Fusarium equiseti

From ISTA Common Laboratory Seed Health Testing Methods for Detecting Fungi:

On blotters: Presence of small to big, orange coloured pionnotes on seed is characteristic of the species. Usually, the number of pionnotes is high, occupying a large area of the infected seed. The pionnotes can be wet, dry looking like rocks, or sometimes accompanied by scanty mycelium. 

Conidia are hyaline, falcate with a well developed pedicellate foot cell and an attenuated apical cell which is highly bent inwards, 3-7 septate but generally 5 septate, the lowermost and uppermost septa are slightly darkery than others, 22-60 x 3.5-6μm.