00393nas a2200109 4500008004100000245006100041210005700102300001200159490000700171100002100178856008400199 1945 eng d00aNew injurious Curculionidae (Col.) from Tropical Africa.0 aNew injurious Curculionidae Col from Tropical Africa a177-1800 v361 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-tropical-africa-000364nas a2200109 4500008004100000245005200041210004800093300001000141490000700151100002100158856007500179 1944 eng d00aNew injurious Curculionidae from Africa (Col.).0 aNew injurious Curculionidae from Africa Col a43-480 v351 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-africa-col-000316nas a2200109 4500008004100000245003300041210003200074300000800106490000700114100002100121856006400142 1938 eng d00aNew injurious Curculionidae.0 aNew injurious Curculionidae a1-80 v291 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-000342nas a2200109 4500008004100000245004000041210003600081300001900117490000700136100002100143856006800164 1937 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a467-477+pl.XII0 v281 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-400335nas a2200109 4500008004100000245004000041210003600081300001200117490000700129100002100136856006800157 1928 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a257-2660 v181 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-300342nas a2200109 4500008004100000245004000041210003600081300001900117490000700136100002100143856006800164 1927 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a199-218+pl.XIX0 v171 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-200362nas a2200109 4500008004100000245004800041210004700089300001200136490000700148100002100155856007600176 1925 eng d00aNew Curculionidae attacking trees in India.0 aNew Curculionidae attacking trees in India a339-3440 v151 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-curculionidae-attacking-trees-india-000387nas a2200109 4500008004100000245005800041210005400099300001000153490000700163100002100170856008600191 1925 eng d00aNew Curculionidae attacking cultivated plants (Col.).0 aNew Curculionidae attacking cultivated plants Col a67-750 v161 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-curculionidae-attacking-cultivated-plants-col-000391nas a2200109 4500008004100000245005600041210005300097300001800150490000700168100002100175856008500196 1922 eng d00aSome injurious neotropical weevils (Curculionidae).0 aSome injurious neotropical weevils Curculionidae a59-71+pl.I-II0 v131 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-injurious-neotropical-weevils-curculionidae-000324nas a2200109 4500008004100000245003200041210003100073300001900104490000700123100002100130856006300151 1920 eng d00aSome new injurious weevils.0 aSome new injurious weevils a271-278+pl.VII0 v111 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-new-injurious-weevils-000347nas a2200109 4500008004100000245004400041210004300085300001200128490000600140100002100146856007000167 1914 eng d00aFour new injurious weevils from Africa.0 aFour new injurious weevils from Africa a235-2390 v51 aMarshall, G.A.K. uhttps://weevil.myspecies.info/four-new-injurious-weevils-africa-000380nas a2200109 4500008004100000245005600041210005100097300001200148490000600160100002100166856008300187 1916 eng d00aSome injurious Indian weevils (Curculionidae) - II.0 aSome injurious Indian weevils Curculionidae II a365-3730 v61 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-injurious-indian-weevils-curculionidae-ii-002169nas a2200229 4500008004100000020001400041245011400055210006900169260001300238300001200251490000700263520139600270653002601666100001501692700001501707700002501722700001901747700001601766700001501782700001801797856012401815 2007 eng d a0007-485300aPopulation structure of the banana weevil, an introduced pest in the Canary Islands, studied by RAPD analysis0 aPopulation structure of the banana weevil an introduced pest in  cDecember a585-5900 v973 aThe banana weevil (BW), Cosmopolites sordidus (Coleoptera: Curculionidae), is one of the most important insect pests of bananas and plantains. The mobility and the origin of BW infestations at the Canary Islands (Tenerife, La Gomera and La Palma) have been analysed using Random Amplified Polymorphic DNA (RAPD) as molecular markers. Populations from Costa Rica, Colombia, Uganda and Madeira were also included for comparison. One hundred and fifteen reproducible bands from eight primers were obtained. The level of polymorphism in the populations from the Canary Islands (40-62%) was in the range of those found in other populations. Nei's genetic distances, pair-wise fixation index (FST) values indicate that the closest populations are Tenerife populations among themselves (Nei's genetic distance=0.054-0.100; FST=0.091-0.157) and Costa Rica and Colombia populations (Nei's genetic distance=0.049; FST=0.113). Our results indicate the existence of BW local biotypes with limited gene flow and affected by genetic drift. These results are compatible with a unique event of colonization at Tenerife; whereas, the outbreaks in La Gomera and La Palma may come from independent introductions. The Madeira population is phylogenetically and geographically closer to the Canary Islands populations, suggesting that it is the most likely source of the insects introduced in the Canary Islands.10aCosmopolites sordidus1 aMagana, C.1 aBeroiz, B.1 aHernandez-Crespo, P.1 ade Oca, Montes1 aCarnego, A.1 aOrtego, F.1 aCastanera, P. uhttps://weevil.myspecies.info/population-structure-banana-weevil-introduced-pest-canary-islands-studied-rapd-analysis-000362nas a2200109 4500008004100000245005200041210004800093300001000141490000700151100002100158856007300179 1944 eng d00aNew injurious Curculionidae from Africa (Col.).0 aNew injurious Curculionidae from Africa Col a43-480 v351 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-africa-col00391nas a2200109 4500008004100000245006100041210005700102300001200159490000700171100002100178856008200199 1945 eng d00aNew injurious Curculionidae (Col.) from Tropical Africa.0 aNew injurious Curculionidae Col from Tropical Africa a177-1800 v361 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-tropical-africa00314nas a2200109 4500008004100000245003300041210003200074300000800106490000700114100002100121856006200142 1938 eng d00aNew injurious Curculionidae.0 aNew injurious Curculionidae a1-80 v291 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae00342nas a2200109 4500008004100000245004000041210003600081300001900117490000700136100002100143856006800164 