01910nas a2200289   4500008004100000020001400041245012400055210006900179260001000248300001000258490000800268520107300276653001401349653002101363653002601384653001001410653001501420653002001435653002601455653001301481653001501494100002101509700001701530700001401547700001801561856004101579       2005                        eng d  a0931-204800aDevelopment of a semiochemical-based trapping method for the New Guinea sugarcane weevil, Rhabdoscelus obscurus in Guam0 aDevelopment of a semiochemicalbased trapping method for the New   cMarch  a65-690 v1293 aAggregation pheromone of the Australian population of New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval), in conjunction with other semiochemicals, was used to develop an efficient trapping method for the weevil population in Guam. In a field experiment at Yigo, plastic bucket traps baited with the lure of the Australian R. obscurus population in combination with ethyl acetate and cut sugarcane captured significantly more weevils than traps baited with pheromone + ethyl acetate, pheromone + sugarcane or individual lure components alone. Traps baited with various semiochemical-based lures and treated with insecticide captured significantly greater numbers of weevils than those not treated with insecticide. Traps baited with cut sugarcane caught significantly more weevils than those without sugarcane. Semiochemical-based trapping in weevil management has potential either in mass trapping or as part of an integrated pest management (IPM) programme. Based on the present findings, a future line of work for the control of this weevil is proposed.10aBehaviour10aChemical signals10aCollecting techniques10aHosts10aLand zones10aOceanic islands10aPacific Ocean islands10aparasite10aTechniques1 aREDDY, G., V. P.1 aCruz, Z., T.1 aBAMBA, J.1 aMUNIAPPAN, R.  u<Go to ISI>://ZOOREC:ZOOR1410704085101404nas a2200193   4500008004100000020001400041245011000055210006900165260000800234300001200242490000800254520073800262653002201000100001701022700001501039700001801054700001801072856012001090       2010                        eng d  a0931-204800aThe effect of mass-rearing on death-feigning behaviour in the sweet potato weevil (Coleoptera: Brentidae)0 aeffect of massrearing on deathfeigning behaviour in the sweet po  cSep  a652-6580 v1343 aThe aim of our study was to examine the effect of mass-rearing, in which there is no exposure to predators, on antipredator traits of insects for improving sterile insect technique programs. The duration of death-feigning (antipredator behaviour) in sweet potato weevil Cylas formicarius (Summers) (Coleoptera: Brentidae) after mass-rearing for 71 generations were compared with those in wild strain. There was no significant difference in the duration of death-feigning between wild and mass-reared strains. This indicated that the death-feigning behaviour of mass-reared strain was maintained for 71 generations even in the absence of,predators. We discuss the reasons why death-feigning behaviour is maintained after mass-rearing.10aCylas formicarius1 aKuriwada, T.1 aKumano, N.1 aShiromoto, K.1 aHaraguchi, D.  uhttps://weevil.myspecies.info/effect-mass-rearing-death-feigning-behaviour-sweet-potato-weevil-coleoptera-brentidae02159nas a2200181   4500008004100000020001400041245010300055210006900158260001300227300001200240490000800252520152000260653002001780100001601800700002201816700001601838856012301854       2011                        eng d  a0931-204800aIps typographus population development after a severe storm in a nature reserve in southern Sweden0 aIps typographus population development after a severe storm in a  cFebruary  a132-1410 v1353 aLarge-scale natural disturbances pose challenges for the management of protected areas and may have undesirable consequences for commercial plantations nearby. A storm, which felled nearly 10 000 m3 of spruce forest in the Osaby nature reserve in southern Sweden, allowed us to study the subsequent population development of the spruce bark beetle (Ips typographus L.). Two summers after the storm, an exceptionally high proportion (74%) of wind-felled trees had been successfully colonized by the bark beetle, and all living spruce trees had been killed. On standing trees, colonization density was three times higher, and reproductive success one-fourth, that on wind-felled trees. The negative relationship between colonization density and reproductive success indicates that intra-specific competition is one of the main mechanisms reducing I. typographus population growth when the beetles switch from wind-felled to standing trees after storm disturbances. Indeed, there was no significant difference in beetle production between wind-felled and standing trees. Furthermore, there were no differences in colonization density, reproductive success or production at different heights in standing trees; however, a higher proportion of the new adults emerged at the tree-tops rather than lower down before overwintering. Our results also demonstrate that a large proportion (ca. 50%) of the I. typographus population that developed in the storm-fell area apparently overwintered under the bark of standing trees.10aIps typographus1 aKomonen, A.1 aSchroeder, L., M.1 aWeslien, J.  uhttps://weevil.myspecies.info/ips-typographus-population-development-after-severe-storm-nature-reserve-southern-sweden01636nas a2200169   4500008004100000020001400041245010700055210006900162260001400231300001200245490000800257520102700265653002201292100001801314700001701332856011701349       2007                        eng d  a0931-204800aFungal flora associated with Tomicus piniperda L. in an area close to a timber yard in southern Poland0 aFungal flora associated with Tomicus piniperda L in an area clos  cSeptember  a579-5840 v1313 aThe association between Tomicus