EJE, vol. 98 (2001), issue 1
Small aquatic and ripicolous bugs (Heteroptera: Nepomorpha) as predators and prey: The question of economic importance
Eur. J. Entomol. 98 (1): 1-12, 2001 | DOI: 10.14411/eje.2001.001
Some features of the biology and feeding relationships of small waterbugs (Notonectidae, Corixidae, Pleidae, Helotrephidae, Aphelocheiridae) and ripicolous bugs (Gelastocoridae, Ochteridae) are reviewed. Individual families are discussed as predators or as prey of other animals. Special attention is given to characteristics and relationships that affect human beings directly or indirectly. The most important relationships from the economic point of view are: bugs and blood-sucking Diptera, bugs and fish, bugs and some endangered or protected amphibians and water birds. Of less importance is the occasional use of some aquatic bugs as saprobity bioindicators....
The effect of heat stress on the activity of A1 and A2 neurosecretory neurons of Morimus funereus (Coleoptera: Cerambycidae) larvae
Snežana LEKOVIĆ, Jelica LAZAREVIĆ, Vera NENADOVIĆ, Jelisaveta IVANOVIĆ
Eur. J. Entomol. 98 (1): 13-18, 2001 | DOI: 10.14411/eje.2001.002
A study on the effect of heat stress on the activity of the medial A1 and A2 neurosecretory neurons (NSN), and the activity of midgut a-amylase and protease was performed on the fifth larval instar of Morimus funereus. Exposure of the larvae to 35°C led to a decrease in the activity of both A1 and A2 NSN, the former being more marked than the latter. These neurons responded differently to heat stress in terms of neurosecretory material synthesis and release. The changes in the size of both A1 NSN and their nuclei and protease activity in the larvae exposed to elevated temperature were significantly correlated, which suggests that A1 NSN play...
Sexual activity in macropterous and brachypterous males of a flightless bug, Pyrrhocoris apterus (Heteroptera)
Radomír SOCHA, Jan ŠULA, Dalibor KODRÍK
Eur. J. Entomol. 98 (1): 19-24, 2001 | DOI: 10.14411/eje.2001.003
The long-winged (macropterous) and short-winged (brachypterous) adult males of Pyrrhocoris apterus (L.) from temperate (Czech Republic) and Mediterranean (Israel) populations were analysed for the sexual activity and the functional activity of their accessory glands. The sexual activity of the males reared either under long-day (18L : 6D) or short-day (12L : 12D) conditions was determined by their capability to mate with 5-day-old reproductive females of the brachypterous morph and to fertilize the eggs. The functional activity of accessory glands was characterized by the presence of a specific immuno-marker. Sexual activity of fasting...
Wolbachia injection from usual to naive host in Drosophila simulans (Diptera: Drosophilidae)
Denis POINSOT, Herve MERÇOT
Eur. J. Entomol. 98 (1): 25-30, 2001 | DOI: 10.14411/eje.2001.004
Wolbachia pipientis (Hertig) (Rickettsiaceae) is an endocellular bacterium infecting numerous species of arthropods. The bacterium is harboured by males and females but is only transmitted maternally because spermatocytes shed their Wolbachia during maturation. The presence of this endosymbiont can lead to feminisation of the host, parthenogenesis, male-killing or reproductive incompatibility called cytoplasmic incompatibility (CI). Although Wolbachia transmission is exclusively maternal, phylogenetic evidence indicates that very rare inter-species transmission events have taken place. Horizontal transmission is possible in the...
Effects of plant tissue factors on the acceptance of four greenhouse vegetable host plants by the greenhouse whitefly: an Electrical Penetration Graph (EPG) study
Hong LEI, Joop C. VAN LENTEREN, Ru M. XU
Eur. J. Entomol. 98 (1): 31-36, 2001 | DOI: 10.14411/eje.2001.005
A combination of biological control and host-plant resistance is needed to control greenhouse whitefly, Trialeurodes vaporariorum (Westwood). The high level of susceptibility of several host plants to whitefly, based on their performance on these plants, is well documented. These studies only provide information on the overall host-plant acceptance by whiteflies. Here, we use a method that allows an examination of the different tissue layers in the overall acceptance. The effects of plant tissue factors on whitefly probing profiles were monitored using the electrical penetration graph (EPG) method. The EPGs of whitefly originating from a culture...
Patterns of attack by herbivores on the tropical shrub Bauhinia brevipes (Leguminosae): Vigour or chance?
Tatiana Garabini CORNELISSEN, G. Wilson FERNANDES
Eur. J. Entomol. 98 (1): 37-40, 2001 | DOI: 10.14411/eje.2001.006
The plant vigour hypothesis (PVH) predicts that females of galling insects preferentially oviposit on the most vigorous plants or plant modules, where their offspring's performance is highest. In the years 1995 to 1998, we evaluated the responses of species of two different guilds, two chewing species, Pantomorus sp. and Naupactus lar (Coleoptera: Curculionidae) and one galling species, Contarinia sp. (Diptera: Cecidomyiidae), to the length of shoots that were assumed to show the vigour of the tropical shrub Bauhinia brevipes (Leguminosae). The abundance of the chewing herbivores was not influenced by shoot length,...
