Abstract

Wood of Hopea parviflora Bedd. and Vateria indica Linn. of the family Dipterocarpaceae was tested for natural resistance against five decay fungi (three white rotters and two brown rotters), adopting accelerated laboratory tests. Wood of H. parviflora is classified as 'highly resistant' as the average weight loss of wood exposed to any fungus was less than 10 percent. The average weight loss of wood of V. indica ranged from 13. 5 to 18. 0 percent. Wood of V. indica is classified as 'resistant'(weight loss range of 11 to 24 percent) . The weight loss caused by decay fungi decreased with increasing density in the case of H. parviflora (r square = 0. 60), whereas this relationship was poor in the case of V. Indica (r square = 0. 26)