A form-genus of fungi which form septate mycelia and produce dark-coloured, non-septate conidia. They are saprotrophic on plant debris, and also parasitic in plants, causing a number of important diseases. B. cinerea causes grey mould on a wide range of plants and fruits; B. aclada (B. allii) causes neck-rot of onions. Compare noble rot.
Subjects: Plant Sciences and Forestry.