Reproduction and immature development of Hyssopus pallidus (Hymenoptera: Eulophidae), an ectoparasitoid of the codling moth
Kathrin TSCHUDI-REIN, Silvia DORN
Eur. J. Entomol. 98 (1): 41-45, 2001 | DOI: 10.14411/eje.2001.007
Hyssopus pallidus (Askew) (Hymenoptera: Eulophidae) is a gregarious ectoparasitoid of late larvae of the codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae). In the present work reproduction and the development and morphology of the immature stages were studied. Five larval instars were differentiated by the shape and size of the mandibles. The larvae are hymenopteriform with a weakly sclerotized head and 13 segments. The first instar has four pairs of spiracles, while the other four instars have nine pairs. Under laboratory conditions of 22-24°C and 60-80% RH the egg stage lasted 1.5 days, the larval instars 6.3 days, and the...
BOOK REVIEW: Forsythe T.G.: Ground Beetles.
Eur. J. Entomol. 98 (1): 46, 2001 | DOI: 10.14411/eje.2001.008
Naturalists' Handbooks 8. The Richmond Publishing, Slough, 2000, 96 pp.
Differences in the searching behaviour of two strains of the egg parasitoid Telenomus busseolae (Hymenoptera: Scelionidae)
Stefano COLAZZA, M. Cristiana ROSI
Eur. J. Entomol. 98 (1): 47-52, 2001 | DOI: 10.14411/eje.2001.009
Telenomus busseolae Gahan (Hymenoptera: Scelionidae) is an egg parasitoid, which is under evaluation for possible introduction into Italy as a biological control agent of the Corn Stalk Borer, Sesamia nonagrioides (Lefebvre) (Lepidoptera: Noctuidae). Two strains are being considered, one from Africa and the other from Turkey. In a series of laboratory experiments we compared their reproductive capacities, walking behaviour, and host selection behaviour mediated by the sex pheromone and body scales of the host. As reciprocal crosses between the two strains yielded female offspring, they are not reproductively isolated. The two strains...
Revision and phylogenetic analysis of the subfamily Platerodinae (Coleoptera: Lycidae)
Eur. J. Entomol. 98 (1): 53-85, 2001 | DOI: 10.14411/eje.2001.010
Genus-group taxa of Platerodinae are revised and valid taxa are redescribed. The validity of Plateros Bourgeois, 1879 is reinstated. Libnetomimus Kleine, 1927 is made a junior synonym of Libnetis Waterhouse, 1878. Calleros Gorham, 1881, Calloplateros Pic, 1923, Costatoplateros Pic, 1949, Ditoneces Waterhouse, 1879, Libnetomorphus Pic, 1921, Microplateros Pic, 1921, Planeteros Gorham, 1883, Tolianus Pic, 1921, Melampyrus Waterhouse, 1879, and the subgenus Cautirodes Pic, 1921 are considered to be junior synonyms of Plateros Bourgeois, 1879. The subgenus...
BOOK REVIEW: Dempster J.P. & McLean I.F.G.: Insect Populations In Theory and in Practice. 19th Symposium of the Royal Entomological Society.
Eur. J. Entomol. 98 (1): 86, 2001 | DOI: 10.14411/eje.2001.011
10-11 September 1997 at the University of Newcastle. Kluwer Academic Publishers, Dordrecht, Boston, London, 1999, 506 pp.
Identification of Meligethes matronalis and M. subaeneus based on morphometric and ecological characters (Coleoptera: Nitidulidae)
Paolo AUDISIO, Carlo BELFIORE, Alessio DE BIASE, Gloria ANTONINI
Eur. J. Entomol. 98 (1): 87-97, 2001 | DOI: 10.14411/eje.2001.012
An analysis of morphometric and bionomic data (as well as the genetic evidence discussed in a companion paper) clearly shows that Meligethes matronalis Audisio & Spornraft, 1990 and M. subaeneus Sturm, 1845 (members of the Meligethes coracinus complex: Coleoptera, Nitidulidae, Meligethinae), recently synonymised by Kirejtshuk (1997), are distinct species. The two species are also compared with the closely related M. coracinus Sturm, 1845. Meligethes matronalis is strictly associated with Hesperis matronalis L. (Brassicaceae) in early Summer, whereas the larvae of the frequently syntopic M....
BOOK REVIEW: Lawrence J.F., Hastings A.M., Dallwitz M.J., Paine T.A. & Zurcher E.J.: Beetle Larvae of the World: Descriptions, Illustrations, Identification and Information Retrieval for Families and Subfamilies. CD-ROM.
