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June 1999 - present
Publications
Publications (98)
Citizen science plays an important role in the early detection of invasive alien species (IAS). The involvement of young people in initiatives related to citizen science in Bulgaria could contribute to better monitoring of IAS because of mobility and digital skills of those people. Based on a questionnaire survey, key aspects of involvement of youn...
Advances in information technology developments have led to improved ways and means of sharing information and good practices in various areas of social development. Providing the necessary tools enables Citizen Sciences (CS) to play an important role in raising awareness and engaging various stakeholders in the prevention of invasive alien species...
The present pilot study tested and validated the use of the 'Invasive Alien Species in Eu-rope' smartphone app (IASapp) in the Lower Danube Region. The study was conducted in three stages: (1) Testing the effectiveness of the app in Bulgaria, Romania and Serbia by organizing information and field testing campaigns; (2) Improving and extending the f...
The North-American walnut shield bearer Coptodisca lucifluella is reported as a new species for the fauna of Bulgaria. The species was detected on the common walnut Juglans regia at 36 localities in the urban and suburban areas in Bulgaria, at altitudes from 25 to 925 m a.s.
The Japanese grape leafhopper Arboridia kakogawana is reported as a new species to the fauna of Bulgaria. The leafhopper was detected on grapevines (Vitis sp.) at 16 out of the 65 localities investigated in Bulgaria, at altitudes from 15 to 350 m a.s.l. At present, A. kakogawana is still in the expansion phase of its invasion process in Bulgaria an...
Настоящият Кратък определител е изработен в рамките на проект „Повишаване на познанията за чуждите видове с помощта на гражданската наука: Подходи за изпълнение на гражданската наука за чуждите видове, управление на данните и стандарти“ (КП-06COST-13). Целта му е да предостави информация и повиши осведомеността на ползвателите за ИЧВ животни от зна...
02.06.2017 г. стартира изпълнението на проект BG05M2OP001-2.009-0034 "Подкрепа за развитието на научния капацитет в Лесотехнически университет", финансиран от Оперативна програма "Наука и образование за интелигентен растеж" (2014-2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели на...
Sentinel plants, plants in exporting countries that are inspected at regular intervals for signs and symptoms of invertebrate pests and microbial pathogens, are a promising tool for detecting and identifying harmful organisms of woody plants prior to their introduction into importing countries. Monitoring of sentinel plants reveals crucial informat...
На 02.06.2017 г. стартира изпълнението на проект "Подкрепа за развитието на научния капацитет в Лесотехнически университет", финансиран от Оперативна програма "Наука и образование за интелигентен растеж" (2014-2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели на проекта беше повишав...
На 02.06.2017 г. стартира изпълнението на проект "Подкрепа за развитието на научния капацитет в Лесотехнически университет", финансиран от Оперативна програма "Наука и образование за интелигентен растеж" (2014-2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели на проекта беше повишав...
Една от основните цели на проект BG05M2OP001-2.009-0034 "Подкрепа за развитието на научния капацитет в Лесотехнически университет" беше повишаването на интереса на младите хора и обществеността към научните изследвания и резултатите от тях. Това напълно съвпадаше и с целта на процедура "Подкрепа за развитието на докторанти, постдокторанти, специали...
На 02.06.2017 г. стартира изпълнението на проект BG05M2OP001-2.009-0034 "Подкрепа за развитието на научния капацитет в Лесотехнически университет", финансиран от Оперативна програма "Наука и образование за интелигентен растеж" (2014-2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели...
Проектът „Подкрепа за развитието на научния капацитет в Лесотехнически университет“, беше финансиран от Оперативна програма „Наука и образование за интелигентен растеж” (2014 - 2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели на проекта беше повишаването на интереса на младите хора...
На 02.06.2017 г. стартира изпълнението на проект „Подкрепа за развитието на научния капацитет в Лесотехнически университет“, финансиран от Оперативна програма „Наука и образование за интелигентен растеж” (2014 - 2020). Един от акцентите на проекта беше ангажирането на студенти в различни дейности свързани с разпространението и популяризирането на н...
