Hemlock woolly adelgid phenology and predacious beetle community on Japanese hemlocks

Shigehiko Shiyake; Yorio Miyatake; Michael Montgomery; Ashley Lamb

Treesearch

Hemlock woolly adelgid phenology and predacious beetle community on Japanese hemlocks

Informally Refereed

Authors:

Shigehiko Shiyake, Yorio Miyatake, Michael Montgomery, Ashley Lamb

Year:

2008

Type:

Other

Station:

Northern Research Station

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.

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Abstract

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.

Keywords

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

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.