piniperda L. (Col., Scolytinae) and fungi was studied in a Pinus sylvestris L. forest in Mielec-Mosciska. Fungi were isolated from overwintered adult beetles taken from two stands situated in different distance from timber yard. Two media were used for isolation. The results showed great diversity of fungi associated with T. piniperda: 1895 cultures, representing 64 species, were isolated. Penicillia and Hormonema dematioides were the dominant species, found in 20.2% and 17.8% of all beetles, respectively. A frequently isolated ophiostomatoid fungi was Ophiostoma minus. Qualitative and quantitative differences in the mycobiota composition of this insect between two stands were detected. The highest richness and diversity of fungal species appeared in the samples taken from the location where the trees were heavily damaged by shoot-feeding of T. piniperda. Differences were most clear for the pathogenic O. minus, which was a common fungal associate of the insects in this stand.10aTomicus piniperda1 aJankowiak, R.1 aBilanski, P.  uhttps://weevil.myspecies.info/fungal-flora-associated-tomicus-piniperda-l-area-close-timber-yard-southern-poland02375nas a2200325   4500008004500000020001400045245006600059210006600125300001200191490000800203520132400211653003401535653002701569653002401596653002201620653002601642653001901668653002201687653002401709653003001733653002301763653003301786653002701819653003401846653002601880653002501906100001201931700001601943856009001959       1990                        Engldsh    a0931-204800aEffects of wood ants on weevil community inhabiting oak trees0 aEffects of wood ants on weevil community inhabiting oak trees  a483-4880 v1103 aAnt effects on the community of weevils were studied in a Quercus dentata chaparral of Ishikari Coast, northern Japan, where a supercolony of the red wood ant Formica yessensis expands over the dune. A total of 16 species of weevils were collected in the present survey. The dominant species were Myllocerus griseus, Phyllobius longicornis, Rhynchaenus japonicus and Scythropus japonicus, constituting 94% of 2485 individuals collected. The total number was more remarkably reduced in ant-abundant areas than in ant-rare areas. In particular, 3 of the 4 dominant species were considerably depopulated by ants. Adults of S. japonicus and P. longicornis were aggressively expelled or hunted on the trees. In R. japonicus, the adults were rarely attacked, however, leaf-mining immatures were remarkably predated by ants. In contrast with those 3 species, the population of M. griseus was enhanced by the presence of the ants which were almost indifferent to this species but frequently eliminated its competitors. [The following taxa are also mentioned: Deporaus unicolor, Neocoenorrhyncus interruptus, Meotiorrhynchus querendus, Pseudocneorhinus bifausciatus, R. varigatus, R. takabayashii, Curculio dentipes, C. antennatus, C. minutissimus, Magdalis ruficornis, Cryptorhynchus electus and Caebicryptorrhyncus frontalis].10aCaebicryptorrhyncus frontalis10aCryptorhynchus electus10aCurculio antennatus10aCurculio dentipes10aCurculio minutissimus10aCurculionoidea10aDeporaus unicolor10aMagdalis ruficornis10aMeotiorrhynchus querendus10aMyllocerus griseus10aNeocoenorrhyncus interruptus10aPhyllobius longicornis10aPseudocneorhinus bifausciatus10aRhynchaenus japonicus10aScythropus japonicus1 aIto, F.1 aHigashi, S.  uhttps://weevil.myspecies.info/effects-wood-ants-weevil-community-inhabiting-oak-trees02363nas a2200193   4500008004100000020001400041245013300055210006900188260001100257300001200268490000800280520163700288653002301925100002201948700002201970700001801992700002402010856013502034       2009                        eng d  a0931-204800aDeltamethrin-induced feeding plasticity in pyrethroid-susceptible and -resistant strains of the maize weevil, Sitophilus zeamais0 aDeltamethrininduced feeding plasticity in pyrethroidsusceptible   cAugust  a524-5320 v1333 aPhenotypic plasticity contributes to the adaptative evolution of populations exposed to new or altered environments. Feeding plasticity is a component of phenotypic plasticity not usually considered in insect strains adapted to insecticide-altered environments, but which may either accentuate or mitigate insecticide resistance. This is a concern in the pyrethroid-resistant strains of the maize weevil Sitophilus zeamais Motsch. (Col., Curculionidae), and the reason for this study. A pyrethroid-susceptible and two pyrethroid-resistant strains of maize weevil were subjected to free-choice and no-choice tests with maize grains sprayed with increasing doses of the pyrethroid, deltamethrin. The insects from the pyrethroid-resistant strains exhibited higher feeding avoidance with increased deltamethrin doses than insects from the susceptible strain when subjected to free-choice tests. The strains of maize weevil physiologically resistant to pyrethroids were also behaviourally resistant to deltamethrin [long dash] an additional management concern. The resistant strains avoid deltamethrin-sprayed grains and are less nutritionally affected by this compound, with divergent responses from the susceptible strain with increased doses of deltamethrin. Furthermore, the higher relative growth rate and consequently higher efficiency of food conversion observed in the insecticide-resistant strains were significant even without insecticide exposure, indicating that these traits are stimulus-independent and may persist even without further insecticide selection, potentially limiting the options available for their management.10aSitophilus zeamais1 aGuedes, N., M. P.1 aGuedes, R., N. C.1 aSilva, L., B.1 aCordeiro, E., M. G.  uhttps://weevil.myspecies.info/deltamethrin-induced-feeding-plasticity-pyrethroid-susceptible-and-resistant-strains-maize-weevil-si01975nas