scholarly journals A Survey on the Late Spring Population of Predatory Lady-Birds of Aphids, Coccinella septempunctata bruckii and Harmonia axyridis, in Rape-Fields

1959 ◽  
Vol 3 (3) ◽  
pp. 213-215
Author(s):  
Hidetoshi OKAMOTO
Keyword(s):  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Late Spring

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.

Assessment of legume and nonlegume ground covers on Coleoptera: Coccinellidae density for low-input pecan management

1998 ◽  
Vol 13 (3) ◽  
pp. 111-123 ◽  
Author(s):  
Natasha R. Rice ◽  
Michael W. Smith ◽  
Raymond D. Eikenbary ◽  
Don Arnold ◽  
W. Louis Tedders ◽  
...  
Keyword(s):  
Cover Crop ◽  
Dominant Species ◽  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Ground Cover ◽  
Tree Canopy ◽  
Hairy Vetch ◽  
Crimson Clover ◽  
Aphid Predators ◽  
Legume Cover Crop

AbstractAn annual legume cover crop was evaluated in pecan orchards to increase coccinellids that would reduce pecan aphids. Treatments were a ‘Dixie’ crimson clover and hairy vetch mixture and a grass sod. Coccinellids were abundant on the legume ground covers, but coccinellid density in the tree canopy was rarely affected by ground cover treatment. There were substantial differences between the coccinellid species collected from the legumes and from the trees. In Oklahoma, Olla v-nigrum (Mulsant) and Cycloneda munda (Say) were the main species in the trees, while Hippodamia convergens Guerin, Coccinella septempunctata L, and Coleomegilla maculata lengi Timberlake were dominant species in the legumes. In Georgia, Harmonia axyridis (Pallas) was the dominant species in the trees, and C. septempunctata in the legumes. Pecan aphids at two Oklahoma sites usually were not affected by cover crop treatment, but at the Georgia site, early-season aphids frequently were lower with a legume cover crop than with a grass sod. The accumulated effect of all aphid predators and parasitoids attracted to the legume aphids may have reduced the density of the pecan aphid.

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