1937 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a467-477+pl.XII0 v281 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-100335nas a2200109 4500008004100000245004000041210003600081300001200117490000700129100002100136856006800157 1928 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a257-2660 v181 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col-000340nas a2200109 4500008004100000245004000041210003600081300001900117490000700136100002100143856006600164 1927 eng d00aNew injurious Curculionidae (Col.).0 aNew injurious Curculionidae Col a199-218+pl.XIX0 v171 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-injurious-curculionidae-col00389nas a2200109 4500008004100000245005600041210005300097300001800150490000700168100002100175856008300196 1922 eng d00aSome injurious neotropical weevils (Curculionidae).0 aSome injurious neotropical weevils Curculionidae a59-71+pl.I-II0 v131 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-injurious-neotropical-weevils-curculionidae00360nas a2200109 4500008004100000245004800041210004700089300001200136490000700148100002100155856007400176 1925 eng d00aNew Curculionidae attacking trees in India.0 aNew Curculionidae attacking trees in India a339-3440 v151 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-curculionidae-attacking-trees-india00385nas a2200109 4500008004100000245005800041210005400099300001000153490000700163100002100170856008400191 1925 eng d00aNew Curculionidae attacking cultivated plants (Col.).0 aNew Curculionidae attacking cultivated plants Col a67-750 v161 aMarshall, G.A.K. uhttps://weevil.myspecies.info/new-curculionidae-attacking-cultivated-plants-col00322nas a2200109 4500008004100000245003200041210003100073300001900104490000700123100002100130856006100151 1920 eng d00aSome new injurious weevils.0 aSome new injurious weevils a271-278+pl.VII0 v111 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-new-injurious-weevils00345nas a2200109 4500008004100000245004400041210004300085300001200128490000600140100002100146856006800167 1914 eng d00aFour new injurious weevils from Africa.0 aFour new injurious weevils from Africa a235-2390 v51 aMarshall, G.A.K. uhttps://weevil.myspecies.info/four-new-injurious-weevils-africa00378nas a2200109 4500008004100000245005600041210005100097300001200148490000600160100002100166856008100187 1916 eng d00aSome injurious Indian weevils (Curculionidae) - II.0 aSome injurious Indian weevils Curculionidae II a365-3730 v61 aMarshall, G.A.K. uhttps://weevil.myspecies.info/some-injurious-indian-weevils-curculionidae-ii02167nas a2200229 4500008004100000020001400041245011400055210006900169260001300238300001200251490000700263520139600270653002601666100001501692700001501707700002501722700001901747700001601766700001501782700001801797856012201815 2007 eng d a0007-485300aPopulation structure of the banana weevil, an introduced pest in the Canary Islands, studied by RAPD analysis0 aPopulation structure of the banana weevil an introduced pest in  cDecember a585-5900 v973 aThe banana weevil (BW), Cosmopolites sordidus (Coleoptera: Curculionidae), is one of the most important insect pests of bananas and plantains. The mobility and the origin of BW infestations at the Canary Islands (Tenerife, La Gomera and La Palma) have been analysed using Random Amplified Polymorphic DNA (RAPD) as molecular markers. Populations from Costa Rica, Colombia, Uganda and Madeira were also included for comparison. One hundred and fifteen reproducible bands from eight primers were obtained. The level of polymorphism in the populations from the Canary Islands (40-62%) was in the range of those found in other populations. Nei's genetic distances, pair-wise fixation index (FST) values indicate that the closest populations are Tenerife populations among themselves (Nei's genetic distance=0.054-0.100; FST=0.091-0.157) and Costa Rica and Colombia populations (Nei's genetic distance=0.049; FST=0.113). Our results indicate the existence of BW local biotypes with limited gene flow and affected by genetic drift. These results are compatible with a unique event of colonization at Tenerife; whereas, the outbreaks in La Gomera and La Palma may come from independent introductions. The Madeira population is phylogenetically and geographically closer to the Canary Islands populations, suggesting that it is the most likely source of the insects introduced in the Canary Islands.10aCosmopolites sordidus1 aMagana, C.1 aBeroiz, B.1 aHernandez-Crespo, P.1 ade Oca, Montes1 aCarnego, A.1 aOrtego, F.1 aCastanera, P. uhttps://weevil.myspecies.info/population-structure-banana-weevil-introduced-pest-canary-islands-studied-rapd-analysis02238nas a2200181 4500008004100000020001400041245012900055210006900184260001000253300001200263490000800275520157800283100001701861700001201878700001401890700001701904856013501921 2010 eng d a0007-485300aSuperinfection of five Wolbachia in the alnus ambrosia beetle, Xylosandrus germanus (Blandford) (Coleoptera: Curuculionidae)0 aSuperinfection of five Wolbachia in the alnus ambrosia beetle Xy cApril a231-2390 v1003 aWolbachia bacteria are among the most common endosymbionts in insects. In Wolbachia research, the Wolbachia surface protein (wsp) gene has been used as a phylogenetic tool, but relationships inferred by single-locus analysis can be unreliable because of the extensive genome recombination among Wolbachia strains. Therefore, a multilocus sequence typing (MLST) method for Wolbachia, which relies upon a set of five conserved genes, is recommended. In this study, we examined whether the alnus ambrosia beetle, Xylosandrus germanus (Bland ford), is infected with Wolbachia using wsp and MLST genes. Wolbachia was detected from all tested specimens of X. gem: anus (n=120) by wsp amplification. Five distinct sequences (i.e. five alleles) for wsp were found, and labeled as wXge1-5. MLST analysis and molecular phylogeny of concatenated sequences of MLST genes identified wXge3 and wXge5 as closely-related strains. The detection rate of wXge4 and wXge1 was 100% and 63.3%, respectively; wXge2, wXge3 and wXge5 were detected from less than 15% of specimens. We performed mitochondrial haplotype analyses that identified three genetic types of X. germanus, i.e. Clades A, B and C. Wsp alleles wXge1, wXge2 and wXge4 were detected in all clade A beetles; wXge2 allele was absent from Clades B and C. We concluded that (i) five wsp alleles were found from X. germanus, (ii) use of MLST genes, rather than the wsp gene, are more suited to construct Wolbachia