| an electron microscope study of nebenkern formation and differentiation in spermatids of murgantia histrionica (hemiptera, pentatomidae). | | 1968 | 5697117 |
| vibrational communication along plants by the stink bugs nezara viridula and murgantia histrionica. | the velocity and spectral characteristics of vibrational signals of nezara viridula (l.) and murgantia histrionica (hahn) (heteroptera: pentatomidae) were analyzed as the signals were transmitted through different plants. the velocity parameter of the body vibrations ranges from 0.1 to 1 mm/s. according to the mechanical properties of different substrates, the signal is attenuated or amplified during transmission from the insect's body to the substrate. attenuation of up to 20 db occurs during t ... | 2007 | 17306471 |
| survey of stink bug (hemiptera: pentatomidae) egg parasitoids in wheat, soybean, and vegetable crops in southeast virginia. | stink bugs (hemiptera: pentatomidae) cause significant damage to many different crops and horticultural commodities in virginia. however, little is known about the species diversity or impact of stink bug egg parasitoids in the state. a survey was conducted in 2005 and 2006 (may through september) in wheat (triticum aestivum l.), soybean (glycine max l.), and several vegetable crops by collecting natural egg masses of various stink bug species and by monitoring sentinel egg masses. a total of 57 ... | 2009 | 19389285 |
| indirect effects of temperature on stink bug fitness, via maintenance of gut-associated symbionts. | impacts of climate change on organisms are already apparent, with effects ranging from the individual to ecosystem scales. for organisms engaged in mutualisms, climate may affect population performance directly or indirectly through mediated effects on their mutualists. we tested this hypothesis for two stink bugs, acrosternum hilare and murgantia histrionica, and their gut-associated symbionts. we reared these species at two constant temperatures, 25 and 30 degrees c, and monitored population d ... | 2010 | 20023083 |
| influence of feeding and oviposition by phytophagous pentatomids on photosynthesis of herbaceous plants. | feeding by herbivorous insects may change photosynthetic activity of host plants. we studied how feeding and oviposition by herbivorous stink bugs, murgantia histrionica and nezara viridula (heteroptera: pentatomidae), affect photosynthetic parameters of brassica oleracea (savoy cabbage) and phaseolus vulgaris (french bean). first, we measured photosynthetic gas exchange, chlorophyll fluorescence imaging, and emission of induced volatile organic compounds (voc) immediately after feeding and duri ... | 2010 | 20490900 |
| using microscopy to assess chorion structural integrity and parasitoid oviposition sites on stink bug (hemiptera: pentatomidae) eggs. | previous efficacy studies found that many insecticides used by growers could be having an adverse effect on egg parasitoids (telenomus podisi) developing in the eggs of the brown stink bug (euschistus servus), while unhatched stink bugs experienced lower levels of mortality. one plausible explanation for this was that insecticides might enter parasitized eggs more readily via oviposition wounds. parasitized e. servus eggs, as well as nonparasitized stink bug (acrosternum hilare, e. servus, murga ... | 2010 | 20920377 |
| ultrastructural and functional aspects of the spermatheca in the american harlequin bug, murgantia histrionica (hemiptera: pentatomidae). | the spermatheca of murgantia histrionica (hahn) was investigated using fluorescence, scanning and transmission electron microscopy. the aim of the study was to elucidate the structure of this organ, pointing out differences between mated and unmated females. results have shown an elaborated cuticular structure associated with muscular and glandular tissues. the spermatheca is joined with the common oviduct by the spermathecal duct, forming a thin saccular dilation through two consecutive invagin ... | 2011 | 21584404 |
| host plant preference of harlequin bug (hemiptera: pentatomidae), and evaluation of a trap cropping strategy for its control in collard. | harlequin bug, murgantia histrionica (hahn) (hemiptera: pentatomidae), is a piercing-sucking pest of cole crops, causing cosmetic damage in low populations, while heavy pest pressure can kill plants or entire fields. field studies were conducted to evaluate a trap crop for control of harlequin bug in collard. field-cage choice tests found that potential trap crop plant species, mustard (brassica juncea 'southern giant curled'), rapeseed (b. napus 'athena'), rapini (b. rapa), and arugula (eruca s ... | 2013 | 23448042 |