Проектът „Подкрепа за развитието на научния капацитет в Лесотехнически университет“, беше финансиран от Оперативна програма „Наука и образование за интелигентен растеж” (2014 - 2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цели на проекта беше повишаването на интереса на младите хора...
Провеждането на кръгли маси и участието в изложения като инструменти за популяризиране на научните изследвания в областта на управлението и устойчивото използване на биологичните ресурси в рамките на проект "Подкрепа за развитието на научния капацитет в Лесотехнически университет" Румен Томов, Елена Цветкова Една от основните цели на проект BG05M2O...
На 02.06.2017 г. стартира изпълнението на проект BG05M2OP001-2.009-0034 „Подкрепа за развитието на научния капацитет в Лесотехнически университет“, финансиран от Оперативна програма „Наука и образование за интелигентен растеж” (2014 - 2020) съфинансирана от Европейския съюз чрез Европейските структурни и инвестиционни фондове. Една от основните цел...
Standardized tools are needed to identify and prioritize the most harmful non-native species (NNS). A plethora of assessment protocols have been developed to evaluate the current and potential impacts of non-native species, but consistency among them has received limited attention. To estimate the consistency across impact assessment protocols, 89...
There is no sign of saturation in accumulation of alien species (AS) introductions
worldwide, additionally the rate of spread for some species has also been shown to be
increasing. However, the challenges of gathering information on AS are recognized. Recent developments in citizen science (CS) provide an opportunity to improve data flow and
knowle...
Effective policy making and management relies on a solid knowledge base, which largely depends on the availability and quality of underpinning data and the tools needed to share it between scientists, decision makers and managers. This is particu‑larly true for the invasive alien species (IAS).
The East and South European Network for Invasive Alie...
The project: East and South European Network for Invasive Alien Species – A tool to support the management of alien species in Bulgaria (ESENIAS‑TOOLS) was implemen‑ted in the period 2015‑2017. The project was funded by the Financial Mechanism of the European Economic Area 2009‑2014, within the Programme BG03 Biodiversity and Ecosystem Services, an...
A preliminary list of non-indigenous scale insect species on ornamental plants in Bulgaria and China is presented. The sampling was done between April and November, 2009, in the frame-work of the project "Invasive scale insects on ornamental plants in Bulgaria and China". The insects were collected in nurseries, parks, gardens, botanical collection...
Trichkova T., Tomov R., Vladimirov V., Hubenov Z., Koshev Y., Nikolov B., Tzankov N., Stanchev R., Hardalova R.. Alien species in Bulgaria: Policy, projects, research and awareness raising. Rat M., T. Trichkova, R. Scalera, R. Tomov, A. Uludag (Eds.), First ESENIAS Report: State of the Art of Invasive Alien Species in South-Eastern Europe. Publishe...
Tree professionals play an important role in protecting forests against invasive pests. Their awareness of pests and knowledge of how they spread is likely to be a key component of effective detection, eradication and management measures, but very little is known about awareness levels of this stakeholder group. To address this important evidence g...
Investigations on the microflora of the long-tailed mealybug Pseudococcus longispinus (Targioni-Tozzetti) (Hemiptera: Pseudococcidae) were performed. The following microorganisms were isolated: Salmonella enterica, Serratia plymutica, Enterobacter agglomerans, Staphylococcus cohnii, Bacillus spp., Clostridium spp., Listeria sp., Candida krusei, Pen...
Question and Methods: Many important pest species have alien origin and their introductions and expansions have been increasing due to human activities and global change. Invasive alien species (IAS) threaten not only biodiversity and unmanaged areas but also socio-economy and managed areas. Most of alien species are not covered by the plant and an...
The scale insects of Bulgaria are a comparatively well-studied group. The most substantial contribution was made by Tsalev (1968), who listed 89 species belonging to 8 families, 55 new to Bulgaria. Using all literary sources, we have increased the number of species found in Bulgaria to 145 in 11 families and 65 genera. Thirty-eight of these are of...
