abstract：:Protease inhibitors (PIs) have been shown to cause lethal and sublethal effects on aphids depending on the kind of PI and aphid species. Therefore, these proteins might affect aphid parasitoids directly by inhibiting their digestive proteolysis or indirectly via their development in a less suitable host. In our study,...

journal_title：Journal of insect physiology

authors： Azzouz H,Campan ED,Cherqui A,Saguez J,Couty A,Jouanin L,Giordanengo P,Kaiser L

更新日期：2005-08-01 00:00:00

abstract：:To determine whether ecdysteroids are associated with reproductive division of labor in Bombus terrestris, we measured their levels in hemolymph and ovaries of queens and workers. Queens heading colonies had large active ovaries with high ecdysteroid content, whereas virgin gynes and mated queens before and after diap...

journal_title：Journal of insect physiology

authors： Geva S,Hartfelder K,Bloch G

更新日期：2005-07-01 00:00:00

abstract：:Earlier experiments demonstrated a strong up-regulation of per mRNA in wild-type (Wt) females of Pyrrhocoris apterus reared under diapause-inducing short days, while per mRNA levels were low in females of two non-diapause mutant strains (Nd), irrespective of photoperiod. In the present study, different sequences of pe...

journal_title：Journal of insect physiology

authors： Dolezel D,Vanecková H,Sauman I,Hodkova M

更新日期：2005-06-01 00:00:00

abstract：:A diapause-specific peptide (DSP) composed of 41 amino acid residues including 6 cysteines, has been isolated from diapausing adults of the leaf beetle Gastrophysa atrocyanea. In this study, DSP was found to be expressed primarily in diapausing adults and to a minor extent in pupae, but not in eggs, larvae, or post-di...

journal_title：Journal of insect physiology

authors： Tanaka H,Suzuki K

更新日期：2005-06-01 00:00:00

abstract：:In the oblique-banded leafroller, Choristoneura rosaceana, and the spruce budworm, C. fumiferana, male reproductive performance decreases with consecutive matings. While the onset time of mating did not vary, the time spent mating was longer in mated than in virgin males. Furthermore, a decline observed in the spermat...

journal_title：Journal of insect physiology

authors： Marcotte M,Delisle J,McNeil JN

更新日期：2005-05-01 00:00:00

abstract：:Adult male crayfish Procambarus clarkii exist in two morphotypes. They continue to molt as adults, switching between Form Is and Form IIs. Form Is are primary reproductive types, with large chelae and spines on the ischiopodites of the third and fourth pair of walking legs. Form IIs are non-reproductive types with sma...

journal_title：Journal of insect physiology

authors： Laufer H,Demir N,Pan X,Stuart JD,Ahl JS

更新日期：2005-04-01 00:00:00

abstract：:For the cockroach Leucophaea maderae the developmental profile of lipophorin (Lp) concentrations in the hemolymph was determined through the entire vitellogenic period. At mid-vitellogenesis the concentrations of Lp had risen to 6 times the level at emergence and then declined to 2/3 of such high values at ovulation. ...

journal_title：Journal of insect physiology

authors： Engelmann F,Mala J

更新日期：2005-04-01 00:00:00

abstract：:Mating in moths is generally mediated by female-produced sex pheromones. Mating activity, female pheromone production/release and male pheromone responsiveness all show diurnal variations in many species. We found that the response of the male Egyptian cotton leafworm, Spodoptera littoralis, to sex pheromone gland ext...

journal_title：Journal of insect physiology

authors： Silvegren G,Löfstedt C,Qi Rosén W

更新日期：2005-03-01 00:00:00

abstract：:Venom from the ectoparasitic wasp Nasonia vitripennis induces cellular injury that appears to involve the release of intracellular calcium stores via the activation of phospholipase C, and culminates in oncotic death. A linkage between release of intracellular Ca2+ and oncosis has not been clearly established and was ...

journal_title：Journal of insect physiology

authors： Rivers DB,Crawley T,Bauser H

更新日期：2005-02-01 00:00:00

abstract：:We have investigated the effect of the locust myosuppressin, SchistoFLRFamide, on the activity of amylase and alpha-glucosidase in the midgut of 2-week old male locusts. Total enzyme activity in the lumen contents and tissue extracts of midguts responds to SchistoFLRFamide in a dose-dependent manner that appears to va...

journal_title：Journal of insect physiology

authors： Hill SR,Orchard I

更新日期：2005-01-01 00:00:00

abstract：:Geographic variation is characteristic of many physiological traits at the population and species levels. However, several recent studies have suggested that population-level variation is either limited or that it is mostly a consequence of phenotypic plasticity. Here we show that there is considerable physiological i...

