Volume 31 – 1992 : Hawaiian Entomological Society

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    Occurrence of the Twospotted Spider Mite, Tetranychus urticae Koch (Acari: Tetranychidae), in the Hawaiian Islands
    (Hawaiian Entomological Society, 1992) Jones, Vincent P. ; Hara, Arnold ; Hashimoto, Clark ; Rathman, Robin J. ; McMurtry, James A.
    The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), has been identified from several locations on the islands of Oahu, Maui and Hawaii. The importance of this fact with regard to importation of ornamentals and phytoseiid predators of spider mites reared on twospotted spider mite is discussed.
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    Notes on Two Species of Megaspilidae in Hawaii (Hymenoptera: Ceraphronoidea: Megaspilidae)
    (Hawaiian Entomological Society, 1992) Beardsley, John W.
    Two immigrant species of Megaspilidae appear to be established in Hawaii. One, placed here in the genus Dendrocerus Ratzeburg, is known only from elevations above 3,000 ft on the islands of Maui and Hawaii, and was first collected here in 1946. A second species, placed tentatively in the genus Megaspilus Westwood, was collected on Oahu at about 350 ft elevation in February 1991. Neither has yet been identified to species.
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    Evidence for Inhibition of Termite (Isoptera: Rhinotermitidae) Feeding by Extracellular Metabolites of a Wood Decay Fungus
    (Hawaiian Entomological Society, 1992) Grace, J Kenneth ; Goodell, Barry S. ; Jones, Wendy E. ; Chandhoke, Vikas ; Jellison, Jody
    Siderophores are iron-chelating extracellular fungal metabolites which may be involved in initiating wood decay. A purified siderophore extract isolated from the brown-rot decay fungus Gloeophyllum trabeum (Pers. ex Fr.) Murr. (Basidiomycetes: Polyporaceae) was found to deter feeding by Formosan subterranean termites, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae). This fungus has previously been associated with preferential feeding on decayed wood by subterranean termites, and solvent extracts have been reported to induce termite trail-following, arrestment, and/or aggregation. This is the first report of G. trabeum metabolites or fungal siderophores having a negative behavioral effect on subterranean termites.
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    Mediterranean Fruit Fly, Ceratitis capitata (Wiedemann), Reared from Fruit of Prunus ilicifolia (Nutt.) Walp. in Hawaii
    (Hawaiian Entomological Society, 1992) Beardsley, John W. ; Uchida, Grant K.
    During August 1990, six individuals of a native California chaparral tree, Prunus ilicifolia (Nutt.) Walp., were found growing at 6,600 ft. elevation al Pohakuloa, Hawaii Island. Two collections totaling 1,224 ripe fruit, made from these trees during September and November, yielded 1,649 mature larvae which produced 1,566 adults of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann). The average yield of Medfly adults/kg fruit was 277.13, indicating that P. ilicifolia is an excellent host for this pest. This finding may have implications for future Medfly eradication or control programs in California since P. ilicifolia is a widely distributed element of mesic chaparral communities there.
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    Establishment of Encarsia smithi (Silvestri) (Hymenoptera: Aphelinidae) on Pohnpei for Control of the Orange Spiny Whitefly, Aleurocanthus spiniferus (Quaintance) (Homoptera: Aleyrodidae)
    (Hawaiian Entomological Society, 1992) Muniappan, R. ; Marutani, M. ; Esguerra, Nelson
    Aleurocanthus spiniferus (Quaintance) was recognized as a serious problem on Pohnpei in 1987. Encarsia smithi (Silvestri) was released on January 7, 1988. The parasite was recovered on April 28, 1988, and an effective control of A. spiniferus was achieved by February 1989.