scholarly journals Chemical defence in ladybird beetles (Coccinellidae). I. Distribution of coccinelline and individual variation in defence in 7-spot ladybirds (Coccinella septempunctata)

Chemoecology ◽  
1991 ◽  
Vol 2 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Graham J. Holloway ◽  
Peter W. de Jong ◽  
Paul M. Brakefield ◽  
Helene de Vos
Keyword(s):  
Individual Variation ◽  
Chemical Defence ◽  
Coccinella Septempunctata ◽  
Ladybird Beetles

The Coccinellidae (Coleoptera) from Fuerteventura, Canary Islands

Zootaxa ◽  
2019 ◽  
Vol 4646 (1) ◽  
pp. 101-123 ◽  
Author(s):  
JERZY ROMANOWSKI ◽  
PIOTR CERYNGIER ◽  
JAROSLAV VĚTROVEC ◽  
KAROL SZAWARYN
Keyword(s):  
Canary Islands ◽  
Coccinella Septempunctata ◽  
North African ◽  
The North ◽  
Ladybird Beetles

During this study, Coccinellidae were collected and observed at 25 sites located along the coast and inland of the island of Fuerteventura during 2016 and 2017. A total of 2825 Coccinellidae specimens belonging to 22 species was recorded, of which 11 species are newly recorded from Fuerteventura. In the case of three species taxonomical decisions are proposed. Scymnus incisus (Har. Lindberg, 1950) is transferred to the genus Nephus Mulsant and placed in the nominate subgenus as Nephus (Nephus) incisus (Har. Lindberg, 1950), comb. nov. Scymnus medanensis Eizaguirre, 2007, is redescribed and placed in the subgenus Pullus Mulsant. Coccinella algerica Kovář, 1977, is synonymized with Coccinella septempunctata Linnaeus, 1758, syn. nov. We propose retaining the taxonomic distinction of the North African and Canarian populations of this species as the subspecies Coccinella septempunctata algerica Kovář, stat. nov. Nephus peyerimhoffi (Sicard, 1923) is deleted from the list of ladybird beetles inhabiting the Canary Islands. 

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 The effect of surface anisotropy in the slippery zone of Nepenthes alata pitchers on beetle attachment

2011 ◽  
Vol 2 ◽  
pp. 302-310 ◽  
Author(s):  
Elena V Gorb ◽  
Stanislav N Gorb
Keyword(s):  
Coccinella Septempunctata ◽  
Carnivorous Plant ◽  
Surface Anisotropy ◽  
Anisotropic Properties ◽  
Surface Samples ◽  
Ladybird Beetles ◽  
Attachment Ability ◽  
Wax Crystals ◽  
Insect Attachment ◽  
Effect Of Surface

The slippery zone in pitchers of the carnivorous plant Nepenthes alata bears scattered prominent lunate cells and displays continuous epicuticular crystalline wax coverage. The aim of this study was to examine the influence of the surface anisotropy, caused by the shape of lunate cells, on insect attachment ability. Traction tests with ladybird beetles Coccinella septempunctata were performed in two types of experiments, where surface samples of (1) intact pitchers, (2) chemically de-waxed pitchers, and (3) their polymer replicas were placed horizontally. Beetle traction forces were measured when they walked on test surfaces in either an upward (towards the peristome) or downward (towards the pitcher bottom) direction, corresponding to the upright or inverted positions of the pitcher. On intact pitcher surfaces covered with both lunate cells and wax crystals, experiments showed significantly higher forces in the direction towards the pitcher bottom. To distinguish between the contributions, from claw interlocking and pad adhesion, to insect attachment on the pitcher surfaces, intact versus claw-ablated beetles were used in the second type of experiment. On both de-waxed plant samples and their replicas, intact insects generated much higher forces in the downward direction compared to the upward one, whereas clawless insects did not. These results led to the conclusion that, (i) due to the particular shape of lunate cells, the pitcher surface has anisotropic properties in terms of insect attachment, and (ii) claws were mainly responsible for attachment enhancement in the downward pitcher direction, since, in this direction, they could interlock with overhanging edges of lunate cells.

scholarly journals Surface roughness rather than surface chemistry essentially affects insect adhesion

2016 ◽  
Vol 7 ◽  
pp. 1471-1479 ◽  
Author(s):  
Matt W England ◽  
Tomoya Sato ◽  
Makoto Yagihashi ◽  
Atsushi Hozumi ◽  
Stanislav N Gorb ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Chemistry ◽  
Coccinella Septempunctata ◽  
Traction Force ◽  
Dominant Factor ◽  
Chemical Compositions ◽  
Specific Chemical ◽  
Chemical Surface ◽  
Ladybird Beetles ◽  
Attachment Ability

The attachment ability of ladybird beetles Coccinella septempunctata was systematically investigated on eight types of surface, each with different chemical and topographical properties. The results of traction force tests clearly demonstrated that chemical surface properties, such as static/dynamic de-wettability of water and oil caused by specific chemical compositions, had no significant effect on the attachment of the beetles. Surface roughness was found to be the dominant factor, strongly affecting the attachment ability of the beetles.

scholarly journals Use of Eelgrass, Zostera marina, Wrack by Three Species of Ladybird Beetles (Coleoptera: Coccinellidae) in Prince Edward Island

