Differential behaviour of wood rotters at water repellent Rubberwood
H C Nagaveni, S S Chauhan, K S Rao
Rubberwood samples treated with different concentration of aqueous solution of chromic acid has induced significant increase in water repellency and attains dimensional stability. Though water repellency and dimensional stability was achieved by treatment, the fungal invasion could not be completely controlled. Differential level of decay of brown and white rot in wood treated with water repellent compound is observed. Wood shows complete protection from white rot but failed to prevent the invasion of brown rot in water repellent rubber wood. These treatments were found to be very effective even at a low concentration of 2.5% in protecting decay due to white rots as compared to brown rot. Effectiveness of these treatments against white rot may be attributed to formation of lignin-chromic acid complex.
Keywords: CHROMIC ACID; RUBBER WOOD; BROWN ROT; WHITE ROT; BIODETERIORATION