EJE, vol. 99 (2002), issue 4

Effects of temperature and genetic stress on life history and fluctuating wing asymmetry in Culex pipiens mosquitoes


Eur. J. Entomol. 99 (4): 405-412, 2002 | DOI: 10.14411/eje.2002.050

Fluctuating asymmetry (FA) of bilaterally symmetrical organisms has been introduced as a promising indicator of environmental stress. Stress factors reported to contribute to developmental stability include inbreeding and the presence of resistance genes. In the current study we examined the effect of stress derived from high developmental temperatures, resistance genes and low genetic variation on life history variables and wing FA in Culex pipiens mosquitoes. Three strains were compared: two inbred laboratory strains sharing a similar genetic background but differing in that one strain contained organophosphate (OP) resistance genes, and a...

Developmental changes in the ability to synthesize juvenile hormone in vitro by corpora allata from the Eri silkworm, Samia cynthia ricini (Lepidoptera: Saturniidae)

Sheng LI, Rong-Jing JIANG, Mei-Xun CAO

Eur. J. Entomol. 99 (4): 413-419, 2002 | DOI: 10.14411/eje.2002.051

A radiochemical assay (RCA) has been used for the measurement of juvenile hormone (JH) synthesis in vitro by corpora allata (CA) from the Eri silkworm, Samia cynthia ricini. Using CA from newly emerged female adults for the bioassay, the most suitable incubation conditions were determined. A high rate of JH synthesis was found in medium TC199 at pH 6.5, 30°C and 4 mM Ca2+. The time course of JH synthesis showed a steady decrease during the first 6 hours of incubation.
Under optimal incubation conditions, CA from the 4th and 5th larval instars, pupae and adults were used for measuring JH synthesis in vitro. The highest rates of...

Thermoperiodic effects on diapause of Sesamia nonagrioides (Lepidoptera: Noctuidae)


Eur. J. Entomol. 99 (4): 421-425, 2002 | DOI: 10.14411/eje.2002.052

The role of the thermophotoperiod on larval diapause induction and development of Sesamia nonagrioides was investigated under laboratory conditions. The incidences of diapause by TC 12 : 12 thermoperiods under DD, in which the thermophase was 30°C and cryophases varied from 10 to 25°C, were compared to the effects of thermophotoperiods with the same configuration. Higher incidences of diapause were recorded when larvae were exposed to thermophotoperiods with cryophases of 15-25°C, than under thermoperiods under constant darkness. In addition, larvae exhibited significantly lower percentages of diapause when exposed to cryophases < 15°C under...

BOOK REVIEW: Nilsson A.N.: Dytiscidae (Coleoptera).


Eur. J. Entomol. 99 (4): 426, 2002 | DOI: 10.14411/eje.2002.053

In: World Catalogue of Insects, Volume 3. Apollo Books, Stenstrup, Denmark, 2001, 395 pp.

Interaction of exogenous factors (light and temperature) in their influence on the daily pattern of adult eclosion in Trichogramma embryophagum (Hymenoptera: Trichogrammatidae)

Svetlana G. KARPOVA, Sergey Ya. REZNIK

Eur. J. Entomol. 99 (4): 427-436, 2002 | DOI: 10.14411/eje.2002.054

A comparative study of the direct influence of single, non-repetitive changes of light and/or temperature on the daily pattern of adult eclosion was conducted in laboratory conditions with the egg parasitoid, Trichogramma embryophagum (Hartig). In all experiments, the entire development occurred under the same regimen (12L : 12D, 20°C). However, just in the day when records of eclosion were made, the time of light-on was changed (from the total absence of a dark period to the 12-h-long scotophase). In addition, in different treatments of each experiment a thermophase (30°C during 2 or 4 hours) was applied in various positions relative to light-on....

Are differences in hydrocarbon profiles able to mediate strain recognition in German cockroaches (Dictyoptera: Blattellidae)?


Eur. J. Entomol. 99 (4): 437-444, 2002 | DOI: 10.14411/eje.2002.055

Previous behavioural tests indicated that strain recognition and aggregation behaviour could be induced by cuticular hydrocarbons. The aim of this study was to document and to compare cuticular hydrocarbon profiles between different strains of Blattella germanica (L.) (Dictyoptera: Blattellidae) and to relate variations in the general profile of cuticular hydrocarbons with strain discrimination during behavioural tests. Profiles of different strains were remarkably similar qualitatively but presented slight quantitative differences over the 25 identified components. Important differences were observed in dimethylalkane components and these allowed...

