First report of black spot caused by Boeremia exigua var. exigua on field pea in Australia.
Black spot is a major disease of field pea (Pisum sativum) production across southern Australia. Recently, a single-spore isolations of a single culture each from an infested pea crop at Medina, Moora, and Mt. Barker in W.A. were made onto PDA. Purified DNA products were sequenced for the 3 isolates and then BLASTn was used to compare sequences with those in GenBank. Our sequences (GenBank Accession Nos. JN37743, JN377439, JN 377438) had 100% nucleotide identity with P. exigua var. exigua accessions (GI13385450, GI169894028, and GI189163921), an earlier synonym of what is now known as Boeremia exigua var. exigua. This is thought to be the first report of B. exigua var. exigua on field pea in Australia.