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Infection by Peronospora somniferi and Peronospora meconopsidis from soil causing downy mildew of opium poppy


Krishnamoorthy, K and Thangavel, T and Jones, S and Scott, J and Wilson, C, Infection by Peronospora somniferi and Peronospora meconopsidis from soil causing downy mildew of opium poppy, Proceedings of the 10th Australasian Soilborne Diseases Symposium, 4-7 September 2018, Adelaide, South Australia, pp. 1-2. (2018) [Conference Extract]

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Downy mildew of opium poppy in Australia is caused by the obligate, oomycete pathogens Peronospora somniferi or Peronospora meconopsidis. Infections from the two pathogens lead to distinct disease symptoms; P. somniferi producing systemically infected plants that are stunted and chlorotic with profuse sporulation on foliage, whilst P. meconopsidis induced angular necrotic localized lesions with sparse sporulation. Plant infections from air-borne conidia, oospores and contaminated seed have been demonstrated. It is suspected that soil-borne inoculum may also provide important inoculum source but little is known about the process of soil-borne infection for the two species. The present study investigates the infection of poppy seedlings by the two pathogens from infested soil inoculum sources and examines subsequent pathogen spread within infected plants and disease development.

Item Details

Item Type:Conference Extract
Keywords:opium poppy, downy mildew, Peronospora
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant pathology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial crops
Objective Field:Plant extract crops
UTAS Author:Krishnamoorthy, K (Mrs Krithika Krishnamoorthy)
UTAS Author:Thangavel, T (Dr Tamil Thangavel)
UTAS Author:Jones, S (Dr Suzie Jones)
UTAS Author:Scott, J (Dr Jason Scott)
UTAS Author:Wilson, C (Professor Calum Wilson)
ID Code:128984
Year Published:2018
Deposited By:TIA - Research Institute
Deposited On:2018-10-30
Last Modified:2018-10-31

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