a2200193   4500008004100000020001400041245010800055210006900163260000800232300001200240490000800252520129500260653002301555100002201578700001601600700001901616700002201635856012401657       2010                        eng d  a0931-204800aInsecticide-induced hormesis in an insecticide-resistant strain of the maize weevil, Sitophilus zeamais0 aInsecticideinduced hormesis in an insecticideresistant strain of  cMar  a142-1480 v1343 aSublethal responses to insecticides are frequently neglected in studies of insecticide resistance, although stimulatory effects associated with low doses of compounds toxic at higher doses, such as insecticides, have been recognized as a general toxicological phenomenon. Evidence for this biphasic dose-response relationship, or hormesis, was recognized as one of the potential causes underlying pest resurgence and secondary pest outbreaks. Hormesis has also potentially important implications for managing insecticide-resistant populations of insect-pest species, but evidence of its occurrence in such context is lacking and fitness parameters are seldom considered in these studies. Here, we reported the stimulatory effect of sublethal doses of the pyrethroid insecticide deltamethrin sprayed on maize grains infested with a pyrethroid-resistant strain of the maize weevil (Sitophilus zeamais) (Coleoptera: Curculionidae). The parameters estimated from the fertility tables of resistant insects exposed to deltamethrin indicated a peak in the net reproductive rate at 0.05 ppm consequently leading to a peak in the intrinsic rate of population growth at this dose. The phenomenon is consistent with insecticide-induced hormesis and its potential management implications are discussed.10aSitophilus zeamais1 aGuedes, N., M. P.1 aTolledo, J.1 aCorrea, A., S.1 aGuedes, R., N. C.  uhttps://weevil.myspecies.info/insecticide-induced-hormesis-insecticide-resistant-strain-maize-weevil-sitophilus-zeamais02209nas a2200181   4500008004100000020001400041245018700055210006900242260000900311300001200320490000800332520148200340653002301822100001501845700001501860700001701875856013501892       2009                        eng d  a0931-204800aBiology and host specificity of Aulacobaris fallax (Coleoptera: Curculionidae), a potential biological control agent for dyer's woad, Isatis tinctoria (Brassicaceae) in North America0 aBiology and host specificity of Aulacobaris fallax Coleoptera Cu  cJune  a345-3540 v1333 aDyer's woad, Isatis tinctoria, a plant of Eurasian origin is a problematic weed in western North America against which a classical biological weed control programme was initiated in 2004. Three European insect species were selected as candidate agents to control this invasive species, including the root-mining weevil Aulacobaris fallax. To determine its suitability as an agent, the biology and host specificity of A. fallax were studied in outdoor plots and in the field between 2004 and 2006 in its native European range. Aulacobaris fallax is a univoltine species that lays its eggs from March to August into leaf stalks and roots of dyer's woad. Larvae mine and pupate in the roots and adults emerge from August to October. Up to 62% of the dyer's woad plants at the field sites investigated were attacked by this weevil. In no-choice host-specificity tests, A. fallax attacked 16 out of 39 species and varieties within the Family Brassicaceae. Twelve of these are native to North America. In subsequent multiple-choice tests, seven species, all native to North America, suffered a similar level of attack as dyer's woad, while none of the European species were attacked. Our results demonstrate the importance of including test plant species that have not co-evolved with the respective candidate agent. In sum, we conclude that the risk of non-target effects is too high for A. fallax to be considered as a biological control agent for dyer's woad in the United States.10aAulacobaris fallax1 aGerber, E.1 aCortat, G.1 aHinz, H., L.  uhttps://weevil.myspecies.info/biology-and-host-specificity-aulacobaris-fallax-coleoptera-curculionidae-potential-biological-contro02154nas a2200193   4500008004500000020001400045245010900059210006900168260001400237300001200251490000800263520147100271653002201742100001601764700001501780700001701795700002001812856012801832       2008                        Engldsh    a0931-204800aKairomonal responses of Tomicus destruens (Col., Scolytidae) to host volatiles alpha -pinene and ethanol0 aKairomonal responses of Tomicus destruens Col Scolytidae to host  cSeptember  a654-6620 v1323 aThe Mediterranean pine shoot beetle Tomicus destruens is one of the most damaging bark beetles attacking Mediterranean pine forests in southern Europe and north Africa. We studied the attractiveness of the host volatiles [alpha]-pinene and ethanol at a range of release rates, alone or in combination, to T. destruens, in order to develop an attractive lure for the management of this beetle. T. destruens was attracted slightly to the host volatile [alpha]-pinene, but a strong synergistic effect was found in the attraction towards monoterpene when ethanol was added to the bait. The highest catches of T. destruens were obtained by the optimal blend releasing 300 mg/day of [alpha]-pinene and 900 mg/day of ethanol. In contrast to data reported for the related species T. piniperda, Mediterranean pine shoot beetles were clearly attracted to baits releasing ethanol alone (1350 mg/day). trans-Verbenol, which was also added to host volatiles in some tests, did not affect the response. The use of the attractive blend proposed would have a low impact on the natural enemy population of Thanasimus formicarius because of asynchronies in flight periods. Other non-target insects, such as the facultative predator or competitor Oxipleurus nodieri, were