Oldřich Nedvěd

Oldřich Nedvěd
University of South Bohemia in České Budějovice · Faculty of Science

Professor

About

146
Publications
49,642
Reads
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2,412
Citations
Additional affiliations
September 1989 - present
The Czech Academy of Sciences
Position
  • Senior Researcher
September 1989 - present
Institute of Entomology ASCR
Position
  • Senior Researcher

Publications

Publications (146)
Article
Ladybirds (Coleoptera: Coccinellidae) are an important beneficial group that, as other insects, are negatively affected by many human-mediated threats, including climate change, agricultural intensification, habitat loss, pollution, and biological invasions. Ecological impacts from these threats have altered the richness, abundance, and distributio...
Article
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Hesperomyces virescens (Ascomycota, Laboulbeniales), a fungal ectoparasite, is thus far reported on Harmonia axyridis from five continents: North and South America, Europe, Africa, and Asia. While it is known that He. virescens can cause mortality of Ha. axyridis under laboratory conditions, the role of biotic and abiotic factors in influencing the...
Article
Full-text available
The cold hardiness of overwintering stages affects the distribution of temperate and cold-zone insects. Studies on Erebia, a species-rich cold-zone butterfly genus, detected unexpected diversity of cold hardiness traits. We expanded our investigation to eight Satyrinae species of seven genera. We assessed Autumn and Winter supercooling points (SCPs...
Article
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Overwintering adult coccinellids were collected underneath the bark of tree trunks of apricot, pomegranate, almond and mulberry in the Mehriz region of Yazd province, Iran, from 2009 to 2012 at elevations 1420-1520 meters. We identified and illustrated the following six species: Adalia bipunctata (Linnaeus, 1758): 61 individuals, Exochomus quadripu...
Article
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Bacterial biofilms have been described on a number of fungal taxa. These microbial communities are of interest both from an ecological and a biotechnological point of view, as they have been shown to play a role in biodegradation and biosynthesis. This study is the first to show the presence of biofilms on thallus surfaces of Laboulbeniales, an ord...
Article
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Wildlife observations submitted by volunteers through citizen science initiatives are increasingly used within research and policy. Ladybirds are popular and charismatic insects, with most species being relatively easy to identify from photographs. Therefore, they are considered an appropriate taxonomic group for engaging people through citizen sci...
Article
Full-text available
The genus Coccidula Kugelann includes five species distributed in the Holarctic, with one species in North America and four in Palearctic region. Coccidula belongs to the tribe Coccidulini which historically was treated as a separate subfamily within ladybird beetles, but recent studies confirmed its placement as a tribe within the broadly defined...
Article
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Hippodamia Chevrolat, 1836 currently comprises 19 species. Four species of Hippodamia are native to the Palearctic region: Hippodamia arctica (Schneider, 1792), H. septemmaculata (DeGeer, 1775), H. tredecimpunctata (Linnaeus, 1758), and H. variegata (Goeze, 1777). Here, we provide an identification key to these species, along with illustrations of...
Article
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The ladybird Hyperaspis pseudopustulata Mulsant, 1853 was recently reported as the 13th species of the genus Hyperaspis of Iran. Because of the lack of sufficient details in the original description, here we provide more details of morphological features by the help of electron microscope and quantitative morphometric measurements of Iranian H. pse...
Article
Full-text available
A BS TRA CT. The ladybird Hyperaspis pseudopustulata Mulsant, 1853 was recently reported as the 13 th species of the genus Hyperaspis of Iran. Because of the lack of sufficient details in the original description, here we provide more details of morphological features by the help of electron microscope and quantitative morphometric measurements of...
Article
Full-text available
Understanding of habitat favourability has wide relevance to the invasion biology of alien species. We studied the seasonal dynamics of the alien ladybird Harmonia axyridis (Coleoptera: Coccinellidae) in monoculture Scots pine forest stands in southwest Slovakia, Central Europe, from April 2013 to March 2015. Adult H. axyridis were collected monthl...