Eur. J. Entomol. 98 (1): 98, 2001 | DOI: 10.14411/eje.2001.013
Version 1.1 for MS-Windows and Manual.
Phylogenetic relationships between the European and Asian eight spined larch bark beetle populations (Coleoptera, Scolytidae) inferred from DNA sequences and fungal associates
Christian STAUFFER, Thomas KIRISITS, Christa NUSSBAUMER, Roman PAVLIN, Michael J. WINGFIELD
Eur. J. Entomol. 98 (1): 99-105, 2001 | DOI: 10.14411/eje.2001.014
The eight spined larch bark beetles infest various species of Larix in Europe and Asia. Ips cembrae is the only Ips species with larch as its main host. Ips subelongatus, Ips fallax, Ips shinanonensis and Ips cembrae var. engadinensis are treated as synonyms of I. cembrae. These three putative species and the one variety are distinguished by their host tree and geographic distribution, as it is not possible to distinguish them on the basis of morphological differences. Beetles were collected from European and Asian populations, and from hosts and geographic areas where the species were...
BOOK REVIEW: Jong de H.: The Types of Diptera Described by J.C.H. de Meijere.
Eur. J. Entomol. 98 (1): 106, 2001 | DOI: 10.14411/eje.2001.015
Backhuys Publishers, Leiden, 2000, 271 pp.
Revision of the genus Vanniusoides (Heteroptera: Miridae)
Jacek GORCZYCA, Fedor KONSTANTINOV
Eur. J. Entomol. 98 (1): 107-110, 2001 | DOI: 10.14411/eje.2001.016
The genus Vanniusoides Carvalho & Lorenzato is revised and redescribed, a new species V. clypeatus is described from the Solomon Islands. Redescription of the species V. brevis (Poppius) and a key to the species of the genus are given. Illustrations of dorsal habitus, tarsi and male genitalia of the new species are provided.
Chemotaxonomical characterisation of males of Bombus lucorum (Hymenoptera: Apidae) collected in the Czech Republic
Klára URBANOVÁ, Irena VALTEROVÁ, Oldřich HOVORKA, Jiří KINDL
Eur. J. Entomol. 98 (1): 111-115, 2001 | DOI: 10.14411/eje.2001.017
Labial gland secretions of 26 males of the bumblebee Bombus lucorum (L.), collected in the Czech Republic, were analysed. The secretions consisted of 60 compounds; ethyl (Z)-9-tetradecenoate was the main component (average 53%). Although the males varied in colour, their labial gland secretions were similar in composition, which indicated they belonged to one species. Chemically the B. lucorum occurring in the Czech Republic correspond to the earlier described "blonde form" of this species.
BOOK REVIEW: Boucias D.G. & Pendland J.C.: Principles of Insect Pathology.
Eur. J. Entomol. 98 (1): 116, 2001 | DOI: 10.14411/eje.2001.018
Kluwer Academic Publisher, Dordrecht, The Netherlands, 1998, 537 pp + 12 pp, 151 ill., 39 tab.
Diurnal patterns of postfeeding larval dispersal in carrion blowflies (Diptera: Calliphoridae)
Eur. J. Entomol. 98 (1): 117-119, 2001 | DOI: 10.14411/eje.2001.019
A study of the diurnal rhythms in the postfeeding dispersal of the larvae of two coexisting carrion blowfly species, Calliphora vomitoria and Lucilia caesar, from corpses was conducted in the field. Larvae of both species dispersed exclusively at night. The emigration of white coloured larvae is risky. By dispersing at night the larvae minimise interactions with diurnal and crepuscular predators.
BOOK REVIEW: Lacey L.: Manual of Techniques in Insect Pathology.
Eur. J. Entomol. 98 (1): 120, 2001 | DOI: 10.14411/eje.2001.020
Academic Press, London, 1997, 409 pp., 102 ill., 4 tab.
Initial preference of oviposition sites: discrimination between living and dead plant material in Sympecma fusca and Coenagrion caerulescens (Odonata: Lestidae, Coenagrionidae)
Eur. J. Entomol. 98 (1): 121-123, 2001 | DOI: 10.14411/eje.2001.021
Sympecma fusca and Coenagrion caerulescens mainly deposit their eggs into floating dead parts of emergent plants. In their initial choice of oviposition site (selection of landing site) S. fusca does not distinguish between fresh and dead plant material, whereas C. caerulescens significantly prefers dead material. In S. fusca, the missing discrimination of the plant condition in the choice of the landing site is explained by its oviposition period in the beginning of the vegetation period when the green plant material is rare. C. caerulescens reproduces in summer and finds dead and living plants side by side....
BOOK REVIEW: Wittner M. & Weiss L.M.: The Microsporidia and Microsporidiosis.
Eur. J. Entomol. 98 (1): 124, 2001 | DOI: 10.14411/eje.2001.022
ASM- Press, Washington, 2000, 553 pp., 326 ill., 18 tab.