The S​ociety of Irish Plant Pathologists 

Southern African Society for Plant Pathology

http://www.saspp.co.za

The Canadian Phytopathological Society

http://www.phytopath.ca

International Society for Plant Pathology

http://www.isppweb.org

Australasian Plant Pathology Society

http://www.appsnet.org

The American Phytopathological Society

http://www.apsnet.org

Stockbridge plant clinic

http://www.stockbridgetechnology.co.uk/horticultural_research/commercial_services/plant_clnic/diagnostic.php

CABI Plant Clinics

http://www.plantwise.org/plant-clinics

FERA Plant Clinic, U.K.

http://www.fera.co.uk/plantClinic

Ashtown plant diagnostics

http://www.teagasc.ie