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  1. Article ; Online: Intraspecific and interspecific comparison of toxicity of ladybirds (Coleoptera: Coccinellidae) with contrasting colouration.

    Aslam, Muhammad / Nedvěd, Oldřich

    Zoology (Jena, Germany)

    2024  Volume 162, Page(s) 126144

    Abstract: Ladybirds (Coccinellidae) use toxic compounds, mostly alkaloids in their haemolymph, for defence against predators and other enemies. The toxicity of ladybirds to predators cannot be directly assessed because predators show avoidance reactions without ... ...

    Abstract Ladybirds (Coccinellidae) use toxic compounds, mostly alkaloids in their haemolymph, for defence against predators and other enemies. The toxicity of ladybirds to predators cannot be directly assessed because predators show avoidance reactions without ingesting the beetles. The alkaloid of ladybird Harmonia axyridis showed wide range toxicity to diverse non-target organisms. Thus, we used a quick, inexpensive and easy-to-perform method using bioassays on water flea Daphnia magna for comparative quantification of the toxicity (LD
    MeSH term(s) Animals ; Coleoptera/chemistry ; Color
    Language English
    Publishing date 2024-01-20
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1191401-4
    ISSN 1873-2720 ; 0944-2006
    ISSN (online) 1873-2720
    ISSN 0944-2006
    DOI 10.1016/j.zool.2024.126144
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 73/711: Show issues

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  2. Article ; Online: Root elongation test on seeds of Sinapis alba reveals toxicity of extracts from thirteen colour forms of the Asian multi‐coloured ladybird, Harmonia axyridis

    Sakaki, Samane / Nedvěd, Oldřich

    Entomologia Experimentalis et Applicata. 2023 Mar., v. 171, no. 3 p.186-195

    2023  

    Abstract: Ladybirds (Coleoptera: Coccinellidae) use toxic compounds such as alkaloids in their hemolymph to defend against predators and pathogens. Direct measurement of their toxicity to predators is unavailable as predators show various avoidance reactions ... ...

    Abstract Ladybirds (Coleoptera: Coccinellidae) use toxic compounds such as alkaloids in their hemolymph to defend against predators and pathogens. Direct measurement of their toxicity to predators is unavailable as predators show various avoidance reactions without eating the beetles. Because inhibition by harmonine – the alkaloid of the alien invasive ladybird Harmonia axyridis (Pallas) – was observed in many organisms, its toxicity can also be tested on various non‐target organisms. This is the first study examining ladybird alkaloid toxicity to plants. We used a quick, inexpensive, and easy‐to‐perform method to quantify the phytotoxicity of 13 strains of H. axyridis, representing natural colour forms and spontaneous laboratory mutations. We used the seed germination rate and root elongation of seedlings of Sinapis alba L. (Brassicaceae). Following a logistic curve, root length decreased with increasing concentration of the extract from adult beetles. The effect of extracts from the cowpea weevil, Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae) (negative control) did not differ from the control (water). Extract from the lesser mealworm Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae) (positive control) decreased the root length to about half of that of the negative control. Extract from young ladybirds (1 week old) decreased the root length to about one‐third of the control and the extract from 3‐month‐old ladybirds to one‐10th. Differences in toxicity among all 13 strains were minor and not consistent for the two age cohorts.
    Keywords Alphitobius diaperinus ; Callosobruchus maculatus ; Chrysomelidae ; Harmonia axyridis ; Sinapis alba ; adults ; alkaloids ; color ; hemolymph ; phytotoxicity ; root growth ; seed germination
    Language English
    Dates of publication 2023-03
    Size p. 186-195.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 216272-6
    ISSN 0013-8703
    ISSN 0013-8703
    DOI 10.1111/eea.13271
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    In stock of ZB MED Bonn / Germany

    Z 1216: Show issues

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  3. Article ; Online: Infection patterns of Harmonia axyridis (Coleoptera: Coccinellidae) by ectoparasitic microfungi and endosymbiotic bacteria.

    Awad, Mona / Piálková, Radka / Haelewaters, Danny / Nedvěd, Oldřich

    Journal of invertebrate pathology

    2023  Volume 197, Page(s) 107887

    Abstract: The invasive alien ladybird Harmonia axyridis (Coleoptera: Coccinellidae) hosts a wide range of natural enemies. Many observations have been done in nature but experimental studies of interactions of multiple enemies on Ha. axyridis are rare. In light of ...