also significantly attracted. These results allow the development of an operative lure for the effective monitoring of T. destruens, although improvements by the addition of other host volatiles should be studied.10aTomicus destruens1 aGallego, D.1 aGalian, J.1 aDiez, J., J.1 aPajares, J., A.  uhttps://weevil.myspecies.info/kairomonal-responses-tomicus-destruens-col-scolytidae-host-volatiles-alpha-pinene-and-ethanol02791nas a2200205   4500008004100000020001400041245015300055210006900208260001000277300001200287490000800299520202900307653001702336100001902353700002102372700001902393700001802412700002102430856013402451       2009                        eng d  a0931-204800aResponse of Dendroctonus brevicomis to different release rates of nonhost angiosperm volatiles and verbenone in trapping and tree protection studies0 aResponse of Dendroctonus brevicomis to different release rates o  cMarch  a143-1540 v1333 aA blend of eight nonhost angiosperm volatiles (benzyl alcohol, benzaldehyde, guaiacol, nonanal, salicylaldehyde, (E)-2-hexenal, (E)-2-hexen-1-ol and (Z)-2-hexen-1-ol) without (NAV) and with (NAVV) (-)-verbenone (4,6,6-trimethylbicyclo[3.1.1]hept-3-en-2-one) were tested at low (L), medium (M) and high (H) release rates for their ability to reduce attraction of western pine beetle, Dendroctonus brevicomis LeConte, to attractant-baited (exo-brevicomin (racemic, 3 mg/d), frontalin (racemic, 3 mg/d) and myrcene (18 mg/d)) multiple funnel traps. NAV-L (40 mg/d) had no significant effect. Verbenone alone (50 mg/d) and NAV-M (240 mg/d) both significantly reduced attraction, but no significant difference was observed between the two treatment means. NAV-H (430 mg/d) significantly reduced catches by [approximately]60% and 78% compared to verbenone alone and the baited control, respectively. In a second experiment, combining (-)-verbenone with NAV (NAVV) increased the effects observed in Experiment 1. NAVV-M (240 mg/d) resulted in an [approximately]69% and 83% reduction in trap catch compared to verbenone alone and the baited control, respectively. Significantly fewer D. brevicomis were captured in NAVV-H (430 mg/d) than any other treatment resulting in an [approximately]93% reduction in trap catch compared to the baited control. In a third experiment, NAVV was tested at three release rates for its ability to protect individual ponderosa pines, Pinus ponderosa Dougl. ex Laws., from attack by D. brevicomis. Cumulative release rates varied in direct proportion to tree diameter, but represented quarter, half and full NAVV rates. NAVV significantly reduced the density of D. brevicomis attacks, D. brevicomis successful attacks, and levels of tree mortality on attractant-baited trees. Only three of 15 NAVV-treated trees died from D. brevicomis attack while [approximately]93% mortality (14/15) was observed in the untreated, baited control. Quarter and half rates were ineffective for reducing tree mortality.10aDendroctonus1 aFettig, C., J.1 aMcKelvey, S., R.1 aDabney, C., P.1 aBorys, R., R.1 aHuber, D., P. W.  uhttps://weevil.myspecies.info/response-dendroctonus-brevicomis-different-release-rates-nonhost-angiosperm-volatiles-and-verbenone02821nas a2200193   4500008004100000020001400041245013800055210006900193260000800262300001200270490000800282520211500290653002002405100001802425700001602443700001402459700002002473856013402493       2012                        eng d  a0931-204800aField response of the six-toothed pine bark beetle, Ips sexdentatus (Col.: Curculionidae, Scolytinae), to pheromonal blend candidates0 aField response of the sixtoothed pine bark beetle Ips sexdentatu  cJul  a431-4440 v1363 aThe identification and description of the chemical signals involved in the aggregation of bark beetles may lead to the development of integrated pest management strategies using synthetic pheromones. Ips sexdentatus Boern. (Col.: Scolytinae) colonizes trees of the Pinus genus across Europe, causing severe damage in occasions. The effect of cis-verbenol, ipsenol, 2-methyl-3-buten-2-ol (MB) and myrtenol in relation to the major pheromonal compound ipsdienol on the aggregation behaviour of I. sexdentatus was studied on four field bioassays. The ternary blend of racemic ipsdienol, cis-verbenol and racemic ipsenol consistently caught the highest number of bark beetles, resulting in large standardized mean differences (dunbiased > 0.8). The binary blends between ipsdienol and ipsenol, and ipsdienol and cis-verbenol also improved the performance of ipsdienol, although only ipsenol did it significantly. On the other hand, catches were reduced (dunbiased = -0.96) when MB was released along ipsdienol, although the effect was found to be non-significant. On a third bioassay, the relative release rates between ipsdienol, ipsenol and cis-verbenol were studied. Although no differences were found between the ternary blends, a ratio of 1 : 0.25 : 0.5 for ipsdienol, ipsenol and cis-verbenol, respectively, scored the strongest effect size (dunbiased = 1.17). A fourth bioassay studied the behavioural effects of myrtenol and found no significant modifications to previously established findings. Myrtenol on its own attracted almost no individuals of I. sexdentatus. High numbers of bark beetle predators Thanasimus formicarius L. and Temnochila caerulea Olivier were trapped during the trials. The binary blend between ipsdienol and ipsdienol was shown to catch the highest significant amount of T. formicarius, whereas numbers of T. caerulea caught were highest on the binary blend between cis-verbenol and ipsdienol. Presented results establish the ternary blend between ipsdienol, ipsenol and cis-verbenol as a reference functional aggregative lure ready to be used on the management of I. sexdentatus.10aIps sexdentatus1 aEtxebeste, I.1 aAlvarez, G.1 aPerez, G.1 