Peter Boyadzhiev

Peter Boyadzhiev
Plovdiv University · Department of Zoology

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69
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334
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Publications

Publications (69)
Article
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Background Mesopolobus Westwood, 1833 consists of about 135 valid species worldwide. After the fundamental monograph of Graham (1969), 12 species have been described from continental Europe and three species have been described from the Canary Islands and Malta. Amongst them, one species, Mesopolobus blascoi Askew, 1994, has been synonymised under...
Article
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During the period 2019-2020, parasitoids of invasive oak lace bug (Corythucha arcuata) were studied in Bulgaria. Biological material (larvae of C. arcuata) was collected from European oak (Quercus robur) or Austrian oak (Quercus cerris) in five localities of the country. Five eulophid specimens (Hymenoptera: Eulophidae) were reared from the host la...
Article
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The region of Gyumyurdzhinski Snezhnik in the Eastern Rhodopes is the closest in Bulgaria to the Aegean Sea. However, the climate is characterized by specific parameters that are determined by its relief. It is poorly protected from the invasion of cold air masses from the north. From the south, the Gyumyurdzhinski Snezhnik hill restrains the Medit...
Article
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The current study aims to characterize and compare the epigeal invertebrates communities along the urban-rural gradient at Maritsa River on the territory of the city of Plovdiv. The predominant tree and shrub vegetation in the three studied zones is typical riparian and mainly ruderal. With the greatest number of individuals and with the highest sp...
Article
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The published data on Eulophidae, Eupelmidae, Eurytomidae, Megastigmidae, Ormyridae, Pteromalidae and Torymidae families from territory of Sarnena Sredna Gora Mts were summarized. New records are also presented. A total of 15 eulophids (of them nine are new records to the region and one species – Neotrichoporoides biogradensis Graham, 1987 is new t...
Article
A new species of the genus Stepanovia Kostjukov (Hymenoptera, Eulophidae, Tetrastichinae), Stepanovia rosaeformis Boyadzhiev & Antov sp. nov., is described and illustrated. It was reared from galls of Diplolepis rosae (Linnaeus) (Cynipidae) on Rosa spp. (Rosaceae). A key to the species of Stepanovia associated with galls of Cynipidae is presented.
Article
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The rediscovery of the rare and endangered species Carabus (Hygrocarabus) variolosus is reported after its last record from 1909. The only known locality (Stara Planina Mts, Varshets Town) was confirmed. New records at similar habitats in the region could be expected in the future, based on extensive surveys with the proposed methods.
Article
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El gorgojo Sibinia subelliptica (Desbrochers, 1873) y un rico complejo de parasitoides calcidoides asociados se criaron a partir de inflorescencias de Dianthus giganteus d’Urv. (Caryophyllaceae) en Bulgaria. Se identificaron los siguientes taxones: Aprostocetus venustus (Gahan) y Baryscapus sp. cercana a garganus (Domenichini, 1958) (Eulophidae); E...
Article
Gall communities of the bedeguar gall wasp, Diplolepis rosae, have been explored by many authors during the years because of their species richness and relevance for biological and ecological studies. Some observations focused on the D. rosae larvae revealed the critical importance of hibernation for successful development of adult individuals. How...
Article
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Abstract: One way to assess the impacts of toxicants on populations of anurans is through developmental stability (DS) – the ability to buffer stresses during development stages. To assess the extent of possible perturbations in DS of frogs that inhabit a polluted industrial area east of Plovdiv city, Bulgaria, we applied analysis of fluctuating as...
Article
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We present unpublished data on the diet of three lizards (Lacerta trilineata, Lacerta agilis and Podarcis tauricus) from the Lacertidae family, collected in 1974 in few localities in Southern Bulgaria. The analyzed data showed that the insects (Insecta) are the most numerous and the most frequently met food component and among the non-insect compon...
Poster
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Gall communities of the Rose Bedeguar wasp, Diplolepis rosae (L.), were analyzed in 12 mountainous localities in Bulgaria. Most of the emerged species are common in rose bedeguar galls. Among the sampled localities D. rosae was represented with maximum of 5 % in one sample from Western Stara Planina Mts. Emerged material from six localities was fre...
