Volume 39 - December 2007 : Hawaiian Entomological Society

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    Reports from the 2005 Centennial Conference of the Hawaiian Entomological Society
    (Hawaiian Entomological Society, 2007-12) Wright, Mark G. ; Rubinoff, Daniel ; Almeida, Rodrigo P.P. ; Wright, Mark
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    Exploits of some famous entomologists of the Hawaiian Entomological Society.
    (Hawaiian Entomological Society, 2007-12) Easton, Emmett R.
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    Efficacy of localized chemical treatments for Cryptotermes brevis (Isoptera: Kalotermitidae) in naturally infested lumber.
    (Hawaiian Entomological Society, 2007-12) Woodrow, R Joseph ; Grace, J Kenneth
    Localized injection of insecticides into termite galleries in infested wood represents an alternative to whole-structure fumigation for drywood termite control. The efficacy of this method is limited, however, by the use of repellant insecticides and the difficulty of locating drywood termite colonies. The present study addressed both issues by the use of an experimental acoustic emissions (AE) detector to assist in location of termite infestations in naturally infested shipping pallets, and application of the non-repellant insecticide spinosad (Dow AgroSciences). Chlorpyrifos 0.5% aerosol, 15% aqueous disodium octaborate tetrahydrate (DOT), resmethrin 0.25% aerosol, distilled water (control) and two treatments of 0.5% spinosad suspension concentrate (one with the injection site based on visual evidence and the other on acoustic evidence) were injected into boards in hardwood shipping pallets naturally infested with the drywood termite Cryptotermes brevis Walker. Termite mortality was greatest with spinosad treatments, although variability was high due to the continued difficulty of identifying and treating all separate areas of infestation in the boards.
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    Residential perimeter treatment trials in Hawaii with Thiamethoxam, Termidor, and Premise.
    (Hawaiian Entomological Society, 2007-12) Yates, Julian R. III
    Pre-1988 strategies for termiticide treatment of soil to prevent subterranean termite infestation in residential structures included application of organochlorine insecticides beneath concrete slabs through drilled holes at more than 2-foot intervals along the interior of perimeter and dividing walls. Post-1988 soil termiticides included organophosphates and pyrethroids. These less forgiving insecticides forced the pest control industry to change their treatment methods because of numerous call-backs that required re-treatments. Drill hole spacing through concrete slabs decreased to 1-foot intervals and exterior perimeter treatments were added to the management regime. With the advent of new non-repellent soil treatment termiticides, chemical manufacturers of these insecticides have devised a less intrusive treatment protocol that includes the remedial treatment of all known live infestations within the structure and a perimeter-only treatment of soil. For post-on-pier construction the perimeter of all piers is included in the treatment strategy. Results of field trials with three non-repellent termiticides (Thiamethoxam, Termidor, and Premise) are described.
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    Behavioral response of the Formosan subterranean termite to borate-treated wood.
    (Hawaiian Entomological Society, 2007-12) Campora, Cory E. ; Grace, J Kenneth
    Foragers of the Formosan subterranean termite, Coptotermes formosanus Shiraki, were allowed to tunnel in two dimensional, sand filled arenas containing Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) wafers pressure treated with disodium octaborate tetrahydrate (DOT) to an average retention of 1.77% BAE on one side of each arena, and untreated wafers of Douglas-fir on the other side. Arenas were established both in the laboratory and in the field. Initial tunnel formation was unaffected by the presence of borate-treated wood. Avoidance of borate-treated wood developed after ca. 3–5 days. Termites did not avoid borate-treated wood as a result of necrophobic behavior. Termite responses when the locations of the treated and untreated wafers were switched within the arenas indicated that the delayed avoidance was related to the location of the treated wood rather than to recognition of the chemical treatment.