| host chemical footprints induce host sex discrimination ability in egg parasitoids. | trissolcus egg parasitoids, when perceiving the chemical footprints left on a substrate by pentatomid host bugs, adopt a motivated searching behaviour characterized by longer searching time on patches were signals are present. once in contact with host chemical footprints, trissolcus wasps search longer on traces left by associated hosts rather than non-associated species, and, in the former case, they search longer on traces left by females than males. based on these evidences, we hypothesized ... | 2013 | 24244417 |
| cabbage waxes affect trissolcus brochymenae response to short-range synomones. | we show that induced synomones, emitted as a consequence of murgantia histrionica activity on brassica oleracea, are adsorbed by the epicuticular waxes of leaves and perceived by the egg parasitoid trissolcus brochymenae. leaves were exposed to m. histrionica females placed on the abaxial leaf surface. after 24 h, the leaves were treated mechanically using gum arabic, or chemically using chloroform, on the adaxial surface, and finally the adaxial surface was assayed with t. brochymenae by two-ch ... | 2013 | 23956054 |
| short-range allelochemicals from a plant-herbivore association: a singular case of oviposition-induced synomone for an egg parasitoid. | oviposition-induced plant synomones are semiochemical cues used by egg parasitoids during host selection, and are therefore considered important elements of plant defence. in this paper we show that, in the tritrophic system brassica oleracea-murgantia histrionica-trissolcus brochymenae, the latter responded in a closed arena and in a static olfactometer to induced chemicals that are perceived from a very short range and after parasitoid contact with the leaf surface opposite the treated surface ... | 2010 | 21037071 |
| supercooling points of murgantia histrionica (hemiptera: pentatomidae) and field mortality in the mid-atlantic united states following lethal low temperatures. | the harlequin bug, murgantia histrionica (hahn), is a serious pest of brassicaceous vegetables in southern north america. while this insect is limited in its northern range of north america, presumably by severe cold winter temperatures, specific information on its cold hardiness remains unknown. we determined the supercooling points (scps) for maryland and virginia adult populations and found no significant difference among these populations. scps were similar for adults ([formula: see text] = ... | 0 | 27497116 |
| rate of circulation of the body fluid in adult tenebrio molitor linnaeus, anasa tristis (de goer), and murgantia histrionica (hahn). | | 1951 | 14845697 |
| a transcriptome survey spanning life stages and sexes of the harlequin bug, murgantia histrionica. | the harlequin bug, murgantia histrionica (hahn), is an agricultural pest in the continental united states, particularly in southern states. reliable gene sequence data are especially useful to the development of species-specific, environmentally friendly molecular biopesticides and effective biolures for this insect. here, mrnas were sampled from whole insects at the 2nd and 4th nymphal instars, as well as sexed adults, and sequenced using illumina rna-seq technology. a global assembly of these ... | 2017 | 28587099 |
| antennal gustatory perception and behavioural responses in trissolcus brochymenae females. | trissolcus brochymenae (hymenoptera: platygastridae) is an egg parasitoid that could be used to control stink bugs like murgantia histrionica (heteroptera: pentatomidae), a pest of brassicaceous crops. before laying their eggs, parasitoid females spend considerable time examining the substrate with their antennae, which are also used during feeding and mating behaviours. this suggests that contact chemoreception plays a prominent role in many aspects of parasitoid ecology. therefore, we examined ... | 2015 | 25937056 |
| determination of the stereochemistry of the aggregation pheromone of harlequin bug, murgantia histrionica. | preparation of a complete stereoisomeric library of 1,10-bisaboladien-3-ols and selected 10,11-epoxy-1-bisabolen-3-ols was pivotal for the identification of the aggregation pheromone of the brown marmorated stink bug, halyomorpha halys. herein, we describe syntheses of the remaining 10,11-epoxy-1-bisabolen-3-ols, and provide additional evidence on the assignment of relative and absolute configurations of these compounds by single-crystal x-ray crystallography of an intermediate, (3s,6r,7r,10s)-1 ... | 2014 | 25408429 |
| color preference of harlequin bug (heteroptera: pentatomidae). | harlequin bug, murgantia histrionica (hahn), is an important pest of brassica crops in the southern united states. regional populations are highly variable and unpredictable from farm-to-farm, and therefore accurate monitoring of activity would greatly improve ipm decision-making and the timing of control tactics. to our knowledge, there is no monitoring device or proven trapping system for this pest. we contribute new knowledge of harlequin bug visual ecology, which will aid in the development ... | 2017 | 28981747 |