aPajares, J., A.  uhttps://weevil.myspecies.info/field-response-six-toothed-pine-bark-beetle-ips-sexdentatus-col-curculionidae-scolytinae-pheromonal02328nas a2200169   4500008004100000020001400041245012200055210006900177260000900246300001200255490000800267520168400275653003201959100001901991700001402010856013402024       2010                        eng d  a0931-204800aScreening of oilseed rape and other brassicaceous genotypes for susceptibility to Ceutorhynchus pallidactylus (Mrsh.)0 aScreening of oilseed rape and other brassicaceous genotypes for   cJuly  a542-5500 v1343 aProduction of oilseed rape, Brassica napus L., is affected by various insect pests. The cabbage stem weevil, Ceutorhynchus pallidactylus (Mrsh.) (Col.: Curculionidae), is one of the most damaging pests in Northern and Central Europe that requires regular control measures. Host plant resistance is a key factor in integrated pest management systems. To evaluate a large number of genotypes for their susceptibility to infestation by C. pallidactylus, new screening techniques were developed for testing both, the amount of feeding and the number of eggs deposited by adult C. pallidactylus on accessions of Brassicaceae under controlled conditions. In no-choice screening tests, the leaf area consumed by adult cabbage stem weevil was quantified on a wide spectrum of 107 brassicaceous genotypes (B. napus, Brassica rapa L. and Brassica oleracea L. cultivars, breeding lines, resynthesized rapeseed lines and wild Brassicaceae). In comparison to feeding on the standard cultivar 'Express', the average leaf area consumed by C. pallidactylus on nine oilseed rape cultivars, four resynthesized rapeseed lines and five other accessions (B. oleracea, Camelina alyssum (Mill.) and Lunaria annua L.) was significantly reduced by 44-90%. In dual-choice screening tests for the evaluation of oviposition preferences on 42 genotypes, female C. pallidactylus laid significantly fewer eggs into plants of two oilseed rape cultivars, five resynthesized rapeseeds and three accessions of B. oleracea and Brassica fruticulosa Cyrillo, respectively, than into plants of the standard cv 'Express'. Results of both laboratory screening tests were confirmed by results of additional field testing.10aCeutorhynchus pallidactylus1 aEickermann, M.1 aUlber, B.  uhttps://weevil.myspecies.info/screening-oilseed-rape-and-other-brassicaceous-genotypes-susceptibility-ceutorhynchus-pallidactylus02066nas a2200169   4500008004500000020001400045245012900059210006900188260001100257300001200268490000800280520141100288653002401699100002401723700001501747856013401762       2008                        Engldsh    a0931-204800aOptimization of coffee berry borer, Hypothenemus hampei Ferrari (Col., Scolytidae), mass trapping with an attractant mixture0 aOptimization of coffee berry borer Hypothenemus hampei Ferrari C  cAugust  a591-6000 v1323 aMass trapping is a technique currently being considered to control the coffee berry borer (CBB), Hypothenemus hampei Ferrari (Col., Scolytidae), as part of the integrated management of its populations. However, the research undertaken in this field has variable and sometimes contradictory results. The purpose of this study carried out with a single type of trap (experimental model '1B') was to evaluate the technique and define parameters for its efficient use. The first result obtained was detection of the excellent attractant properties of the ethanol[long dash]methanol mixture, and its efficiency related to the proportion of the two alcohols. Coffee borers were not attracted to traps with caffeine, green coffee powder, freshly pulped and hulled coffee berries and ground CBB. It was shown that the ethanol[long dash]methanol mixture (1 : 1) release rate varied without affecting the capture rate, and that the red colour of the trap substantially increased CBB attraction. In terms of trap set-up, it was found that capture rates were three times better with a trap height at 1.2 m, than that for a position near ground level. In addition, the best density of traps for achieving efficient mass trapping was 22 units per hectare. These results show the importance of developing an attractant using pure compounds, and of improving the trap and the trapping technique in line with CBB behaviour.10aHypothenemus hampei1 aDufour, Bernard, P.1 aFrerot, B.  uhttps://weevil.myspecies.info/optimization-coffee-berry-borer-hypothenemus-hampei-ferrari-col-scolytidae-mass-trapping-attractant00951nas a2200169   4500008004100000020001400041245007000055210006800125260001000193300001200203490000800215520042300223653002000646100001600666700001500682856008400697       2007                        eng d  a0931-204800aA simple method for the detection of imaginal diapause in beetles0 asimple method for the detection of imaginal diapause in beetles  cApril  a221-2230 v1313 aInvestigations on Ips typographus and Leptinotarsa decemlineata revealed that the activity of mitochondrial enzymes in the flight muscles provides a reliable criterion for the discrimination of diapausing and non-diapausing adults. Enzyme activity is conveniently detected in situ with commercially available tetrazolium salts. Staining intensity is correlated with the flight ability and often also with reproduction.10aIps typographus1 aDolezal, P.1 aSehnal, F.  uhttps://weevil.myspecies.info/simple-method-detection-imaginal-diapause-beetles02443nas a2200169   4500008004100000020001400041245011000055210006900165260001000234300001200244490000800256520183500264653002002099100001602119700001502135856012302150       2007                        eng d  a0931-204800aEffects of photoperiod and temperature on the development and diapause of the bark beetle Ips typographus0 aEffects of photoperiod and temperature on the development and di  cApril  a165-1730 