| enzymic activity of 3-beta-hydroxysteroid dehydrogenase and of some glycolytic enzymes occurring in the testicle of graphosoma italicum mull. and of eurydema ventralis kol. (heteroptera--pentatomidae). | in the testicle of graphosoma italicum and eurydema ventralis the histochemical localization of 3-beta-hsd, sdh, mdh and ldh was followed up. the enzymic activity was detected in various stages of the sexual cells; the strongest activity was found in the evoluted spermatids and spermatozoa. as far as the nutritive cells of the testicle are concerned, the reaction of these different enzymes appeared very weak or absent. | 1976 | 987615 |
| [behavior of holokinetic chromosomes in the spermatogenesis of bugs]. | chromosomes were studied on the spermatogonial metaphase and on different stages of meiotic division in males of eurydeme geblery kol. and e. ventrale kol. the set of male chromosomes of the above species involves six pairs of autosomes and an xy sex pair, which is commonly the case in pentatomidae. in the spermatogenesis, division types are reductional for autosomes and equational for sex chromosomes in the first metaphase; but the situation is quite opposite in the second metaphase. the sex ch ... | 1976 | 1027160 |
| chemical attraction of kleptoparasitic flies to heteropteran insects caught by orb-weaving spiders. | insects of the heteropteran families pentatomidae (stink bugs) and coreidae (squash bugs), when being eaten by the orb-weaving spider nephila clavipes, attract flies of the family milichiidae. the flies aggregate on the bugs and, as kleptoparasites, share in the spider's meal. stink bugs and squash bugs typically eject defensive sprays when attacked; they do so when caught by nephila, but the spray only minimally affects the spider. evidence is presented indicating that it is the spray of the bu ... | 1991 | 1896468 |
| occurrence of glycogen during vitellogenesis in halys dentata (hemiptera-pentatomidae). | | 1971 | 4110632 |
| on the chemical components of the stink of "chrysocoris stolli" wolf. (heteroptera: pentatomidae: insecta). | | 1969 | 4188398 |
| a note on an egg parasite of megymenum subpurpurascens west (pentatomidae: rhyncheta). | | 1966 | 4224349 |
| electron microscopic observations on the spermiogenesis in eurydema ventralis kol. (heteroptera-pentatomidae). | | 1973 | 4716395 |
| studies on the neurosecretory system and retrocerebral endocrine glands of nezara viridula linn. (heteroptera: pentatomidae). | | 1972 | 5016314 |
| studies on the neurosecretory system of the bug. scutellera nobilis fabr. (heteroptera: pentatomidae), with reference to the material in the aortal wall. | | 1969 | 5376583 |
| an electron microscope study of nebenkern formation and differentiation in spermatids of murgantia histrionica (hemiptera, pentatomidae). | | 1968 | 5697117 |
| histological changes in the midgut epithelium during metamorphosis in chrysocoris stolli, wolff (heteroptera, pentatomidae). | | 1968 | 5731512 |
| chromosome numbers in five species of pentatomidae reut (hemiptera - heteroptera). | | 1968 | 5751866 |
| observations on the neurosecretory axons in the aortal wall of halys dentatus f. (heteroptera: pentatomidae). | | 1969 | 5796183 |
| [2 new species of eurystethus mayr (hemiptera, pentatomidae, discocephaline)]. | | 1966 | 5998790 |
| neuroendocrine system and storage of neurosecretory material in the dorsal aorta in a bug chrysocoris stollii wolf (heteroptera: pentatomidae). | the neuroendocrine system of chrysocoris stollii has been described with the help of pf bulk-stained preparations and sections. two groups of median neurosecretory cells (nsc), each consisting of 5 a-cells in females and 7 a-cells in male individuals together with 3 b-cells, have been observed in the pars intercerebralis medialis of the brain. the lateral neurosecretory cells are absent. the axons of the two groups of median neurosecretory cells give off two bundles of neurosecretory axonal path ... | 1980 | 7451943 |
| johnston's organ and central organ in nezara viridula (l.) (heteroptera, pentatomidae). | the fine structure of johnston's organ and central organ in nezara viridula (heteroptera, pentatomidae) is described. johnston's organ consists of 45 scolopidia distributed around the periphery of the distal part of the third antennal segment (distal pedicellite). the scolopidia are anchored separately in invaginations of joint cuticle between the pedicel and flagellum. the scolopidia are amphinematic and each scolopidium comprises three sensory cells and three enveloping cells. the latter are a ... | 1996 | 8650675 |
| mechanoreceptors in insects: johnston's organ in nezara viridula (l) (pentatomidae, heteroptera). | behavioural observations of nezara viridula suggested that the antennae could be involved in detecting the substrate vibrations important in intraspecific communication of these insects. therefore the vibrosensitive properties of johnston's organ, a mechanoreceptor sensitive to the movements of the antennal flagellum relative to pedicel, were investigated. vibrational stimuli were applied to the proximal flagellar segment where activity in the antennal nerve was recorded via a tapered tungsten e ... | 1996 | 8739374 |
| comparison of perillus bioculatus and podisus maculiventris (hemiptera:pentatomidae) as potential control agents of the colorado potato beetle (coleoptera:chrysomelidae). | in laboratory and microplot consumption tests, spined soldier bug, podisus maculiventris (say), ate at least as many colorado potato beetle, leptinotarsa decemlineata (say), eggs and larvae as did the twospotted stink bug, perillus bioculatus (f.). p. maculiventris also remained in field microplots infected with colorado potato beetle egg masses for slightly longer than did p. bioculatus. the 2 predators were equally effective at consuming egg masses, reducing densities of beetle larvae, and pre ... | 1996 | 8913113 |
| intergeneric distribution and immunolocalization of a putative odorant-binding protein in true bugs (hemiptera, heteroptera). | lygus antennal protein (lap) is an olfactory-related protein of the tarnished plant bug lygus lineolaris (hemiptera, heteroptera: miridae), a hemimetabolous insect. in previous work, a polyclonal antiserum was generated against the n-terminal sequence of lap; lap immunoreactivity was strongest in antennae of adult males, but was also present in antennae of adult females and of nymphs. in the current study, lap immunoreactivity was examined to determine the species specificity and the tissue and ... | 1998 | 9390934 |