phylogenies and (iii) wsp alleles wXge2 and wXge3/wXge5 would infect clade A and clade B/C of X. germanus, respectively.1 aKawasaki, Y.1 aIto, M.1 aMiura, K.1 aKajimura, H. uhttps://weevil.myspecies.info/superinfection-five-wolbachia-alnus-ambrosia-beetle-xylosandrus-germanus-blandford-coleoptera-curucu01723nas a2200133 4500008004100000245020500041210006900246300001200315490000700327520108500334100001901419700001601438856013501454 1992 eng d00aOviposition patterns and the supplementary role of a seed-feeding weevil, Rhyssomatus marginatus (Coleoptera: Curculionidae), in the biological control of a perennial leguminous weed, Sesbania punicea0 aOviposition patterns and the supplementary role of a seedfeeding a343-3470 v823 aA seed-feeding curculionid, Rhyssomatus marginatus Fåhraeus, was introduced into South Africa for biological control of a perennial leguminous weed, Sesbania punicea, from South America. R. marginatus has become established even though its larval food source, seeds in ripening pods, is severely depleted by another biological control agent, an apionid, Trichapion lativentre (Beguin Billecocq), which destroys nearly all the flower-buds produced by the plants and reduces seed-set by 98% on average. In spite of this indirect competition, R. marginatus destroys up to 88% of the remaining seeds that develop on S. punicea, regardless of host plant location. Detrimental intraspecific interactions between larvae of R. marginatus are minimized, and the utilization of a depleted food source is optimized, through meticulous selection of oviposition sites by the female weevils. Although numerically inferior, R. marginatus is an important supplementary agent to T. lativentre and together the two species of weevils have almost arrested the reproductive potential of S. punicea.1 aHoffmann, J.H.1 aMoran, V.C. uhttps://weevil.myspecies.info/oviposition-patterns-and-supplementary-role-seed-feeding-weevil-rhyssomatus-marginatus-coleoptera-cu01548nas a2200169 4500008004100000020001400041245019900055210006900254260001000323300001200333490000700345520083100352653002201183653001701205100002101222856013501243 2007 eng d a0007-485300aA taxonomic revision, biology and morphology of immature stages of the Entedon sparetus species group (Hymenoptera: Eulophidae), egg-larval endoparasitoids of weevils (Coleoptera: Curculionidae)0 ataxonomic revision biology and morphology of immature stages of  cApril a139-1660 v973 aThe sparetus-group of Entedon is revised. Six species are recognized for the group, including one new species, E. lucasi Gumovsky sp. n., which is described from Algeria. All species are either diagnosed or described, and illustrated, and new distribution records are provided. An illustrated dichotomous key to all species of the group is given. Biology of two species, E. thomsonianus Erdos and E. sparetus Walker, is studied in detail: both species proved to be egg-larval parasitoids of stem-boring weevils, Lixus cardui Olivier on the scotch thistle Onopordum acanthium and Gymnetron asellus (Gravenhorst) on mullein Verbascum sp., respectively. The morphology of larval stages and peculiarities of parasitoid-host relationships are described. Possible benefits of egg-larval parasitism for Entedon species are discussed.10aGymnetron asellus10aLixus cardui1 aGumovsky, A., V. uhttps://weevil.myspecies.info/taxonomic-revision-biology-and-morphology-immature-stages-entedon-sparetus-species-group-hymenoptera02578nas a2200193 4500008004100000020001400041245013700055210006900192260001100261300001200272490000700284520185200291653002302143100002202166700002202188700002102210700001802231856013502249 2009 eng d a0007-485300aFlight take-off and walking behavior of insecticide-susceptible and -resistant strains of Sitophilus zeamais exposed to deltamethrin0 aFlight takeoff and walking behavior of insecticidesusceptible an cAugust a393-4000 v993 aInsects have evolved a variety of physiological and behavioral responses to various toxins in natural and managed ecosystems. However, insect behavior is seldom considered in insecticide studies although insects are capable of changing their behavior in response to their sensory perception of insecticides, which may compromise insecticide efficacy. This is particularly serious for insect pests that are physiologically resistant to insecticides since insecticide avoidance may further compromise their management. Locomotion plays a major role determining insecticide exposure and was, therefore, considered in investigating the behavioral responses of male and female adult insects from an insecticide-susceptible and two insecticide-resistant strains of the maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), a major pest of stored cereals. Different dose-dependent behavioral responses were expected among strains with behavioral resistance less likely to occur in physiologically resistant insects since they are able to withstand higher doses of insecticide. The behavioral responses to deltamethrin-sprayed surfaces differed among the maize weevil strains. Such responses were concentration-independent for all of the strains. Stimulus-independent behavioral resistance was unrelated to physiological resistance with one resistant strain exhibiting higher rates of flight take-off and the other resistant strain exhibiting lower flight take-off. Female mobility was similar for all strains, unlike male mobility. Males of each strain exhibited a pattern of mobility following the same trend of flight take-off. Behavioral patterns of response to insecticide are, therefore, variable among strains, particularly among insecticide-resistant strains, and worth considering in resistance surveys and management programs.10aSitophilus zeamais1 aGuedes, N., M. P.1 aGuedes, R., N. C.1 aFerreira, G., H.1 aSilva, L., B. uhttps://weevil.myspecies.info/flight-take-and-walking-behavior-insecticide-susceptible-and-resistant-strains-sitophilus-zeamais-ex03129nas a2200193 4500008004100000020001400041245014200055210006900197260000800266300001200274490000800286520240600294653002802700100001802728700001902746700001702765700001802782856013502800 2011 eng d a0007-485300aArgentine stem weevil (Listronotus bonariensis, Coleoptera: Curculionidae) population dynamics in Canterbury, New Zealand dryland pasture0 aArgentine stem weevil Listronotus bonariensis Coleoptera Curculi cJun a295-3030 v1013 aThe Argentine stem weevil (Listronotus bonariensis) was an economically important pest in New Zealand pastures until the release of the