Tree Defense Physiology to Bark Beetles
A special issue of Forests (ISSN 1999-4907).
Deadline for manuscript submissions: closed (20 October 2016) | Viewed by 15853
Special Issue Editor
Special Issue Information
Dear Colleagues,
Bark beetles (Coleoptera: Curculionidae, Scolytinae) are a rather host-specific group of insects that colonize the subcortical region of trees, primarily conifers. Several species are regarded among the most important of forest pests. Notable outbreaks may result in the mortality of billions of trees across tens of millions of hectares. Unlike most phytophagous insects, successful reproduction of bark beetles is contingent on death of all or part of the host tree. Consequently, intense selective pressure exists for physiological traits that confer host resistance. These involve formidable constitutive and inducible defenses, including anatomical, physical, and chemical components. At low levels of colonization, trees respond by confining invading beetles and their associated fungi within resin and necrotic lesions containing toxic or inhibitory compounds. However, above some critical minimum number of beetles, the defensive capacity of trees is compromised, and mortality occurs. As such, host colonization, and thus reproduction, are directly related to the depletion of host defenses.
Submitted manuscripts must be original contributions, not ones previously published or submitted to other journals. Papers published or submitted for publication in conference proceedings may be considered, provided that they are considerably extended and improved.
Dr. Christopher J. FettigGuest Editor
Manuscript Submission Information
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Keywords
- constitutive defense
- Dendroctonus
- host colonization
- host selection
- induced defense
- Ips
- plant-insect interactions
- tree physiology
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