| [population parameters of three parasitoids (hymenoptera: scelionidae, encyrtidae) hosted by the predator podisus nigrispinus (heteroptera: pentatomidae)]. | the reproductive parameters of telenomus podisi, trissolcus brochymenae (hymenoptera: scelionidae) and ooencyrtus sp. (hymenoptera: encyrtidae) were studied for three generations on their natural host podisus nigrispinus (dallas, 1851) (hemiptera: pentatomidae). a parasitism rate of 10 eggs/day/species was used under laboratory conditions of 27 +/- 1 degrees c, 60 +/- 10% rh and 14 h of photophase. no significant differences were detected between generations in terms of net reproductive rate (ro ... | 1997 | 9404522 |
| effect of eucalyptus feeding in the development, survival and reproduction of tynacantha marginata (heteroptera: pentatomidae). | the effect of feeding on eucalyptus leaves of tynacantha marginata (heteroptera: pentatomidae) was studied in brazil. the use of this plant as a complementary food source for the predatory bug increased its oviposition period, generation time, and net reproductive rate. eucalyptus leaves apparently had no influence on the survival and development of t. marginata. | 1997 | 9404523 |
| laboratory and field studies on the infection of stink bugs, nezara viridula, piezodorus guildinii, and euschistus heros (hemiptera: pentatomidae) with metarhizium anisopliae and beauveria bassiana in brazil | isolates of metarhizium anisopliae (cnpso-ma12) and beauveria bassiana (cnpso-bb56) were tested under field conditions as biological control agents of soybean stink bugs (nezara viridula, piezodorus guildinii, and euschistus heros). kaolin-based powder formulations of m. anisopliae or b. bassiana were applied to soybean plots at a rate of 1.5 x 10(13) conidia per ha. after treatment, field cages (0.25 m2) were placed in plots and stink bug adults were introduced into the cages. mycosis for both ... | 1998 | 9500941 |
| non-genetic benefits of mate choice: fecundity enhancement and sexy sons. | i compared reproductive success (lifetime number of fertilized eggs) as a function of mate choice among females of the stink bug, nezara viridula l. (hemiptera: pentatomidae). 'choosing' (c) females were placed with one of two males on alternate days. ci females chose between inexperienced males while cr females chose between males previously rejected by ci females. 'non-choosing' (n) females were placed with the same male every day. non-choosing ni, nr and na females encountered, respectively, ... | 1998 | 9632504 |
| effect of a formulation of bacillus thuringiensis berliner var. kurstaki on podisus nigrispinus dallas (heteroptera: pentatomidae: asopinae). | | 1998 | 9709021 |
| spermiogenesis in phytophagous bug (hemiptera, pentatomidae): an ultrastructural study. | ultrastructural and immunocytochemical studies were carried out on spermiogenesis in two species of phytophagous bug, acrosternum aseadum and nezara viridula. the nucleus development involved changes in the shape and in the degree of chromatin condensation, with specific aggregation patterns of dna-histone complex occurring during this process. the acrosome showed a three-layered and the acrosomal content a paracrystalline arrangement. the axoneme presented a 9 + 9 + 2 microtubule pattern and br ... | 1998 | 9851056 |
| vibrational directionality in the southern green stink bug, nezara viridula (l.), is mediated by female song. | we tested the hypothesis that male southern green stink bugs, nezara viridula (l.), use substrate-borne songs to locate females. we recorded the responses of bugs on plants to the vibrations caused by a prerecorded female song and by an artificial sound. the female song caused males to walk, to respond with the calling and courtship songs and to approach the source of the song with characteristic search behaviour at junctions between branches on the plants. at a junction, a searching male stoppe ... | 1999 | 10600150 |
| population dynamics and effects of oebalus ornatus (hemiptera: pentatomidae) on rice yield and quality in southwestern colombia. | field experiments were conducted from 1989 to 1992 to determine the effects of oebalus ornatus (sailer) on cica 8 rice, oryza sativa l., yield and to study the population dynamics of the insect. the effect of o. ornatus was measured for seven population levels (0, 2, 3, 4, 8, 12, and 24 sexed pairs per 20 panicles) at three stages of grain development (flowering, milk, and soft dough stage). insect feeding during the flowering and milk stages of grain development caused more damage than feeding ... | 2000 | 10826172 |
| vitellin and vitellogenin in the soldier bug, podisus maculiventris: identification with monoclonal antibodies and reproductive response to diet. | a 171,000 m(r )polypeptide of podisus maculiventris (say) (heteroptera: pentatomidae) that constituted 16% of the protein in eggs also constituted up to 25% of the protein in hemolymph of fed females. it was identified as the major or sole apoprotein of vitellogenin. eggs contained major polypeptides of 171, 106, and 51 kda. the hemolymph polypeptide was identified with a polypeptide (vitellin) in egg extracts by comparing molecular weights, specificity of occurrence in fed females, and immunolo ... | 2000 | 10897094 |
| dynamics and seasonal abundance of stink bugs (heteroptera: pentatomidae) in a cotton-soybean ecosystem. | two soybean varieties (early-maturing group v and late-maturing group vii) and two cotton varieties (conventional and transgenic (bt) were grown in adjacent replicated large field plots (approximately 0.1 ha each) at two locations for 3 yr. the dynamics and relative abundance of phytophagous stink bugs within these two crops were observed. the most abundant pentatomid species in both crops for all 3 yr were nezara viridula (l.), acrosternum hilare (say), and euschistus servus (say). several othe ... | 2000 | 10902318 |
| delayed maturity associated with southern green stink bug (heteroptera: pentatomidae) injury at various soybean phenological stages. | delayed maturity in soybean, glycine max (l.) merr., occurred in response to infestation by southern green stink bug, nezara viridula (l.), in 4 yr of field studies. maturity delays followed stink bug infestation that occurred only during the pod set and filling stages (r3-r5.5), and infestations at r3-4 and r5 resulted in delayed maturity more consistently than did infestation at r5.5. infestation levels of six stink bugs per 0.3 m of row for 7-14 d generally were required to delay soybean matu ... | 2000 | 10902319 |