    Abstract The invasive alien ladybird Harmonia axyridis (Coleoptera: Coccinellidae) hosts a wide range of natural enemies. Many observations have been done in nature but experimental studies of interactions of multiple enemies on Ha. axyridis are rare. In light of this knowledge gap, we tested whether the host phenotype and presence of bacterial endosymbionts Spiroplasma and Wolbachia affected parasitism of Ha. axyridis by the ectoparasitic fungus Hesperomyces harmoniae (Ascomycota: Laboulbeniales). We collected 379 Ha. axyridis in the Czech Republic, processed specimens, including screening for He. harmoniae and a molecular assessment for bacteria, and calculated fecundity and hatchability of females. We found that high hatchability rate (71 %) was conditioned by high fecundity (20 eggs daily or more). The average parasite prevalence of He. harmoniae was 53 %, while the infection rate of Spiroplasma was 73 % in ladybirds that survived in winter conditions. Wolbachia was only present in 2 % of the analyzed ladybirds. Infection by either He. harmoniae or Spiroplasma did not differ among host color morphs. In the novemdecimsignata morph, younger individuals (with orange elytra) were more heavily parasitized compared to old ones (with red elytra). Fecundity and hatchability rate of females were unaffected by infection with either He. harmoniae or Spiroplasma. However, female ladybirds co-infected with He. harmoniae and Spiroplasma had a significantly lower fecundity and hatchability compared to females with only one or no symbiont.
    MeSH term(s) Female ; Animals ; Coleoptera/microbiology ; Ascomycota ; Fertility ; Spiroplasma ; Seasons ; Wolbachia
    Language English
    Publishing date 2023-01-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 390885-9
    ISSN 1096-0805 ; 0022-2011
    ISSN (online) 1096-0805
    ISSN 0022-2011
    DOI 10.1016/j.jip.2023.107887
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 958: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Infection patterns of Harmonia axyridis (Coleoptera: Coccinellidae) by ectoparasitic microfungi and endosymbiotic bacteria

    Awad, Mona / Piálková, Radka / Haelewaters, Danny / Nedvěd, Oldřich

    Journal of Invertebrate Pathology. 2023 Mar., v. 197 p.107887-

    2023  

    Abstract: The invasive alien ladybird Harmonia axyridis (Coleoptera: Coccinellidae) hosts a wide range of natural enemies. Many observations have been done in nature but experimental studies of interactions of multiple enemies on Ha. axyridis are rare. In light of ...

    Abstract The invasive alien ladybird Harmonia axyridis (Coleoptera: Coccinellidae) hosts a wide range of natural enemies. Many observations have been done in nature but experimental studies of interactions of multiple enemies on Ha. axyridis are rare. In light of this knowledge gap, we tested whether the host phenotype and presence of bacterial endosymbionts Spiroplasma and Wolbachia affected parasitism of Ha. axyridis by the ectoparasitic fungus Hesperomyces harmoniae (Ascomycota: Laboulbeniales). We collected 379 Ha. axyridis in the Czech Republic, processed specimens, including screening for He. harmoniae and a molecular assessment for bacteria, and calculated fecundity and hatchability of females. We found that high hatchability rate (71 %) was conditioned by high fecundity (20 eggs daily or more). The average parasite prevalence of He. harmoniae was 53 %, while the infection rate of Spiroplasma was 73 % in ladybirds that survived in winter conditions. Wolbachia was only present in 2 % of the analyzed ladybirds. Infection by either He. harmoniae or Spiroplasma did not differ among host color morphs. In the novemdecimsignata morph, younger individuals (with orange elytra) were more heavily parasitized compared to old ones (with red elytra). Fecundity and hatchability rate of females were unaffected by infection with either He. harmoniae or Spiroplasma. However, female ladybirds co-infected with He. harmoniae and Spiroplasma had a significantly lower fecundity and hatchability compared to females with only one or no symbiont.
    Keywords Harmonia axyridis ; Laboulbeniales ; Spiroplasma ; Wolbachia ; color ; ectoparasites ; elytra ; fecundity ; females ; fungi ; invasive species ; invertebrates ; microsymbionts ; mixed infection ; parasitism ; phenotype ; Czech Republic ; Co-infection ; Male-killing bacteria ; Parasite
    Language English
    Dates of publication 2023-03
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 390885-9
    ISSN 1096-0805 ; 0022-2011
    ISSN (online) 1096-0805
    ISSN 0022-2011
    DOI 10.1016/j.jip.2023.107887
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 958: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  5. Article ; Online: Phylogeny of the New World Dysdercus (Insecta: Hemiptera: Pyrrhocoridae) and Evolution of their Colour Patterns.

    Zrzavý, Jan / Nedved, Oldrich

    Cladistics : the international journal of the Willi Hennig Society

    2021  Volume 13, Issue 1-2, Page(s) 109–123

    Abstract: Evolution of colour patterns is reconstructed in the case of the New World species of Dysdercus (Hemiptera: Pyrrhocoridae). The phylogenetic species concept was applied to this group, elevating five subspecific taxa to specific rank (D. capitatus, D. ... ...

    Abstract Evolution of colour patterns is reconstructed in the case of the New World species of Dysdercus (Hemiptera: Pyrrhocoridae). The phylogenetic species concept was applied to this group, elevating five subspecific taxa to specific rank (D. capitatus, D. discolor, D. fervidus, D. luteus, and D. neglectus), and the resulting 41 phylogenetic species were analysed cladistically. Using optimization methods, evolution of colour patterns of the group is hypothesized, and possible developmental mechanisms of colour-pattern evolutionary changes are inferred.
    Language English
    Publishing date 2021-12-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1462608-1
    ISSN 1096-0031 ; 0748-3007
    ISSN (online) 1096-0031
    ISSN 0748-3007
    DOI 10.1111/j.1096-0031.1997.tb00245.x
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  6. Article: Oenopia shirkuhensis

    Khormizi, Mehdi Zare / Nedvěd, Oldřich

    ZooKeys

    2020  Volume 915, Page(s) 107–116

    Abstract: ... Oenopia ... ...