Article
Full-text available
Harmonia axyridis is an invasive alien ladybird in North America and Europe. Studies show that multiple natural enemies are using Ha. axyridis as a new host. However, thus far, no research has been undertaken to study the effects of simultaneous infection by multiple natural enemies on Ha. axyridis. We hypothesized that high thallus densities of th...
Article
Full-text available
Intraguild predation (IGP) is a ubiquitous, important and common interaction that occurs in aphidophagous guilds. The effects of extraguild prey (EGP, i.e., aphids) density, predator life stage combinations and duration of the interaction on the level, asymmetry and direction of intraguild predation between lacewing Chrysoperla carnea and ladybird...
Preprint
Full-text available
Harmonia axyridis is an invasive alien ladybird in North America and Europe. Studies show that multiple natural enemies are using Ha. axyridis as a new host. However, thus far, no research has been undertaken to study the effects of simultaneous infections of multiple natural enemies on Ha. axyridis. We hypothesized that high thallus densities of t...
Article
We report on two lady beetle species, Oenopia conglobata (Linnaeus) and Adalia bipunctata (Linnaeus), sympatric in Chaharmahal and Bakhtiari Province, Iran, closely resembling each other in coloration. This may be an interesting example of M¨ullerian mimicry. The putative model, O. conglobata, retains its typical pink elytral background with 16 bla...
Article
Full-text available
Oenopia shirkuhensissp. nov. (Coleoptera, Coccinellidae) is described and illustrated. It was found in the mountains around Shirkooh mountain, Yazd province, and in the Kukhbenan Mountains, Kerman province, Iran. It is similar to a common ladybird Adalia bipunctata by the colour pattern on elytra. Congeneric species occurring in Iran, O. conglobata...
Article
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Colour and colour patterns seem to be especially important visual warning signals for predators, which might have innate or learned ability to avoid aposematic prey. To test the importance of larval colour pattern of the aposematic ladybird Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), an invasive alien species in Europe, we presented the...
Article
Full-text available
Over the past few decades, many records of the parasitoids parasitizing Coccinellidae have been reported from Iran. Some of them, presented in hard to access conference proceedings, theses, older books and journal articles, were then inaccurately quoted in other papers. Furthermore, some other records were subsequently considered misidentifications...
Conference Paper
Full-text available
Extended abstract: Recording of ladybirds by volunteers has a long history in a number of countries in Europe and other continents (Losey et al., 2007; Brown et al., 2008; Saethre et al., 2010; Gardiner et al., 2012; Grez and Zaviezo, 2015; Pocock et al., 2015; Roy and Brown, 2015; Roy et al., 2015). However, there are inherent spatial, temporal an...
Article
Full-text available
The ectoparasitic fungus Hesperomyces virescens was studied on its invasive host, the harlequin ladybird Harmonia axyridis, in the Czech Republic. A primary aim was to examine the relationship between fungal infection and elytral coloration of the ladybird. Furthermore, the role of host sex and mating status of females were analyzed. Beetles (n = 1...
Article
Full-text available
The harlequin ladybird, Harmonia axyridis, is considered to be one of the most invasive insect species worldwide. Its invasion success and extreme speed of range expansion has been partially attributed to weak control of its populations by natural enemies. Previously published data on emergence rates of the hymenopteran parasitoid Dinocampus coccin...
Article
Carotenoids are important pigments of ladybirds providing bright red colouration. We measured the rate of deposition of carotenoids with age in elytra of two ladybird species in ethanol extracts, as well effects of sex and temperature. In Coccinella undecimpunctata, content of carotenoids continued to increase after 60 days of adult age at both 20...
Article
Full-text available
Fungal species identities are often based on morphological features, but current molecular phylogenetic and other approaches almost always lead to the discovery of multiple species in single morpho-species. According to the morphological species concept, the ant-parasitic fungus Rickia wasmannii (Ascomycota, Laboulbeniales) is a single species with...