| songs of holcostethus strictus (fabricius): a different repertoire among landbugs (heteroptera: pentatomidae). | songs emitted during mating by male and female holcostethus strictus were recorded as substrate vibrations. spectra of the vibrational signals have a dominant frequency peak between 100 and 260 hz and in this respect reflect the general characteristic of the family pentatomidae. songs of h. strictus differ from the song repertoire of the southern green stink bug nezara viridula (l.) (pentatomidae) in many respects. the female calling and courtship songs differ in echeme and phrase duration. the ... | 2001 | 11254993 |
| ultrastructural and cytochemical studies of the spermatozoa of acrosternum aseadum (hemiptera: pentatomidae) after copulation. | beside the morphofunctional modifications undergone during spermiogenesis, the spermatozoon could undergo other modifications after copulation. since no structural modification occurs in the spermatozoon of acrosternum aseadum after copulation, we used cytochemical studies to show the enzymatic activities variations of acid phosphatase, thiamine pyrophosphatase, glucose-6-phosphatase and cytochrome c oxidase, when the spermatozoon passes through the spermatheca. the enzymatic activity, few hours ... | 2000 | 11297373 |
| correlative studies on the neuroendocrine system during postembryonic development in the bug, chrysocoris stolli wolff (heteroptera: pentatomidae). | | 1978 | 640537 |
| treatment thresholds for stink bugs (hemiptera: pentatomidae) in cotton. | the green stink bug, acrosternum hilare (say), the southern green stink bug, nezara viridula (l), and the brown stink bug, euschistus servus (say), were predominant phytophagous pentatomidae detected during 1995-1997 in cotton in south carolina. these species occurred in similar numbers in conventional and transgenic cotton 'nucotn33b', containing the gene for expression of cryia(c) delta-endotoxin of bacillus thuringiensis berliner variety kurstaki. adult stink bugs moved into cotton from wild ... | 2001 | 11332832 |
| veneza zonata (hemiptera: coreidae)/trypanosomatid relationship: action of hemolymph in vitro and experimental infection. | the defense response of veneza zonata (hemiptera: coreidae) against three different trypanosomatid infections was assessed: (1) strain 714td, a leptomonas which has v. zonata as vector of a plant trypanosomatid, (2) strain 563td, a leptomonas isolated from the digestive tract of euchistus heros (hemiptera: pentatomidae), and (3) leishmania (l.) amazonensis, a human parasite that cannot infect v. zonata. experiments with v. zonata hemolymph showed agglutination only of l. (l.) amazonensis culture ... | 2001 | 11356050 |
| nuclear changes and acrosome formation during spermiogenesis in euchistus heros (hemiptera: pentatomidae). | ultrastructural and cytochemical studies were carried out on nuclear changes and acrosome formation during the spermiogenesis of the phytophagous bug euchistus heros. the development of the nucleus involves changes in the shape and in degree of chromatin condensation: initially it is dispersed and with a low-electron density, then assumes a fibrillar arrangement and finally compacts in an electron-dense material. the acrosome is formed by the golgi complex and presents unusual morphological feat ... | 2001 | 11469543 |
| egg parasitoids of podisus sculptus distant (heteroptera: pentatomidae) in an eucalyptus plantation in the brazilian amazonian region. | | 2000 | 11487944 |
| detection of calcium and calmodulin during spermiogenesis of phytophagous bugs (hemiptera: pentatomidae). | the ultrastructural detection of calcium using pyroantimonate, and the immunocytochemical localization of calmodulin using monoclonal antibody were carried out during the spermiogenesis of phytophagous bugs. the presence of calcium was observed on the golgi apparatus during the initial phases of spermiogenesis. in the other stages the calcium was observed in association with the nucleus and in some regions of acrosome. indeed, it was detected surrounding the mitochondrial derivatives and specifi ... | 2001 | 11594335 |
| identification and synthesis of male-produced sex pheromone components of the stink bugs chlorochroa ligata and chlorochroa uhleri. | the reproductive behaviors of the stink bugs chlorochroa ligata and c. uhleri were studied in the laboratory. adults of both species became sexually mature about 12-14 days after the final molt, and both sexes mated multiple times during their lifetimes. the mean duration of copulation was 54 +/- 24 min for virgin bugs and 46 +/- 33 min for experienced bugs for c. ligata and 78 +/- 55 min for field-collected c. uhleri of unknown mating status. male c. ligata were found to transfer a significant ... | 2001 | 11710612 |
| life table parameters, reproductive rate, intrinsic rate of increase, and estimated cost of rearing podisus maculiventris (heteroptera: pentatomidae) on an artificial diet. | the impact of an insect-free artificial diet provided at nymphal and/or adult stage upon the developmental rate, life table parameters, and fertility table parameters was examined for podisus maculiventris (say). this study showed that when fed an insect-free artificial diet during both the nymphal and adult stage, developmental time was prolonged, preoviposition period was extended, and reproductive rate (r0) and intrinsic rate of increase (r) were significantly lower than when fed larval insec ... | 2001 | 11777035 |
| field attraction of the stink bug euschistus conspersus (hemiptera: pentatomidae) to synthetic pheromone-baited host plants. | the attraction of the stink bug euschistus conspersus uhler to sources of the synthetic pheromone component methyl (2e,4z)-decadienoate was investigated in a series of field experiments in native vegetation surrounding commercial apple orchards in washington. in experiments with pheromone lures placed inside two different tube-type traps, stink bugs were attracted to the immediate area around traps in large numbers, but very few were caught in the traps. pheromone lures attached directly to the ... | 2001 | 11777055 |
| genetic variability of trypanosomatids isolated from phytophagous hemiptera defined by morphological, biochemical, and molecular taxonomic markers. | in the present study, we investigated the genetic variability among 49 new isolates of trypanosomatids from phytophagous hemiptera by means of morphological characters, growth features, and biochemical (enzymes of ornithine-arginine cycle) and molecular markers (based on spliced-leader, and ribosomal genes). from 402 phytophagous insects dissected and examined for the presence of trypanosomatids, 228 species belonging to pyrrhocoridae, coreidae, lygaeidae, and pentatomidae families harbored tryp ... | 2001 | 11780818 |