v1313 aDiapause was induced in a Central European population of Ips typographus grown at 20 [degree]C when the day length decreased below 16 h (50% diapause incidence occurred in the 14.7:9.3 h L:D (light: dark) regime). The nondiapausing adults fed on days 2-6 and 10-14 after the ecdysis and swarmed after the second feeding bout with chorionated eggs in the ovaries and sperm in the spermiducts. Neither gonads nor the flight muscles matured and no swarming occurred in the diapausing adults. The development from egg to adult took about 34 days in both 18:6 h (no diapause) and 12:12 h L: D (diapause) regimes, but it was extended by up to 30% without diapause induction when only larvae or pupae were exposed to L: D 12:12 h. Diapause was induced in insects reared at L: D 12:12 h through the last larval and the pupal instars and/or in the adult stage. Temperature 23 [degree]C prevented diapause induction at L:D 12:12 h but diapause occurred at L: D 14:10 h associated with 26:6 [degree]C thermoperiod. The effect of thermoperiods on the developmental rate requires further research. Exposure of the non-diapausing adults to 5 [degree]C for several days blocked feeding and evoked a diapause- like state, whereas diapausing adults fed and their gonads slowly developed at this temperature. Diapausing adults exposed in forest to low night temperatures and transferred in October to 20 [degree]C readily reproduced at 18:6, but not 12:12 h L: D photoperiods. After 2-months at 5 [degree]C and darkness, they became insensitive to the photoperiod, matured and most of them also swarmed at 20 [degree]C in the 12:12 h L:D regime. In a Scandinavian population, diapause occurred at 18:6 h L:D and was terminated either by exposure to 5 [degree]C or by very long photoperiod (L: D 20:4 h) combined with high temperature (23 [degree]C)10aIps typographus1 aDolezal, P.1 aSehnal, F.  uhttps://weevil.myspecies.info/effects-photoperiod-and-temperature-development-and-diapause-bark-beetle-ips-typographus01389nas a2200181   4500008004100000020001400041245015100055210006900206260001100275300001200286490000800298520068700306653003000993100001701023700001801040700001501058856013401073       2009                        eng d  a0931-204800aAre the palms Washingtonia filifera and Chamaerops humilis suitable hosts for the red palm weevil, Rhynchophorus ferrugineus (Col. Curculionidae)?0 aAre the palms Washingtonia filifera and Chamaerops humilis suita  cAugust  a565-5670 v1333 aThe red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera, Curculionidae), is a widely distributed pest which has recently become the major pest of palms in the Mediterranean Basin. This weevil has been recorded on 19 different palm species, however, the host status of Washingtonia filifera and Chamaerops humilis remains unclear. The present study was carried out to check whether these species had either antixenotic or antibiotic mechanisms of resistance against this pest. Our results show that both W. filifera and C. humilis are resistant to R. ferrugineus. Resistance in W. filifera is based on antibiosis whereas in C. humilis resistance is based on antixenosis.10aRhynchophorus ferrugineus1 aDembilio, O.1 aJacas, J., A.1 aLlacer, E.  uhttps://weevil.myspecies.info/are-palms-washingtonia-filifera-and-chamaerops-humilis-suitable-hosts-red-palm-weevil-rhynchophorus02603nas a2200193   4500008004100000020001400041245012500055210006900180260000800249300001200257490000800269520189400277653002302171100001902194700001602213700002302229700002202252856013502274       2011                        eng d  a0931-204800aBidirectional selection for body mass and correlated response of pyrethroid resistance and fitness in Sitophilus zeamais0 aBidirectional selection for body mass and correlated response of  cMay  a285-2920 v1353 aResponses to artificial selection on body mass in the maize weevil Sitophilus zeamais (Coleoptera: Curculionidae) were investigated to determine whether changes in body mass are associated with insecticide susceptibility, rate of population growth, and metabolic rate. Two strains of the maize weevil differing in susceptibility to pyrethroid insecticides were subjected to bidirectional selection on body mass. The susceptible strain responded to selection resulting in individuals with lower or higher body mass, but the resistant strain responded significantly only to selection for lower body mass. The resistant strain selected for low body mass increased its level of deltamethrin resistance in 44 x . In contrast, selection for low body mass in the susceptible parental strain led to increased deltamethrin susceptibility (50 x ) and selection for high body mass increased deltamethrin resistance (4 x ). Thus, the correlated response of insecticide resistance to selection for body mass differed between strains, a likely consequence of their distinct genetic background. Regardless, body mass was positively correlated with fitness (reproductive output) (r = 0.79; P < 0.001), while such correlation with respiration rate was significant only at P = 0.07 (r = 0.44). Therefore, the association between body mass and deltamethrin resistance is population-dependent in the maize weevil, and the confluence of deltamethrin resistance and high body mass in a given strain will likely favour its energy metabolism and lead to the mitigation of fitness costs usually associated with insecticide resistance. The genetic background and selection history of insecticide resistant populations should not be neglected since they may favour the confluence of insecticide resistance with mitigation mechanisms of its associated fitness costs limiting the tactics available to their management.10aSitophilus zeamais1 aCorrea, A., S.1 aTolledo, J.1 aPereira, E., J. G.1 aGuedes, R., N. C.  