| effect of an unknown plant substance on a shield bug. | | 1972 | 5049196 |
| toxicity of fenitrothion, an organophosphorus pesticide, against summer population of sunn pest, eurygaster integriceps put. (hemiptera: scutelleridae). | the sunn pest are a group of insect representing several genera of the shield bug (scutelleridae) and stink bug (pentatomidae) families, with the species eurygaster integriceps being the most economically important. the sunn pest is a major pest of wheat and barley in central and western asia and it accounts for annual losses of 20-30% for barley and up to 100% for wheat. in the recent decades problems have intensified largely due to change in farming practices. thus this pest threatens food sec ... | 2005 | 16628916 |
| uric acid recycling in the shield bug, parastrachia japonensis (hemiptera: parastrachiidae), during diapause. | nymphs of the univoltine shield bug, parastrachia japonensis grow by feeding on the drupes of their sole food plant, which are available for only 2 weeks a year. the new adults soon enter a reproductive diapause and survive without feeding for at least 10 months up to 2 years. uric acid was found to be the predominant component among four waste nitrogenous compounds, i.e., uric acid, allantoin, allantoic acid and urea in the body of both nymphs and adults in all stages, and to be predominantly e ... | 2006 | 16797581 |
| reduction of respiration rates by forming aggregations in diapausing adults of the shield bug, parastrachia japonensis. | parastrachia japonensis adults in diapause live mostly in aggregated conditions and can survive more than 1 year on only water. in this study, we demonstrated that diapausing adults had a high tendency to form clusters with no sexual bias. when 3-40 insects were enclosed in chambers of equal volume used to measure respiration, oxygen consumption was reduced to nearly half that when a single individual was enclosed. however, this reduction in metabolic rate was lost when the bugs were prevented f ... | 2005 | 16009373 |
| provisioned parastrachia japonensis (hemiptera: cydnidae) nymphs gain access to food and protection from predators. | females of the shield bug parastrachia japonensis scott progressively provision nymph-containing nests with drupes of the host tree, schoepfia jasminodora (olicaceae: rosidae: santales). the majority of nests are 5-15 m from the host tree, a distance thought to have been a major impetus for the occurrence of provisioning in this species. however, the function of provisioning is not well understood. we carried out two field experiments to determine whether provisioning is nutritionally important ... | 2000 | 11124873 |
| [receptors of the head, thoracic and abdominal segments in the shield bug eurygaster integriceps]. | | 2017 | 11190147 |
| the directional homing behaviour of the subsocial shield bug, parastrachia japonensis (heteroptera: cydnidae), under different photic conditions. | the female subsocial shield bug, parastrachia japonensis, provisions its nymphs by foraging on the ground in the forest during the japanese rainy season, and the bug uses homing navigation to drag a drupe back to its burrow by the shortest route during the day. to study whether or not this bug performs this provisioning behaviour under different photic conditions, we observed the homing behaviour and homing direction of bugs in the field around the clock and/or under various weather conditions. ... | 2003 | 12719644 |
| round-the-clock homing behavior of a subsocial shield bug, parastrachia japonensis (heteroptera: parastrachiidae), using path integration. | females of the subsocial shield bug, parastrachia japonensis (parastrachiidae), are central-place foragers, collecting drupes for their young from nearby host trees by walking along the forest floor both during the day and at night. because burrows are often some distance from the drupe-shedding tree, the bugs must repeatedly leave their burrows, search for drupes, and return to the burrows. after a bug leaves its burrow, it searches arduously until it encounters a drupe. when a drupe is obtaine ... | 2007 | 17867854 |
| comparative mitogenomic analysis of the superfamily pentatomoidea (insecta: hemiptera: heteroptera) and phylogenetic implications. | insect mitochondrial genomes (mitogenomes) are the most extensively used genetic marker for evolutionary and population genetics studies of insects. the pentatomoidea superfamily is economically important and the largest superfamily within pentatomomorpha with over 7,000 species. to better understand the diversity and evolution of pentatomoid species, we sequenced and annotated the mitogenomes of eurydema gebleri and rubiconia intermedia, and present the first comparative analysis of the 11 pent ... | 2015 | 26076960 |
| corrigendum: gammaproteobacteria as essential primary symbionts in the striped shield bug, graphosoma lineatum (hemiptera: pentatomidae). | | 2017 | 28112158 |
| hindwings of insects as concept generator for hingeless foldable shading systems. | hingeless shading systems inspired by nature are increasingly the focus of architectural research. in contrast to traditional systems, these compliant mechanisms can reduce the amount of maintenance-intensive parts and can easily be adapted to irregular, doubly curved, facade geometries. previous mechanisms rely merely on the reversible material deformation of composite structures with almost homogeneous material properties. this leads to large actuation forces and an inherent conflict between t ... | 2017 | 29094682 |
| <i>acrosternum</i> <i>heegeri</i> fieber, 1861 (hemiptera: heteroptera: pentatomidae), another mediterranean bug expanding to the north. | acrosternum heegeri fieber, 1861 (hemiptera: heteropera: pentatomidae: pentatominae: pentatomini), a holomediterranean-turanian shield bug species, is recorded for the first time from hungary, representing the first known occurrence of the species in central europe. the species is illustrated, its geographic distribution is reviewed. the occurrence of a. heegeri in two localities in budapest, regular records from one of the localities in the years 2015 and 2016, and the finding of an overwinteri ... | 2017 | 29245603 |