parasitoid Microctonus hyperodae. This contribution uses historical data to investigate the regulation of the pest populations prior to, and somewhat during, the establishment of this parasitoid in dryland Canterbury, New Zealand. Thus, a significant goal of this study is to provide an L. bonariensis population dynamics baseline for any future work that aims to analyse the full effects of M. hyperodae on the weevil, now that equilibrium with the weevil host has been reached. The population dynamics of L. bonariensis, based on a life-table approach, were investigated using data collected regularly for eight years from populations in Canterbury, New Zealand. The key factor affecting end-of-season L. bonariensis density was found to be variation in second generation fourth instar prepupal and pupal mortality. This may have been caused by arrested development and ongoing mortality resulting from the onset of cooler autumnal conditions. A compensatory response was found in recruitment to the second summer weevil generation, whereby the realised fecundity of the emergent first summer generation of weevils was found to be negatively related to the density of adult weevils per ryegrass tiller. This is the first time that this has been found via long-term population analysis of L. bonariensis, although indications of this have been found elsewhere in caging, pot and small plot experiments. In this study, the effect of the parasitoid biocontrol agent Microctonus hyperodae on L. bonariensis population dynamics was unclear, as the analysis covered a period when the parasitoid Microctonus hyperodae was introduced and still establishing. It does, however, raise important questions for future analysis in terms of the interaction between parasitism and unrealised fecundity. The results in this contribution also highlighted regional differences. Overwintering mortality of adult weevils in Canterbury was constant between years, whilst earlier studies in the North Island Waikato region indicated this mortality was density dependent. In addition, the availability of tillers in endophyte-free ryegrass pastures in Canterbury had no influence on egg and early-instar larval survival, which contrasts with the finding from endophytic Waikato pastures.10aListronotus bonariensis1 aGoldson, S.L.1 aBarron, M., C.1 aKean, J., M.1 avan Koten, C. uhttps://weevil.myspecies.info/argentine-stem-weevil-listronotus-bonariensis-coleoptera-curculionidae-population-dynamics-canterbur01557nas a2200205 4500008004100000020001400041245009600055210006900151260000800220300001200228490000800240520087400248653001901122100001901141700001801160700001701178700002001195700002301215856011301238 2010 eng d a0007-485300aThe bionomics of an invasive species Sitona lepidus during its establishment in New Zealand0 abionomics of an invasive species Sitona lepidus during its estab cJun a339-3460 v1003 aThe egg, larval, pupal and adult abundance of the clover root weevil Sitona lepidus Gyllenhal (Coleoptera: Curculionidae) was monitored at three sites for the first ten years following the discovery of this exotic pest in the Waikato region of New Zealand. The species went through an initial boom and bust cycle at two sites, with populations reaching up to 1800 larvae m-2. Thereafter, winter larval populations were relatively stable, ranging between 450-750 m-2. Unlike in the Northern Hemisphere, S. lepidus was found to have two generations a year in the Waikato region of New Zealand. Pasture white clover content at the time of peak adult numbers was positively related to the subsequent peak larval populations for each generation. The factors contributing to the emergence of S. lepidus as one of the most important pasture pests in New Zealand are discussed.10aSitona lepidus1 aGerard, P., J.1 aGoldson, S.L.1 aHardwick, S.1 aAddison, P., J.1 aWilloughby, B., E. uhttps://weevil.myspecies.info/bionomics-invasive-species-sitona-lepidus-during-its-establishment-new-zealand02478nas a2200181 4500008004100000020001400041245020600055210006900261260001000330300001200340490000700352520172600359653002102085100001602106700002002122700001902142856013502161 2009 eng d a0007-485300aCompetition and intraguild predation between the braconid parasitoid Bracon hylobii and the entomopathogenic nematode Heterorhabditis downesi, natural enemies of the large pine weevil, Hylobius abietis0 aCompetition and intraguild predation between the braconid parasi cApril a151-1610 v993 aIn biological control programmes introduced natural enemies compete with indigenous enemies for hosts and may also engage in intraguild predation when two species competing for the same prey attack and consume one another. The large pine weevil, Hylobius abietis L. (Coleoptera: Curculionidae), is an important pest of coniferous reforestation in Europe. Among its natural enemies, the parasitoid Bracon hylobii Ratz. (Hymenoptera: Braconidae) and entomopathogenic nematodes have potential as biological control agents. Both parasitoid and nematodes target the weevil larvae and, hence, there is potential for competition or intraguild predation.In this study, we examine the interaction of B. hylobii with the nematode Heterorhabditis downesi Stock, Griffin and Burnell (Nematode: Heterorhabditidae), testing the susceptibility of larvae, pupae and adults of B. hylobii to H. downesi and whether female parasitoids discriminate between nematode-infected and uninfected weevils for oviposition. In choice tests, when weevils were exposed to nematodes 1-7 days previously, no B. hylobii oviposited on nematode-infected weevil larvae. Up to 24 h, healthy weevils were twice as likely as nematode-infected ones to be used for oviposition. Bracon hylobii females did not adjust clutch size; nematode-infected hosts were either rejected or the parasitoid laid a full clutch of eggs on them.When nematodes were applied to the parasitoid feeding on weevil larvae, the nematodes parasitized the parasitoid larvae, there was a reduction in cocoon formation and fewer cocoons eclosed. Eclosion rate was not reduced when nematodes were applied to fully formed cocoons, but nearly all of the emerging adults were killed by nematodes.10aHylobius abietis1 aEverard, A.1 aGriffin, C., T.1 aDillon, A., B. uhttps://weevil.myspecies.info/competition-and-intraguild-predation-between-braconid-parasitoid-bracon-hylobii-and-entomopathogenic01825nas a2200193 4500008004100000020001400041245017200055210006900227260001300296300001100309490000800320520106700328653003001395100001701425700001801442700001901460700001801479856013401497 