Article
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1. Few, if any, experimental tests have demonstrated the anti‐predator protection of the developmental stages of ladybirds (Coleoptera: Coccinellidae) against vertebrates, despite the fact that both the visual appearance of ladybirds and the content of defensive compounds fulfil the definition of an aposematic prey. 2. In this study, avian predator...
Article
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The harlequin ladybird, Harmonia axyridis (Pallas, 1773), is native to Asia but has been introduced to many countries, both intentionally and unintentionally. In the Middle East region, H. axyridis was so far only known from Iran and Turkey. This study reports H. axyridis for the first time from a country with a hot desert climate, Saudi Arabia. Th...
Article
The Asian lady beetle Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is one of the most invasive insects worldwide. It has been introduced into several continents for classical biological control and by accident. The current study is the first report of this species from Iran (new country record). All developmental stages and adults of two...
Article
Full-text available
For biological control it is necessary to store mass-reared biological control agents when the demand is low. The objective of this study is to increase their shelf life without significantly reducing their fitness. The ladybird Hippodamia variegata is a widespread and voracious aphidophagous predator, with an important role in decreasing the abund...
Article
Full-text available
We surveyed ladybirds (Coleoptera: Coccinellidae) in 10 stands of Scots pine (Pinus sylvestris), all monoculture stands 5–100 years old, in western Slovakia, Central Europe, over two successive periods, October 2013 – March 2014 and October 2014 – March 2015. The winter in each period was exceptionally mild. Ladybirds were collected from the lower...
Article
Full-text available
An updated and corrected checklist of species of ladybird beetles (Coleoptera: Coccinellidae) known in Algeria now contains 75 species belonging in ten tribes. New country records include the European species Oenopiaconglobata and the invasive Asian species Harmoniaaxyridis . Sampling data is provided for 14 species found during a faunistic survey...
Article
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Based on reviewing the previous relevant literature on Iranian ladybirds as well as identifying and studying coccinellid specimens collected during 2013–2016 from various localities in Lorestan province (Western Iran), a revised checklist of the Coccinellidae of Lorestan is presented, with 57 species from 25 genera of 10 tribes. Tytthaspis sedecimp...
Article
A species of ladybird beetles: Coccinella leonina transversalis Fabricius, is newly recorded from Iran. Identification keys to Iranian species of the genera Coccinella Linnaeus 1758, Pharoscymnus Bedel, 1906, subgenus Scymnus s.str. Kugelann, 1794 and redescription of Pharoscymnus horni (J. Weise, 1901) are given.
Article
Full-text available
The harlequin ladybird Harmonia axyridis (Coleoptera: Coccinellidae) has rapidly spread in several continents over the past 30 years and is considered an invasive alien species. The success of H. axyridis as an invader is often attributed to weak control by natural enemies. In this paper, we provide an overview of current knowledge on predators and...
Article
Myzus persicae (Sulzer) (Hemiptera: Aphididae) is one of the most common and harmful species attacking sweet pepper. Here, we compared the predation rate and performance of Adalia bipunctata (L.), Hippodamia variegata (Goeze) and Scymnus interruptus Goeze (Coleoptera: Coccinelidae) fed on Myzus persicae (Sulzer) (Hemiptera: Aphididae) infesting swe...
Conference Paper
Full-text available
Diverse findings related to reproduction of the invasive ladybird Harmonia axyridis from field observations and laboratory experiments are summarized. Sperm in fertilized females remains viable after several months of overwintering. Progeny of a single female has about 5 different fathers. Melanic individuals in spring mated more frequently than li...
Article
Full-text available
Understanding the factors restricting the distribution of some insect species to high altitudes is hindered by poor knowledge of temporal changes in their cold hardiness during overwintering. We studied overwintering larvae of five species of Erebia butterflies (Lepidoptera: Nymphalidae: Satyrinae) differing in altitudinal distribution: lowland E....
Article
Full-text available
Faunistical description of ladybird assemblages from the canopies of agricultural plants and orchard trees in northeastern Iran and determination of the indicator ladybird species that are representative of the region are the main goals of this survey. In total, 21 coccinellid species belonging to 16 genera were collected and identified. One previo...