Small mammals (Micromammalia) are the most widespread wild vertebrates in a number of natural biotopes in Northeast and South Bulgaria.
The arachnids of the superorder Parasitiformes (syn. Gamazoidea) are among the most frequently encountered ectoparasites on them, basically representatives of the metastigmal (order Ixodida) and mesostigmal (order...
Small mammals (Micromammalia) are the most widespread wild vertebrates in a number of natural biotopes in Northeast and South Bulgaria.
The arachnids of the superorder Parasitiformes (syn. Gamazoidea) are among the most frequently encountered ectoparasites on them, basically representatives of the metastigmal (order Ixodida) and mesostigmal (order...
Classical biological control is often advocated as a tool for managing invasive species. However, accurate evaluations of parasitoid species complexes and assessment of host specificity are impeded by the lack of morphological variation. Here, we study the possibility of host races/species within the eulophid wasp Pediobius saulius, a pupal general...
Classical biological control is often advocated as a tool for managing invasive species. However, accurate evaluations of parasitoid species complexes and assessment of host specificity are impeded by the lack of morphological variation. Here, we study the possibility of host races/species within the eulophid wasp Pediobius saulius, a pupal general...
Classical biological control is often advocated as a tool for managing invasive
species. However, accurate evaluations of parasitoid species complexes and
assessment of host specificity are impeded by the lack of morphological variation.
Here, we study the possibility of host races/species within the eulophid
wasp Pediobius saulius, a pupal general...
Entomopathogens, including protozoans, microsporidians and fungi are commonly isolated from insects and some of them have potential for biological control programs. The last thirty years an increase of the records of alien invasive insects was observed in Bulgaria. So far 270 alien insect species are registered in the country and around 48 species...
The enemy release hypothesis posits that the initial success of invasive species depends on the scarcity and poor adaptation of native natural enemies such as predators and parasitoids. As for parasitoids, invading hosts are first attacked at low rates by a species-poor complex of mainly generalist species. Over the years, however, parasitoid richn...
We provide a comprehensive overview of those Lepidopteran invasions to Europe that result from increasing globalisation and also review expansion of species within Europe. A total of 97 non-native Lepidoptera species (about 1% of the known fauna), in 20 families and 11 superfamilies have established so far in Europe, of which 30 alone are Pyraloide...
The effect of the alien horse-chestnut leaf miner, Cameraria ohridella, on native fauna was studied by comparing the species richness of native leaf miner communities and the abundance of selected
native leaf miner species in the presence and absence of horse-chestnut trees infested by C. ohridella, in various environments in Europe. The species ri...
Two adults of the Multicolored ladybird, Harmonia axyridis (PALLAS, 1773) (Coleoptera: Coccinellidae) were identified in 2009 during the examination of old samples collected in July 2008 at Sofia. In July 2009, larvae of H. axyridis were collected from Paliurus spina-christi Mill. infested by Aphis sp. at Kresna defile (near Blagoevgrad). Large rep...
By screening of six synthetic lepidopteran sex attractants in Evskinograd Park, Varna, in 1997, mainly targeted to Phyllonorycter, platani, numerous P sublautella males were caught in traps baited with Z10-tetrtadecenyl acetate. This is the first detailed report about the occurrence of this species in Bulgaria and the first report for Northern Bulg...
Parasitism was investigated in sympatric populations of three invasive gracillariid leaf miners in Europe, Cameraria ohridella, Phyllonorycter robiniella and Phyllonorycter platani to test the hypotheses that C. ohridella is less heavily parasitized by native parasitoids and attacked by fewer species than the two other invasive species. In all re...
The horse-chestnut leaf miner, Cameraria ohridella, is an invasive alien species defoliating horse-chestnut, a popular ornamental tree in Europe. This paper presents quantitative data on mortality factors affecting larvae and pupae of the leaf miner in Switzerland and Bulgaria, both in urban and forest environments. Two sampling methods were used a...
