Abstract Taking pakchoi variety‘Xiamanduo’as test material，this paper studied the control effect
of biocontrol bacteria（live spores 10 billion · g-1 Bacillus subtilis WP）combining with soil conditioner as a
comprehensive treatment model on club root disease by fi eld experimental method．The results showed that the
treatment of B.subtilis coating agent+soil coditioner+300-fold diluents of B. subtilis irrigating root had the best
eff ect on controlling club root disease，reaching 93.56%．The incidence rate and disease index of club root
disease were all remarkably lower than that of the other treatments．While the biomass of pakchoi and control
eff ect of club root disease were all signifi cantly higher than that of the other treatments．
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Received: 05 January 2020
Published: 24 February 2020
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