journal_title：Journal of insect physiology

authors： Klok CJ,Chown SL

更新日期：2005-01-01 00:00:00

abstract：:Parental care is a behavioral strategy that contributes to increased fitness of progeny. Among terrestrial arthropods, many isopods provide extensive parental care. Few studies have quantified the underlying cost of parental care in terms of energy. We used the terrestrial woodlouse Porcellio laevis (Latreille) as a s...

journal_title：Journal of insect physiology

authors： Lardies MA,Cotoras IS,Bozinovic F

更新日期：2004-12-01 00:00:00

abstract：:At 25 degrees C and under a long-day photoperiod, all 5th instar Psacothea hilaris larvae pupate at the next molt. Under a short-day photoperiod, in contrast, they undergo one or two additional larval molts and enter diapause; the 7th instar larvae enter diapause without further molt. The changes in hemolymph juvenile...

journal_title：Journal of insect physiology

authors： Munyiri FN,Ishikawa Y

更新日期：2004-11-01 00:00:00

abstract：:We found that in the flesh fly Neobellieria bullata, vitellogenesis can be inhibited in a dose-dependent way by two injections of 60 microg MK-801/g body mass. In the desert locust Schistocerca gregaria, vitellogenesis can also be fully inhibited but only by repeated injections of 200-400 microg/g body mass. In this s...

journal_title：Journal of insect physiology

authors： Begum M,Breuer M,Kodrik D,M Rahman M,De Loof A

更新日期：2004-10-01 00:00:00

abstract：:The patch-clamp technique was applied to the apical membrane of epithelial midgut cells of a lepidoptera, Manduca sexta L. Access to the apical membrane, the main target site of Bacillus thuringiensis (Bt) toxins, was achieved by using freshly isolated larval midgut preparations mounted onto holding glass pipettes. Th...

journal_title：Journal of insect physiology

authors： Peyronnet O,Noulin JF,Laprade R,Schwartz JL

更新日期：2004-09-01 00:00:00

abstract：:In ants, both cuticular and postpharyngeal gland (PPG) hydrocarbons (HCs) have been involved in nestmate recognition. However, no detailed comparison is available. A comparative study including also high density lipophorin (HDLp), an internal HC carrier, was therefore undertaken on Pachycondyla villosa. Purified HDLp ...

journal_title：Journal of insect physiology

authors： Lucas C,Pho DB,Fresneau D,Jallon JM

更新日期：2004-07-01 00:00:00

abstract：:Sublethal concentrations of the bisacylhydrazine moulting hormone agonists, RH-5849, and tebufenozide (RH-5992) were fed to sixth (final) instar larvae of Spodoptera litura. Both RH-5849 and tebufenozide adversely affected the mating success of S. litura when the surviving treated males were crossed with normal female...

journal_title：Journal of insect physiology

authors： Seth RK,Kaur JJ,Rao DK,Reynolds SE

更新日期：2004-06-01 00:00:00

abstract：:Photoperiodic control of diapause induction was investigated in the short-day species, Colaphellus bowringi, which enters summer and winter diapause as adult in the soil. Photoperiodic responses at 25 and 28 degrees C revealed a critical night length between 10 and 12 h; night lengths > or =12 h prevented diapause, wh...

journal_title：Journal of insect physiology

authors： Wang X,Ge F,Xue F,You L

更新日期：2004-05-01 00:00:00

abstract：:The ability of first instar nymphs and newly moulted pre-reproductive adults of the grain aphid S. avenae to rapidly cold harden was investigated. When nymphs reared at 20 degrees C were transferred directly to -8 degrees C for 3 h, there was 18% survival. This exposure was selected as the discriminating temperature. ...

journal_title：Journal of insect physiology

authors： Powell SJ,Bale JS

更新日期：2004-04-01 00:00:00

abstract：:A new equine abortigenic disease, mare reproductive loss syndrome (MRLS), was recognized and significantly impacted the Ohio Valley in the springs of 2001 and 2002. MRLS caused approximately 330 million US dollars in losses in 2001. An epidemiological investigation of MRLS associated occurrence of the disease with exp...

journal_title：Journal of insect physiology

authors： Webb BA,Barney WE,Dahlman DL,DeBorde SN,Weer C,Williams NM,Donahue JM,McDowell KJ

