Field Occurrence of Tapesia Yallundae, the Teleomorph of Pseudocercosporella Herpotrichoides.

A Multiplex PCR Test for Determination of Mating Type Applied to the Plant Pathogens Tapesia yallundae and Tapesia acuformis

“…This confirmed that isolates of both mating types were present throughout Europe (of 22 isolates tested, 54% were MAT-1 and 46% were MAT-2), as might be predicted because the sexual stage has been found in many European countries (Lucas et al, 2000). Both mating types were also detected in newly isolated samples from New Zealand (Table 1) and apothecia have previously been reported from the Southland region of that country (Sanderson and King, 1988). However, there was a predominance of the MAT-1 genotype in New Zealand (of 28 isolates tested, 86% were MAT-1 and 14% were MAT-2) although isolates were not clonal because differences were evident in RAPD-PCR fingerprint patterns (Dyer and Meakin, unpublished results).…”

Occurrence of Tapesia yallundae, teleomorph of Pseudocercosporella herpotrichoides, on unharvested wheat culms in England

“…In order to investigate the association of the apothccia with P. herpotrichoides. single-ascosporc isolates were prepared by the method of Sanderson & King (1988). Ascospores were allowed to eject naturally onto tap-water agar from a single apothecium mounted in petroleum jelly on the lid of an inverted petri dish.…”

“…Wallwork & Spooner (1988) described this as a new species, T. yattundae. Sanderson & King (1988) reported apothecia of T. yattundae on stubble of both wheat and barley in New Zealand.…”

Development of apothecia of the eyespot pathogen Tapesia on cereal crop stubble residue in England

“…These apothecia discharged ascospores that gave rise to mycelial colonies bearing conidia corresponding to the W‐type of P. herpotrichoides and the teleomorph was named Tapesia yallundae (Wallwork, 1987; Wallwork & Spooner, 1988). Apothecia of T. yallundae have since been detected in the field in New Zealand, many European countries and in South Africa (Sanderson & King, 1988; Hunter, 1989; Moreau et al ., 1989; Cavelier, 1994; Robbertse et al ., 1994; Sindberg et al ., 1994; Dyer & Lucas, 1995). In all instances, apothecia were found only on straw stubble left after harvest, rather than on living plant hosts.…”