Effect of crude tall oil, linseed oil and rapeseed oil on the growth of the decay fungi
L Paajanen, A-C Ritschkoff
The influence of crude tall oil, linseed oil and rapeseed oil on the growth of Coniophora puteana, Poria placenta and Coriolus versicolor was studied. The selected test oils were observed to have different effects on the the fungal growth. Crude tall oil inhibited the radial growth of all fungi. Rapeseed oil either accelerated or inhibited the growth of fungi depending on the type of fungus involved. Crude tall oil applied to veneer samples did not produce inhibition zone on the growth medium. This indicates that the inhibitory effect of oil products is not caused by the broad-spectrum toxic mechanisms. In the ENV 807 soil box assessment soft-rot fungi were able to grow over the crude tall oil treated test specimens, regardless the fact that soft-rot decay was significantly prevented.