| skin lesions caused by stink bugs (insecta: heteroptera: pentatomidae): first report of dermatological injuries in humans. | | 2002 | 11929062 |
| the long and short of sperm polymorphisms in insects. | production of more than one morphological type of sperm in a common testis has been documented for a variety of invertebrates, including gastropods, spiders, centipedes, and insects. this unusual phenomenon is difficult to explain by current theory, particularly since available evidence indicates that one sperm type is often incapable of effecting fertilization. in this review we critically examine evidence on the distribution and development of sperm heteromorphisms among insects in light of co ... | 2002 | 12056745 |
| color changes in halyomorpha brevis (heteroptera: pentatomidae) correlated with distribution of pteridines: regulation by environmental and physiological factors. | halyomorpha brevis (heteroptera: pentatomidae) produces adults with different color patterns, most noticeable in the sternum. the color, ranging from ivory to red, depends on the extent of the accumulation of red pigment. the present work investigated the effects of photoperiod, temperature and aging on the pigmentation. the red pigment was identified as erythropterin by comparing the rf with standard pteridines in paper chromatography in three solvent systems. erythropterin was found in all org ... | 2002 | 12091111 |
| eggs of the stink bug acrosternum (chinavia) marginatum (hemiptera: pentatomidae): a scanning electron microscopy study. | the morphology of the outer face of the eggshell, its appearance in cross fractures and the surface morphology of the inner face are described in the green stink bug acrosternum (chinavia) marginatum (hemiptera: pentatomidae) using scanning electron microscopy. deposited eggs are barrel-shaped and the surface consists of hexagonally arranged, funnel-shaped pits that possess transverse diaphragms in their slender, basal portions. only minor differences are detectable between the central portion o ... | 2002 | 12117274 |
| sub-lethal effects of deltamethrin on walking behaviour and response to host kairomone of the egg parasitoid trissolcus basalis. | the lethal doses of the pyrethroid deltamethrin were estimated for the egg parasitoid trissolcus basalis (wollaston) (hymenoptera: scelionidae), and the sub-lethal effects of an ld25 on female walking behaviour were evaluated. linear speed of treated parasitoids was reduced compared with that of untreated ones for a period of up to 24 h. the sub-lethal effects of deltamethrin on parasitoid response to patches contaminated by a contact kairomone from its host, nezara viridula l (heteroptera: pent ... | 2002 | 12146166 |
| development and implementation of a reduced risk peach arthropod management program in new jersey. | we implemented a 2-yr program to reduce organophosphorus and carbamate insecticide use and mitigate their associated risks as they relate to peach production in new jersey and elsewhere. the main thrust integrated mating disruption with ground cover management practices to reduce oriental fruit moth, grapholita molesta (busck) (lepidoptera: tortricidae), and tarnished plant bug, lygus lineolaris (palisot de beauvois) (heteroptera: miridae), abundance and damage. this reduced risk peach arthropod ... | 2002 | 12216824 |
| natural enemies of coelomera lanio (coleoptera: chrysomelidae) in the region of viçosa, minas gerais, brazil. | coelomera lanio (coleoptera: chrysomelidae) is the most important defoliator of cecropia trees. natural enemies of c. lanio collected in the region of viçosa, state of minas gerais, brazil were identified on field observations in a forest fragment and on laboratory analyses. individuals of c. lanio were not found on cecropia pachystachya trees colonized by azteca mülleri (hymenoptera: formicidae). the majority of the egg masses of c. lanio collected in the field were found to be parasitised by a ... | 2002 | 12298235 |
| [population growth rate of the depredating podisus nigrispinus (heteroptera: pentatomidae) and of the tuta absoluta (leptoptera: gelechiidae) in wintering place]. | the fertility life table of podisus nigrispinus (dallas) (heteroptera: pentatomidae) preying either on tuta absoluta (meyrick) (lepidoptera: gelechiidae) caterpillars or on alternative prey tenebrio molitor l. (coleoptera: tenebrionidae) under greenhouse conditions (30 +/- 5 degrees c, 61 +/- 23% rh) were studied. the life table was also determined for the pest t. absoluta under the same conditions. the net reproductive rate (ro) and the intrinsic rate of natural increase (rm) were higher 14.13 ... | 2002 | 12298240 |
| kairomone strains of euclytiaflava (townsend), a parasitoid of stink bugs. | tachinid flies commonly use the pheromones and allomones of stink bugs (pentatomidae) as host-finding kairomones. pheromone-baited traps for predaceous (podisus spp.) and phytophagous (euschistus spp.) pentatomids were used to obtain tachinid parasitoids in order to study the semiochemical relationships between these parasitic flies and their stink bug hosts. gas chromatography-electroantennogram detector (gc-ead) experiments and field tests were conducted to determine if pheromone strains of th ... | 2002 | 12371810 |
| communication with substrate-borne signals in small plant-dwelling insects. | vibratory signals of plant-dwelling insects, such as land bugs of the families cydnidae and pentatomidae, are produced mainly by stridulation and/or vibration of some body part. signals emitted by the vibratory mechanisms have low-frequency characteristics with a relatively narrow frequency peak dominant around 100 hz and differently expressed frequency modulation and higher harmonics. such spectral characteristics are well tuned to the transmission properties of plants, and the low attenuation ... | 2003 | 12414736 |
| sex attractant pheromone of the red-shouldered stink bug thyanta pallidovirens: a pheromone blend with multiple redundant components. | the male-produced sex pheromone of the red-shouldered stink bug, thyanta pallidovirens (stål) (hemiptera: pentatomidae) consists of a blend of methyl (e2,z4,z6)-decatrienoate (e2,z4,z6-10:coome), and the sesquiterpenes (+)-alpha-curcumene, (-)-zingiberene, and (-)-beta-sesquiphellandrene. in laboratory bioassays, sexually mature males attracted sexually mature females but not males, and females did not attract either sex. extracts of volatiles collected from sexually mature males contained compo ... | 2002 | 12449507 |