    Abstract Oenopia shirkuhensis
    Language English
    Publishing date 2020-02-24
    Publishing country Bulgaria
    Document type Journal Article
    ZDB-ID 2445640-8
    ISSN 1313-2970 ; 1313-2989
    ISSN (online) 1313-2970
    ISSN 1313-2989
    DOI 10.3897/zookeys.915.46390
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  7. Article: Oenopia shirkuhensis sp. nov. (Coleoptera, Coccinellidae) from Iran mimicking Adalia bipunctata

    Khormizi, Mehdi Zare / Nedvěd, Oldřich

    ZooKeys. 2020 Feb. 24, v. 915

    2020  

    Abstract: Oenopia shirkuhensis sp. 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 ... ...

    Abstract Oenopia shirkuhensis sp. 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 and partly O. oncina are illustrated for comparison, and an identification key is provided.
    Keywords Adalia bipunctata ; color ; elytra ; taxonomic keys ; Iran
    Language English
    Dates of publication 2020-0224
    Size p. 107-116.
    Publishing place Pensoft Publishers
    Document type Article
    Note NAL-light
    ZDB-ID 2445640-8
    ISSN 1313-2970 ; 1313-2989
    ISSN (online) 1313-2970
    ISSN 1313-2989
    DOI 10.3897/zookeys.915.46390
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  8. Article ; Online: Fifty Shades of the Harlequin Ladybird and a Sexually Transmitted Fungus.

    Fiedler, Lukáš / Nedvěd, Oldřich

    Journal of insect science (Online)

    2019  Volume 19, Issue 6

    Abstract: 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 ... ...

    Abstract 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 = 1,102) were sampled during autumn migration, and then sexed, weighed, and screened for infection. Females were dissected for detection of sperm in their spermathecae. Ladybirds were sorted according to color form and absorbance spectrophotometry was used to quantify carotenoid contents in their elytra. In individuals of the nonmelanic succinea form, the degree of melanization was measured using digital photographs and putative age groups were estimated based on background color of elytra. Sexual differences in infection patterns indicated transmission during copulation: males were infected mostly on elytra and venter, and females had infection almost exclusively on elytra. Mated females had higher infection rate than virgins. There was no influence of genetic color form on the fungal infection. Putative age groups (visual sorting to yellow, orange, and red) correlated with fungal infection. Infected individuals had elevated elytral carotenoid levels in comparison to uninfected individuals, which could be explained by host age. Infection-free succinea beetles were extensively melanized because they emerged later in the season at lower temperatures which induced melanization. Overall, we highlight that H. axyridis is a multivoltine species whose age, if not taken into account in ecophysiological studies, might present a considerable confounding factor.
    MeSH term(s) Animals ; Ascomycota/physiology ; Carotenoids/metabolism ; Coleoptera/metabolism ; Coleoptera/microbiology ; Female ; Host-Pathogen Interactions ; Male ; Melanins/metabolism ; Models, Biological ; Pigmentation ; Sexual Behavior, Animal
    Chemical Substances Melanins ; Carotenoids (36-88-4)
    Language English
    Publishing date 2019-11-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2049098-7
    ISSN 1536-2442 ; 1536-2442
    ISSN (online) 1536-2442
    ISSN 1536-2442
    DOI 10.1093/jisesa/iez107
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  9. Article: Revision of the genus

    Szawaryn, Karol / Nedvěd, Oldřich / Biranvand, Amir / Czerwiński, Tomasz / Nattier, Romain

    ZooKeys

    2021  Volume 1043, Page(s) 61–85

    Abstract: ... The ... ...

    Abstract The genus
    Language English
    Publishing date 2021-06-11
    Publishing country Bulgaria
    Document type Journal Article
    ZDB-ID 2445640-8
    ISSN 1313-2970 ; 1313-2989
    ISSN (online) 1313-2970
    ISSN 1313-2989
    DOI 10.3897/zookeys.1043.65829
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Exploring Cold Hardiness within a Butterfly Clade: Supercooling Ability and Polyol Profiles in European Satyrinae.

    Vrba, Pavel / Sucháčková Bartoňová, Alena / Andres, Miloš / Nedvěd, Oldřich / Šimek, Petr / Konvička, Martin

    Insects

    2022  Volume 13, Issue 4

    Abstract: The cold hardiness of overwintering stages affects the distribution of temperate and cold-zone insects. Studies ... ...

    Abstract The cold hardiness of overwintering stages affects the distribution of temperate and cold-zone insects. Studies on
    Language English
    Publishing date 2022-04-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662247-6
    ISSN 2075-4450
    ISSN 2075-4450
    DOI 10.3390/insects13040369
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