native Community ◽  
Natural Habitats ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Native Parasitoids ◽  
Torymus Sinensis

AbstractThe rise of the Asian chestnut gall wasp Dryocosmus kuriphilus in France has benefited the native community of parasitoids originally associated with oak gall wasps by becoming an additional trophic subsidy and therefore perturbing population dynamics of local parasitoids. However, the successful biological control of this pest has then led to significant decreases in its population densities. Here we investigate how the invasion of the Asian chestnut gall wasp Dryocosmus kuriphilus in France and its subsequent control by the exotic parasitoid Torymus sinensis has impacted the local community of native parasitoids.We explored 5 years of native community dynamics within 26 locations during the rise and fall of the invasive pest. In an attempt to understand how mechanisms such as local extinction or competition come into play, we analyzed how the patterns of co-occurrence between the different native parasitoid species changed through time.Our results demonstrate that native parasitoid communities experienced increased competition as the D. kuriphilus levels of infestation decreased. During the last year of the survey, two alternative patterns were observed depending on the sampled location: either native parasitoid communities were represented by an extremely limited number of species occurring at low densities, in some cases no native parasitoid species at all, or they were dominated by one main parasitoid: Mesopolobus sericeus. These two patterns seemed to correlate with the habitat type, M. sericeus being more abundant in semi-natural habitats compared to agricultural lands, the former known to be natural reservoirs for native parasitoids. These results highlight how the “boom-and-bust” dynamics of an invasive pest followed by successful biological control can deeply alter the structure of native communities of natural enemies.This article has been peer-reviewed and recommended by Peer Community in Zoologyhttps://doi.org/10.24072/pci.zool.100004

The Asian chestnut gall wasp Dryocosmus kuriphilus: a global invader and a successful case of classical biological control

2018 ◽  
Vol 92 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Dimitrios N. Avtzis ◽  
George Melika ◽  
Dinka Matošević ◽  
David R. Coyle
Keyword(s):  
Biological Control ◽  
Classical Biological Control ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Successful Case

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

2021 ◽  
Author(s):  
Enrico Marcolin ◽  
Mario Pividori ◽  
Fernanda Colombari ◽  
Maria Chiara Manetti ◽  
Francesco Pelleri ◽  
...  
Keyword(s):  
Radial Growth ◽  
Castanea Sativa ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
European Chestnut
Sign in / Sign up

Export Citation Format

Share Document