Article
A key to genera of Iranian Coccinellidae, besides species of subfamilies Chilocorinae, Coccinellinae, Epilachinae and Microweiseinae is given.
Article
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Objective: To compare changes in supercooling point (SCP) and cryoprotectant concentration(CPAc) of outdoor-reared caterpillars. Materials and methods: SCP was measured with a thermocouple and CPAc by gas chromatography monthly during winter. Results: Seasonal changes in SCP and CPAc in overwintering larvae followed the pattern of change in am...
Article
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Background The tribe Coccinellini is a group of relatively large ladybird beetles that exhibits remarkable morphological and biological diversity. Many species are aphidophagous, feeding as larvae and adults on aphids, but some species also feed on other hemipterous insects (i.e., heteropterans, psyllids, whiteflies), beetle and moth larvae, pollen...
Article
Full-text available
Harmonia axyridis (Coleoptera: Coccinellidae) has been introduced widely for biological control of agricultural pests. Harmonia axyridis has established in four continents outside of its native range in Asia and it is considered an invasive alien species (IAS). Despite a large body of work on invasion ecology, establishment mechanisms of IAS and th...
Article
Forty-five records of 28 species of ladybird beetles (belonging to 15 genera, 8 tribes and 6 subfamilies of Coccinellidae) as new for particular provinces in Iran are presented. The ten provinces with new records are Alborz, Golestan, Hamadan, Hormozgan, Kohgiluyeh and Boyer-Ahmad, Mazandaran, North Khorasan, Sistan and Baluchistan, Tehran, and Zan...
Article
We investigated factors which may determine realised paternity following multiple mating in a promiscuous ladybird Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), namely the mating order and ability of males of different morphs to fertilize females. In experiments using males of two colour morphs, we found that the first male had a reproduc...
Article
Full-text available
The Iranian members of the tribe Hyperaspidini Mulsant, 1846 (Coleoptera: Coccinellidae) are reviewed. The group includes 12 species, all placed in a single genus, Hyperaspis Chevrolat, 1836. Hyperapsis asiatica Lewis, 1896 and H. pumila Mulsant, 1850 are excluded from the Iranian list of Coccinellidae. Diagnoses of the tribe Hyperaspidini and the...
Article
We evaluated the status of native ladybird assemblages in the presence of the non-native ladybird Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in three European countries. To achieve this, we assessed the abundance of ladybirds from common host plants in urban areas of Great Britain, Czech Republic and Slovak Republic in 2014. We determined...
Article
Full-text available
The Iranian species of the tribe Hyperaspidini Mulsant, 1846 (Coleoptera: Coccinellidae) are reviewed. The current list includes 12 species, all placed in a single genus Hyperaspis Chevrolat, 1836. Hyperapsis asiatica Lewis, 1896 and H. pumila Mulsant, 1850 are excluded from the Iranian list of Coccinellidae. Diagnoses of the tribe Hyperaspidini an...
Conference Paper
Full-text available
Changing shape and size of Hippodamia variegata (Goeze, 1777) (Col.: Coccinellidae), as one of the most important biocontrol species which is reared in laboratories of many countries, could affect its biology and subsequently results of scientific studies and also biological control. In this regard, a geometric morphometric study was carried out ba...
Article
Full-text available
An updated checklist of the Coccinellidae species of the former subfamily Sticholotidinae recorded from Iran is provided. Eleven species are reported: two species classified presently in the subfamily Microweiseinae (in the genera Paracoelopterus Normand, 1936 and Serangium Blackburn, 1889), and nine species classified in the tribe Sticholotidini o...
Article
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Growing evidence exists that aposematic and toxic prey may be included in a predator's diet when the predator experiences physiological stress. The tree sparrow Passer montanus is known to have a significant portion of aposematic and toxic ladybirds in its natural diet. Here, we present experiments testing the attack and eating rate of the tree spa...