| photophase influence on the reproductive diapause, seasonal morphs, and feeding activity of euschistus heros (fabr., 1798) (hemiptera: pentatomidae). | laboratory studies were conducted to verify the influence of photophase on diapause incidence in the neotropical brown stink bug, euschistus heros (fabr., 1798), fed with soybean [glycine max (l.)] merrill pods. nymphs were maintained at three different photophases: 10 h, 12 h, and 14 h, with constant temperature of 25 +/- 1 degree c and relative humidity of 65 +/- 5%. with 14 h, approximately 100% of the adults showed mature reproductive organs; the shoulder (spine) length was significantly gre ... | 2002 | 12489395 |
| life history and cost analysis for continuous rearing of podisus maculiventris (say) (heteroptera: pentatomidae) on a zoophytophagous artificial diet. | the impact of a zoophytophagous, insect-free artificial diet upon the developmental rate, life table parameters, and fertility table parameters was examined over 11 consecutive generations for domesticated and wild colonies of podisus maculiventris (say) (heteroptera: pentatomidae). this study showed that the developmental time, preoviposition period, fecundity, and nymphal survival improved in the domestic colony when fed an insect-free artificial diet for 11 consecutive generations, but remain ... | 2002 | 12539826 |
| relative effects of the insecticide thiamethoxam on the predator podisus nigrispinus and the tobacco whitefly bemisia tabaci in nectaried and nectariless cotton. | the predaceous stinkbug podisus nigrispinus (dallas) (heteroptera: pentatomidae) feeds on plants as well as on arthropod prey. the question arises whether feeding on plants might expose the predator to systemic insecticide via ingestion of the active ingredient or its metabolites through plant sap of treated plants. this interaction was investigated with nectaried and nectariless cotton plants cropped in pots and treated with the systemic insecticide thiamethoxam at 0.5, 1.0 and 2.0 mg per plant ... | 2003 | 12639049 |
| variability of vibratory signals and mate choice selectivity in the southern green stink bug. | the southern green stink bug, nezara viridula, has a complex mate recognition system that implicates chemical and acoustic signals. to localise a sexual partner acoustically, a male and female alternate between the male courtship song (mcrs) and the female calling song type 1 (fcs1). although previous research has revealed that both signals show geographical variability, until now no studies have explored the form of this variability. we analysed the temporal and spectral characteristics of mcrs ... | 2003 | 12642169 |
| optical illusions in scanning electron micrographs: the case of the eggshell of acrosternum (chinavia) marginatum (hemiptera: pentatomidae). | scanning electron microscopy revealed that-as is common in this family of the hemiptera-the eggs of the green stink bug acrosternum (chinavia) marginatum are roughly barrel-shaped and possess at their apical pole a row of slender extensions, the aero-micropylar processes. the outer surface of the eggshell carries hexagonally arranged pits. the analysis of cross-fractured eggshells showed that the pits have slender basal extensions with transverse diaphragms. when scanning electron micrographs of ... | 2003 | 12694858 |
| entering diapause is a prerequisite for successful cold-acclimation in adult graphosoma lineatum (heteroptera: pentatomidae). | in diapause adults of graphosoma lineatum overwintering in a field-cage, high chill-tolerance (ct) developed gradually, within 5 months from august to december. in laboratory-acclimation experiments, the diapause state appeared to be an essential pre-condition for successful cold-acclimation and overwintering. first, diapause prevented elevation of the median supercooling point (scp) by about 5.5 degrees c that accompanies the onset of reproductive activity in non-diapause specimens. second, dia ... | 2002 | 12770026 |
| effect of age, diet, diapause and juvenile hormone on oogenesis and the amount of vitellogenin and vitellin in the twospotted stink bug, perillus bioculatus (heteroptera: pentatomidae). | vitellogenic oocytes from perillus bioculatus have two native vitellins, vt1 and vt2, with molecular masses of 553 and 228 kda, respectively. the hemolymph contains a major vitellogenin, vg, with a molecular mass of 528 kda that consists of three apoproteins with masses of 177, 84 and 59 kda, respectively. antibodies to purified vt2 reacted with ovary extracts, egg extracts and female hemolymph, but not with male hemolymph in immunodiffusion tests. western blots showed that anti vt2 reacted with ... | 2002 | 12770097 |
| influence of herbicide tolerant soybean production systems on insect pest populations and pest-induced crop damage. | conventional soybean weed management and transgenic herbicide-tolerant management were examined to assess their effects on soybean insect pest populations in south georgia in 1997 and 1998. soybean variety had very little impact on the insect species observed, except that maturity group effects were observed for stink bug, primarily nezara viridula (l.), population densities on some sampling dates. stink bugs were more abundant on the early maturing varieties in mid-season. velvetbean caterpilla ... | 2003 | 12852606 |
| flavonoid increase in soybean as a response to nezara viridula injury and its effect on insect-feeding preference. | the ability of the stink bug (nezara viridula) to induce and/or increase production of chemical defenses, i.e., flavonoids, in immature seeds of five genotypes of soybean (br-16, iac-100, pi 227687, pi 229358, and pi 274454) was investigated under greenhouse and laboratory conditions. samples from pods of each genotype damaged by stink bug were analyzed for flavonoid content with high performance liquid chromatography. a dual-choice test was conducted to evaluate the feeding preference of n. vir ... | 2003 | 12857032 |
| effects of photoperiod, temperature and melatonin on nymphal development, polyphenism and reproduction in halyomorpha halys (heteroptera: pentatomidae). | influences of photoperiod, temperature and melatonin were examined on development and color patterns of nymphs, and sternum color and reproductive fate of adults in halyomorpha halys (brevis). short-day accelerated nymphal development, whereas long-day accelerated reproductive maturation. the two types of photoperiodic responses at different stages may help maintain the univoltinism of this species in the field, assuring the right timing for diapause and reproduction. the pronotum of fifth insta ... | 2003 | 12951401 |
