Definition of chocolate spot in US English:

chocolate spot

noun

  • A fungal disease affecting field and broad beans, characterized by dark brown spots on all parts of the plant.

    This is caused by the fungus Botrytis fabae (sometimes the gray mold B. cinerea), phylum Ascomycota

    • ‘The chocolate spot pathogen causes small, circular brown spots of dead tissue on the leaves.’
    • ‘The focus here is on chocolate spot of Vicia beans caused by both B. fabae and B. cinerea.’
    • ‘Folicur is recommended for chocolate spot and rust.’
    • ‘A rapid in-vitro assay has also been developed for screening faba beans for resistance to chocolate spot disease.’
    • ‘The rapid development of chocolate spot is favoured by wet humid weather.’