Assessment of blue light treatments on citrus postharvest diseases

► Blue light effect on citrus decay symptom development including green mold, blue mold, stem end rot, and anthracnose was assessed. ► Blue light regimes inhibited green mold, blue mold, and stem end rot. ► Blue light retarded fungal development and fungal enzyme activity. ► Blue light-induced volatiles within Citrus flavedo, and the effect of volatiles was to reduce fungal pathogenicity.