| insect chemistry and chirality. | examination of the chemistry of a number of australian insect species provided examples of unusual structures and encouraged determinations of their absolute stereochemistry by stereocontrolled syntheses and chromatographic comparisons. inter alia, studies with the fruit-spotting bug (amblypelta nitida), certain parasitic wasps (biosteres sp.), the aposematic shield bug (cantao parentum), and various species of scarab grubs are summarized. the determination of enantiomeric excesses (ee's) for co ... | 2003 | 12884383 |
| diet-consumer nitrogen isotope fractionation for prolonged fasting arthropods. | nitrogen acquisition for cellular metabolism during diapause is a primary concern for herbivorous arthropods. analyses of naturally occurring stable isotopes of nitrogen help elucidate the mechanism. relevant articles have cited (58 times up to mid-june 2011) anomalously elevated δ(15)n (per mil deviation of (15)n/(14)n, relative to atmospheric nitrogen=0 ‰) values (diet-consumer nitrogen isotope fractionation; up to 12 ‰) for a prolonged fasting raspberry beetle (byturus tomentosus degeer (cole ... | 2011 | 22166153 |
| gammaproteobacteria as essential primary symbionts in the striped shield bug, graphosoma lineatum (hemiptera: pentatomidae). | many members of suborder heteroptra harbor heritable symbiotic bacteria. here we characterize the gut symbiotic bacterium in graphosoma lineatum (hemiptera: pentatomidae) by using molecular phylogeny, real-time pcr analysis as well as light and electron microscopy observations. the microscopy observations revealed the presence of a large number of rod-shaped bacterial cells in the crypts. a very high prevalence (98 to 100%) of the symbiont infection was found in the insect populations that stron ... | 2016 | 27609055 |
| spectral sideband produced by a hemispherical concave multilayer on the african shield-bug calidea panaethiopica (scutelleridae). | the african shield-backed bug calidea panaethiopica is a very colorful insect which produces a range of iridescent yellow, green, and blue reflections. the cuticle of the dorsal side of the insect, on the shield, the prothorax and part of the head, is pricked of uniformly distributed hemispherical hollow cavities a few tens micrometers deep. under normal illumination and viewing the insect's muffin-tin shaped surface gives rise to two distinct colors: a yellow spot arising from the bottom of the ... | 2009 | 19391778 |
| canopy compass in nocturnal homing of the subsocial shield bug, parastrachia japonensis (heteroptera: parastrachiidae). | in contrast to an open environment where a specific celestial cue is predominantly used, visual contrast of canopies against the sky through the gap, known as canopy cues, is known to play a major role for visually guided insect navigators in woodland habitats. in this paper, we investigated whether a subsocial shield bug, parastrachia japonensis, could gauge direction using canopy cues on a moonless night. the results show that they could perform the round trip foraging behaviour even in an exp ... | 2008 | 18058079 |
| [dynamics of energy metabolism in ontogenesis of striped shield bug (graphosoma lineatum l.) and cabbage moth (mamestra brassicae l.)]. | dynamics of growth and oxygen consumption during ontogenesis of insects with direct (striped shield bug graphosoma lineatum l.) and indirect (cabbage moth mamestra brassicae l.) development have been compared. the correlation between a character of energy metabolism alteration and peculiarities of development of the insects has been shown. cyclic decrease of oxygen consumption during molt and sharp dropping during metamorphosis have been observed in insects with indirect development. the decreas ... | 2011 | 21542338 |
| low survivorship of dauer larva in the nematode caenorhabditis japonica, a potential comparative system for a model organism, c. elegans. | the nematode dauer larva (dl) is a non-aging diapause stage. the dl of the model nematode caenorhabditis elegans has been studied as a model system for aging and longevity. however, information on dl in other nematode species is limited. in this study, the survivorship, storage, energy consumption, and oxidative stress tolerance of caenorhabditis japonica dl were examined. c. japonica is a close relative of c. elegans, but has species-specific phoretic associations with the shield bug parastrach ... | 2012 | 22426108 |
| specialist versus generalist life histories and nucleotide diversity in caenorhabditis nematodes. | species with broad ecological amplitudes with respect to a key focal resource, niche generalists, should maintain larger and more connected populations than niche specialists, leading to the prediction that nucleotide diversity will be lower and more subdivided in specialists relative to their generalist relatives. this logic describes the specialist-generalist variation hypothesis (sgvh). some outbreeding species of caenorhabditis nematodes use a variety of invertebrate dispersal vectors and ha ... | 2014 | 24403340 |
| maternal vibration: an important cue for embryo hatching in a subsocial shield bug. | hatching care has been reported for many taxonomic groups, from invertebrates to vertebrates. the sophisticated care that occurs around hatching time is expected to have an adaptive function supporting the feeble young. however, details of the characteristics of the adaptive function of hatching care remain unclear. this study investigated the hatching care of the subsocial shield bug, parastrachia japonensis (heteroptera: parastrachiidae) to verify its function. results show that the p. japonen ... | 2014 | 24498224 |