| [infestation of wheat grain with eurygaster, pentatomidae following irrigation]. | | 1954 | 13220482 |
| leptomonas serpens n. sp., parasitic in the digestive tract and salivary glands of nezara viridula (pentatomidae) and in the sap of solanum lycopersicum (tomato) and other plants. | | 1957 | 13504849 |
| compound sex-chromosome mechanism and regularly-occurring meiotic aberrations in the spermatogenesis of macropygium reticulare (pentatomidae-hemiptera). | | 1957 | 13523654 |
| [rice bug: mormidea poecila dallas, 1851 in french guiana (hemiptera, hemiptera pentatomidae)]. | | 1957 | 13560044 |
| [hemiptera: pentatomidae]. | | 1958 | 13597095 |
| studies on the cephalic incretory pathways of chrysocoris stolli wolff (pentatomidae: hemiptera). | | 1960 | 13703345 |
| the relationship between dna content and alternative meiotic patterns in certain discocephalinids (pentatomidae; heteroptera). | | 1961 | 13728793 |
| cytological and evolutionary implications of aberrant chromosome behavior in the harlequin lobe of some pentatomidae (heteroptera). | | 1960 | 14443523 |
| insect oviposition induces volatile emission in herbaceous plants that attracts egg parasitoids. | the egg parasitoid trissolcus basalis (wollaston) (hymenoptera: scelionidae) responded to synomones emitted by leguminous plants induced by feeding and oviposition activity of the bug nezara viridula (l.) (heteroptera: pentatomidae). this was shown by laboratory bioassays using a y-tube olfactometer. broad bean leaves (vicia faba l.) damaged by feeding activity of n. viridula and on which host egg mass had been laid produced synomones that attracted t. basalis. by contrast, undamaged leaves or f ... | 2004 | 14638832 |
| biotransfer of selenium: effects on an insect predator, podisus maculiventris. | the effects of selenium (se) accumulation in phytophagous insects on predators in the next trophic level were investigated. the generalist predator podisus maculiventris say (hemiptera: pentatomidae) was fed an herbivore spodoptera exigua (hübner) (lepidoptera: noctuidae) larvae from control diet and diets at two se levels (0, 109, and 135 microg/g sodium selenate dry weight added). predators reared on larvae grown on diets with sodium selenate took longer to complete each developmental stage an ... | 2003 | 14680330 |
| behaviour of ring bivalents in holokinetic systems: alternative sites of spindle attachment in pachylis argentinus and nezara viridula (heteroptera). | heteropteran chromosomes are holokinetic; during mitosis, sister chromatids segregate parallel to each other but, during meiosis, kinetic activity is restricted to one pair of telomeric regions. this meiotic behaviour has been corroborated for all rod bivalents. for ring bivalents, we have previously proposed that one of the two chiasmata releases first, and a telokinetic activity is also achieved. in the present work we analyse the meiotic behaviour of ring bivalents in pachylis argentinus (cor ... | 2003 | 14712858 |
| biology of brontocoris tabidus (heteroptera: pentatomidae) fed with musca domestica (diptera: muscidae) larvae. | development and reproductive performance of brontocoris tabidus (signoret) (heteroptera: pentatomidae) fed with musca domestica l. (diptera: muscidae) larvae was evaluated. duration of the nymphal phase of this predator was 31.2 days, with a 44.1% survival rate. preoviposition and egg incubation periods and number of eggs/egg mass were 8.14 days, 5.6 days, and 45.4, respectively. b. tabidus presented 44.7% egg viability. female longevity of this predator was 18.4 days. results are discussed base ... | 2003 | 14758705 |
| wild hosts of pentatomids: ecological significance and role in their pest status on crops. | phytophagous stink bugs (heteroptera: pentatomidae) are important pests of many crops, feeding mostly on seeds and immature fruits. during feeding they introduce their stylets to remove the cells' contents. the resulting damage includes drop and/or malformation of seeds and fruits. as stink bugs are generally polyphagous, they feed on cultivated and uncultivated plants; consequently, wild host plants play an important role in the increase in population levels of agricultural pest species. these ... | 1997 | 15012309 |
| photoperiod influence on the biology and phenological characteristics of dichelops melacanthus (dallas, 1851) (heteroptera: pentatomidae). | the influence of the photoperiod on the biology and seasonal morphs of dichelops melacanthus (dallas, 1851) was studied in the laboratory. four different photoperiods (11, 12, 13, and 14 hl = hours of light) were tested, keeping the temperature at 25 +/- 1 masculine c and the relative humidity at 65 +/- 5%. nymph developmental time tended to be longer under shorter photophases (11 and 12 hl). the 14-hour photophase (long day) resulted in lower nymph mortality rates. females maintained at 13 and ... | 2004 | 15029376 |
| characterization of the imaginal reproductive diapause of oebalus poecilus (dallas) (hemiptera: pentatomidae). | the state of development of the internal reproductive organs of male and female oebalus poecilus (dallas) as well as the body fat amount in the abdominal cavity during hibernation, of individuals sampled in bamboo litter in eldorado do sul (30 masculine 02's and 51 degrees 23'w), rs, brazil was investigated. females and males showed the abdominal cavity filled with body fat in the beginning of the hibernation phase. the decrease in fat reserve level occurred from august on for males and from oct ... | 2004 | 15029381 |
| the wart-like chorion of edessa bifida (hemiptera: pentatomidae). | there is the suspicion that the stink bug edessa bifida invades cotton fields in southern parts of north america. to assist in the early detection of the bug, the morphology of deposited eggs of e. bifida is described using scanning electron microscopy (sem). the study revealed a surface pattern not yet seen in the pentatomidae. the almost spherical eggs are deposited in batches and fastened both to one another and to the plant surface by secretions in all likelihood produced by the female. the ... | 2003 | 15137688 |