uhttps://weevil.myspecies.info/bidirectional-selection-body-mass-and-correlated-response-pyrethroid-resistance-and-fitness-sitophil01682nas a2200181   4500008004100000020001400041245010300055210006900158260000800227300001200235490000800247520106800255100001201323700001801335700001301353700001101366856012301377       2011                        eng d  a0931-204800aMitochondrial COI gene transfers to the nuclear genome of Dendroctonus valens and its implications0 aMitochondrial COI gene transfers to the nuclear genome of Dendro  cMay  a302-3100 v1353 aMitochondrial gene transfer to the nuclear genome could affect the accuracy of results in population genetics and evolutionary studies using mitochondrial gene markers. In a population genetics study of the red turpentine beetle (Dendroctonus valens), an invasive species in China, we found numerous ambiguous sites existing in the Cytochrome Oxidase I (COI) gene sequences obtained directly from polymerase chain reaction (PCR) products amplified from total genomic DNA using universal primers. By comparing the profiles of restriction endonuclease digestions and the sequences of PCR products amplified from mitochondrial DNA and nuclear DNA of the same individuals, we confirmed it was a phenomenon of mitochondrial gene transfer to the nuclear genome. Large numbers of COI pseudogenes were detected in this species. According to different levels of condon position bias and phylogenetic analysis, these should have originated from independent integration events. The impact of nuclear mitochondrial DNA sequences on population genetics analyses was discussed.1 aCai, Y.1 aCheng, X., Y.1 aDuan, D.1 aXu, R.  uhttps://weevil.myspecies.info/mitochondrial-coi-gene-transfers-nuclear-genome-dendroctonus-valens-and-its-implications01901nas a2200169   4500008004500000020001400045245013400059210006900193260001300262300001000275490000800285520123900293653002701532100001801559700001901577856013501596       2008                        Engldsh    a0931-204800aAggregation pheromone in Sternechus subsignatus (Coleoptera: Curculionidae): olfactory behaviour and temporal pattern of emission0 aAggregation pheromone in Sternechus subsignatus Coleoptera Curcu  cFebruary  a54-580 v1323 aThe Brazilian soybean stalk weevil, Sternechus subsignatus Boehman (Coleoptera: Curculionidae), is a pest of economic importance in many regions of Brazil. Volatiles from both sexes of S. subsignatus were collected by aeration and the behavioural response of males and females was evaluated using a Y-olfactometer. The results obtained demonstrate that the communication in S. subsignatus is mediated by aggregation pheromone as both sexes were attracted to host plant (HP) volatiles, and this attraction was increased by the addition of male volatiles. At least five male-specific compounds (1-5) were detected in the chromatographic analysis, providing chemical support to the behavioural data. Release of these volatiles is dependent on the presence of the HP as the amount of compounds differs significantly when volatiles are collected from weevils with or without access to food. The release takes place mainly during photophase, showing a peak between 4 and 6 h after its beginning, which is also a peak of the insect activity in the field. Studies are underway to elucidate the structures of these putative aggregation pheromone components, in order to evaluate their biological activity under laboratory and field conditions.10aSternechus subsignatus1 aAmbrogi, B.G.1 aZarbin, P.H.G.  uhttps://weevil.myspecies.info/aggregation-pheromone-sternechus-subsignatus-coleoptera-curculionidae-olfactory-behaviour-and-tempor01951nas a2200181   4500008004100000020001400041245013100055210006900186260001000255300001200265490000800277520126900285100001601554700001701570700002901587700001801616856013501634       2007                        eng d  a0931-204800aElectrophysiological and behavioural responses of Scyphophorus acupunctatus (Col., Curculionidae) to Agave tequilana volatiles0 aElectrophysiological and behavioural responses of Scyphophorus a  cMarch  a121-1270 v1313 aThe weevil Scyphophorus acupunctatus Gyllenhal (Col., Curculionidae) is the most important insect pest of cultivated agaves in Mexico. The objective of this study was to search for potential attractants for this weevil species from the freshly cut fleshy leaves of healthy Agave tequilana Weber var. Blue plants. Combined gas chromatography-electroantennography (GC-EAD) analysis of A. tequilana volatile extracts showed that seven peaks elicited antennal responses from males and females. Five of these peaks were identified by gas chromatography-mass spectrometry (GC-MS) as [omicron]-xylene, [alpha]-pinene, 3-carene, [gamma]-terpinene and linalool. Electroantennogram (EAG) records of both sexes to 1-, 10- and 100-[mu]g-stimulus load of these five compounds showed that there was a dose effect on the EAG responses for linalool, 3-carene and [alpha]-pinene, but not for [gamma]-terpinene and [omicron]-xylene. There were no sexual differences between male and female EAG responses to any of the compounds tested. Y-tube olfactometer bioassays of the compounds showed that males and females were attracted to [alpha]-pinene, 3-carene, [gamma]-terpinene and/or linalool at doses of 1 and 10 [mu]g, while weevils were repelled by linalool at a dose of 100 [mu]g.1 aAltuzar, A.1 aMalo, E., A.1 aGonzález-Hernández, H.1 aRojas, J., C.  uhttps://weevil.myspecies.info/electrophysiological-and-behavioural-responses-scyphophorus-acupunctatus-col-curculionidae-agave-teq01593nas a2200157   4500008004100000020001400041245018100055210006900236260000800305300001200313490000800325520092700333100002101260700001901281856013501300       2010                        eng d  a0931-204800aSex ratio and the role of mild relative humidity