Nana Gratiashvili

Nana Gratiashvili
Ilia State University | ISU · Institute of Zoology

Doctor of Philosophy

About

21
Publications
2,531
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96
Citations
Citations since 2016
8 Research Items
69 Citations
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201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
Introduction
Nana Gratiashvili currently works at the Institute of Zoology, Ilia State University. Nana does research in Entomology, Molecular Biology and Zoology.

Publications

Publications (21)
Article
Full-text available
The nut weevil (NW), Curculio nucum, is one of the main pests of hazelnuts which damages nut buds, leaves and especially fruits. Sometimes it destroys 80-90 percent of the crop. The study presents the results of using entomopathogenic microorganisms (nematodes and fungi) against NW. Local entomopathogenic nematodes (EPN) Steinernema borjomiense, S....
Article
Full-text available
Mating in ants often occurs on the wing during nuptial flights or on the ground when scattered female sexuals attract males by pheromones. In both scenarios, there is little opportunity for males to engage in prolonged aggressive competition or elaborate courtship displays. Male morphology is therefore adapted to locating female sexuals and mating,...
Article
The ant genus Cardiocondyla is characterised by a remarkable variability of reproductive life histories and colony structures. Little is known about the C. stambuloffii group, whose distribution extends from southeast Europe to central and eastern Asia. We here present data on the structure of Cardiocondyla colonies from southern Georgia. Morphomet...
Article
A new species of aphid, Xerobion eteriae sp. n., is described based on apterous and alate viviparous females, living on Acantholimon (Plumbaginaceae) in Iran. Differences from the most similar species of the genus are presented. http://www.zoobank.org/urn:lsid:zoobank.org:pub:A3FAD52D-ED85-4BD1-8A28-EEFD42E62E67
Article
Full-text available
The hitherto unknown oviparous females and alate males of M. dzhibladzeae Barjadze, 2010, living on Euphorbia macroceras Fish. & Mey. and Euphorbia sp. (Euphorbiaceae), are described from resort Bakhmaro (Chokhatauri district, Guria region, Western Georgia). The life cycle of this species is established. Apterous and alate viviparous females and ov...
Article
Full-text available
Nine aphid species are recorded for the first time from the following countries in the Palearctic region: four species from Iran, three species from Georgia and one species each from Germany and the Netherlands. Information on biology and geographical distribution for each species is also provided. Besides, three host plant species and one new host...
Article
1. Bergmann's rule states that organisms inhabiting colder environments show an increase in body size or mass in comparison to their conspecifics living in warmer climates. Although originally proposed for homoeothermic vertebrates, this rule was later extended to ectotherms. In social insects, only a few studies have tested this rule and the resul...
Article
Full-text available
At present the biological control as a pest control technology is becoming more desirable. Biological formulations on basis of entomopathogenic nematodes is one of the effective means for the protection of agricultural and forest plants from harmful insects. Nowadays, the use of entomopathogenic nematodes as biological control agents is a key compo...
Article
Animal societies vary considerably concerning how reproductive rights are partitioned among individual group members (“reproductive skew”). Nestmate queens of most polygynous species contribute more or less equally to the brood, but queens of a few species of the genus Leptothorax form dominance hierarchies in which only the top ranking queen lays...
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Annotated list of the invertebrates in the caves of Racha region (Western Georgia) is made based on proper and literature data. 73 species of the invertebrates are recorded in the karst caves, 29 species of which belong to the oribatid mites, 12 species-to collembolans, 8 species – to spiders and insects, 5 species – to myriapods, 4 species – to mo...
Article
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The ant genus Myrmoxenus consists of about ten socially parasitic species including active slave-makers and workerless "degenerate slave-makers". Myrmoxenus tamarae was previously known only from type material, two workers collected at Daba, Georgia and nothing was known about its life history, colony structure or the morphology of its sexuals. An...
Article
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A small minority of the presently recognized ∼12,500 species of ants are slave-makers, which permanently depend on the help of “slave workers,” that is workers of other ant species, which they pillage as brood from their nests in well-organized slave raids. The genus Myrmoxenus is one of the most species-rich taxa of slave-making ants, but individu...
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Efficacy of entomopathogenic nematode Steinernama feltiae in biocontrol of larvae of beet moth Gnorimoschema ocellatella Boyd. is studied. In the experiments carried out under different climatic conditions in June and August two different concentrations of nematode suspension 2000 and 4000 nem/ml water were used against harmful pests. Results of th...
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Fundatrices of Zelkovaphis caucasica (Dzhibladze 1960) are described and illustrated. A key to the fundatrices of the genus Zelkovaphis species is given. A transfer experiment was carried out to establish the life cycle of Z. caucasica. In addition, the life cycle of this species was studied in field conditions. The secondary host plant was establi...
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Alate viviparous females of Wahlgreniella nervata (Gillette) were found on a Damask rose (Rosa damascena Mill.) plantation in Isparta Province, Turkey. The aphid is recorded for the first time from Turkey. Besides, Damask rose is a new host for this species. Brief information about this aphid including a key to the alate females of aphid species kn...
Article
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Aphidius eglanteriae as a parasitoid of Chaetosiphon tetrarhodum/ Rosa is newly recorded for Turkey. Short information about its parasitism rate and distribution in Isparta Province, Turkey, is given. A nother new information pertains to the association between Aphidius matricariae - Aphis illinoisensis - Vitis vinifera.
Article
Full-text available
43 aphid species, living on 39 host plants, were recorded from the Ajameti reserve (Georgia) in 2008. Two species (Aphis rubiae Narzikulov, 1964 and A. violae Schouteden, 1900) were recorded for the first time from Transcaucasia, while fourteen species were new records for Imereti Region. Fundatrices of Macrosiphum symphyti Barjadze et Chakvetadze,...
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Apterous viviparous females of Macrosiphum dzhibladzeae Barjadze sp. n. living on Euphorbia macroceras (Euphorbiaceae) are described and illustrated. A key to the apterous viviparous females of Macrosiphum species living on Euphorbia spp. worldwide is given. A previous key for the apterous viviparous females of the Macrosiphum species recorded from...
Article
Thirty one species of aphids found in Imereti Region in 2004-2007 are recorded in the annotated list. 15 species and one subspecies of them are new record for Imereti Region, while Aphis salsolae are recorded for the fi rst time from Transcaucasia.
Article
Full-text available
The investigation of the ants began from the end of 80s of 19 th century in Georgia. In the investigation of Georgian ants have contributed Georgian and foreign scientists as well. According to nowdays in Georgia are recorded 142 species of ants, which are united in 4 subfamilies and in 35 genera.

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