| the role of contact chemoreception in the host location process of an egg parasitoid. | taste allows insects to detect palatable or toxic foods, identify a mate, and select appropriate oviposition sites. the gustatory system strongly contributes to the survival and reproductive success of many species, yet it is rarely studied in insect parasitoids. in order to locate and assess a host in which they will lay their eggs, female wasps actively search for chemical cues using their sensory organs present mainly on the antennae. in this paper, we studied the role of antennal taste sensi ... | 2017 | 27392781 |
| the response of an egg parasitoid to substrate-borne semiochemicals is affected by previous experience. | animals can adjust their behaviour according to previous experience gained during foraging. in parasitoids, experience plays a key role in host location, a hierarchical process in which air-borne and substrate-borne semiochemicals are used to find hosts. in nature, chemical traces deposited by herbivore hosts when walking on the plant are adsorbed by leaf surfaces and perceived as substrate-borne semiochemicals by parasitoids. chemical traces left on cabbage leaves by adults of the harlequin bug ... | 2016 | 27250870 |
| attractiveness of harlequin bug, murgantia histrionica, aggregation pheromone: field response to isomers, ratios, and dose. | a two-component pheromone, (3s,6s,7r,10s)- and (3s,6s,7r,10r)-10,11-epoxy-1-bisabolen-3-ol (murgantiol), present in emissions from adult male harlequin bugs, murgantia histrionica, is most attractive in field bioassays to adults and nymphs in the naturally occurring ratio of ca. 1.4:1. each of the two individual synthetic stereoisomers is highly attractive to male and female adults and nymphs, but is more attractive in combination and when deployed with a harlequin bug host plant. blends of 8 st ... | 2014 | 25380993 |
| identification of sex pheromone components in trissolcus brochymenae females. | long- and short-range sex pheromones appear to play a crucial role in the mate finding and courtship behaviour of most parasitic hymenoptera. yet these parasitoids have been rarely investigated and only a few pheromones have been identified. recent studies have shown that sexual communication of trissolcus brochymenae (hymenoptera: platygastridae), a quasi-gregarious egg parasitoid of the harlequin bug, murgantia histrionica (heteroptera: pentatomidae), starts before contact between males and fe ... | 2012 | 23063499 |
| a finely tuned strategy adopted by an egg parasitoid to exploit chemical traces from host adults. | scelionid egg parasitoids can obtain reliable information on the presence of host eggs by discriminating host gender on the basis of chemical footprints of their co-evolved hosts, with a strong preference for the footprint left by host females. based on the concept of dietary specialization and infochemical use in natural enemies, it could be predicted that host gender discrimination in specialist species belonging to the genus trissolcus is further tuned to specific cues from distinctive chemic ... | 2009 | 19483000 |
| identification, synthesis, and bioassay of a male-specific aggregation pheromone from the harlequin bug, murgantia histrionica. | sexually mature male harlequin bugs produced a sex-specific compound, identified as one of the stereoisomers of the sesquiterpene epoxyalcohol 4-[3-(3,3-dimethyloxiran-2-yl)-1-methylpropyl]-1-methylcyclohex-2-en-1-ol (henceforth murgantiol), a compound with four chiral centers and 16 possible stereoisomers. production of the compound was highest during the middle of the day. individual virgin male bugs in separate containers produced the compound at a higher rate than virgin males in groups. the ... | 2008 | 18204884 |
| chemical cues from murgantia histrionica eliciting host location and recognition in the egg parasitoid trissolcus brochymenae. | host location and recognition by the egg parasitoid trissolcus brochymenae were analyzed in terms of response to kairomones from several stages of its host, murgantia histrionica. in a y-tube olfactometer, parasitoid females responded by increasing residence time and/or reducing linear speed to chemical cues from gravid females, virgin females and males, fifth and third instars, and eggs. in an open arena, t. brochymenae females also responded to patches contaminated by chemicals from the host i ... | 2003 | 12647857 |
| sequestration of glucosinolates by harlequin bug murgantia histrionica. | murgantia histrionica, the harlequin bug, is an aposematic pentatomid that feeds on toxic crucifer plants. by performing predator trials, we found that the bugs are distasteful to several species of bird predators. given this, we tested the hypothesis that the bugs sequester toxins from the crucifer plants they feed on for use in defense against predation. we used high-pressure liquid chromatography for analyses and tested if m. histrionica sequesters toxic chemicals from its crucifer diet. we f ... | 2002 | 12449503 |