Article
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Citation: Georgieva M., G. Georgiev, M. Matova, G. Zaemdzhikova, P. Mirchev, P. Boyadzhiev (2020) Egg parasitoid complex of the pine processionary moth (Thaumetopoea pityocampa) on the Thasos Island, Greece. Silva Balcanica, 21(2): 35-44. https://doi. Abstract The egg parasitoid complex of the pine processionary moth (Thaumetopoea pityocampa) was s...
Article
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Egg parasitoids of the pine processionary moth (Thaumetopoea pityocampa) were studied in the Eastern Rhodopes, Bulgaria. A total of 180 egg batches were collected on 16 August 2018 from a plantation of Pinus nigra in the region of Fotinovo Village. As a result, Eupelmus vladimiri (Hymenoptera: Eupelmi-dae) was recorded for the first time in trophic...
Article
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The weevil Larinus sibiricus Gyllenhal and a rich complex of associated hymenopteran parasitoids were reared from flower heads of Xeranthemum annuum L. (Asteraceae) in Bulgaria. As a result, the following taxa were established: Bracon urinator (Fabricius) (Braconidae), Exeristes roborator (Fabricius) (Ichneu-monidae), Cyrtoptyx sp., Norbanus cerasi...
Article
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Data about the feeding ecology of the green toad (Bufotes viridis complex) from two hills near the city of Plovdiv, Mladezhki Hill and Bunardzhik Hill, are presented. The diet of the green toad consists mainly of insects, predominantly Hymenoptera (mostly Formicidae) and Coleoptera. When comparing the quantitative composition of the trophic spectru...
Article
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In 2018, the parasitoid complex of Leucoptera sinuella (Reutti) (Lepidoptera: Lyonetiidae) was studied in two localities (town of Banya and Voinjagovo village) near Striama River in Central South Bulgaria. Larvae and pupae of L. sinuella were periodically collected in poplar (Populus spp.) plantations and studied in laboratory conditions. As a resu...
Article
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To investigate enemy pressure across the range of the pine processionary moth (Thaumetopoea pityocampa, Den. & Schiff.) as it spreads northwards in Europe because of climate change, a survey of 206 egg batches from historical and newly colonized areas at both the westernmost and the easternmost ends of the front was carried out in 2016–2018. Out of...
Article
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The objective of the current study was to assess the potential of semi-natural grasslands to serve as parasitoid sources from which individuals can spread to the surrounding cultivated habitats. The composition of chalcidoid fauna was studied in nine non-harvested grasslands located near to but not bordering oilseed rape ( Brassica napus L.) fields...
Article
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In the current study we review previously recorded data concerning two chalcidoid families-Eulophidae and Pteromalidae from the area of the Rhodope Mountains. Only one Pteromalidae species-Roptrocerus xylophagorum was recorded for the studied region. However, available sources show that the eulophids were extensively studied so far. Therefore, a ta...
Chapter
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The aim of the present work is to characterize and compare the epigeal invertebrates communities in three of the Plovdiv hills-"Mladezhki hulm" Hill, "Hulm Bunardzhik" Hill and "Danov hulm" Hill. The most numerous is the community of epigeal invertebrates from the "Mladezhki hulm" Hill (922 individuals from 37 taxa), followed by "Hulm Bunardzhik" H...
Chapter
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Urban green areas are of great importance for preserving biodiversity in cities. There is a wide variety of invertebrates in cities including a specific group that crawls on the surface of the earth called "epigeal" invertebrates. The current study aims to characterize and compare the epigeal invertebrates communities in three urban parks on the te...
Article
The lime leaf miner, Phyllonorycter issikii, is a moth species native to East Asia, which recently invaded considerable part of Europe. A study on the natural enemies of this invasive species was conducted in Bulgaria. Tilia cordata leaves infested with the lime leaf miner were collected in 2015 and 2016 in two public parks in Sofia. A total of ele...
Article
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Abstract: The species diversity and seasonal dynamics of the ichthyofauna in the lower course of the Sazliyka River, a left tributary of the Maritsa River, are presented. The stretch of the river from the village of Lyubenovo to the mouth was studied for a period of four years. The composition of the ichthyofauna of the river consisted of 21 fish s...
