Tree dieback incidence in Nathiagali and surrounding hills [Pakistan]
2006
Javaid, A. | Bajwa, R. | Shafique, S. | Shafique, S.,Punjab Univ., Lahore(Pakistan). Dept. of Mycology and Plant Pathology
Surveys of Nathiagali, Dongagali, Ayubia and Mukshpuri, conducted duringJuly-August 2005, and revealed the presence of tree dieback at these hillstations. The two most commonly occurring gymnospermic plant species viz.,Abies pindrow Roxb. and Pinus wallichiana A. B. Jackson exhibited 5 and 2%dieback, respectively. The less frequently occurring species Taxus baccata Linnshowed only 1% dieback while Cedrus deodara (Roxb.) Loud and rarelyoccurring species Picea smithiana (Wall.) Boiss did not show any signs ofdieback. Among the broad-leaved angiospermic plant species, Populus ciliataBoenm, Quercus incana W. Bartram and Aesculus indica Colehr., showed thehighest dieback incidence of 4% each followed by Ulmus wallichiana Planch. (2%)and Acer pictum Thunb. ex Murroy (2%). Root infecting fungi, frost winds, agingand human activities could be the possible causes of dieback in these hillstations.
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