AgWest Plant Laboratories
https://www.agric.wa.gov.au/plant-biosecurity/agwest-plant-laboratories

Centre for Phytophthora Science & Management
http://www.cpsm-phytophthora.org/

Department of Parks and Wildlife
http://www.dpaw.wa.gov.au/management/pests-diseases
Formerly the Department of Environment and Conservation (DEC), The WA state government agency was split into the The Department of Parks and Wildlife (DPaW) and the Department of Environment Regulation (DER) in 2013.

Department of the Environment
http://www.environment.gov.au/
Search for 'dieback'

Dieback Information Delivery and Management Sysytem (DIDMS)
https://didms.gaiaresources.com.au 
Register to use the DIDMS website to be able to record, store share and map Phytophthora Dieback accross the South West of Western Australia. A  helpful public map can be viewed on the Project Dieback website at www.dieback.net.au/about/dieback-map

Global Invasive Species Database
http://www.issg.org/database/welcome/
The Global Invasive Species Database provides global information on invasive alien species focusing on invasive species that threaten biodiversity

Nursery & Garden Industry of Western Australia
http://www.ngia.com.au/Category?Action=View&Category_id=308

Perth Region NRM
http://www.perthregionnrm.com

Project Dieback
http://www.dieback.net.au/
The website for the State NRM funded 'Project Dieback: Action and opportunities for protecting biodiversity assets', a collaborative project involving a partnershop between South Coast NRM, DPaW, FBG, DWG and Murdoch University (CPSM).

Revegetation Industry Association of Western Australia (RIAWA)
http://www.riawa.com.au

South Coast NRM Inc
http://www.southcoastnrm.com.au/
Search for 'dieback'.

South West Catchments Council NRM
www.swccnrm.org.au