Is it true that bark combats plant disease?
There is a large amount of experimental research work showing very definite inhibition of a number of plant root diseases by composed bark. These include RHIZOCTONIA, PYTHIUM, PHYTOPHTHORA, tomato root knot and forsythia parasitic nematodes. The exact mechanisms involved are not yet proven but some anti-biotic effect is suspected arising from micro-organisms in the bark. In addition, the improved root environment i.e. improved aeration and drainage is also through to be an important factor in maintaining healthy roots.
