@article {15686, title = {Development of a semiochemical-based trapping method for the New Guinea sugarcane weevil, Rhabdoscelus obscurus in Guam}, journal = {Journal of Applied Entomology}, volume = {129}, year = {2005}, month = {March}, pages = {65-69}, type = {Article}, abstract = {Aggregation 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.}, keywords = {Behaviour, Chemical signals, Collecting techniques, Hosts, Land zones, Oceanic islands, Pacific Ocean islands, parasite, Techniques}, isbn = {0931-2048}, url = {://ZOOREC:ZOOR14107040851}, author = {REDDY, G. V. P. and Cruz, Z. T. and BAMBA, J. and MUNIAPPAN, R.} } @article {9187, title = {Studies on the biology, host specificity, and feeding behavior of Acythopeus cocciniae O{\textquoteright}Brien and Pakaluk (Coleoptera: Curculionidae) on Coccinia grandis (L.) Voigt (Cucurbitaceae) and Zehneria guamensis (Merrill) Fosberg (Cucurbitaceae)}, journal = {Micronesica}, volume = {41}, number = {1}, year = {2009}, month = {October}, pages = {71-82}, abstract = {The invasive plant ivy gourd Coccinia grandis (L.) Voigt (Cucurbitaceae) first appeared on Guam in the 1980s and subsequently spread to about 200 ha in the absence of natural enemies. Following its successful introduction as a biological control agent in Hawaii, the weevil Acythopeus cocciniae O{\textquoteright}Brien and Pakaluk (Coleoptera: Curculionidae) was brought to Guam under quarantine for host specificity testing against the endemic cucurbit, Zehneria guamensis (Merrill) Fosberg (Cucurbitaceae) and for further biological characterization. A. cocciniae preferred C. grandis over Z. guamensis in single- and two-host choice tests. No larval feeding was ever observed on Z. guamensis plants in two-host tests, and the single instance of A. cocciniae feeding on Z. guamensis in single-host tests was likely to avoid starvation. In 2004, A. cocciniae at the initial field release site in northern Guam dispersed primarily downwind in accordance to the prevailing northeasterly trade winds. However, only a single vine with a few adult weevils, larvae, and pupae were found at this site four years later in January 2008. This decrease was attributed to suppression by A. cocciniae. Since its initial release in 2004 A. cocciniae has established and dispersed throughout Guam.}, keywords = {Acythopeus cocciniae}, isbn = {0026-279X}, author = {Bamba, J. P. and Miller, R. H. and REDDY, G. V. P. and MUNIAPPAN, R.} } @article {4879, title = {Field Response of Guam Populations of the New Guinea Sugarcane Weevil, Rhabdoscelus obscurus (Boisduval) (Coleoptera: Curculionidae), to Aggregation Pheromones and Food Volatiles}, journal = {Micronesica}, volume = {37}, number = {1}, year = {2004}, pages = {57-68}, abstract = {Lures of aggregation pheromones of the Australian and Hawaiian populations of New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval), with other semiochemicals were used to clarify the identity of the weevil population in Guam. In a field experiment at eight different locations (Dededo, Tumon, Yigo, Hag{\r a}t{\~n}a, Mangilao, Yona, Agat and Malesso), plastic bucket traps baited with the lure of the Australian R. obscurus population in combination with a food volatile compound (ethyl acetate) and cut sugarcane captured significantly more weevils (total of 348) than traps baited with pheromone lure of the Hawaiian R. obscurus population in combination with food volatile and cut sugarcane which caught a total of 128 weevils. Traps baited with lure containing only the food volatile and cut sugarcane or only cut sugarcane captured significantly fewer weevils (total of 36 and 30, respectively) than those baited with pheromone compounds. Data from trap catches indicate that the Guam population of R. obscurus responded significantly more to the pheromone lure of the Australian population than to pheromone lure of the Hawaiian population indicating that the Guam R. obscurus population is related more closely to the Australian population. Trap catches at the Tumon and Dededo locations were greater than those in Yigo, Yona, Mangilao, Hag{\r a}t{\~n}a, Agat, and Malesso. Rainfall had a low correlation with trap catches at all locations except at Yigo where it positively correlated to the Australian population lure treatment. Semiochemical based trapping in weevil management has potential either in mass trapping or as part of an IPM program. A future line of work is also proposed for the control of weevil borers based on these initial results.}, keywords = {Dryophthoridae, Rhabdoscelus, Rhabdoscelus obscurus}, url = {http://www.wptrc.org/userfiles/file/Micronesica-2004.pdf}, author = {MUNIAPPAN, R. and BAMBA, J. and CRUZ, J. and REDDY, G. V. P.