Damage Assessment of Bark Beetle Infestations on Benguet Pine (Pinus kesiya Royle ex Gordon) in Camp John Hay, Baguio City, Philippines

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Marissa R. Parao Paquito P. Untalan Bonie S. Ligat Casiano S. Pagadan Leon B. Tanguid


The damage of bark beetle infestation on pine trees, and contributing factors in Camp John Hay, Baguio City, Philippines was assessed to provide bases for management actions. Biophysical conditions and tree health within eight plots were evaluated and described. In each plot, three trees were chosen where bark beetles were collected and brought to the laboratory for identification. Ips and Dendroctonus spp. were identified to be of utmost concern in pine tree health maintenance. The girdling effect of these beetles as they form galleries coupled with pine wilt disease caused most deaths of pines. The stressed conditions of trees in this tourist destination increased vulnerabilities. Risk ratings and early signs of infestations of pines can be used to detect attacks for immediate sanitation cutting. Improved soil nutrition, and avoidance of physical damage and wounds can be undertaken to maintain tree health and reduce infestation.

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