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    Author(s): Shigehiko Shiyake; Yorio Miyatake; Michael Montgomery; Ashley Lamb
    Date: 2008
    Source: In: Onken, Brad; Reardon, Richard, comps. Fourth Symposium on hemlock woolly adelgid in the eastern United States; 2008 February 12-14; Hartford, CT. FHTET 2008-01. Morgantown, WV: U.S. Forest Service, Forest Health Technology Enterprise Team: 261-266.
    Publication Series: Other
    Station: Northern Research Station
    PDF: View PDF  (183.87 KB)

    Description

    Monthly samples of the hemlock woolly adelgid (HWA), Adelges tsugae, and predatory beetles were taken from Tsuga sieboldii near the border of Osaka and Kyoto prefectures. The beetles were collected by sweeping the canopy up to 5 meters height with nets. The phenology of HWA life stages were monitored by collecting branches and determining, under the microscope, the number of each stage of HWA present per cm twig length. The phenology of HWA on the hemlock appears to be similar to that observed in the eastern United States. Predacious beetles present included many generalist species, especially in the spring months.

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    Citation

    Shiyake, Shigehiko; Miyatake, Yorio; Montgomery, Michael; Lamb, Ashley. 2008. Hemlock woolly adelgid phenology and predacious beetle community on Japanese hemlocks. In: Onken, Brad; Reardon, Richard, comps. Fourth Symposium on hemlock woolly adelgid in the eastern United States; 2008 February 12-14; Hartford, CT. FHTET 2008-01. Morgantown, WV: U.S. Forest Service, Forest Health Technology Enterprise Team: 261-266.

    Keywords

    Adelges tsugae, Japan, Laricobius new species, Sasajiscymnus tsugae, seasonal history

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https://www.fs.usda.gov/treesearch/pubs/36536