Fig. 2

Diseased crippled Agaricus xanthodermus fruiting body. a, b The upper surface of the cap, c, d the surface of the bended stipe, and e, f parts of the lamellae are overgrown by foreign mycelium with conidiophores visible as white flocks in the aerial mycelium (d). g–i For infestation of the lamellae, the foreign mycelium grew first over their edges, with conidiophore production starting about 6 to 7 mm behind the growth front (g; see white flocks at the right side of the photo). j–n Conidia and conidiophores in mycelial samples taken for microscopy from the lamellae. Note the blastic generation of conidiospores at the tips of phialides (arrows in k–l) and dehiscence scars (basal hilum) at the spores (see arrow in j) and also the small brown basidiospores of the host (m). Sizes bars correspond to 5 mm (g), 1 mm (h), 200 µm (i), 50 µm (k) and 20 µm (j, l–n)