Author(s):

Dipti Choudhury, K Vidyasagaran, S Gopakumar, AV Santhosh and EV Anoop

Abstract: The experiment was carried out in the field of Instructional Farm, College of Forestry, KAU, Thrissur Kerala, during May 2017 to April 2018. One of the objective was to know the effect of climatic parameters and bark thickness on gum-oleoresin production in Ailanthus triphysa. A total of twenty seven trees were selected for conducting the experiment taking three different girth class i.e., less than 75cm, 75 to 150 cm, greater than 150 cm and three different extraction techniques i.e., V-Shaped method, Cup and Lip method and Straight-Cut method. Data analysis for whole study period revealed that the bark thickness are found to be positively correlated with coefficient value (r = 0.645) and all the different climatic parameter taken were found to be not correlated with gum-oleoresin production. As the Ailanthus triphysa mainly respond by injury made on tree.

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