Studies on biocontrol of mouldy core are limited. In China certain strains of Bacillus subtilis were shown to give some control of mouldy core caused by Alternaria, Tricothecium and Fusarium. Serenade ASO (Bacillus subtilis) has an EAMU authorisation (2360/2018) for use on apple to control Botrytis . Efficacy against mouldy core is not known.