scholarly journals Voracité comparative de trois coccinelles prédatrices contre le tétranyque rouge du pommier [Acarina : Tetranychidae]

2005 ◽  
Vol 78 (3) ◽  
pp. 117-123 ◽  
Author(s):  
É. Lucas ◽  
S. Lapalme ◽  
D. Coderre
Keyword(s):  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Panonychus Ulmi ◽  
Propylea Quatuordecimpunctata ◽  
Comme Agent

La voracité de la coccinelle à sept points, Coccinella septempunctata, de la coccinelle à quatorze points, Propylea quatuordecimpunctata, et de la coccinelle orientale, Harmonia axyridis, [Coleoptera : Coccinellidae] a été évaluée en laboratoire face au tétranyque rouge du pommier, Panonychus ulmi [Acarina : Tetranychidae]. Les trois espèces ont consommé le tétranyque rouge. H. axyridis était significativement plus vorace que les autres espèces et présente le potentiel le plus élevé comme ennemi naturel du tétranyque. Malgré sa grande taille, C. septempunctata possédait une voracité très faible, ce qui confirme son inefficacité comme agent de lutte face aux acariens phytophages.

scholarly journals Life table parameters of the aphid predators Coccinella septempunctata, Ceratomegilla undecimnotata and Propylea quatuordecimpunctata (Coleoptera: Coccinellidae)

2008 ◽  
Vol 105 (3) ◽  
pp. 427-430 ◽  
Author(s):  
Dimitrios C. KONTODIMAS ◽  
Panagiotis G. MILONAS ◽  
George J. STATHAS ◽  
Nickolaos E. PAPANIKOLAOU ◽  
Anna SKOURTI ◽  
...  
Keyword(s):  
Life Table ◽  
Coccinella Septempunctata ◽  
Life Table Parameters ◽  
Propylea Quatuordecimpunctata ◽  
Aphid Predators

scholarly journals A switch from constitutive chemical defence to inducible innate immune responses in the invasive ladybird Harmonia axyridis

2013 ◽  
Vol 9 (3) ◽  
pp. 20130006 ◽  
Author(s):  
Henrike Schmidtberg ◽  
Christian Röhrich ◽  
Heiko Vogel ◽  
Andreas Vilcinskas
Keyword(s):  
Immune Responses ◽  
Antimicrobial Peptides ◽  
Harmonia Axyridis ◽  
Chemical Defence ◽  
Coccinella Septempunctata ◽  
Invasion Biology ◽  
Innate Immune ◽  
Innate Immune Responses ◽  
Simultaneous Synthesis ◽  
Related Proteins

The harlequin ladybird, Harmonia axyridis , has emerged as a model species for invasion biology, reflecting its remarkable capacity to outcompete native ladybird species when introduced into new habitats. This ability may be associated with its prominent resistance to pathogens and intraguild predation. We recently showed that the constitutive antibacterial activity present in the haemolymph of H. axyridis beetles can be attributed to the chemical defence compound harmonine. Here, we demonstrate that H. axyridis differs from other insects, including the native ladybird Coccinella septempunctata, by reducing rather than increasing the antimicrobial activity of its haemolymph following the injection of bacteria. However, both species produce new or more abundant proteins in the haemolymph, indicating that bacterial challenge induces innate immune responses associated with the synthesis of immunity-related proteins. Our results suggest that H. axyridis beetles can switch from constitutive chemical defence to inducible innate immune responses, supporting hypothesis that inducible antimicrobial peptides protect host beetles against pathogens that survive constitutive defences. These alternative antimicrobial defence mechanisms may reflect a trade-off resulting from fitness-related costs associated with the simultaneous synthesis of harmonine and antimicrobial peptides/proteins.

scholarly journals Competition for Aphid Prey between Different Lady Beetle Species in a Laboratory Arena

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Christy Leppanen ◽  
Andrei Alyokhin ◽  
Serena Gross
Keyword(s):  
Native Species ◽  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Lady Beetle ◽  
Macrosiphum Euphorbiae ◽  
Beetle Species ◽  
Lady Beetles ◽  
Aphid Prey ◽  
Aphid Consumption ◽  
Asymmetric Interactions

Direct competition for aphid prey (Hemiptera: Aphididae) was evaluated between and among several lady beetle species (Coleoptera: Coccinellidae). The behavior of three native (Coccinella trifasciata, Coleomegilla maculata,andHippodamia convergens) and four nonnative (Coccinella septempunctata,Harmonia axyridis,Hippodamia variegata,andPropylea quatuordecimpunctata) lady beetles was observed in laboratory arenas. The beetles were kept alone, paired with conspecifics or paired with heterospecifics, and presented with potato aphids (Macrosiphum euphorbiae).Harmonia axyridiswas the most successful aphid predator in our study, being able to find aphids more quickly and consume more of them compared to most other lady beetle species. It was also by far the most aggressive of the tested species.Coccinella septempunctata, C. trifasciata,andC. maculatagenerally followedH. axyridisin aphid consumption. Prey discovery, consumption, and aggressive behaviors were dependent on which species were present in the arena. Except for the generally superiorH. axyridis, there was no obvious dominance hierarchy among the other tested species and no dichotomy between the native and non-native species. Asymmetric interactions between lady beetle species may affect their abilities to coexist in the same habitat.

Interactions between the fungal pathogen Beauveria bassiana and three species of coccinellid: Harmonia axyridis, Coccinella septempunctata and Adalia bipunctata

BioControl ◽  
2007 ◽  
Vol 53 (1) ◽  
pp. 265-276 ◽  
Author(s):  
Helen Elizabeth Roy ◽  
Peter M. J. Brown ◽  
Peter Rothery ◽  
Remy L. Ware ◽  
Michael E. N. Majerus
Keyword(s):  
Beauveria Bassiana ◽  
Fungal Pathogen ◽  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Adalia Bipunctata

scholarly journals Effect of Ingestion Exposure of Selected Insecticides on Coccinella septempunctata and Harmonia axyridis (Coleoptera: Coccinellidae)

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 434
Author(s):  
Jacek Piotr Twardowski ◽  
Michał Hurej ◽  
Kamila Twardowska
Keyword(s):  
Dose Rate ◽  
Acyrthosiphon Pisum ◽  
Harmonia Axyridis ◽  
Developmental Stages ◽  
Coccinella Septempunctata ◽  
Apparent Difference ◽  
Full Field ◽  
Species Response ◽  
Lambda Cyhalothrin ◽  
Almost All

The sensitivity to thiacloprid and lambda-cyhalothrin ingested from prey organisms was studied in Coccinella septempunctata and Harmonia axyridis, since the effect of ingestion exposure to these insecticides is unknown in these species. All developmental stages of the ladybirds were fed on Acyrthosiphon pisum treated with half or full field rate of the insecticides. Almost all instars were killed within 3 h of the start of ingestion of lambda-cyhalotrin-treated prey. The action of thiacloprid was more extended in time in both coccinellids and more variable between their instars. Reducing the field rate of lambda-cyhalothrin seems to have no practical value for the survival of either of the coccinellid species. Contrastingly, using half instead of the full field rate of thiacloprid may enhance the chances of survival in L1, L2, and L4 larvae of both species. Of all developmental stages tested, the survival dynamics of the adults of either species are closest to one another, whereas the apparent difference in the species response to the dose rate of thiacloprid was found in the L4 stage.

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