1 The horse‐chestnut leafminer, Cameraria ohridella Deschka & Dimic, was discovered during a mass outbreak on planted horse‐chestnut trees, Aesculus hippocastanum , near Lake Ohrid in Macedonia. However, several peculiarities in the leafminer's biology and ecology, such as its inefficient control through natural enemies, indicate that it may be of...
The parasitism of the horse chestnut leafminer remains at a low level in Europe since many years. As a consequence, horse chestnuts in regions with more than 20 years of C. ohridella infestation still suffer from heavy leafminer attack.However, results of our investigations show changes in the parasitoid complex over the years, reflecting three dif...
In this paper we will describe pulsed laser deposition of Nd:KGW films on Si substrate by introducing (100 or 111) CeO2 buffer layer. The KrF excimer laser (λ=248 nm, τ=27 ns, v=20 Hz) is used for ablation. The Rutherford backscattering (RBS), X-ray diffraction (XRD) analyses, PL measurements, and waveguide propagation have been performed. The anne...
Proceedings : IUFRO Kanazawa 2003 "Forest Insect Population Dynamics and Host Influences"., Scedule:14－19 September 2003, Vemue: Kanazawa Citymonde Hotel, Kanazawa, Japan, Joint metting of IUFRO working groups : 7.01.02 Tree resistance to Insects | 7.03.06 Integrated management of forset defoloating insects | 7.03.07 Population dynamics of forest i...
Combined laser ablation and pulse modulated radio-frequency (RF) discharge for deposition of CNalpha films was studied by the use of optical emission spectroscopy. Chemically active nitrogen was produced by RF discharge, concentrated between two small electrodes. Influence of RF power, nitrogen pressure, modulation frequency and pulse rate on nitro...
Strontium hexaferrite (SrFe12O19) thin films were grown by pulsed laser deposition on (0 0 0 1) single crystal sapphire substrates at substrate temperatures of 600 and 800 °C. Post-deposition Nd:YAG laser annealing with external magnetic field was applied. The films deposited at the higher substrate temperature were c-axis textured. Very high squar...
We investigated the effect of substrate orientation and film thickness on the microstructure and magnetic properties of Sr- ferrite films grown on (0001) and 1102) sapphire substrates by pulsed laser deposition (PLD). The films grown on (1102) sapphire displayed a presence of various magnetic phases, including SrFe12O19 Fe2O3 and Fe3O4. The single...
High-quality epitaxial strontium-hexaferrite (SrFe12O19) thin films were grown by pulsed laser deposition (PLD) on c-cut sapphire using KrF∗ excimer laser at a fluency of 2 J/cm2 and substrate temperature of 800°C in 100 mTorr oxygen environment. The X-ray diffraction (XRD) and morphology analyzes showed films with excellent crystalline structure a...
A strain of Steinernema carpocapsae obtained from overwintering codling moths collected in Bulgaria was identified to species using the polymerase chain reaction. The infectivity of this strain towards codling moth prepupae was compared to that of a U.S. strain at three temperatures (11, 15and 20 °C). Infectivity was low at 11 °C with 8% mortality...
The horse-chestnut leaf miner, Cameraria ohridella Deschka and Dimic (Lepidoptera: Gracillariidae), is a moth of unknown origin that was first observed in Macedonia in the late 1970s. Since then, it has spread over most of Europe, causing permanent outbreaks on the European horse-chestnut, Aesculus hippocastanum L. (Sapindales: Sapindaceae), a majo...
Proceedings : IUFRO Kanazawa 2003 "Forest Insect Population Dynamics and Host Influences"., Scedule:14－19 September 2003, Vemue: Kanazawa Citymonde Hotel, Kanazawa, Japan, Joint metting of IUFRO working groups : 7.01.02 Tree resistance to Insects | 7.03.06 Integrated management of forset defoloating insects | 7.03.07 Population dynamics of forest i...
