Acervulus

An apple bearing acervuli of the fungal pathogen <em>Glomerella cingulata</em>The fungus causes bitter rot in apple.

Acervulus, an open, saucer-shaped asexual fruiting body found in fungi (kingdom Fungi). Always developed below the epidermis of the host tissue, it bears conidiophores (specialized filaments, or hyphae) that form conidia (spores).

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Manjishtha Bhattacharyya.
Citation Information
Article Title: Acervulus
Website Name: Encyclopaedia Britannica
Publisher: Encyclopaedia Britannica, Inc.
Date Published: 02 November 2026
Access Date: November 13, 2026