02492nas a2200325   4500008004100000020001400041245008500055210006900140260000900209300001200218490000700230520159600237653001401833653002101847653001001868653001301878653002001891100002501911700002501936700001401961700001401975700001401989700002202003700002302025700001702048700002002065700001902085700002102104856004102125       1996                        eng d  a0015-404000aChemical and behavioral ecology of palm weevils (Curculionidae: Rhynchophorinae)0 aChemical and behavioral ecology of palm weevils Curculionidae Rh  cJune  a153-1670 v793 aPalm weevils in the subfamily Rhynchophorinae (Curculionidae) (Rhynchophorus spp., Dynamis borassi, Metamasius hemipterus, Rhabdoscelus obscurus, and Paramasius distortus) use male-produced aggregation pheromones for intraspecific chemical communication. Pheromones comprise 8, 9, or 10 carbon, methyl-branched, secondary alcohols. (4S,5S)-4-Methyl-5-nonanol (ferrugineol) is the major aggregation pheromone for R. ferrugineus, R. vulneratus, R. bilineatus, M. hemipterus, and D. borassi and a minor component for R. palmarum. (5S,4S)-5-Methyl-4-octanol (cruentol), (3S,4S)-3-methyl-4-octanol (phoenicol), and (4S,2E)-6-methyl-2-hepten-4-ol (rhynchophorol) are the main aggregation pheromones for R. cruentatus, R. phoenicis, and R. palmarum, respectively. Plant kairomones strongly enhance pheromone attractiveness but none of the identified volatiles, such as ethyl acetate, ethyl propionate, or ethyl butyrate are as synergistic as fermenting plant (palm or sugarcane) tissue. Studying orientation behavior of foraging weevils to semiochemical devices helped to design and test traps for weevil capture. Generally, 3 mg per day of synthetic pheromone (with non-natural stereoisomers being benign) plus insecticide-treated plant tissue constitute highly attractive trap baits. Potential exists for pheromone-based mass-trapping of weevils to reduce their populations and the spread of the weevil-vectored red ring disease, for monitoring their population dynamics to facilitate pest management decisions, and for detection and possible interception of non-native weevils at ports of entry.10aBehaviour10aChemical signals10aHosts10aparasite10aRhynchophorinae1 aGiblin-Davis, R., M.1 aOehlschlager, A., C.1 aPerez, A.1 aGries, G.1 aGries, R.1 aWeissling, T., J.1 aChinchilla, C., M.1 aPena, J., E.1 aHallett, R., H.1 aPierce, H., D.1 aGonzalez, L., M.  u<Go to ISI>://ZOOREC:ZOOR1330001728602849nas a2200217   4500008004100000020001400041245011400055210006900169300001400238490000700252520208600259100002502345700001402370700001502384700002202399700001702421700001402438700002502452700001902477856013502496       2000                        eng d  a0098-033100aAggregation pheromones of two geographical isolates of the New Guinea sugarcane weevil, Rhabdoscelus obscurus0 aAggregation pheromones of two geographical isolates of the New G  a2763-27800 v263 aThe aggregation pheromones were studied from two geographical isolates (Hakalau, Hawaii, and Silkwood, Queensland, Australia) of the New Guinea sugarcane weevil, Rhabdoscelus obscurus. Coupled gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric (MS) analyses of Porapak Q volatile extract from male and from female Hawaiian R. obscurus revealed a single EAD-active, male-specific candidate pheromone, which was identified as 2-methyl-4-octanol (1). Corresponding volatile analyses from male and from female Australian R. obscurus consistently revealed three EAD-active, male-specific candidate pheromone components that were identified as 1, (E2)-6-methyl-2-hepten-4-ol (rhynchophorol) (2), and 2-methyl-4-heptanol (3). In field experiment 1 in Hakalau, Hawaii, traps baited with a stereoisomeric mixture of synthetic 1 (3 mg/day) plus sugarcane captured more weevils than did traps baited with 1 or sugarcane alone or no bait, indicating that 1 is the pheromone of the Hawaiian R. obscurus population. In field experiment 2, conducted in Silkwood, Australia. traps baited with stereoisomeric mixtures of synthetic 1, 2. and 3 (3 mg/day each) plus sugarcane caught more weevils than did unbaited traps or traps baited with 1, 2, and 3 or sugarcane. Testing candidate pheromone components 1, 2, and 3 in experiments 2-5 in all possible binary, ternary, and quaternary combinations with sugarcane. indicated that 1 and 2 in combination, but not singly, are