2004 ◽  
Vol 118 (2) ◽  
pp. 225 ◽  
Author(s):  
David J. Garbary ◽  
Sarah Fraser ◽  
Carrie Ferguson ◽  
Randolph F. Lauff
Keyword(s):  
Zostera Marina ◽  
Intertidal Zone ◽  
Prince Edward Island ◽  
High Tide ◽  
Coccinella Septempunctata ◽  
The Other ◽  
Terrestrial Vegetation ◽  
Green Point ◽  
Ladybird Beetles ◽  
Large Numbers

Large numbers of the introduced ladybird beetle, Coccinella septempunctata L., were present at Wood Islands and Green Point, Prince Edward Island, in wrack consisting primarily of Zostera marina L. (Eelgrass). The wrack occurred in a 0.5 to 1.0 m band parallel to the shore, and was from five to 25 cm thick. The other ladybirds, Propylea quatuordecimpunctata (L.), an introduced coccinellid also found in high numbers, and an individual of the native Hippodamia tredecimpunctata (Say) were found only at Wood Islands. At both sites the ladybird beetles occurred in the mid-intertidal zone along at least 100 m of shoreline, and were absent to rare on the terrestrial vegetation above the high tide mark. At four of the other eight sites surveyed, occasional individuals were present in the wrack, but they were no more abundant than could be observed on landward vegetation. Mean densities of C. septempunctata at the two primary sites were 52 m-2 (Green Point) and 410 m-2 (Wood Islands).

scholarly journals DIVERSITY OF PREDACEOUS COCCINELLID BEETLES (COLEOPTERA: COCCINELLIDAE) IN UTTARAKHAND, NORTH INDIA

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Ahmad Pervez ◽  
Meena Yadav ◽  
Moina Khan
Keyword(s):  
Insect Pests ◽  
Coccinella Septempunctata ◽  
North India ◽  
Ladybird Beetles ◽  
Propylea Dissecta ◽  
Ecological Importance ◽  
Number Of Individuals ◽  
First Time ◽  
Coccinella Transversalis ◽  
Micraspis Discolor

A field survey was conducted to explore the diversity of predaceous ladybird beetles (Coleoptera: Coccinellidae) by sampling adults and larvae from five geographical habitats of Uttarakhand, North India. As a result, eighteen predaceous ladybird beetle species were identified belonging to 15 genera and 3 subfamilies: Chilocorinae, Coccinellinae, and Scymninae. These species were: Platynaspis saundersi, Adalia hexaspilota, Alloneda dodecaspilota, Calvia albida, Menochilus sexmaculatus, Coccinella septempunctata, Coccinella transversalis, Harmonia eucharis, Harmonia sedecimnotata; Hippodamia variegata, Illeis cincta, Illeis confusa, Micraspis discolor, Oenopia sauzeti, Propylea dissecta; Propylea luteopustulata; Palaeoneda auriculata and Scymnus posticalis. Of these, six species ladybird beetles are the first time reported from Uttarakhand. Their distinctive characters, distribution, host plant-prey range, active period, and ecological importance have been described. A few of these species may be potentially utilized as biological agents to control many phytophagous insect pests of agriculture and horticulture crops. A disparity was observed in the ladybird-abundance, as both the number of individuals of ladybirds and their frequency in the population differed significantly. The dominance of a few ladybird beetles, particularly C. septempunctata, M. sexmaculatus, C. transversalis and H. variegata was confirmed by the low value of Simpson’s Dominance Index (0.1903) further indicating the disparity in the populations of different ladybird species in a community

scholarly journals Winter and early spring assemblages of ladybird beetles (Coleoptera: Coccinellidae) in two forest habitats in suburban area of Warsaw, central Poland

2016 ◽  
Vol 14 (3) ◽  
pp. 115-129 ◽  
Author(s):  
Karolina Bodzon ◽  
Piotr Ceryngier
Keyword(s):  
Deciduous Forest ◽  
Mixed Forest ◽  
Coccinella Septempunctata ◽  
Forest Litter ◽  
Early Spring ◽  
The North ◽  
Ladybird Beetles ◽  
Clitostethus Arcuatus ◽  
North Western ◽  
Forest Habitats

In March and April of 2014 and 2015, overwintering and post-overwintering assemblages of ladybird beetles were investigated in deciduous (Tilio-Carpinetum) and mixed forest (Querco roboris-Pinetum) patches in a forest complex on the north-western periphery of Warsaw. March samples were collected by sifting forest litter with an entomological sieve, while in April, ladybirds were collected from the vegetation using sweeping net and beating sheet. In both years, mean densities of ladybirds found in March in the two forest types were low, not exceeding 2 individuals/m2. Seven ladybird species were found overwintering in the litter of the deciduous forest and four in that of the mixed forest. Propylea quatuordecimpunctata was the most abundant in both habitats in 2014, while in 2015 in the litter of the deciduous forest Vibidia duodecimguttata predominated. In April, 15 species were recorded in the deciduous forest and 7 in the mixed forest. Scymnus ferrugatus predominated in the former plant community and P. quatuordecimpunctata and Coccinella septempunctata in the latter. Several of the recorded species, such as Clitostethus arcuatus, Scymnus femoralis and S. abietis, have rarely been reported from Poland.

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