The role of plant odours in the leafminer Liriomyza sativae (Diptera: Agromyzidae) and its parasitoid Diglyphus isaea (Hymenoptera: Eulophidae): Orientation towards the host habitat

Yun Xian ZHAO, Le KANG

Eur. J. Entomol. 99 (4): 445-450, 2002 | DOI: 10.14411/eje.2002.056

Electroantennogram responses of the polyphagous leafminer Liriomyza sativae and its generalist parasitoid Diglyphus isaea to host and non-host plant odours of L. sativae were investigated. The odours of healthy leaves can elicit distinct EAG responses in L. sativae. The EAG responses to the odours of the host plants, bean and tomato, were stronger than to non-host plants, Chinese rose and morning glory. Neither healthy host nor non-host plants of the leafminer elicited distinctive EAG responses in the parasitoid, D. isaea. Odours of physically damaged leaves, no matter whether of host or non-host plants, increased...

Mating behaviour of Aphidius ervi (Hymenoptera: Braconidae): The role of antennae

Donatella BATTAGLIA, Nunzio ISIDORO, Roberto ROMANI, Ferdinando BIN, Francesco PENNACHIO

Eur. J. Entomol. 99 (4): 451-456, 2002 | DOI: 10.14411/eje.2002.057

In the mating behaviour of Aphidius ervi Haliday the antennae play a pivotal role in partner recognition and acceptance. Mating failure was always observed when antennal contact was experimentally prevented. The male of A. ervi has filiform antennae, consisting of scape, pedicel and 18-20 cylindrical antennomeres (flagellar segments), which bear numerous types of sensory structures and, interspersed among the multiporous plate sensilla, especially on the 1th and 2nd flagellar segments, scattered pores. A secretion oozes from these pores in virgin males exposed to conspecific females. Transmission electron microscopy revealed that these...

Impact of the arrival of Harmonia axyridis on adults of Coccinella septempunctata and Coleomegilla maculata (Coleoptera: Coccinellidae)

Éric LUCAS, Isabelle GAGNÉ, Daniel CODERRE

Eur. J. Entomol. 99 (4): 457-463, 2002 | DOI: 10.14411/eje.2002.058

The impact of the arrival of the exotic coccinellid Harmonia axyridis on the biological control and dispersion of apple mites and aphids, and on the vertical distribution of the established coccinellids Coccinella septempunctata and Coleomegilla maculata have been studied. Assemblages of adults of the three coccinellid species were tested on apple saplings and on apple trees against Aphis citricola and Tetranychus urticae. The presence or substitution of adults of H. axyridis for adults of C. maculata or C. septempunctata did not reduce the predation impact on mite or aphid prey. H....

BOOK REVIEW: Russell E.: War and Nature. Fighting Humans and Insects with Chemicals from World War I to "Silent Spring".


Eur. J. Entomol. 99 (4): 464, 2002 | DOI: 10.14411/eje.2002.059

Cambridge University Press, Cambridge, UK, 2001, 315 pp.

The reproductive behaviour of an aphidophagous ladybeetle, Coccinella septempunctata (Coleoptera: Coccinellidae)


Eur. J. Entomol. 99 (4): 465-470, 2002 | DOI: 10.14411/eje.2002.060

The reproductive behaviour of a ladybeetle, Coccinella septempunctata was studied in detail. Males became sexually mature within 8.8 ± 0.3 days at 27°C, while females took 11.2 ± 0.4 days. Males exhibited courtship display in five steps: approach, watch, examine, mount and copulatory attempt. A prominent rejection display was shown by certain females who had not matured sexually, had recently mated or were about to oviposit. Males appeared to recognize females through chemical and some visual cues, such as size and body shape, with the chemical cues possibly playing a more significant role. Multiple matings took place within the...

Persistence of deterrent larval tracks in Coccinella septempunctata, Cycloneda limbifer and Semiadalia undecimnotata (Coleoptera: Coccinellidae)

Zdeněk RŮ®IČKA

Eur. J. Entomol. 99 (4): 471-475, 2002 | DOI: 10.14411/eje.2002.061

The persistence of oviposition-deterring effects of coccinellid and chrysopid larval tracks on females of three aphidophagous coccinellid species was compared. One month old tracks of first instars of the coccinellid Cycloneda limbifer Casey deterred conspecific females from oviposition in choice tests with clean and contaminated substrates. Intraspecific effect of larval tracks in Semiadalia undecimnotata Schneider was statistically significant after 10 days. Although fresh tracks of conspecific first instars effectively deterred females in both tested populations of Coccinella septempunctata L., deterrent effects disappeared...

BOOK REVIEW: Denlinger D.L., Giebultowicz J.M., Saunders D.S. (eds) Insect Timing: Circadian Rhythmicity to Seasonality.


Eur. J. Entomol. 99 (4): 476, 2002 | DOI: 10.14411/eje.2002.062

Elsevier, Amsterdam, 2001, 234 pp.

