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@ARTICLE{TreeBASE2Ref22249, author = {Hieu Sy Tran and Yupin Li and Mingpei You and Tanveer N Khan and Ian Pritchard and Martin John barbetti}, title = {Pea black spot disease complex in Western Australia ? composition of pathogens changes over time and with geographical location}, year = {2013}, keywords = {idymella pinodes, Phoma medicaginis var. pinodella, Phoma koolunga, Phoma herbarum, Phoma glomerata, pea black spot, Pisum sativum, field pea}, doi = {}, url = {http://}, pmid = {}, journal = {Plant Disease}, volume = {}, number = {}, pages = {}, abstract = {Black spot is a devastating disease on pea caused by one or more of a complex of pathogenic fungi belonging to Ascomycota; they include Ascochyta pisi, Didymella pinodes and Phoma pinodella. Two black spot surveys on pea were conducted in 2010 and 2012, in which samples were collected from 6 places across Western Australia. Representative isolates were identified based on ITS sequencing. Historical isolates, also produced from surveys across Western Australia in 1984, 1987, 1989 and 1996, were used to illustrate the change of the pea black spot pathogen composition over time and locations in Western Australia. Throughout the interval from 1984 ? 2012, some new pathogens associated with black spot, viz. Phoma koolunga, Phoma herbarum, and Boerema exigua var. exigua, and Phoma glomerata, were identified. Incidences of P. herbarum B. exigua var. exigua were just recorded one time in 2010. P. koolunga was reported to appear at two locations (Esperance and Katannning) in Western Australia in 2008-2009 by another study; in 2012 the pathogen was recognized at three other places, i.e. Dalwallinu, Nyabing and Northam. At Northam and Esperance, the incidence of P. koolunga recorded was high, and even predominated D. pinodes (Northam), and P. pinodella (Esperance). Although A. pisi still appears in other states of Australia and elsewhere, until the time of this study it had not been recorded in Western Australia. At most times and locations, D. pinodes was the predominant pathogen in the black spot complex. } }