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Standardization of Tapping Techniques of Gum Extraction in Lannea coromendelica:A Valuable Gum Yielding Tree


  • College of Forestry, Navsari Agricultural University, Navsari (Gujarat), India


Gum collection from trees is important livelihood sources for local dwellers in drought prone Rajasthan and its surroundings areas. The industrial application of natural gums have been expanded tremendously in recent years. Traditional method of gum tapping is crude and unscientific; the deep incision, untimely extraction and high concentration of chemicals in gum have affected the Lannea coromendelica species in its natural habitat. The studies were conducted for two years to standardize the tapping methods, tapping seasons, chemical concentration on trees having dbh >40cm from natural stands. For obtaining the maximum gums from these species, different tapping techniques have been applied to enhance the gum production. In bore hole tapping method, a hole of 5 cm is made on tree stem yielded higher gum yield when injected with ethephon concentration of 300 mg/ml and 400mg/ml in Lannea coromendelica. The Maximum gum production was obtained in borehole tapping method and minimum was procured from V-shaped tapping method. Ethephon has proved better extraction chemical over the sulphuric acid. Ethephon concentration of 300mg/ml showed the highest gum production of 144.2 grams/tree. However, lower concentration of sulphuric acid did not show significant results Ethephon induces gummosis without affecting the health of tree. Tapping seasons also significantly affect the gum production, the highest gum production of 66.94 gram /tree was obtained in April -June tapping season


Natural Gums, Tapping, Borehole Method, Ethephon, Lannea coromendelica.

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  • Anon. (2005).The wealth of India: Raw materials. Council of Scientific & Industrial Research. VI: 27-30.
  • Bau A.M. and Menon A.R.S. (1989). Ethephon induced gummosis in Bombax ceibaand sterculia urensRoxb. Indian Forester, 115(1):22-27.
  • Bhatt J.R. (1987) Gum tapping in Anogeissus latifolia using ethephon. Current Science, 56(8):936-940.
  • Bhatt J.R., Nair M.N.B. and Mohan Ram H.Y. (1989). Enhancement of oleo- gum resin production in Commiphora wightii by improved tapping techniques. Current science, 58(7):349-357.
  • Bhatt J.R. and Shah J.J. (1985). Ethephon (2-chloroethyl phosphonic acid) enhanced gumresinosis in mango, Mangifera indica L. Indian J. Experimental Biology, 23: 330-339.
  • Bhatt J.R. and Mohan Ram H.Y. (1990). Ethephon induced gum production in Acacia senegal and its potential value in the semi-arid regions of India. Current Science, 59: 1247-1250
  • Nair M.N.B., Bhatt J.R. and Shah J.J. (1985). Induction of traumatic gum cavities in sapwood of neem (Azadirachta indica A.Juss.) by ethephon and paraquat. Indian J. Experimental Biology, 23: 60-62.
  • Nair M.N.B., Patel K.R., Shah J.J., and Pandalai R.C. (1980). Effect of ethephon (2 Chloroethyl phosphonic acid) on gummosis in the bark of Azadirachta indica. Indian J. Experimental Biology, 18: 500-503.
  • Nair M.N.B. (2003) Gum tapping in sterculia urens Roxb. using ethephon. Paper presented in XII World Congress on Forestry Quebec city , Canada ( WFC/XII/0148-134HTM).
  • Nair M.N.B, Shivanna K.R. and Mohan Ram H.Y. (1995). Ethephon enhances Karaya gum yield & wound healing response. A preliminary report. Current Science, 69:809-810.
  • Prasad N., Sharma K.R., Tiwari J.C., Gupta R. and Thomas M. (2012). Mechanization of natural gum and resin tapping. J. Non –Timber Forest Products, 19(4):279-289.
  • Peters W. J., Roberts D.R. and Munson J. W. (1978). Ethrel, diquat, paraquat interaction in lightwood formation. Proceedings of the Lightwood Research Coordination Council Annual Meeting, Atlanta, Georgia. 31-39.p
  • Sharma K.R. and Dutt B. (2012). Networking project on harvesting, processing and value addition of natural resins and gums. Department of
  • Forest Products, Dr. Y. S. Parmar University of Horticulture and Forestry Nauni- Solan (HP).
  • Sharma K.R. and Chander lekha (2012). Borehole method for oleoresin tapping in Chirpine. Department of Forest Products, Dr. Y. S. Parmar University of Horticulture and Forestry Nauni- Solan (HP).
  • Snow A.G. (1949).Research on improvement of turpentine practices. Economic Botany, 3:375-394.
  • Tiwari J.C. and Ram M. (2010). Tree gum exudation techniques. Networking project on harvesting, processing and value addition of natural resins and gums. CAZRI, Jodhpur (Rajasthan).


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