2012 eng d a0007-485300aLower temperature thresholds for oviposition and egg hatching of the Red Palm Weevil, Rhynchophorus ferrugineus (Coleoptera: Curculionidae), in a Mediterranean climate0 aLower temperature thresholds for oviposition and egg hatching of cFebruary a97-1020 v1023 aThe red palm weevil, Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae), is an economically important pest of palms worldwide. To better understand the phenology of R. ferrugineus populations in the Mediterranean basin, the objective of the present work has been to estimate the effect of temperatures within the range 10[long dash]25[degree]C on the reproductive parameters of R. ferrugineus and to determine its lower temperature thresholds for oviposition and egg hatching. Our results confirm that oviposition in R. ferrugineus is strongly affected by temperature. Lower thresholds for oviposition and egg hatching (15.45[degree] and 13.95[degree]C, respectively) are below the mean monthly temperatures registered in winter in most of the northern shore of the Mediterranean basin. Under these circumstances, new palm infestations would be difficult during most of the winter. These results should be taken into account when planning some palm management practices, such as pruning or pesticide treatments, in areas under a Mediterranean climate.10aRhynchophorus ferrugineus1 aDembilio, O.1 aTapia, G., V.1 aTellez, M., M.1 aJacas, J., A. uhttps://weevil.myspecies.info/lower-temperature-thresholds-oviposition-and-egg-hatching-red-palm-weevil-rhynchophorus-ferrugineus02314nas a2200169 4500008004100000020001400041245017500055210006900230260000800299300001200307490000800319520161700327653003001944100001701974700001801991856013502009 2011 eng d a0007-485300aBasic bio-ecological parameters of the invasive Red Palm Weevil, Rhynchophorus ferrugineus (Coleoptera: Curculionidae), in Phoenix canariensis under Mediterranean climate0 aBasic bioecological parameters of the invasive Red Palm Weevil R cApr a153-1630 v1013 aThe invasive red palm weevil, Rhynchophorus ferrugineus Olivier (Coleoptera, Curculionidae), is one of the most destructive pests of palms in the world. Since its detection in the Mediterranean Basin, the ornamental Phoenix canariensis Hort. ex Chabaud has become its main host. This study was aimed at determining the life cycle of R. ferrugineus in live P. canariensis palms. Egg lethal temperature threshold and thermal constant were determined in the laboratory and resulted in 13.1[degree]C and 40.4 degree days (DD), respectively. A semi field assay was carried out in a mesh enclosure where living P. canariensis palms were artificially infested with neonate larvae at one-month intervals from June 2008 to May 2009 under natural conditions. Infested palms were dissected at different time intervals. Maximum mortality rates for R. ferrugineus were observed for palms infested either in December or January (100%), whereas those infested from April through September showed maximum survival rates. Mean monthly temperatures below 10.3[degree]C were lethal for neonate larvae, as 4.5[degree]C were for older immature stages. All recovered larvae could be classed according to one of 13 instars. A thermal constant of 666.5 DD was estimated for complete larval development. Pupal develoment required an additional 282.5 DD. Based on these results and on the temperatures from 46 climatic stations selected in the Iberian Peninsula, less than one generation per year can be expected in areas with mean annual temperature below 15[degree]C and more than two where mean annual temperature is above 19[degree]C.10aRhynchophorus ferrugineus1 aDembilio, O.1 aJacas, J., A. uhttps://weevil.myspecies.info/basic-bio-ecological-parameters-invasive-red-palm-weevil-rhynchophorus-ferrugineus-coleoptera-curcul02459nas a2200193 4500008004100000020001400041245016900055210006900224260001300293300001000306490000800316520171000324100001802034700002002052700002002072700001802092700002002110856013502130 2012 eng d a0007-485300aInvestigating preference-performance relationships in aboveground-belowground life cycles: a laboratory and field study with the vine weevil (Otiorhynchus sulcatus)0 aInvestigating preferenceperformance relationships in aboveground cFebruary a63-700 v1023 aThe preference-performance hypothesis has principally considered insect herbivores with aboveground lifecycles, although the hypothesis could be equally relevant to insects with life stages occurring both aboveground and belowground. Moreover, most studies have focussed on either laboratory or field experiments, with little attempt to relate the two. In this study, the preference-performance hypothesis was examined in an aboveground-belowground context in the laboratory using the vine weevil (Otiorhynchus sulcatus (F.)) (Coleoptera: Curculionidae) and two cultivars of red raspberry (Rubus idaeus), Glen Rosa and Glen Ample. A two-year field study (2008[long dash]2009) was also undertaken to characterise the population dynamics of adult weevils on the two raspberry cultivars. Larval performance (abundance and mass) differed significantly between Glen Rosa and Glen Ample, with Glen Rosa resulting in 26% larger but 56% fewer larvae compared to Glen Ample. Larval abundances were significantly and positively correlated with root nitrogen and magnesium concentrations, but negatively correlated with root iron. However, concentrations of these minerals were not significantly different in the two cultivars. Adult weevils did not preferentially select either of the two cultivars for egg laying (laying 3.08 and 2.80 eggs per day on Glen Ample and Glen Rosa, respectively), suggesting that there was no strong preference-performance relationship between adult vine weevils and their belowground offspring. Field populations of adult vine weevils were significantly higher on Glen Ample than Glen Rosa, which may reflect the higher larval survival on Glen Ample observed in laboratory experiments.1 aClark, K., E.1 aHartley, S., E.1 aBrennan, R., M.1 aMacKenzie, K.1 aJohnson, S., N. uhttps://weevil.myspecies.info/investigating-preference-performance-relationships-aboveground-belowground-life-cycles-laboratory-an02252nas a2200181 4500008004100000020001400041245010900055210006900164260001300233300001200246490000800258520159800266653002401864100002201888700001901910700001801929856012301947 2010 eng d a0007-485300aChemical cues from the coffee berry borer influence the locomotory