Article
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The seasonal and habitat variation of the trophic spectrum of Kotschy's gecko (Mediodactylus kotschyi rumelicus), as well as the species' trophic niche breadth was studied, based on feces analysis. The material was collected in spring and autumn of 2007 and 2008. The diet of M. kotschyi consists mainly of insects (59.51%), and from the non-insect f...
Article
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Stepanovia fructirosae sp. n. reared from galls of Diplolepis fructuum (Hymenoptera: Cynipidae) in NE Turkey, is described and illustrated. This species is morphologically similar to S. rosae Boyadzhiev & Todorov. An identification key to them is presented.
Article
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The article presents the basic erythrocyte-metric parameters: cell length (EL) and width (EW), EL/EW, erythrocyte size (ES), nucleus length (NL) and width (NW), NL/NW, nucleus size (NS) and nucleocytoplasmic ratio (NS/ES) in the wild populations of marsh frogs Pelophylax ridibundus from five water bodies in Southern Bulgaria (two rivers and three r...
Article
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The study was carried out in 2010-2015 at 6 sites in the Eastern Rhodopes: Madzharovo, Dam Ivailovgrad, Dupkata, Quarry, Liikanen and Meden Buk. A total of 424 Thaumetopoea solitaria egg clusters were collected from these sites and kept at room temperature. Out of a total of 52,628 eggs in the samples, 3 species of parasitoids of the genus Ooencyrt...
Article
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Egg structure and main characteristics of egg parasitism of pistachio processionary moth (Thaumetopoea solitaria) were studied in six sites in the Eastern Rhodopes in Bulgaria. The results showed that T. solitaria lays eggs on branches with a diameter of 3.6-13.0 mm and the productivity of female butterflies varies between 43 and 187 eggs. Three pa...
Article
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Thirty eight egg batches containing 8,514 eggs of Thaumetopoea pityocampa were collected on 21 September 2013 after hatching caterpillars from Pinus nigra trees in the region of Boracko jezero, Bosnia and Herzegovina. Collected batches were singled in test tubes, closed with cotton stoppers and stored under laboratory conditions at 20-22°C. The ave...
Article
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Baryscapus transversalis (Hymenoptera: Eulophidae) was established for first time as an egg hyperparasitoid of Thaumetopoea pityocampa (Lepidoptera: Notodontidae) in Bosnia and Herzegovina. It was reared from egg batches of pine processionary moth collected on Pinus nigra in the region of Boracko jezero. In laboratory conditions, 80 specimens of B....
Article
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Epidiaspis gennadii was found as a host of Zaomma lambinus in Bulgaria. The samples (parts of Pistacia terebinthus branches) were collected on 7 April 2014 in the region of Madzharovo in Eastern Rhodopes. In laboratory conditions, one female specimen of Z. lambinus was reared on 13 May 2014 from seven studied specimens of E. gennadii. The establish...
Article
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The present work was aimed at determining the population structure of silver Prussian carp (Carassius gibelio) populations that inhabit two anthropogenically polluted water basins from the region of the town of Galabovo (Southern Bulgaria) – the river Sazliyka (Population A) and the Rozov Kladenets reservoir (Population B). Total of 558 specimens f...
Article
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The present work studies the nature of the distribution of colour polymorphism and the sexual composition (among adult, sexually mature individuals involved in the breeding process) in populations of marsh frog (Pelophylax ridibundus) inhabiting different biotopes along one of the ecologically damaged rivers in Bulgaria (the river Sazliyka) and two...
Article
The purpose of this work is to present the results of a study on the values of the integral indicator for developmental stability Fluctuating Asymmetry (FA) in the populations of gibel carp Carassius gibelio that live in two anthropogenically polluted water basins in South Bulgaria: the Sazliyka River and “Rozov Kladenets” Dam Lake. The study was c...
Article
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This study presents data on 78 chalcidoid species found in Vitosha Mountain, Bulgaria. All of them, 4 species of the family Eulophidae and 74 species of the family Pteromalidae, are recorded for the first time for the fauna of Bulgaria. Localities in Bulgaria are the most southerly recorded for 2 eulophid species and 9 pteromalid species. One speci...