更新日期：2004-02-01 00:00:00

abstract：:Diapause hormone (DH) and pheromone biosynthesis activating neuropeptide (PBAN) are encoded by a single mRNA in the suboesophegeal ganglion (SG) and are responsible for induction of embryonic diapause in Bombyx mori and sex pheromone biosynthesis in lepidopteran insects. PBAN cDNA analyses revealed that the DH-like pe...

journal_title：Journal of insect physiology

authors： Zhang TY,Sun JS,Zhang LB,Shen JL,Xu WH

更新日期：2004-01-01 00:00:00

abstract：:To counteract water loss due to excretion, cuticular transpiration and respiration, various groups of arthropods have developed mechanisms for active uptake of water vapor from unsaturated air. In this study, active uptake capabilities and water loss rates were examined in the various developmental stages of the cat f...

journal_title：Journal of insect physiology

authors： Thiemann T,Fielden LJ,Kelrick MI

更新日期：2003-12-01 00:00:00

abstract：:Endoparasitoid insects have evolved mechanisms to counteract host immune defences. At oviposition, the endoparasitoid Venturia canescens injects virus-like particles (VLPs) together with the egg that interfere with the immune system of the host. These prevent encapsulation of the parasitoid egg. It has been shown that...

journal_title：Journal of insect physiology

authors： Amat I,Bernstein C,van Alphen JJ

更新日期：2003-12-01 00:00:00

abstract：:Last instar larvae of the tobacco budworm, Heliothis virescens F., fail to pupate and have little 20-hydroxyecdysone when parasitized by Toxoneuron nigriceps (Viereck). In this paper, we extend these observations to juvenile hormone (JH) to determine if parasitism by this wasp affects other endocrine systems. To this ...

journal_title：Journal of insect physiology

authors： Li S,Falabella P,Kuriachan I,Vinson SB,Borst DW,Malva C,Pennacchio F

更新日期：2003-11-01 00:00:00

abstract：:Larvae of the west-Japan type yellow-spotted longicorn beetle, Psacothea hilaris (Coleoptera: Cerambycidae), show a long-day type photoperiodic response at 25 degrees C; under long-day conditions, larvae pupate after the fourth or fifth instar, while under short-day conditions, they undergo a few nonstationary supernu...

journal_title：Journal of insect physiology

authors： Shintani Y,Munyiri FN,Ishikawa Y

更新日期：2003-10-01 00:00:00

abstract：:We measured the energy turnover (oxygen consumption) of honeybees (Apis mellifera carnica), which were free to move within Warburg vessels. Oxygen consumption of active bees varied widely depending on ambient temperature and level of activity, but did not differ between foragers (>18 d) and middle-aged hive bees (7-10...

journal_title：Journal of insect physiology

authors： Stabentheiner A,Vollmann J,Kovac H,Crailsheim K

更新日期：2003-09-01 00:00:00

abstract：:Interactions between the locust endocrine and immune systems have been studied in vivo in relation to nodule formation and activation of the prophenoloxidase cascade in the haemolymph. Injection of bacterial lipopolysaccharide (LPS) extracted from Escherichia coli induces nodule formation in larval and adult locusts b...

journal_title：Journal of insect physiology

authors： Goldsworthy G,Chandrakant S,Opoku-Ware K

更新日期：2003-08-01 00:00:00

abstract：:Following a short swarming flight, winged adults of the Formosan subterranean termite, Coptotermes formosanus lose their wings and form tandem pairs. These dealates or primary reproductives then form incipient colonies. Topical application of 5 microg of the non-steroidal ecdysone agonist RH-0345 (halofenozide) in 0.1...

journal_title：Journal of insect physiology

authors： Raina AK,Park YI,Hruska Z

更新日期：2003-07-01 00:00:00

abstract：:The major juvenile hormone (JH) homolog synthesized in vitro by the adult female Medfly (Ceratitis capitata) corpus allatum (CA) is JHB(3), with JH-III the minor homolog. Methyl-incorporation in vitro in post-eclosion virgin females is age-dependent. Basal activity occurs during the first four days post-eclosion and i...

journal_title：Journal of insect physiology

authors： Moshitzky P,Gilbert LI,Applebaum SW

更新日期：2003-06-01 00:00:00

abstract：:Polydnaviruses are unique because of their obligatory association with thousands of parasitoid wasp species from the braconid and ichneumonid families of hymenopterans. PDVs are injected into the parasitized hosts and are essential for parasitism success. However, polydnaviruses are also unique because of their genome...

journal_title：Journal of insect physiology

authors： Drezen JM,Provost B,Espagne E,Cattolico L,Dupuy C,Poirié M,Periquet G,Huguet E