behaviour of its bethylid parasitoids0 aChemical cues from the coffee berry borer influence the locomoto cDecember a707-7140 v1003 aCephalonomia stephanoderis and Prorops nasuta are two bethylid wasps released into several Latin American countries for classical biological control of coffee berry borer, Hypothenemus hampei, the most serious insect pest of coffee worldwide. Recent studies on the host location behaviour of these parasitoids have shown that females of both species are attracted to volatile compounds released by immature stages and dust and frass of H. hampei. In this study, we investigated the role of the contact chemicals present in dust and frass of H. hampei on the behaviour of P. nasuta and C. stephanoderis females. Parasitoids remained longer on patches treated with methanol extracts than on acetone and hexane extracts. Females spent more time on the patch treated with the methanol extract of dust and frass than on the patches treated with the methanol extract of dry coffee and methanol control. The concentration of the methanol extracts from dust and frass influenced the locomotory activity of parasitoids of both species. The time that females spent in the patch tended to increase as the concentration of the methanol extracts increased. A further experiment aimed to identify other behavioural descriptors and gain a deeper understanding of the mechanisms underlying the response of parasitoids to methanol extracts was performed. Females of both species spent more time, covered more distance, turned more (per unit time and per unit distance), and decreased their speed when they contacted patches treated with methanol extracts in comparison to patches treated with methanol control.10aHypothenemus hampei1 aChiu-Alvarado, P.1 aValle-Mora, J.1 aRojas, J., C. uhttps://weevil.myspecies.info/chemical-cues-coffee-berry-borer-influence-locomotory-behaviour-its-bethylid-parasitoids01949nas a2200193 4500008004100000020001400041245012000055210006900175260001300244300001000257490000800267520126600275653002501541100001301566700001101579700001501590700001701605856013301622 2011 eng d a0007-485300aFlight of the Chinese white pine beetle (Coleoptera: Scolytidae) in relation to sex, body weight and energy reserve0 aFlight of the Chinese white pine beetle Coleoptera Scolytidae in cFebruary a53-620 v1013 aThe flight distance, flight time and individual flight activities of males and females of Dendroctonus armandi were recorded during 96-h flight trials using a flight mill system. The body weight, glucose, glycogen and lipid content of four treatments (naturally emerged, starved, phloem-fed and water-fed) were compared among preflight, post-flight and unflown controls. There was no significant difference between males and females in total flight distance and flight time in a given 24-h period. The flight distance and flight time of females showed a significant linear decline as the tethered flying continued, but the sustained flight ability of females was better than that of males. The females had higher glycogen and lipid content than the males; however, there was no significant difference between both sexes in glucose content. Water-feeding and phloem-feeding had significant effects on longevity, survival days and flight potential of D. armandi, which resulted in longer feeding days, poorer flight potential and lower energy substrate content. Our results demonstrate that flight distances in general do not differ between water-fed and starved individuals, whereas phloem-fed females and males fly better than water-fed and starved individuals.10aDendroctonus armandi1 aChen, H.1 aLi, Z.1 aBu, S., H.1 aTian, Z., Q. uhttps://weevil.myspecies.info/flight-chinese-white-pine-beetle-coleoptera-scolytidae-relation-sex-body-weight-and-energy-reserve02362nas a2200169 4500008004100000020001400041245014300055210006900198260000800267300001200275490000800287520170000295100002101995700001802016700002302034856013502057 2010 eng d a0007-485300aAdult fecundity, host plant preferences, field activity and parasitism in the leaf weevil Phyllobius pyri (L.) (Coleoptera: Curculionidae)0 aAdult fecundity host plant preferences field activity and parasi cJun a303-3140 v1003 aAdults of the leaf weevil Phyllobius pyri (L.) (Coleoptera: Curculionidae) feed on a wide variety of broadleaved trees and occasionally cause severe defoliation in newly established farm woodlands. There is little information, however, on the relative susceptibility of different tree species to damage or on the habitat associations of adults and larvae of P. pyri, which might indicate the conditions that predispose trees to attack. Captures of adult P. pyri in emergence and flight traps in the current study indicated population densities in grassland of 0.5-6.4 adults per m2 at emergence but higher densities up to 13.5 per m2 in young pine plantations, where there was a mixture of grassy patches and young, naturally regenerating birch trees. The close proximity of larval food resources (grass roots) and a favoured adult host-plant, which also occurs in young farm woodlands, provided ideal conditions for P. pyri and allowed high population densities to develop. Feeding and performance experiments indicated that cherry, birch, oak and hornbeam were most susceptible to P. pyri, whereas field maple, hawthorn, rowan, lime and especially ash were resistant. Adult female P. pyri emerged in May reproductively immature and fed on tree foliage for 15.9[plus or minus]0.9 days before laying their first batch of eggs. Adults lived for 33.3[plus or minus]1.5 days, on average, and females laid a mean of 191.9[plus or minus]34.5 eggs (maximum = 589) during their lifetime. Eggs hatched after 16-20 days. During 2003 and 2004, 11-16% of adult P. pyri were parasitised by Pygostylus falcatus (Hymenoptera: Braconidae) and 19-29% were parasitised by Rondonia fasciata (Diptera: Tachinidae).1 aBilliald, H., E.1 aStraw, N., A.1 aStewart, A., J. A. uhttps://weevil.myspecies.info/adult-fecundity-host-plant-preferences-field-activity-and-parasitism-leaf-weevil-phyllobius-pyri-l-c02105nas a2200205 4500008004100000020001400041245016200055210006900217260001100286300001200297490000700309520133000316653002901646100001301675700001901688700002201707700001801729700001701747856013501764 2007 eng d a0007-485300aA review of the species of Mesopolobus (Chalcidoidea: Pteromalidae) associated with Ceutorhynchus (Coleoptera: Curculionidae) host-species of European origin0 areview of the species of Mesopolobus Chalcidoidea