} } @article {1901, title = {Field response of Guam populations of the New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval) (Coleoptera: Curculionidae), to aggregation pheromones and food volatiles}, journal = {Micronesica}, volume = {37}, number = {1}, year = {2004}, month = {September}, pages = {57-68}, type = {Article}, abstract = {Lures of aggregation pheromones of the Australian and Hawaiian populations of New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval), with other semiochemicals were used to clarify the identity of the. weevil population in Guam. In a field experiment at eight different locations (Dededo, Tumon, Yigo, Hagatna, Mangilao, Yona, Agat and Malesso), plastic bucket traps baited with the lure of the Australian R. obscurus population in combination with a food volatile compound (ethyl acetate) and cut sugarcane captured significantly more weevils (total of 348) than traps baited with pheromone. lure of the Hawaiian R. obscurus population in combination with food volatile and cut sugarcane which caught a total of 128 weevils. Traps baited with lure containing only the food volatile and cut sugarcane or only cut sugarcane captured significantly fewer weevils (total of 36 and 30, respectively) than those baited with pheromone compounds. Data from trap catches indicate that the Guam population of R. obscurus responded significantly more to the pheromone lure of the Australian population than to pheromone lure of the Hawaiian population indicating that the Guam R. obscures population is related more closely to. the Australian population. Trap catches at the Tumon and Dededo locations were greater than those in Yigo, Yona, Mangilao, Hagatna, Agat, and Malesso. Rainfall had a low correlation with trap catches at all locations except at Yigo where it positively correlated to the Australian population lure treatment. Semiochemical based trapping in weevil management has potential either in mass trapping or as part of an IPM program. A future line of work is also proposed for the control of weevil borers based on these initial results.}, keywords = {Behaviour, Chemical, Collecting techniques, food, Land zones, Oceanic islands, Pacific Ocean, Techniques, volatile trap catches}, isbn = {0026-279X}, url = {://ZOOREC:ZOOR14105031179}, author = {MUNIAPPAN, R. and Bamba, Jesse and Cruz, Junard and REDDY, G. V. P.} } @article {1906, title = {Development of a semiochemical-based trapping method for the New Guinea sugarcane weevil, Rhabdoscelus obscurus in Guam}, journal = {Journal of Applied Entomology}, volume = {129}, number = {2}, year = {2005}, month = {March}, pages = {65-69}, type = {Article}, abstract = {Aggregation 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.}, keywords = {Behaviour, Chemical signals, Collecting techniques, Hosts, Land zones, Oceanic islands, Pacific Ocean islands, parasite, Techniques}, isbn = {0931-2048}, url = {://ZOOREC:ZOOR14107040851}, author = {REDDY, G. V. P. and Cruz, Z. T. and BAMBA, J. and MUNIAPPAN, R.} } @article {1880, title = {Field Response of Guam Populations of the New Guinea Sugarcane Weevil, Rhabdoscelus obscurus (Boisduval) (Coleoptera: Curculionidae), to Aggregation Pheromones and Food Volatiles}, journal = {Micronesica}, volume = {37}, year = {2004}, pages = {57-68}, chapter = {57}, abstract = { Lures of aggregation pheromones of the Australian and Hawaiian populations of New Guinea sugarcane weevil, Rhabdoscelus obscurus (Boisduval), with other semiochemicals were used to clarify the identity of the weevil population in Guam. In a field experiment at eight different locations (Dededo, Tumon, Yigo, Hag{\r a}t{\~n}a, Mangilao, Yona, Agat and Malesso), plastic bucket traps baited with the lure of the Australian R. obscurus population in combination with a food volatile compound (ethyl acetate) and cut sugarcane captured significantly more weevils (total of 348) than traps baited with pheromone lure of the Hawaiian R. obscurus population in combination with food volatile and cut sugarcane which caught a total of 128 weevils. Traps baited with lure containing only the food volatile and cut sugarcane or only cut sugarcane captured significantly fewer weevils (total of 36 and 30, respectively) than those baited with pheromone compounds. Data from trap catches indicate that the Guam population of R. obscurus responded significantly more to the pheromone lure of the Australian population than to pheromone lure of the Hawaiian population indicating that the Guam R. obscurus population is related more closely to the Australian population. Trap catches at the Tumon and Dededo locations were greater than those in Yigo, Yona, Mangilao, Hag{\r a}t{\~n}a, Agat, and Malesso. Rainfall had a low correlation with trap catches at all locations except at Yigo where it positively correlated to the Australian population lure treatment. Semiochemical based trapping in weevil management has potential either in mass trapping or as part of an IPM program. A future line of work is also proposed for the control of weevil borers based on these initial results. }, keywords = {Dryophthoridae, Rhabdoscelus, Rhabdoscelus obscurus}, url = {http://www.wptrc.org/userfiles/file/Micronesica-2004.pdf}, author = {MUNIAPPAN, R. and BAMBA, J. and CRUZ, J. and REDDY, G. V. P.} }