| effects of double-stranded rna in metarhizium anisopliae var. acridum and paecilomyces fumosoroseus on protease activities, conidia production, and virulence. | isogenic strains (with and without dsrna) of the entomogenous fungi metarhizium anisopliae var. acridum and paecilomyces fumosoroseus were investigated for correlation between the presence of dsrna and the production of cuticle-degrading proteases that play an important role in host parasitism, total secreted protein, and conidia production. similar levels of cuticle-degrading subtilisin-like (pr1) protease were observed for isogenic strains of m. anisopliae var. acridum after growth in medium s ... | 2004 | 15213741 |
| identification of volatile synomones, induced by nezara viridula feeding and oviposition on bean spp., that attract the egg parasitoid trissolcus basalis. | bean plants (vicia faba l. and phaseolus vulgaris l.) damaged by feeding activity of nezara viridula (l.) (heteroptera: pentatomidae), and onto which an egg mass had been laid, produced volatiles that attracted the egg parasitoid trissolcus basalis (wollaston) (hymenoptera: scelionidae). extracts of volatiles of broad bean and french bean plants induced by adults of n. viridula as a result of their feeding activity, oviposition activity, and feeding and oviposition activity combined were analyze ... | 2004 | 15274441 |
| comparison of susceptibility of pest euschistus servus and predator podisus maculiventris (heteroptera: pentatomidae) to selected insecticides. | susceptibility of the brown stink bug, euschistus serous (say), and the spined soldier bug, podisus maculiventris (say), to acetamiprid, cyfluthrin, dicrotophos, indoxacarb, oxamyl, and thiamethoxam, was compared in residual and oral toxicity tests. generally, susceptibility of p. maculiventris to insecticides was significantly greater than or not significantly different from that of e. servus. cyfluthrin and oxamyl were more toxic to the predator than to e. servus in residual and feeding tests, ... | 2004 | 15279256 |
| life history and cost analysis for continuous rearing of perillus bioculatus (heteroptera: pentatomidae) on a zoophytogenous artificial diet. | the impact of a zoophytogenous, insect-free artificial diet on the developmental rate, life history parameters, and fertility was examined over 11 consecutive generations for domesticated perillus biocullatus (f.) (heteroptera: pentatomidae). this study showed that when fed an insect-free artificial diet during both the nymphal and adult stages, developmental times were prolonged, and the net reproductive rates (r0) and the intrinsic rates of increase (r(m)) were significantly lower than when fe ... | 2004 | 15279257 |
| emission of plutella xylostella-induced compounds from cabbages grown at elevated co2 and orientation behavior of the natural enemies. | several plant species defend themselves indirectly from herbivores by producing herbivore-induced volatile compounds that attract the natural enemies of herbivores. here we tested the effects of elevated atmospheric co(2) (720 micromol mol(-1)) concentration on this indirect defense, physiological properties, and constitutive and induced emissions of white cabbage (brassica oleracea ssp. capitata, cvs lennox and rinda). we monitored the orientation behavior of the generalist predator podisus mac ... | 2004 | 15299116 |
| chemical and physical signals mediating conspecific and heterospecific aggregation behavior of first instar stink bugs. | we investigated cues that mediate the aggregation behavior of immature pentatomid bugs by using nymphs of six different pentatomid bug species (nezara viridula, acrosternum hilare, chlorochroa ligata, chlorochroa sayi, thyanta pallidovirens, and euschistus conspersus). when first instars of any two species were put together in a petri dish, they readily formed heterospecific aggregations similar to their natural conspecific aggregations. the chemical profiles of first and second instar nymphs of ... | 2004 | 15303327 |
| influence of cover crops on insect pests and predators in conservation tillage cotton. | in fall 2000, an on-farm sustainable agricultural research project was established for cotton, gossypium hirsutum l., in tift county, georgia. the objective of our 2-yr research project was to determine the impact of several cover crops on pest and predator insects in cotton. the five cover crop treatments included 1) cereal rye, secale cereale l., a standard grass cover crop; 2) crimson clover, trifolium incarnatum l., a standard legume cover crop; 3) a legume mixture of balansa clover, trifoli ... | 2004 | 15384330 |
| development and reproduction of podisus distinctus (heteroptera: pentatomidae) fed on larva of bombyx mori (lepidoptera: bombycidae). | biological control has been reducing the use of chemical products against insect pests, especially predatory pentatomidae. species of this group can present high variations in their life cycle as a result of their diet. thus, the objective of this research was to study nymph development and reproduction of podisus distinctus (stäl, 1860) (heteroptera: pentatomidae) fed on bombyx mori l., 1758 (lepidoptera: bombycidae) larvae (t1), compared to those fed on tenebrio molitor l., 1758 (coleoptera: t ... | 2004 | 15462296 |
| nymphal development and feeding preference of podisus maculiventris (heteroptera: pentatomidae) on eggs of ephestia kuehniella (lepidoptera: pyralidae) parasitised or not by trichogramma brassicae (hymenoptera: trichogrammatidae). | predation by podisus maculiventris nymphs, a predatory pentatomid, was evaluated with eggs of the flour moth ephestia kuehniella (pyralidae), parasitised or not by trichogramma brassicae (pupae stage). eggs of this pyralid were glued on rectangular cardboard and presented to nymphs of p. maculiventris as food. the pentatomid successfully reached adult stage when feeding on unparasitised eggs, indicating that flour moth eggs can be used as a factitious food for rearing this predator. pentatomid n ... | 2004 | 15622843 |
| boll injury and yield losses in cotton associated with brown stink bug (heteroptera: pentatomidae) during flowering. | brown stink bug, euschistus servus (say), was infested on cotton, gossypium hirsutum l., plants during reproductive stages to determine the effects on boll injury and seedcotton yield. during each week in 2002 and 2003, significantly more bolls with > or = 1 injured locule, bolls with > or = 2 injured locules, and bolls with discolored lint were recorded on stink bug-infested plants compared with that on noninfested plants. significantly fewer bolls displayed external injury on the boll exocarp ... | 2004 | 15666747 |