更新日期：2003-05-01 00:00:00

abstract：:To develop inside their insect hosts, endoparasitoid wasps must either evade or overcome the host's immune system. Several ichneumonid and braconid wasps inject polydnaviruses that display well-studied immune suppressive effects. However, little is known about the strategies of immunoevasion used by other parasitoid f...

journal_title：Journal of insect physiology

authors： Labrosse C,Carton Y,Dubuffet A,Drezen JM,Poirie M

更新日期：2003-05-01 00:00:00

abstract：:The hymenopteran Macrocentrus cingulum usually deposits one egg into the larval body cavity of lepidopteran Ostrinia furnacalis, and the egg subsequently splits into several dozens of embryos during its development. How the parasitoid eggs and embryos avoid encapsulation by the host's immune response remains unknown. ...

journal_title：Journal of insect physiology

authors： Hu J,Zhu XX,Fu WJ

更新日期：2003-04-01 00:00:00

abstract：:Vitellogenesis in Aedes aegypti of uniform body size was followed at 27 degrees C in narrow time intervals throughout their first reproductive cycle by measuring the length, diameter, and volume of follicles and oocytes, the latter as an expression of the yolk mass (vitellus). Independent of all experimental condition...

journal_title：Journal of insect physiology

authors： Briegel H,Gut T,Lea AO

更新日期：2003-03-01 00:00:00

abstract：:A primary cell culture was developed for efferent dorsal unpaired median (DUM) neurons of the locust. The isolated somata were able to generate Tetrodotoxin (TTX)-sensitive action potentials in vitro. The alpha-like scorpion toxin BmK M1, from the Asian scorpion Buthus martensi Karsch, prolonged the duration of the ac...

journal_title：Journal of insect physiology

authors： Brône B,Tytgat J,Wang DC,Van Kerkhove E

更新日期：2003-02-01 00:00:00

abstract：:Nine-day-old decapitated females injected with different doses of Hez-PBAN produced significantly less pheromone than 1-day-old individuals, suggesting that the age-related decline in the pheromone titre of Choristoneura fumiferana and C. rosaceana virgin females was primarily the result of a reduced ability of the gl...

journal_title：Journal of insect physiology

authors： Delisle J,Simard J

更新日期：2003-01-01 00:00:00

abstract：:To explore the role of tyramine in the transformation of reproductive states of honeybee workers, brain levels of tyramine and N-acetyltyramine were measured in both normal and queenless workers. Queenless workers had higher tyramine levels and lower N-acetyltyramine levels than normal workers did. Intermediate reprod...

journal_title：Journal of insect physiology

authors： Sasaki K,Nagao T

更新日期：2002-12-01 00:00:00

abstract：:The timing of pupal commitment of the forewing imaginal discs of the silkworm, Bombyx mori, was determined by a transplantation assay using fourth instar larvae. The wing discs were not pupally committed at the time of ecdysis to the fifth instar. Pupal commitment began shortly after the ecdysis and was completed in 1...

journal_title：Journal of insect physiology

authors： Obara Y,Miyatani M,Ishiguro Y,Hirota K,Koyama T,Izumi S,Iwami M,Sakurai S

更新日期：2002-10-01 00:00:00

abstract：:When non-diapause and diapause pupae of Delia antiqua were exposed to various thermoperiods where thermophase (T) was 25 degrees C and the cryophase (C) was 15 or 20 degrees C (TC(15) or TC(20)) in constant darkness (DD), the majority of both types of flies emerged before the rise in temperature. Eclosion time was del...

journal_title：Journal of insect physiology

authors： Watari Y

更新日期：2002-09-01 00:00:00

abstract：:The pheromone-sensitive receptor cells of male moth antennae are capable of detecting the rapid changes in stimulus intensity encountered in natural pheromone odour plumes. We investigated temporal response characteristics of the two receptor cell types of the sensillum trichodeum of female Bombyx mori, which are most...

journal_title：Journal of insect physiology

authors： Barrozo RB,Kaissling KE

更新日期：2002-08-01 00:00:00

abstract：:Amblyseius californicus was introduced into the UK in the early 1990s as a biocontrol agent against glasshouse red spider mite Tetranychus urticae. This study investigated the effects of temperature on the establishment potential of A. californicus in the UK in the light of recent reports of their successful overwinte...

journal_title：Journal of insect physiology

authors： Hart AJ,Bale JS,Tullett AG,Worland MR,Walters KF

更新日期：2002-06-01 00:00:00