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Psyche
Volume 2012 (2012), Article ID 794683, 5 pages
http://dx.doi.org/10.1155/2012/794683
Research Article

Attraction of Tomicus yunnanensis (Coleoptera: Scolytidae) to Yunnan Pine Logs with and without Periderm or Phloem: An Effective Monitoring Bait

1Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry and The Key Laboratory of Forest Ecology and Environment, State Forestry Administration, Beijing 100091, China
2College of Urban Construction, University of Shanghai for Science and Technology, Shanghai 200093, China
3U.S. Arid-Land Agricultural Research Center, USDA-ARS, 21881 North Cardon Lane, Maricopa, AZ 85138, USA
4College of Plant Sciences, Beijing Forest University, Beijing 100083, China

Received 6 October 2011; Revised 13 December 2011; Accepted 13 December 2011

Academic Editor: Qing-He Zhang

Copyright © 2012 Rong Chun Lu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The Yunnan pine shoot beetle, Tomicus yunnanensis Kirkendall and Faccoli (Coleoptera: Scolytinae) is an important pest of Yunnan pine (Pinus yunnanensis Franch) in China. Experiments with host log baits were done to develop a pest monitoring system using host tree kairomone. Five Yunnan pine logs (each 10–15 cm diam. × 30-cm long) in a trap-log bundle were treated by peeling periderm (outer bark) off to expose the phloem, and half of each log was covered with sticky adhesive to capture any attracted adult beetles. Significantly, more beetles were attracted and caught on the periderm-peeled logs (ca 30 beetles/m2 log surface/day) than on untreated control logs with adhesive (ca 2.5/m2/day). No significant differences were observed between catches on logs taken from lower or upper halves of Yunnan pines. T. yunnanensis flies mostly during the afternoon according to trap catches throughout the day. Attraction to the periderm-peeled logs decreased considerably when they were peeled further to remove the phloem, indicating phloem volatiles play a role in selection of the host by the beetle. The readily-available log baits appear useful for monitoring pine shoot beetle populations in integrated pest management programs.