acervulus

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acervulus

[ə′sər·vyə·ləs]
(mycology)
A cushion- or disk-shaped mass of hyphae, peculiar to the Melanconiales, on which there are dense aggregates of conidiophores.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Acervuli formed after 20 days on PDA, whereas acervuli formed within 10 days when autoclaved carnation leaves were added to the PDA.
It seems that environmental conditions, particularly the soil texture and the water table, for the development of the disease were more favorable in Sheikhupura compared to other districts and Moist weather favors the production of acervuli on dead plant parts (Hossain and Meah, 1992).
The crown appears dark because it is filled with black acervuli shoots that can be pulled from the infected crown.
Acervuli (the reproductive structures) are formed once the cortical tissue has experienced moderate disruption and begins with the development of a stroma in the tips of the epidermal cells.