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Buffington M.L.,Smithsonian Institution | Melika G.,Plant Health and Molecular Biology Laboratory | Davis M.,University of Massachusetts Amherst | Elkinton J.S.,University of Massachusetts Amherst
Proceedings of the Entomological Society of Washington | Year: 2016

Many species of gall wasp (Cynipidae) essentially co-exist with their host oak tree species. Occasionally, the association becomes destructive to the tree, as is the case with Zapatella davisae, new species. This species is a twig galler, and as such, in the cases of heavy infestation, cause flagging, leaf clumping, and dieback of branches and twigs. Historical records of other species of Zapatella suggest that members of this genus have a checkered record with respect to damaging their host plants in North America, and these data are summarized here.

Szocs L.,NARIC Forest Research Institute | George M.,Plant Health and Molecular Biology Laboratory | Thuroczy C.,Malomarok str. 27 | Csoka G.,NARIC Forest Research Institute
Periodicum Biologorum | Year: 2016

Background and Purpose: Despite the importance of studying the native enemy complex of the introduced and invasive leaf miner sawfly species in their native territories, few studies have been done in recent years concerning the species component and the regulating potential of their parasitoid complexes (in both native and invaded area). Heterarthrus vagans and Fenusa dohrnii are only some of the species which are native in Palearctic area, but alien invasive in North America, causing damage on forest plantations. In this short paper we provide our original data to the knowledge of parasitoid fauna associated with seven leaf mining sawflies native in Hungary. Material and Methods: For a period of four years (2011–2014), several leaf miner species were collected and placed in single mine rearings. From the leafminers, belonging to the Tenthredinidae family, a total of 809 mines made by 9 different species (Heterarthrus wuestneii, Fenusa dohrnii, Heterarthrus vagans, Fenusa pumila, Fenusella nana, Profenusa pygmaea, Metallus pumilus, Parna apicalis, Fenusa ulmi) were collected from 19 locations across Hungary. Results and Conclusions: A total of 188 specimens of 13 parasitoid species belonging to 3 families (Braconidae – 1; Ichneumonidae – 1 and Eulophidae – 11) were reared out from our samples. Parasitoid adults were obtained from 7 of the 9 species of leaf mining sawfly hosts (Fenusa dohrnii, Fenusa pumila, Fenusa ulmi, Heterarthrus vagans, Metallus pumilus, Parna apicalis, Profenusa pygmaea). From Heterarthrus wuestneii and Fenusella nana no parasitoid adults emerged.The parasitoid species presented in this work are typically associated with leaf mining sawflies. Several new host-parasitoid associations have been described. © 2015, Croatian Society of Natural Sciences. All rights reserved.

Szocs L.,Forest Research Institute | Melika G.,Plant Health and Molecular Biology Laboratory | Thuroczy C.,Malomarok u. 27 | Csoka G.,Forest Research Institute
Acta Silvatica et Lignaria Hungarica | Year: 2015

Between 2011 and 2014, 1,154 mines of Phyllonorycter comparella (Duponchel) were collected at 12 locations in Hungary and were put into single-mine rearing containers. A total of 574 parasitoid specimens belonging to 29 parasitoid species (26 Chalcididae, 2 Encyrtidae and 1 Braconidae) emerged. Of these species, 13 have not yet been mentioned in either international or in Hungarian literature as a parasitoid of the P. comparella. The species assemblages of the parasitoid complexes varied greatly among the sample sites. The primary dominant species of the total samples was found to be Sympiesis sericeicornis (Nees), an abundant idiobiont solitary ectoparasitoid. Among the species reared, we have found specialist parasitoids such as Achrysocharoides scaposa (Erdos) and even species never recorded from Populus (Zagrammosoma variegatum (Masi)) according to the Universal Chalcidoidea Database.

Pujade-Villar J.,University of Barcelona | Cibrian-Tovar D.,National Autonomous University of Mexico | Barrera-Ruiz U.M.,National Autonomous University of Mexico | Melika G.,Plant Health and Molecular Biology Laboratory
Southwestern Entomologist | Year: 2014

A new species of oak gall wasp, Andricus breviramuli Pujade-Villar n. sp., is described from Mexico. The species is known only from asexual females. Data on the diagnosis, distribution, and biology of the new species are given. The wasp induces galls on twigs and young shoots of Quercus laeta Liebm. This gall wasp seems to be a serious pest of Q. laeta in Santa Fe (Delegación Cuajimalpa, DF), México City.

Matosevic D.,Croatian Forest Research Institute | Melika G.,Plant Health and Molecular Biology Laboratory
Bulletin of Insectology | Year: 2013

Research on recruitment of native parasitoids on the recently introduced invasive species Dryocosmus kuriphilus has been carried out on four sites in 2011 and 2012 in Croatia. In total 15 species of native parasitoids were reared which belong to 5 of 6 chalcid families attacking native oak cynipid gallwasps (Eupelmidae - 2, Eurytomidae - 4, Ormyridae - 1, Pteromalidae - 4 and Torymidae - 4 species). This research has shown that the time lag between introduction of new host and recruitment of native parasitoids is short. Sex ratios for the most abundant parasitoid species appeared to be female-biased and the parasitoid emergence rate for all sites was relatively low. Torymus flavipes was recorded from D. kuriphilus at all sites and in both years and was the most abundant species exploiting the new host. Among other species, especially T. flavipes and Megastigmus dorsalis, which have been reared from D. kuriphilus galls, could provide a good possibility for biological control but further research is needed.

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