Article
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During the period 2010-2012, egg parasitoids of pistachio processionary moth {Thaumetopoea solitaria) were studied in Bulgaria. A total of 215 egg clusters containing 26 453 eggs were collected on Pistacia terebinthus in 4 sample plots at 3 sites in the Eastern Rhodopes. Directly after collection, egg clusters with part of branches, about 5 cm long...
Article
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This work presents data on the occurrence of colour polymorphism, sex ratio and age structure (among adult individuals actually involved in the breeding process) in populations of two tailless amphibian species – Pelophylax ridibundus and Pseudepidalea viridis inhabiting anthropogenically polluted biotopes in Southern Bulgaria. The habitats are adj...
Article
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A new distinctive species of the genus Stepanovia Kostjukov (Hymenoptera: eulophidae: Tetrastichinae), Stepanovia rosae Boyadzhiev & Todorov, sp. n. is described and illustrated. The new species was reared from galls of Diplolepis rosae (linnaeus) (Cynipidae) on Rosa dumalis Bechstein, R. agrestis (savi), R. micrantha smith and R. canina linnaeus (...
Article
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The seasonal variation of the trophic spectrum of two sympatric lizards (Lacerta viridis and Podarcis tauricus) is presented as well as the species’ trophic niche breadth and niche overlap. The material for the current study was collected in 1980-1981 in surroundings of Purvomay Town in South Bulgaria. The main food sources for both lizards are ins...
Data
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The seasonal variation of the trophic spectrum of two sympatric lizards (Lacerta viridis and Podarcis tauricus) is presented as well as the species' trophic niche breadth and niche overlap. The material for the current study was collected in 1980-1981 in surroundings of Purvomay Town in South Bulgaria. The main food sources for both lizards are ins...
Article
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In Bulgaria, near Ivaylovgrad, the Eastern Rhodopes, in a forest of Pinus nigra Arn. 85 egg batches were sampled over three generations (2009, 2010 and 2011 - time of deposit of eggs) of Thaumetopoea pityocampa (Den. & Schiff.) (Lep., Thaumetopoeidae). Directly after collection the batches were singled in test tubes, closed with cotton stoppers and...
Article
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Rose Bedeguar galls support insect community, which consists of hymenopteran parasitoids and inquilines. Although, the structure and phenology of this community, as well as the life history and sex ratio of the gall inducer are subject of detailed investigations in some European countries, such studies have never been conducted in Bulgaria. In this...
Article
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Habrolepis montenegrina and Epidiaspis gennadii are new species for Bulgarian fauna, and E. gennadii is the first known host of the parasitoid. In laboratory conditions, 3 female parasitoid specimens were reared from 8 host specimens collected in March 2010 on Pistacia terebinthus near the town of Ivaylovgrad in Eastern Rhodopes.
Article
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A modified and improved model of a mechanical manipulator for observation of pinned and mounted insects is described. This device allows movement of the observed object around three perpendicular axes in the field of vision at all magnifications of stereomicroscopes. The main improvement of this new model is positioning of the guiding knobs for rot...
Article
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During the period 1995-2010, Pediobius bruchicida (RONDANI) (Hymenoptera: Eulophidae) was established for first time as an egg parasitoid of Thaumetopoea pityocampa (DENIS & SCHIFFERMOLLER) (Lepidoptera: Notodontidae) in Bulgaria. It was reared from egg batches of pine processionary moth collected in Pinus nigra Am, plantations in four sites of Bul...
Article
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Two species Diglyphus begini Ashmead and D. sabulosus Erdös are new records for Turkey; one new species is described Diglyphus sensilis sp. nov., three species have new host record Liriomyza sativae and Chromatomyia horticola; 10 species of Diglyphus from Turkey are keyed.
Article
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This study was carried out to determine Eulophidae species, they have economical important for biological control, collected in various habitats in 2000 and between 2006-2008 in some provinces of Turkey. Specimens were collected with swepping net and reared materials especially on Agromyzidae leafminer species (Diptera: Agromyzidae). By identifying...
Article
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MOLLOV, I., P. BOYADZHIEV and A. DONEV, 2010. Trophic role of the Marsh frog Pelophylax ridibundus (Pallas, 1771) (Amphibia, Anura) in the aquatic ecosystems. Bulg. J. Agric. Sci., 16: 298-306 During our study we identified 1356 prey items, divided in 64 prey categories in the trophic spectrum of Pelophylax ridibundus from the surrounding of Skutar...
