Volume 44 - December 2012 : Hawaiian Entomological Society

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    Trapping Records of Fruit Fly Pest Species (Diptera: Tephritidae) on Oahu (Hawaiian Islands): Analysis of Spatial Population Trends
    (Hawaiian Entomological Society, 2012-12) Leblanc, Luc ; Fujita, Brian ; Stein, Stuart H. ; Sawamura, Wesley K.
    Fruit fly monitoring traps with male lures (cue-lure, methyl eugenol, trimedlure, latilure) and food lure (torula yeast and BioLure) were maintained on the island of Oahu for three years (2006–2008) at 40 sites, characterized as rural or residential, with or without agriculture or feral forest in proximity. The 1.7 million flies collected belonged to species already known to be established in Hawaii (Bactrocera cucurbitae, B. dorsalis, B. latifrons, and Ceratitis capitata); no new invasive species were trapped, though the remotely possible presence of sibling species nearly identical to B. dorsalis can’t be ruled out. B. cucurbitae was predominant in leeward western Oahu and most abundant, in both rural and residential areas, wherever agriculture was practiced nearby. B. dorsalis was trapped in highest numbers in the windward northeastern portion of Oahu, and the presence of adjacent forest increased captures in both residential and rural environments. C. capitata was trapped in very large numbers at a coffee farm in Waialua and was rare at all other sites.
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    Little Fire Ant, Wasmannia auropunctata (Roger) (Hymenoptera: Formicidae), Established at Several Locations on Guam
    (Hawaiian Entomological Society, 2012-12) Raymundo, M.L. ; Miller, R.H.
    Little fire ant, Wasmannia auropunctata (Roger) (LFA), was identified in a karst-limestone forest adjacent to a green-waste hardfill in northern Guam in No- vember 2011. Six additional LFA infestations were identified at private residences and small farms along the southwest coast of the island. Surveillance surveys sug- gest that LFA has yet to spread to the neighboring islands of the Commonwealth of the Northern Mariana Islands (CNMI), or elsewhere in Micronesia. The spread of LFA to and throughout Guam is most likely due to human transport of infested plant material from LFA infested areas of Hawaii, Australia, or the U.S. mainland. The devastating effects of LFA on agriculture and forest ecosystems observed in LFA infested areas elsewhere are likely to occur on Guam and other Micronesian islands infested by LFA. Some LFA infestations on Guam may be eradicable using control techniques in use in Hawaii and other Pacific Basin countries.
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    First Records for the Aphid Greenidea ficicola Takahashi (Hemiptera: Aphididae) in Hawaii
    (Hawaiian Entomological Society, 2012-12) Nagamine, Walter T. ; Garcia, Janis N.
    First observations of the aphid Greenidea ficicola are recorded from Hawaii, which was found infesting Chinese banyan, Ficus microcarpa, at Kahaluu, Oahu, on January 6, 2011. This is the second species of the Asian genus Greenidea to become established in Hawaii.
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    Forcipomyia hardyi (Diptera: Ceratopogonidae), a Potential Pollinator of Cacao (Theobroma cacao) Flowers in Hawaii
    (Hawaiian Entomological Society, 2012-12) O'Doherty, Daniel C. ; Zoll, Janna J.K.
    Biting midges of the genus Forcipomyia are known to be important pollinators of cacao trees in cocoa producing countries throughout the world. Forcipomyia hardyi is endemic to the Hawaiian Islands and is here reported to pollinate cacao trees on the island of Oahu. We report that F. hardyi visits cacao flowers where it picks up pollen, and therefore it is potentially an important pollinator of cacao in Hawaii.
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    First Report of Exploitation of Coffee Beans by Black Twig Borer (Xylosandrus Compactus) and Tropical Nut Borer (Hypothenemus obscurus) (Coleoptera; Curculionidae: Scolytinae) in Hawaii
    (Hawaiian Entomological Society, 2012-12) Greco, Elsie B. ; Wright, Mark G.
    The black twig borer, Xylosandrus compactus, is an ambrosia beetle that was reported in Hawaii in 1960 and attacks branches of more than 200 plant species, including coffee. This beetle was found for the first time boring coffee berries in the district of Hilo on the island of Hawaii. Beetles reached the endo- sperm and caused damage without making galleries or ovipositing. The tropical nut borer, Hypothenemus obscurus, is a pest of macadamia nuts that has been in Hawaii since 1988 and was recently found for the first time in Hawaii attacking coffee berries. Its entry hole was observed close to the blossom area or the side of the berry. Sometimes damage was caused near the endosperm but no galleries or eggs were found. Descriptions of the biology, behavior and management of these beetles are provided in this paper.