You are here: Home
/ Publication Information
Title: Agrilus auroguttatus exit hole distributions on Quercus agrifolia boles and a sampling method to estimate their density on individual trees
Author: Haavik, Laurel J.; Coleman, Tom W.; Flint, Mary Louise; Venette, Robert C.; Seybold, Steven J.;
Source: The Canadian Entomologist. 144: 1-12.
Publication Series: Scientific Journal (JRNL)
Description: In recent decades, invasive phloem and wood borers have become important pests in North America. To aid tree sampling and survey efforts for the newly introduced goldspotted oak borer, Agrilus auroguttatus Schaeffer (Coleoptera: Buprestidae), we examined spatial patterns of exit holes on the boles (trunks) of 58 coast live oak, Quercus agrifolia Née (Fagaceae), trees at five sites in San Diego County, southern California, United States of America. Agrilus auroguttatus exit hole densities were greater at the root collar than at mid-boles (6.1m above ground). Dispersion patterns of exit holes on lower boles (r1.52 m) were random for trees with low exit hole densities and aggregated for trees with high exit hole densities. The mean exit hole density measured from three randomly chosen quadrats (0.09m2) provided a statistically reliable estimate of the true mean exit hole density on the lower bole, with, 25% error from the true mean. For future sampling and survey efforts in southern California oak forests and woodlands, exit hole counts within a 0.09m2 quadrat could be made at any three locations on lower Q. agrifolia boles to accurately estimate A. auroguttatus exit hole densities at the individual tree level.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
Haavik, Laurel J.; Coleman, Tom W.; Flint, Mary Louise; Venette, Robert C.; Seybold, Steven J. 2012. Agrilus auroguttatus exit hole distributions on Quercus agrifolia boles and a sampling method to estimate their density on individual trees. The Canadian Entomologist. 144:1-12.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility