Control of clubroot disease on Brassica campestris L. ‘Tennoji-kabura’ by several treatments

Abstract

We investigated the efficiencies of several treatments to control clubroot disease caused by Plasmodiophora brassicae on ‘Tennoji-kabura’ turnip (Brassica campestris L. ‘Tennoji-kabura’), a traditional vegetable in Osaka, Japan. Growing ‘Tanabe-daikon’ (Japanese radish) for 1.5 months as a decoy plant reduced the gall formation as is in the case of growing leafy daikon breeding line CR-1. Dolomite-converter slag raised the soil pH from 6.8 to 7.5, and remarkably suppressed the gall formation in ‘Tennoji-kabura’. A commercial seaweed fertilizer did not yield a significant effect.