Pteromalidae a cAugust a387-3970 v973 aFour species of Mesopolobus Westwood were reared as parasitoids of Ceutorhynchinae hosts in Europe during surveys in 2000-2004. An illustrated key is given to differentiate the four species, M. gemellus Baur & Muller sp. n., M. incultus (Walker), M. morys (Walker) and M. trasullus (Walker), plus M. moryoides Gibson, a parasitoid of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham), in North America. Pteromalus clavicornis Walker is recognized as a junior synonym of M. incultus syn. n., and Pteromalus berecynthos Walker (also a junior synonym of M. incultus) is considered a correct original spelling. For Disema pallipes Forster (a junior synonym of Mesopolobus morys), a lectotype is designated. Mesopolobus morys is for the first time accurately associated with the seed weevil Ceutorhynchus turbatus (Schultze), a potential agent for classical biological control, of hoary cress, Lepidium draba L. (Brassicaceae), in North America. Mesopolobus gemellus is associated with another seed weevil, Ceutorhynchus typhae (= C.floralis) (Herbst), in pods of shepherd's purse, Capsella bursa-pastoris (L.) Medik. (Brassicaceae). Implications of the host-parasitoid associations are discussed relative to the introduction of species to North America for classical biological control of the cabbage seedpod weevil.10aCeutorhynchus obstrictus1 aBaur, H.1 aMuller, F., J.1 aGibson, G., A. P.1 aMason, P., G.1 aKuhlmann, U. uhttps://weevil.myspecies.info/review-species-mesopolobus-chalcidoidea-pteromalidae-associated-ceutorhynchus-coleoptera-curculionid02937nas a2200193 4500008004500000020001400045245014700059210006900206260001100275300001200286490000700298520219400305653002302499100001902522700002202541700002402563700002102587856013502608 2008 Engldsh  a0007-485300aEnhanced activity of carbohydrate- and lipid-metabolizing enzymes in insecticide-resistant populations of the maize weevil, Sitophilus zeamais0 aEnhanced activity of carbohydrate and lipidmetabolizing enzymes  cAugust a417-4240 v983 aInsecticide resistance is frequently associated with fitness disadvantages in the absence of insecticides. However, intense past selection with insecticides may allow the evolution of fitness modifier alleles that mitigate the cost of insecticide resistance and their consequent fitness disadvantages. Populations of Sitophilus zeamais with different levels of susceptibility to insecticides show differences in the accumulation and mobilization of energy reserves. These differences may allow S. zeamais to better withstand toxic compounds without reducing the beetles' reproductive fitness. Enzymatic assays with carbohydrate- and lipid-metabolizing enzymes were, therefore, carried out to test this hypothesis. Activity levels of trehalase, glycogen phosphorylase, lipase, glycosidase and amylase were determined in two insecticide-resistant populations showing (resistant cost) or not showing (resistant no-cost) associated fitness cost, and in an insecticide-susceptible population. Respirometry bioassays were also carried out with these weevil populations. The resistant no-cost population showed significantly higher body mass and respiration rate than the other two populations, which were similar. No significant differences in glycogen phosphorylase and glycosidase were observed among the populations. Among the enzymes studied, trehalase and lipase showed higher activity in the resistant cost population. The results obtained in the assays with amylase also indicate significant differences in activity among the populations, but with higher activity in the resistant no-cost population. The inverse activity trends of lipases and amylases in both resistant populations, one showing fitness disadvantage without insecticide exposure and the other not showing it, may underlay the mitigation of insecticide resistance physiological costs observed in the resistant no-cost population. The higher amylase activity observed in the resistant no-cost population may favor energy storage, preventing potential trade-offs between insecticide resistance mechanisms and basic physiological processes in this Population, unlike what seems to take place in the resistant cost population.10aSitophilus zeamais1 aAraujo, R., A.1 aGuedes, R., N. C.1 aOliveira, M., G. A.1 aFerreira, G., H. uhttps://weevil.myspecies.info/enhanced-activity-carbohydrate-and-lipid-metabolizing-enzymes-insecticide-resistant-populations-maiz00635nas a2200157 4500008004100000245012100041210006900162300001200231490000700243100002100250700001600271700001600287700001700303700002200320856013500342 2008 eng d00aRAPD and mitochondrial DNA analysis of the soybean stalk weevil, Sternechus subsignatus (Coleoptera: Curculionidae).0 aRAPD and mitochondrial DNA analysis of the soybean stalk weevil  a475-4810 v981 aSosa-Gomez, D.R.1 aCoronel, N.1 aBinneck, E.1 aZucchi, M.I.1 aRosado-Neto, G.H. uhttps://weevil.myspecies.info/rapd-and-mitochondrial-dna-analysis-soybean-stalk-weevil-sternechus-subsignatus-coleoptera-curculion02674nas a2200181 4500008004100000245008600041210006900127300001400196490000700210520202000217653002702237100002102264700001702285700002002302700002002322700001702342856013302359 2000 eng d00aThe diversity of beetle assemblages in different habitat types in Sabah, Malaysia0 adiversity of beetle assemblages in different habitat types in Sa a475–4960 v903 aThe diversity of beetle assemblages in different habitat types (primary forest,
logged forest, acacia plantation and oil palm plantation) in Sabah, Malaysia was
investigated using three different methods based on habitat levels (Winkler
sampling, flight-interception-trapping and mist-blowing). The overall diversity
was extremely high, with 1711 species recorded from only 8028 individuals and 81
families (115 family and subfamily groups). Different degrees of environmental
changes had varying effects on the beetle species richness and abundance, with oil
palm plantation assemblage being most severely affected, followed by acacia
plantation and then logged forest. A few species became numerically dominant in
the oil palm plantation. In terms of beetle species composition, the acacia fauna
showed much similarity with the logged forest fauna, and the oil palm fauna was
very different from the rest. The effects of environmental variables (number of
plant species, sapling and tree densities, amount of leaf litter, ground cover, canopy
cover, soil pH and compaction) on the beetle assemblage were also investigated.