| impacts of biological control and invasive species on a non-target native hawaiian insect. | the potential for classical biological control to cause unintended harm to native species was evaluated in the case of the endemic hawaiian koa bug, coleotichus blackburniae white (hemiptera: scutelleridae), and parasitoids introduced to hawaii for control of an agricultural pest, the southern green stink bug, nezara viridula (l.) (hemiptera: pentatomidae). parasitism of c. blackburniae eggs, nymphs and adults by biocontrol agents was quantified across a wide range of habitats and compared to ot ... | 2004 | 15688213 |
| cotton boll age influences feeding preference by brown stink bug (heteroptera: pentatomidae). | cotton plants were infested with brown stink bug, euschistus servus (say), to define cotton boll age classes (based on heat unit accumulation beyond anthesis) that are most frequently injured during each of the initial 5 wk of flowering. bolls from each week were grouped into discrete age classes and evaluated for the presence of stink bug injury. brown stink bug injured significantly more bolls of age class b (approximately 165-336 heat units), age class c (approximately 330-504 heat units), an ... | 2005 | 15765668 |
| monitoring stink bugs (hemiptera: pentatomidae) in mid-atlantic apple and peach orchards. | pyramid traps coated with "industrial safety yellow" exterior latex gloss enamel paint and baited with euschistus spp. aggregation pheromone, methyl (2e,4z)-decadienoate captured more stink bugs than all other baited and unbaited trap types in both apple and peach orchards in 2002 and 2003. commercial sources of dispensers of methyl (2e,4z)-decadienoate deployed in association with pyramid traps had a significant impact on trap captures. captures in pyramid traps were four-fold greater when bait ... | 2005 | 15765676 |
| toxicity of insecticides in a glass-vial bioassay to adult brown, green, and southern green stink bugs (heteroptera: pentatomidae). | adult brown, euschistus servus (say); green, acrosternum hilare (say); and southern green, nezara viridula (l.), stink bugs were collected from soybean, glycine max (l.) merr., in fall 2001 and 2002 near stoneville, ms, and eudora, ar. a glass-vial bioassay was used to determine lc50 values for the three species of stink bugs for the pyrethroids bifenthrin, cypermethrin, cyfluthrin, lambda-cyhalothrin, and permethrin, and the organophosphates acephate, dicrotophos, malathion, and methyl parathio ... | 2005 | 15765680 |
| tuning of host plants with vibratory songs of nezara viridula l (heteroptera: pentatomidae). | songs of the southern green stink bug nezara viridula l, recorded on a non-resonant loudspeaker membrane, reflect frequency characteristics of body vibrations. the song dominant frequency directly depends on the repetition rate of potentials recorded from synchronously contracting muscles that vibrate the abdomen during singing. spectra of naturally emitted signals recorded on the pronotum of a singing bug or on a plant contain peaks characteristic of plant resonant spectra. the dominant resonan ... | 2005 | 15802672 |
| fertility and life expectancy of the predator supputius cincticeps (heteroptera: pentatomidae) exposed to sublethal doses of permethrin. | the stinkbug supputius cincticeps (stål) (heteroptera: pentatomidae) can be found in agricultural and forest ecosystems feeding primarily on larvae of coleoptera and lepidoptera, where it can be exposed to insecticide applications. this study therefore aimed to evaluate the reproductive potential of s. cincticeps after exposition to sublethal doses of permethrin (5.74 x 10(-3), 5.74 x 10(-2), 5.74 x 10(-1), 5.74 and 57.44 ppb) through the use of a fertility life table. the development cycle of t ... | 2005 | 15977408 |
| effect of diet on male reproductive tract of podisus nigrispinus (dallas) (heteroptera: pentatomidae). | the morphology and histology of the reproductive tract of males of the predator podisus nigrispinus (dallas) fed on different diets were studied. p. nigrispinus was fed on diets of: larvae of alabama argillacea (hübner), tenebrio molitor l., musca domestica l., and an artificial diet. the male reproductive tract, independent of diet, showed testes with intense red coloration in a compact, circular, or slightly oval structure. the vasa deferentia were similar in color to the testes and formed lon ... | 2005 | 16025907 |
| partial morphological and functional characterization of the corpus allatum-corpus cardiacum complex from the two-spotted stinkbug, perillus bioculatus (hemiptera: pentatomidae). | selected morphological and physiological properties of the corpus allatum (ca)-corpus cardiacum (cc) complex from the two-spotted stinkbug, perillus bioculatus (hemiptera: pentatomidae), were studied. the cas play an important role in insect physiology because of their production of the juvenile hormones (jhs), i.e., key hormones involved in development and reproduction. we found that the p. bioculatus ca-cc complex is present in two distinct morphological forms, the more frequently observed com ... | 2005 | 16029075 |
| effect of sub-lethal concentrations of permethrin on ovary activation in the predator supputius cincticeps (heteroptera: pentatomidae). | insecticides may cause mortality and deleterious effects on predatory stinkbugs. for this reason, the effect of five concentrations of permethrin applied on third instar nymphs of supputius cincticeps (stål) (heteroptera: pentatomidae) was investigated on ovary activation in this predator. the nymphs received topical application of permethrin in the following concentrations (mg a.i./ml): 10(-7), 10(-6), 10(-5), 10(-4), and 10(-3). ovary lengths and oocyte numbers were quantified following first ... | 2005 | 16097731 |
| precocious induction of vitellogenin with jh iii in the twospotted stink bug, perillus bioculatus (heteroptera: pentatomidae). | the effect of juvenile hormone (jh) iii on the hemolymph composition of vitellogenin was examined in perillus bioculatus. adult females were treated topically with jh iii, and the premature presence of vitellogenin in the hemolymph was then detected using electrophoresis and western blot analyses. jh iii treatment resulted in a dose-dependent early production of vitellogenin that was detectable 48 h before vitellogenin was present in non-treated insects. vitellogenin was not observed in the hemo ... | 2005 | 16129637 |
| development and predation of picromerus bidens (heteroptera: pentatomidae) on spodoptera littoralis (lepidoptera: noctuidae) at different constant temperatures. | | 2005 | 16366301 |