Article
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The male of Neotrichoporoides bulgaricus is described from two males collected in the type area. A diagnosis and a redescription of female holotype of the poorly known species are given.
Article
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During our study we identified 500 prey items in 20 prey categories in the trophic spectrum of Bufo bufo with average number of prey items per stomach 25.00. The most important prey taxon is Formicidae (70.20%), followed by Coleoptera (especially Carabidae – 11.40%), as well as non-insect invertebrates (Isopoda, Gastropoda, Arachnida) which also pl...
Article
The recent discovery of a brachypterous female of Entedonomphale carbonaria (Erdös) (Hymenoptera: Eulophidae: Entedoninae) in Bulgaria is being reported. It made possible to make a positive conclusion about its conspecificity with the North American species E. kaulbarsi (Yoshimoto), which has a brachypterous female identical to the brachypterous fe...
Article
A new distinctive species of the genus Entedonomphale Girault (Hymenoptera: Eulophidae: Entedoninae), E. bulgarica Boyadzhiev & Triapitsyn sp. n., is described from the mountains of Southwestern and southeastern Bulgaria. The European species E. carbonaria (Erdos) is newly recorded from the Nearctic region (USA). An identification key to both sexes...
Article
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Is made. A synopsis of the studies on the trophic spectrum of the Bulgarian batrachofauna. The analysis of the Bulgarian herpetological literature showed that so far 16 specialized studies on the diet of the Bulgarian species of am-phibians have been conducted. From all 18 amphibian species that occur in Bulgaria, 11 (61.11 %) were studied concerni...
Article
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Seven xylophagous insect species were established in stems and branches of Salix caprea L. during the period 1998–2003 in Bulgaria: Agrilus lineola lineola Redtenbacher (Coleoptera: Buprestidae), Aromia moschata (Linnaeus), Oberea oculata (Linnaeus), Saperda populnea (Linnaeus), Saperda similis Laicharting (Coleoptera: Cerambycidae), Synanthedon fo...
Article
Puklina asphodelinae sp. n., reared from seed capsules of Asphodeline lutea in the Besapari hills, Bulgaria, is described and illustrated.
Article
The parasitoid complex of Paraphytomyza populi (Kltb.) (Diptera: Agromyzidae) was studied in Sofia, Bulgaria in 1997. Poplar leaves with P. populi larvae and pupae were collected from poplar stump shoots and examined in a laboratory. As a result, eleven parasitoid species were established: Chorebus albipes (Haliday) (Hymenoptera, Braconidae), Pedio...
Article
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The parasitoid complex of Paraphytomyza populi (Kltb.) (Diptera: Agromyzidae) was studied in Sofia, Bulgaria in 1997. Poplar leaves with P. populi larvae and pupae were collected from poplar stump shoots and examined in a laboratory. As a result, eleven parasitoid species were established: Chorebus albipes (Haliday) (Hymenoptera, Braconidae), Ped-i...
Article
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A new species for the fauna of Bulgaria and the Balkans, Pnigalio nemati (Westwood) (Hymenoptera: Eulophidae) was recorded as a parasitoid of Pontania proxima (Lepeletier) and Pontania viminalis (L.) (Hymenoptera: Tenthredinidae). It was found on Salix fragilis L. and Salix alba L. in 1997 in the vicinities of Sofia. P. nemati was a gregarious larv...
Article
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Cerambycid fauna (Coleoptera: Cerambycidae) of Eastern Rhodopes was studied in 2001 and 2002. As a result, twenty-two species from three subfamilies were found: 10 from Lepturinae, 5 from Cerambycinae and 7 from Lamiinae. Opsilia molybdaena (Dalman) is a new species for Bulgarian fauna. Fifteen longhorn beetles are new records for Eastern Rhodopes,...
Article
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During studies of material reared from seed capsules of Asphodeline lutea collected in Kaliakra Cape had been established that seedeater Eurytoma sp. (rosae group) (Hymenoptera: Eurytomidae) is a host of Puklina asphodelinae (Hymenoptera: Eulophidae). P. asphodelinae is gregarious ectoparasitoid and its larval, pupal and imagimal morphology are pre...

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