pheromone components of the Australian R. obscurus population. Weevils from several locations in Australia and Hawaii could not be differentiated using traditional morphological characters or ultrastructural comparisons with scanning electron microscopy (SEM). However, comparisons of mtDNA sequences (cytochrome oxidase I: regions 11 to M4; 201 base pairs) revealed 5.5% variation between the Hawaiian (N = 2) and the Australian (N = 4) samples. There was no intrapopulation variation in sequence data from the weevils from Hawaii versus Australia, suggesting that they are sibling species.1 aGiblin-Davis, R., M.1 aGries, R.1 aCrespi, B.1 aRobertson, L., N.1 aHara, A., H.1 aGries, G.1 aO'Brien, Charles, W.1 aPierce, H., D.  uhttps://weevil.myspecies.info/aggregation-pheromones-two-geographical-isolates-new-guinea-sugarcane-weevil-rhabdoscelus-obscurus-002762nas a2200205   4500008004100000245011400041210006900155300001400224490000700238520209100245653002602336100002502362700001402387700002202401700001702423700001402440700002502454700001902479856005802498       2000                        eng d00aAggregation Pheromones of Two Geographical Isolates of the New Guinea Sugarcane Weevil, Rhabdoscelus obscurus0 aAggregation Pheromones of Two Geographical Isolates of the New G  a2763-27800 v263 aThe aggregation pheromones were studied from two geographical isolates (Hakalau, Hawaii, and Silkwood, Queensland, Australia) of the New Guinea sugarcane weevil, Rhabdoscelus obscurus. Coupled gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric (MS) analyses of Porapak Q volatile extract from male and from female Hawaiian R. obscurus revealed a single EAD-active, male-specific candidate pheromone, which was identified as 2-methyl-4-octanol (1). Corresponding volatile analyses from male and from female Australian R. obscurus consistently revealed three EAD-active, male-specific candidate pheromone components that were identified as 1, (E2)-6-methyl-2-hepten-4-ol (rhynchophorol) (2), and 2-methyl-4-heptanol (3). In field experiment 1 in Hakalau, Hawaii, traps baited with a stereoisomeric mixture of synthetic 1 (3 mg/day) plus sugarcane captured more weevils than did traps baited with 1 or sugarcane alone or no bait, indicating that 1 is the pheromone of the Hawaiian R. obscurus population. In field experiment 2, conducted in Silkwood, Australia, traps baited with stereoisomeric mixtures of synthetic 1, 2, and 3 (3 mg/day each) plus sugarcane caught more weevils than did unbaited traps or traps baited with 1, 2, and 3 or sugarcane. Testing candidate pheromone components 1, 2, and 3 in experiments 2-5 in all possible binary, ternary, and quaternary combinations with sugarcane, indicated that 1 and 2 in combination, but no singly, are pheromone components of the Australian R. obscurus population. Weevils from several locations in Australia and Hawaii could not be differentiated using traditional morphological characters or ultrastructural comparisons with scanning electron microscopy (SEM). However, comparisons of mtDNA sequences (cytochrome oxidase I; regions I1 to M4; 201 base pairs) revealed 5.5% variation between the Hawaiian (N = 2) and the Australian (N = 4) samples. There was no intrapopulation variation in sequence data from the weevils from Hawaii versus Australia, suggesting that they are sibling species.<br />10aRhabdoscelus obscurus1 aGiblin-Davis, R., M.1 aGries, B.1 aRobertson, L., N.1 aHara, A., H.1 aGries, G.1 aO'Brien, Charles, W.1 aPierce, H., D.  uhttp://www.springerlink.com/content/q7r8j3v10m001777/02496nas a2200325   4500008004500000020001400045245008500059210006900144260000900213300001200222490000700234520159600241653001401837653002101851653001001872653001301882653002001895100002501915700002501940700001401965700001401979700001401993700002202007700002302029700001702052700002002069700001902089700002102108856004102129       1996                        Engldsh    a0015-404000aChemical and behavioral ecology of palm weevils (Curculionidae: Rhynchophorinae)0 aChemical and behavioral ecology of palm weevils Curculionidae Rh  cJune  a153-1670 v793 aPalm weevils in the subfamily Rhynchophorinae (Curculionidae) (Rhynchophorus spp., Dynamis borassi, Metamasius hemipterus, Rhabdoscelus obscurus, and Paramasius distortus) use male-produced aggregation pheromones for intraspecific chemical