in mating behaviour of red date palm weevil Rhynchophorus ferrugineus Oliv. (Coleoptera: Curculionidae) gamma-irradiated adults0 aSex ratio and the role of mild relative humidity in mating behav  cMar  a157-1620 v1343 aThe influence of gamma radiation on the mating behaviour of the red date palm weevil (RDPW), Rhynchophorus ferrugineus (Olivier), and the efficacy of sterile insect technique (SIT) under different levels of relative humidity (RH) were studied. No adverse effects of gamma radiation were observed on the mating behaviour parameters of the RDPW, such as mate recognition time, mating duration, mating frequency within a 30-min period and duration between consecutive matings. However, the weevils were sexually stimulated during aggregation. RH significantly affected egg laying as well as egg hatching. Significantly lower egg laying and hatching were recorded at 25% RH than at higher humidity levels, suggesting that low humidity conditions are better for successful SIT manipulations in the field. Lifespan of irradiated RDPW males was significantly shorter than that of un-irradiated controls, irrespective of RH level.1 aAl-Ayedh, H., Y.1 aRasool, K., G.  uhttps://weevil.myspecies.info/sex-ratio-and-role-mild-relative-humidity-mating-behaviour-red-date-palm-weevil-rhynchophorus-ferrug02131nas a2200169   4500008004100000020001400041245013400055210006900189260000800258300001200266490000800278520146700286653002901753100001901782700002501801856013501826       2010                        eng d  a0931-204800aSpatial distribution of colonizing Listronotus maculicollis populations: implications for targeted management and host preference0 aSpatial distribution of colonizing Listronotus maculicollis popu  cMay  a275-2840 v1343 aWe characterized the spatio-temporal distribution of emerging overwintered adult Listronotus maculicollis populations colonizing golf course fairways with Spatial Analyses by Distance IndicEs (SADIE) with the goal to better target management tactics and to test assumptions for weevil preference for annual bluegrass (Poa annua). Adults randomly colonized and moved throughout fairways. However, cumulative captures were significantly aggregated along fairway edges closest to overwintering sites demonstrating progressive movement through the edges. Spatial association analyses suggest that the spatial patterns of cumulative captures of adults rather than weekly patterns were strongly associated with larvae, indicating that the adults enter fairways from the edges and deposit eggs over the course of several weeks. We did not observe an effect of host species on the distribution of either adult or larval L. maculicollis which leads us to question traditional assumptions of host preference for short mown P. annua. Instead, we propose that the aggregated distribution of larvae is generated by a low encounter rate of short mown hosts, rather than preference for species or cultivar. This study indicates that caution need to be applied when using preference-performance criteria in host preference studies. Future behavioural studies need to address the contributions of encounter rate and host species on L. maculicollis host selection and oviposition.10aListronotus maculicollis1 aMcGraw, B., A.1 aKoppenhoefer, A., M.  uhttps://weevil.myspecies.info/spatial-distribution-colonizing-listronotus-maculicollis-populations-implications-targeted-managemen00562nas a2200145   4500008004100000245010800041210006900149300001200218490000800230100001500238700001600253700001300269700001300282856012100295       1999                        eng d00aA new character for sex differentiation of adults of Anthonomus pomorum L. (Coleoptera, Curculionidae).0 anew character for sex differentiation of adults of Anthonomus po  a319-3200 v1231 aDuan, J.J.1 aWeber, D.C.1 aHirs, B.1 aDorn, S.  uhttps://weevil.myspecies.info/new-character-sex-differentiation-adults-anthonomus-pomorum-l-coleoptera-curculionidae01914nas a2200289   4500008004500000020001400045245012400059210006900183260001000252300001000262490000800272520107300280653001401353653002101367653002601388653001001414653001501424653002001439653002601459653001301485653001501498100002101513700001701534700001401551700001801565856004101583       2005                        Engldsh    a0931-204800aDevelopment of a semiochemical-based trapping method for the New Guinea sugarcane weevil, Rhabdoscelus obscurus in Guam0 aDevelopment of a semiochemicalbased trapping method for the New   cMarch  a65-690 v1293 aAggregation pheromone of the Australian population of New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval), in conjunction with other semiochemicals, was used to develop an efficient trapping method for the weevil population in Guam. In a field experiment at Yigo, plastic bucket traps baited with the lure of the Australian R. obscurus population in combination with ethyl acetate and cut sugarcane captured significantly more weevils than traps baited with pheromone + ethyl acetate, pheromone + sugarcane or individual lure components alone. Traps baited with various semiochemical-based lures and treated with insecticide captured significantly greater numbers of weevils than those not treated with insecticide. Traps baited with cut sugarcane caught significantly more weevils than those without sugarcane. Semiochemical-based trapping in weevil management has potential either in mass trapping or as part of an integrated pest management (IPM) programme. Based on the present findings, a future line of work for the control of this weevil is proposed.10aBehaviour10aChemical signals10aCollecting techniques10aHosts10aLand zones10aOceanic islands10aPacific Ocean islands10aparasite10aTechniques1 aREDDY, G., V. P.1 aCruz, Z., T.1 aBAMBA, J.1 aMUNIAPPAN, R.  u<Go to ISI>://ZOOREC:ZOOR14107040851