Leaf litter correlated with species richness, abundance and composition of
subterranean beetles. Plant species richness, tree and sapling densities correlated
with species richness, abundance and composition of understorey beetles while
ground cover correlated only with the species richness and abundance of these
beetles. Canopy cover correlated only with arboreal beetles. In trophic structure,
predators represented more than 40% of the species and individuals.
Environmental changes affected the trophic structure with proportionally more
herbivores (abundance) but fewer predators (species richness and abundance) in
the oil palm plantation. Biodiversity, conservation and practical aspects of pest
management were also highlighted in this study.10aRhabdoscelus maculatus1 aChung, A., Y. C.1 aEggleton, P.1 aSpeight, M., R.1 aHammond, P., M.1 aChey, V., K. uhttp://journals.cambridge.org/download.php?file=%2FBER%2FBER90_06%2FS0007485300000602a.pdf&code=2c28f02ea5036aab417e3dfa463249ff00585nas a2200121 4500008004100000245015400041210006900195300001200264490000700276100002300283700002200306856013500328 2001 eng d00aFactors affecting parasitism by Microctonus aethiopoides Loan (Hymenoptera: Braconidae) and parasitoid development in natural and novel host species.0 aFactors affecting parasitism by Microctonus aethiopoides Loan Hy a245-2530 v911 aBarratt, B., I. P.1 aJohnstone, P., D. uhttps://weevil.myspecies.info/factors-affecting-parasitism-microctonus-aethiopoides-loan-hymenoptera-braconidae-and-parasitoid-dev00575nas a2200121 4500008004100000245015900041210006900200300000900269490000700278100001900285700001400304856013500318 1997 eng d00aSmicronyx species (Coleoptera: Curculionidae), economically important seed predators of Witchweeds (Striga spp.) (Scrophulariaceae) in sub-Saharan Africa.0 aSmicronyx species Coleoptera Curculionidae economically importan a3-170 v871 aAnderson, D.M.1 aCox, M.L. uhttps://weevil.myspecies.info/smicronyx-species-coleoptera-curculionidae-economically-important-seed-predators-witchweeds-striga-s02699nas a2200181 4500008004100000245008600041210006900127300001400196490000700210520204500217653002702262100002102289700001702310700002002327700002002347700001702367856013302384 2000 eng d00aThe diversity of beetle assemblages in different habitat types in Sabah, Malaysia0 adiversity of beetle assemblages in different habitat types in Sa a475–4960 v903 aThe diversity of beetle assemblages in different habitat types (primary forest,
logged forest, acacia plantation and oil palm plantation) in Sabah, Malaysia was
investigated using three different methods based on habitat levels (Winkler
sampling, flight-interception-trapping and mist-blowing). The overall diversity
was extremely high, with 1711 species recorded from only 8028 individuals and 81
families (115 family and subfamily groups). Different degrees of environmental
changes had varying effects on the beetle species richness and abundance, with oil
palm plantation assemblage being most severely affected, followed by acacia
plantation and then logged forest. A few species became numerically dominant in
the oil palm plantation. In terms of beetle species composition, the acacia fauna
showed much similarity with the logged forest fauna, and the oil palm fauna was
very different from the rest. The effects of environmental variables (number of
plant species, sapling and tree densities, amount of leaf litter, ground cover, canopy
cover, soil pH and compaction) on the beetle assemblage were also investigated.
Leaf litter correlated with species richness, abundance and composition of
subterranean beetles. Plant species richness, tree and sapling densities correlated
with species richness, abundance and composition of understorey beetles while
ground cover correlated only with the species richness and abundance of these
beetles. Canopy cover correlated only with arboreal beetles. In trophic structure,
predators represented more than 40% of the species and individuals.
Environmental changes affected the trophic structure with proportionally more
herbivores (abundance) but fewer predators (species richness and abundance) in
the oil palm plantation. Biodiversity, conservation and practical aspects of pest
management were also highlighted in this study. 10aRhabdoscelus maculatus1 aChung, A., Y. C.1 aEggleton, P.1 aSpeight, M., R.1 aHammond, P., M.1 aChey, V., K. uhttp://journals.cambridge.org/download.php?file=%2FBER%2FBER90_06%2FS0007485300000602a.pdf&code=2c28f02ea5036aab417e3dfa463249ff