Effect of earthworms and incorporation of grass on Plasmodiophora brassicae
The resting spores of Plasmodiophora brassicae, causal agent of clubroot disease of crucifers, are tolerant structures with the abitity to survive for at least 15 years in soil waiting for a host. The influence of incorporation of cut grass (Lolium perenne) and presence of the earthworm Aporrectodea caliginosa on R brassicae resting spores was investigated in a microcosm experiment, and measured a