communication. Pheromones comprise 8, 9, or 10 carbon, methyl-branched, secondary alcohols. (4S,5S)-4-Methyl-5-nonanol (ferrugineol) is the major aggregation pheromone for R. ferrugineus, R. vulneratus, R. bilineatus, M. hemipterus, and D. borassi and a minor component for R. palmarum. (5S,4S)-5-Methyl-4-octanol (cruentol), (3S,4S)-3-methyl-4-octanol (phoenicol), and (4S,2E)-6-methyl-2-hepten-4-ol (rhynchophorol) are the main aggregation pheromones for R. cruentatus, R. phoenicis, and R. palmarum, respectively. Plant kairomones strongly enhance pheromone attractiveness but none of the identified volatiles, such as ethyl acetate, ethyl propionate, or ethyl butyrate are as synergistic as fermenting plant (palm or sugarcane) tissue. Studying orientation behavior of foraging weevils to semiochemical devices helped to design and test traps for weevil capture. Generally, 3 mg per day of synthetic pheromone (with non-natural stereoisomers being benign) plus insecticide-treated plant tissue constitute highly attractive trap baits. Potential exists for pheromone-based mass-trapping of weevils to reduce their populations and the spread of the weevil-vectored red ring disease, for monitoring their population dynamics to facilitate pest management decisions, and for detection and possible interception of non-native weevils at ports of entry.10aBehaviour10aChemical signals10aHosts10aparasite10aRhynchophorinae1 aGiblin-Davis, R., M.1 aOehlschlager, A., C.1 aPerez, A.1 aGries, G.1 aGries, R.1 aWeissling, T., J.1 aChinchilla, C., M.1 aPena, J., E.1 aHallett, R., H.1 aPierce, H., D.1 aGonzalez, L., M.  u<Go to ISI>://ZOOREC:ZOOR1330001728602792nas a2200217   4500008004100000022001500041245011500056210006900171300001400240490000700254520209300261653002602354100002502380700001402405700002202419700001702441700001402458700002502472700001902497856005802516       2000                        eng d  a0098-0331 00aAggregation Pheromones of Two Geographical Isolates of the New Guinea Sugarcane Weevil, Rhabdoscelus obscurus 0 aAggregation Pheromones of Two Geographical Isolates of the New G  a2763-27800 v263 aThe aggregation pheromones were studied from two geographical isolates (Hakalau, Hawaii, and Silkwood, Queensland, Australia) of the New Guinea sugarcane weevil, Rhabdoscelus obscurus. Coupled gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric (MS) analyses of Porapak Q volatile extract from male and from female Hawaiian R. obscurus revealed a single EAD-active, male-specific candidate pheromone, which was identified as 2-methyl-4-octanol (1). Corresponding volatile analyses from male and from female Australian R. obscurus consistently revealed three EAD-active, male-specific candidate pheromone components that were identified as 1, (E2)-6-methyl-2-hepten-4-ol (rhynchophorol) (2), and 2-methyl-4-heptanol (3). In field experiment 1 in Hakalau, Hawaii, traps baited with a stereoisomeric mixture of synthetic 1 (3 mg/day) plus sugarcane captured more weevils than did traps baited with 1 or sugarcane alone or no bait, indicating that 1 is the pheromone of the Hawaiian R. obscurus population. In field experiment 2, conducted in Silkwood, Australia, traps baited with stereoisomeric mixtures of synthetic 1, 2, and 3 (3 mg/day each) plus sugarcane caught more weevils than did unbaited traps or traps baited with 1, 2, and 3 or sugarcane. Testing candidate pheromone components 1, 2, and 3 in experiments 2-5 in all possible binary, ternary, and quaternary combinations with sugarcane, indicated that 1 and 2 in combination, but no singly, are pheromone components of the Australian R. obscurus population. Weevils from several locations in Australia and Hawaii could not be differentiated using traditional morphological characters or ultrastructural comparisons with scanning electron microscopy (SEM). However, comparisons of mtDNA sequences (cytochrome oxidase I; regions I1 to M4; 201 base pairs) revealed 5.5% variation between the Hawaiian (N = 2) and the Australian (N = 4) samples. There was no intrapopulation variation in sequence data from the weevils from Hawaii versus Australia, suggesting that they are sibling species.<br />
10aRhabdoscelus obscurus1 aGiblin-Davis, R., M.1 aGries, B.1 aRobertson, L., N.1 aHara, A., H.1 aGries, G.1 aO'Brien, Charles, W.1 aPierce, H., D.  uhttp://www.springerlink.com/content/q7r8j3v10m001777/