Spatial and ecological isolation in cicadas: First data from Tibicina (Hemiptera: Cicadoidea) in France

Jérôme SUEUR, Stéphane PUISSANT

Eur. J. Entomol. 99 (4): 477-484, 2002 | DOI: 10.14411/eje.2002.063

The seven taxa of the cicada genus Tibicina (T.corsica corsica, T. corsica fairmairei, T. garricola, T. haematodes, T. nigronervosa, T. quadrisignata, T. tomentosa) which occur in continental France and Corsica were investigated. Extrinsic factors (geographical barriers) and factors intrinsic to the ecology of species were considered in an effort to understand the biogeography of Tibicina. Three patterns related to intrinsic factors were recognised: (1) pairs of taxa with sympatric distributions but with divergent habitat preferences; (2) pairs of taxa with sympatric distributions and similar...

A new libelluloid dragonfly from late Paleocene deposits in Argentina (Odonata: Italoansida)


Eur. J. Entomol. 99 (4): 485-489, 2002 | DOI: 10.14411/eje.2002.064

A new genus and species of "libelluloid" dragonfly, Jujusia maizgorda gen. n., sp. n., of the clade Italoansida Bechly, 1996, from the late Paleocene, Maíz Gordo Formation, north-western Argentina, is described. Its phylogenetic relationships within the clade Cavilabiata Bechly, 1996 are discussed.

BOOK REVIEW: Bu W. & Zheng L. (Cheng Loyi): Hemiptera: Lasiochilidae, Lyctocoridae, Anthocoridae.


Eur. J. Entomol. 99 (4): 490, 2002 | DOI: 10.14411/eje.2002.065

[in Chinese; English Summary.] Fauna Sinica, Insecta 24: 267 pp., 362 Figs.

Stored product psocids (Psocoptera): External morphology of eggs


Eur. J. Entomol. 99 (4): 491-503, 2002 | DOI: 10.14411/eje.2002.066

Eggs of thirteen synanthrophic psocids of the families Trogiidae, Psyllipsocidae, Liposcelididae and Lachesillidae, commonly occurring in stored products in Europe, are described. Descriptions are based on overall appearance during embryogenesis, size and surface sculpturing. Morphological details are illustrated using scanning electron micrographs. A key for distinguishing eggs at both the generic and species level is provided. The presence or absence of a micropyle and aeropyle is discussed.

Revision of the genera Nemadiopsis and Falkonemadus (Coleoptera: Leiodidae: Cholevinae)


Eur. J. Entomol. 99 (4): 505-521, 2002 | DOI: 10.14411/eje.2002.067

The genera Nemadiopsis Jeannel, 1936 and Falkonemadus Szymczakowski, 1961 are redescribed and revised. The taxonomic position of Nemadiopsis and Falkonemadus is analy sed using features of male and female genitalia. Two new subgenera, Nemadiopsicus subgen. n. and Nemadiopsella subgen. n. and five new species, Nemadiopsis (Nemadiopsis) grossicornis sp. n., N. (Nemadiopsicus) rotundatus sp. n., N. (Nemadiopsella) curvipes sp. n., Falkonemadus similaris sp. n. and F. avicularis sp. n. are described. Keys to the subgenera...

Description of the first-instar larva of Geocharidius (Coleoptera: Carabidae: Trechitae) with a discussion of the phylogeny of the subtribe Anillina


Eur. J. Entomol. 99 (4): 523-527, 2002 | DOI: 10.14411/eje.2002.068

This paper describes the first-instar larva of Geocharidius Jeannel, a species from Mexico, which is the second record of an Anillina (Coleoptera: Carabidae: Trechitae) larva; previously described was a species of the European genus Typhlocharis. Larvae of these two genera share ten synapomorphic characters, which support the monophyletic origin of Anillina. Sister-group relationships of Anillina with Tachyina + Xystosomina are proposed on the basis of three shared larval synapomorphies: seta LA5 of ligula absent; coronal suture in first-instar larvae very short or absent; second- third-instar larvae have none or one secondary seta on...

BOOK REVIEW: Wheeler A.G. Jr: Biology of the Plant Bugs (Hemiptera: Miridae).


Eur. J. Entomol. 99 (4): 528, 2002 | DOI: 10.14411/eje.2002.069

Pests, Predators, Opportunists. xv + 507 pp.

Taxonomic changes in the genus Dyscia (Lepidoptera: Geometridae: Ennominae)


Eur. J. Entomol. 99 (4): 529-541, 2002 | DOI: 10.14411/eje.2002.070

This paper presents a revision of the genus Dyscia Hübner, [1825] (Lepidoptera, Geometridae: Ennominae). Examination of types and additional material for most described taxa has resulted in several new synonyms: Dyscia ilivolans Wehrli, 1953 syn. n. and Dyscia duanjiao Yang, 1978 syn. n. are new synonyms of Dyscia fagaria (Thunberg, 1784); Dyscia karsholti Wiltshire, 1991 syn. n. is a new synonym of Dyscia galactaria Turati, 1934; Dyscia dagestana Wehrli, 1934 syn. n. is a new synonym of Dyscia malatyana Wehrli, 1934, and Dyscia rjabovi Wardikjan, 1957 syn. n. is a new synonym...

The Cixiidae (Hemiptera: Fulgoromorpha) of the Mascarenes islands and Madagascar. Endemism and description of new taxa from Réunion with notes on their host plants


Eur. J. Entomol. 99 (4): 543-555, 2002 | DOI: 10.14411/eje.2002.071

Two new species (Hemiptera, Fulgoromorpha, Cixiidae) included in a new genus, Meenocixius gen. n., and associated with Acanthophœnix rubra (Bory) H. Wendl. (Arecaceae) are described from the island of La Réunion: M. bebourensis sp. n. and M. virescens sp. n. This genus shows several autapomorphies in its tegmina venation, very particular within the Fulgoromorpha. Borbonomyndus gen. n., is proposed for another new species, B. pandanicola sp. n. associated with Pandanus purpurascens Thouars (Pandanaceae), and B. pallidus (Synave), previously described as a member of the genus Eumyndus...

Quantitative changes in protein, glycogen and fat content in the eggs of the locusts, Locusta migratoria migratorioides and Schistocerca gregaria (Orthoptera), during embryogenesis

Václav NĚMEC

Eur. J. Entomol. 99 (4): 557-559, 2002 | DOI: 10.14411/eje.2002.072

Changes in the content of protein, glycogen, neutral lipids and sterols were investigated in locust eggs from oviposition until larval hatching. The content of all of these nutritional reserves was higher in the eggs of S. gregaria because of their larger size, although relative changes in utilization or synthesis of these materials during embryogenesis showed a more or less parallel course. The amount of protein increased progressively during embryogenesis, while glycogen and neutral lipids were successively metabolized or utilized for development of the embryo. There appeared significant relative differences in the way of utilizing energetic...

BOOK REVIEW: Barth Friedrich G.: A Spider's World: Senses and Behaviour.


Eur. J. Entomol. 99 (4): 560, 2002 | DOI: 10.14411/eje.2002.073

(Translated by M.A. Biederman-Thorson) Springer Verlag, Berlin, Heidelberg, New York, 2001, 394 pp.,

Influence of prey host plant on a generalist aphidophagous predator: Episyrphus balteatus (Diptera: Syrphidae)

Nicolas VANHAELEN, Charles GASPAR, Frédéric FRANCIS

Eur. J. Entomol. 99 (4): 561-564, 2002 | DOI: 10.14411/eje.2002.074

Secondary plant metabolites (allelochemicals) play a major role in plant-insect interactions. Glucosinolates (GLS) and their degradation products from Brassica species are attractants and feeding stimulants for Brassicaceae specialist insects but are generally repellent and toxic for generalist herbivores. The impact of these compounds on crucifer specialist insects are well known but their effect on generalist predators is still not well documented. The influence of the prey's host plant on both development and reproduction of an aphidophagous beneficial, the hoverfly Episyrphus balteatus, was determined using the cabbage aphid, Brevicoryne...

The ant-associations and diet of the ladybird Coccinella magnifica (Coleoptera: Coccinellidae)

John J. SLOGGETT, Wolfgang VÖLKL, Werner SCHULZE, J. Hinrich G.v.d. SCHULENBURG, Michael E.N. MAJERUS

Eur. J. Entomol. 99 (4): 565-569, 2002 | DOI: 10.14411/eje.2002.075

The ladybird Coccinella magnifica is typically considered to be myrmecophilous, and primarily associated with the Formica rufa group of wood ants. It is regularly associated with ants of the F. rufa group in north-western Europe. The very limited data on the habitat preference of C. magnifica in the southern and eastern parts of its range indicate that its ant-associations change and that it may even be non-myrmecophilous in this region. C. magnifica might consist of geographically restricted species or semispecies, on the basis of its geographical variation in ant-association. Laboratory and field observations on...

BOOK REVIEW: Gordh G. (with assistance by D. Headrick): A Dictionary of Entomology.


Eur. J. Entomol. 99 (4): 569, 2002 | DOI: 10.14411/eje.2002.076

CABI Publishing, Wallingford, U.K., 2001. ix + 1032 pp.